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Based on the high chemical stability and excellent end‐group functionalization capability of polyhedral oligomeric silsesquioxane (POSS), this study utilized thiol‐functionalized POSS (POSS‐SH) in a click chemistry reaction with styrene‐butadiene‐styrene triblock copolymer (SBS). The objective was to design a functional group forming a chemical bond with the polymer matrix, resulting in the preparation of thiol‐functionalized polyacrylonitrile (PAN) fibers chemically cross‐linked with POSS‐SH/PAN/SBS hybrid material. This hybrid material not only enhanced the compatibility between the components but also facilitated a connection between the fiber and SBS, thereby improving the mechanical properties of the modified asphalt. Fourier transform infrared spectroscopy, field emission scanning electron microscopy (FESEM), and atomic force microscopy analyses confirmed the successful modification of POSS‐SH/PAN fibers. FESEM analysis of the modified asphalt verified that POSS‐SH/PAN fibers contributed to strengthening the interfacial performance between the fiber and asphalt. Cone penetration and dynamic shear rheometer tests indicated that, compared to SBS‐modified asphalt, PAN/SBS and POSS‐SH/PAN/SBS‐modified asphalt exhibited enhanced shear strength, deformation resistance, and viscoelastic properties. Additionally, at 46°C, the storage modulus (G′) of 1.5% POSS‐SH/PAN/SBS‐modified asphalt increased by 11% compared to 1.5% PAN/SBS asphalt, with increases of 13.75% and 10.8% in loss modulus (G″) and complex modulus (G*), respectively. [ABSTRACT FROM AUTHOR]

Utilizing efficient and cost‐effective modifiers is essential for the development of high‐performance asphalt materials. In this study, a polydopamine (PDA) chelated cobalt ion (Co2+)‐assisted in situ growth strategy was employed to anchor nanoporous zeolite imidazolium salt framework‐67 (ZIF‐67) on polyester (PET) fiber substrates for the preparation of styrene‐butadiene‐styrene block copolymer‐modified asphalt (SBS‐MA). Experimental results indicated that optimal fiber incorporation of 1.5% led to the best interfacial interaction at the modified asphalt fracture section. ZIF‐67 nanoporous structure acted as an organic–inorganic hybridization interfacial layer to enhance the fiber–asphalt interfacial interaction. The adhesion work of the modified fiber with SBS‐MA increased by 42.12%. Furthermore, the adhesion work, peeling work, and compatibility ratio of modified asphalt with aggregates were also improved. Similarly, the complex modulus of the 1.5% ZIF‐67–PDA–PET/SBS‐MA at 46°C was increased by 131.30% in comparison with that of the pristine SBS‐MA. More importantly, the synergistic effect of the highly thermally stable PET fibers and ZIF‐67 nanocrystals improved the thermal decomposition of SBS‐MA. These results suggest that ZIF‐67–PDA–PET fiber holds great promise for application in designing novel materials for the construction industry. [ABSTRACT FROM AUTHOR]

Fiber-modified asphalt has excellent road performance, but the mechanism of this enhancement still requires deeper understanding. Herein, the interfacial interaction between fibers and asphalt is explored using an adsorption kinetic model with the adsorption of fibers on the four components of asphalt as a criterion. The proposed pseudo-first-order kinetic model and pseudo-second-order kinetic model were developed using aramid fibers (AF) and AF-polydopamine (PDA)-octadecylamine (ODA) (AF-PDA-ODA), which were prepared by grafting ODA onto AF with PDA and nacre fibers and molybdenum disulfide (MoS2). Fourier-transform infrared (FT-IR) spectroscopy analysis confirmed that the modified fibers exhibit physical and chemical cross-linking with the four components of asphalt, which facilitated the uniform distribution of fiber and effectively improved its compatibility with asphalt. This led to the formation of an excellent network structure that consequently boosted the rheological properties of the modified-fiber-incorporated asphalt. [ABSTRACT FROM AUTHOR]

A composite graphene oxide (GO) modifier was prepared by co‐deposition of polydopamine (PDA) and hexadecyltrimethoxysilane (HDTMS) with hydrophobic function to enhance the interfacial interaction between GO and asphalt. Dopamine as a medium enhances the adhesion of the hydrophobic functional material HDTMS on the surface of GO. And the long alkyl chains of HDTMS molecules greatly reduce the surface free energy and ensure the dispersion stability of composite GO modifier in styrene–butadiene–styrene (SBS) modified asphalt. The physical properties of modified asphalt show that the ductility, high‐temperature stability, and viscosity of asphalt can be improved by the addition of PDA/HDTMS composite GO modifiers (DH‐GO). Among them, 0.04% DH‐GO composite SBS modified asphalt binder (DH‐GO/SBSMB) has the best mechanical properties. Compared with 0.05% GO composite SBS modified asphalt binder (GO/SBSMB), the softening point of 0.04% DH‐GO/SBSMB increased by 8.3%, the penetration degree decreased by 9.7%, and the elongation increased by 18.2%. Dynamic shear rheometer (DSR), multiple stress creep recovery (MSCR) and rotational viscosity (RV) tests show that 0.04% DH‐GO/SBSMB has higher high‐temperature stability, plasticity, and viscosity than 0.05%GO/SBSMB, which meets the requirements of asphalt construction specifications. [ABSTRACT FROM AUTHOR]

In this study, a novel multiscale synergistic reinforced polyester fiber (PET) was prepared by a bionic coating and electrostatic synergism. The three‐dimensional (3D) interconnected structure was developed on the surface of PET by electrostatically synergistic hybridization of negatively charged 2D lamellar graphene oxide (GO) and positively charged 1D hollow tubular aminated halloysite nanotubes (HNT). These fibers were applied to prepare fiber incorporated styrene‐butadiene‐styrene modified asphalt (SBS@MA). X‐ray photoelectron spectroscopy, atomic force microscopy, and field emission scanning electron microscopy analyses revealed that the 3D interconnected highly rough structure was constructed on the fiber surface. The surface free energy and adhesion work at the fiber and asphalt were calculated from the contact angle tests, which showed that adhesion work of the modified fibers was improved by 30% compared with the original fibers, confirming the better adhesion performance of GO‐mHNT‐PET fibers with the asphalt. The improved mechanical and viscoelastic characteristics of the modified GO‐mHNT‐PET/SBS@MA were verified by dynamic shear rheometer, and multistress creep recovery tests. At 46°C, the complex modulus of 1.5% GO‐mHNT‐PET/SBS@MA was 31.02% higher compared with that of PET/SBS@MA. This study provides a promising strategy for the preparation of PET/SBS@MA materials with excellent mechanical properties and interfacial bonding. [ABSTRACT FROM AUTHOR]

Hydrophobic modification of bagasse fibers (BFs) through a green approach can promote its reuse in asphalt and enhance the utilization value of agricultural and forestry waste in road engineering. In contrast to traditional chemical modification, this study reports a new method for the hydrophobic modification of BFs using tannic acid (TA) and the in situ growth of FeOOH nanoparticles (NPs), resulting in FeOOH-TA-BF, which is used to prepare styrene–butadiene styrene (SBS)–modified asphalt. The experimental results show that the surface roughness, specific surface area, thermal stability, and hydrophobicity of the modified BF are improved, which is beneficial for enhancing the interface compatibility with asphalt. Specifically, compared with BF/SBS-modified asphalt, FeOOH-TA-BF/SBS-modified asphalt exhibits 39.21% and 23.26% increase in the elastic modulus G′ and viscous modulus G″, respectively, at the optimal dosage of 2.5%, corresponding to 6.15-fold and 7.13-fold increase in the fatigue life at 2.5% and 5.0% strain respectively, and 22.0% improvement in shear resistance performance. In the meantime, 2.5-fold enhancement of the storage stability. Therefore, this study provides a simple, environmentally friendly, and efficient hydrophobic modification method that is of great significance for promoting the resource utilization of solid waste BF. [ABSTRACT FROM AUTHOR]

The mechanical properties of fiber composites are greatly affected by the interfacial interactions between the fibers and matrix, and hence the study of interfacial properties becomes critical. This study demonstrates a simple and effective interfacial modification process using polydopamine (PDA) coating with ZnO nanorods to construct a multi‐scale bionic structure on the polyacrylonitrile (PAN) fiber, which is conducive to increasing the bonding area and enhancing the load transfer, thus boosting the mechanical properties of the modified fiber‐incorporated asphalt binder. The cone penetration test and thermogravimetric analysis show that the octopus‐inspired multiscale PAN fiber (OIM‐PAN) composite styrene butadiene styrene modified binder (SBS/MB) has better shear strength and thermal stability. Dynamic shear rheometer test shows that the deformation resistance and viscoelastic properties of the fiber composite SBS/MB are enhanced compared with SBS/MB, and the OIM‐PAN composite SBS/MB (OIM‐PAN@SBS/MB) exhibits the best deformation resistance and viscoelastic properties. Thus, it can be concluded that this interfacial modification process can significantly improve the mechanical properties of fiber–asphalt composites by introducing a third phase between the fiber and asphalt interface to achieve functionally graded material properties and enhance the load transfer between the interfaces for large‐scale applications in road engineering and construction sites. [ABSTRACT FROM AUTHOR]

Weak interfacial effect between fiber and asphalt is considered to be main limitation in the extensive improvement of composite materials. Herein, a weaker interfacial layer between fiber and asphalt has extensively been modified via non‐destructive grafting. For this, poly dopamine (PDA) with highly active sites and lipophilic octadecylamine (ODA) with strong absorption were aimed to composite with aramid fiber (AF) as AF‐PDA‐ODA following biomimetic chemistry; hence the interfacial influence on asphalt was investigated. Fourier transform infrared spectroscopy showed that AF‐PDA‐ODA composite was successfully prepared, which generated an effective chemical coupling reaction with asphalt. Contact angle measurement and specific surface analyzer tests confirmed that AF‐PDA‐ODA has better lipophilicity and larger specific surface area. Fluorescence microscopy tests confirmed that AF‐PDA‐ODA formed a uniformly developed network structure over asphalt, whereas scanning electron microscopy confirmed the "wave" structure of AF‐PDA‐ODA asphalt with stress buffering. Additionally, the adhesion was calculated via dynamic rheological shear apparatus where the tensile test showed that PDA‐ODA polymer interface layer enhanced the asphalt's fracture resistance as well as the mechanical properties of the asphalt has effectively been improved. This could provide an alternative asphalt material with enhanced adhesion and mechanical resistance properties in construction and building. [ABSTRACT FROM AUTHOR]

A green and efficient two‐step method was used to modify the surface of aramid fiber with a double shell structure by compounding MoS2 with dopamine and tannic acid to develop nacre fiber with enhanced interfacial effect, which was in turn applied to prepare nacre fiber incorporated modified asphalt. The nacre fiber and its incorporated modified asphalt were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), fluorescence microscopy (FM), and dynamic shear rheometer (DSR). FTIR results indicated that the nacre fiber was highly dispersed in the matrix asphalt while it was highly thermally stable (THRI of 207.4°C) as confirmed by thermogravimetric analysis. FM and SEM analyses confirmed that the nacre fiber formed a uniformly dispersed and well‐developed three‐dimensional network structure in the matrix asphalt, which endorsed the nacre fiber modified asphalt with enhanced mechanical and viscoelastic properties as confirmed by DSR tests. [ABSTRACT FROM AUTHOR]

Resource utilization of spent refractory material (SRM) is beneficial for achieving environmental protection and resource recycling. We developed a modified agent for asphalt modification, incorporating "bayberry"-like hexamethyldisilazane and tannic acid for sutured modification of SRM(HMDS-TA-SRM). This includes the mechanism of low concentration (6.17 mg/L) occurring in process F-, and the mechanism of hydrophobicity and "bayberry"-like nano-rough surface acquisition is explained from multiple perspectives. The modifier also forms a dual protection layer with the asphalt, leveraging the surface-specific hydrophobic capillary structure, demonstrating excellent safety performance in neutral, acidic, alkaline, and high salt four simulated solutions for up to 1 year of soaking (the highest leaching rate being 0.486%). Through simulation experiments, it was found that the HMDS-TA-SRM modified asphalt maintains good barrier ability (180d leaching rate of 1.05%) and fatigue resistance even after 10 years. The material modification method is green and efficient, and the SRM-asphalt new system has feasibility and long-term safety. [Display omitted] • Explanation of the origin of nano-rough surfaces. • Explanation of fluorine ion solidification using the solubility product theory. • Adsorption mechanism of oily components on modifier's surface explored. • Exploration for enhancing long-term stability of SRM modified asphalt. [ABSTRACT FROM AUTHOR]

In this study, a pioneering surface modification technique in the development of fiber-modified asphalt binders, employing mussel-inspired chemistry principles, is proposed. By co-depositing tannic acid/polyethyleneimine (TA/PEI) and various crystalline forms of molybdenum disulfide (MoS 2) on the surface of polyacrylonitrile (PAN) fibers, three types of PAN fibers with different surface morphologies (NF-PAN, NS-PAN, and NT-PAN) were successfully synthesized. This led to the preparation of three modified asphalt binders (NF-PAN/SBS, NS-PAN/SBS, and NT-PAN/SBS). Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray Spectroscopy (EDS), and Atomic Force Microscopy (AFM) tests demonstrated the effective combination of two-dimensional MoS 2 with PAN fibers. They confirmed the enhancement in interfacial interaction between the fibers and asphalt due to the high specific surface area and Young's modulus of NF-PAN. Further asphalt binder performance tests indicated that NF-PAN/SBS exhibited the best shear strength, viscoelastic properties, and thermal stability in high-temperature performance tests and the best creep recovery rate and stiffness modulus in low-temperature performance tests. Specifically, at a 2% fiber content, NF-PAN/SBS demonstrated improvements of 48.8% in complex modulus (G*), 55.5% in storage modulus (G'), and 45.3% in loss modulus (G'') compared to the asphalt binder with unmodified PAN (PAN/SBS), and an increase of 11.04 °C in thermal decomposition temperature, with an 11.17% and 24.32% improvement in creep recovery rate at low temperatures compared to PAN/SBS. Additionally, the addition of MoS 2 also enhanced the microwave absorption capability of the fiber composite modified asphalt binder, providing a better internal heat source reception for subsequent road maintenance. This research offers a novel and sustainable solution for enhancing asphalt binders, particularly suitable for challenging environmental conditions. It is expected to provide more efficient and rational modification methods for fiber and nano two-dimensional material-modified asphalts and offers significant references for the composite and synergistic modification of various asphalt components. [Display omitted] • Co-deposition modification of PAN surface with TA/PEI and MoS2 based on mussel bionics. • Surface modification of PAN enhances the interfacial interaction of NF-PAN, NS-PAN, and NT-PAN with asphalt. • NF-PAN/SBS asphalt has the best high-temperature viscoelastic properties and thermal stability. • NF-PAN/SBS asphalt exhibits the best low-temperature creep recovery rate and modulus of strength. • Incorporation of MoS2 enhances the microwave heat absorption of asphalt. [ABSTRACT FROM AUTHOR]

Agroforestry solid waste bagasse fiber (BF) possesses sustainable, carbon-neutral characteristics when used as a reinforcement material for asphalt pavements. However, the incompatibility between BF and the asphalt matrix limits its wide application. This study proposes a strategy for cost-effective and environmentally friendly modification of fiber surfaces, aiming to transform a drawback into an advantage. That is, the lignin in BF, which affects the tensile strength of fibers, is dissolved by a deep eutectic solvent (DES) system, and then the lignin is reborn on the surface of the fibers with the assistance of tannic acid. Based on the hydrophobicity and free radical trapping properties of lignin, regenerated lignin is expected to act as a natural coupling agent between BF and styrene-butadiene-styrene (SBS) asphalt materials and as an anti-aging agent for asphalt. The experimental results showed that the modified BF realized the enhancement of asphalt interfacial compatibility and toughening of asphalt matrix. Specifically, the shear resistance, viscoelasticity and rutting resistance of the modified BF/SBS-modified asphalt were improved by 46.61%, 22.67% and 30.06%, respectively, and the UV aging susceptibility was decreased by 75.02% compared with that of the BF/SBS-modified asphalt. In conclusion, this work introduces a simple and practical strategy for enhancing the interaction between BF and asphalt, which is crucial for advancing biomass recycling and green transportation development. [Display omitted] [ABSTRACT FROM AUTHOR]

Graphical abstract Highlights • PS-GNPs and ODA-GNPs modifiers were used to prepare SBS added binder mixtures. • PS-GNPs and ODA-GNPs/SBS added binder mixture had better Anti-rutting property. • PS-GNPs and ODA-GNP/SBS binder showed enhanced anti-water damage performance. • Modification mechanism of PS-GNPs and ODA-GNPs in SBS added binder was proposed. Abstract The temperature, anti-rutting and road performance of Polystyrene graphene nanoplatelets (PS-GNPs)/Styrene butadiene Styrene (SBS) incorporated binder and Octadecyle amine Graphene Nanoplatelets (ODA-GNPs)/SBS incorporated binder were comparatively analyzed by DSR, MSCR, BBR, Time sweep, Marshall water stability, freeze-thaw splitting and rutting tests. 0.02% PS-GNPs binder incorporated SBS exhibited better performance in terms of mechanical properties and anti-water damage performance than ODA-GNPs and SBS (within the scope of the study). The textural characterization of the modified GNPs were performed via XRD, SEM, and AFM. Based on the properties and characterization results, two types of comparative modification mechanisms were proposed. The asphalt binder and mixture exhibited stronger adhesive forces which offered higher resistance to water damage. This study could greatly help in formulating and designing SBS incorporated binder for target applications. [ABSTRACT FROM AUTHOR]

This study is based on the principles of thermodynamics and utilizes the Hansen solubility parameter theory and molecular dynamics simulation techniques. By introducing solubility parameters and interaction parameters, modified molecular models for rubber and aged asphalt are constructed. The study systematically investigates the mechanisms underlying the effects of polyphenolic chemical modification and oxidative aging on the performance and compatibility changes of rubber asphalt. The results show that the solubility parameter (δ T) of the asphalt system decreases gradually with increasing temperature. At a temperature of 160 °C, the solubility parameter difference (Δ δ T) between the asphalt and rubber power (RP) is minimized, indicating the highest degree of compatibility between the two materials. After chemical modification, the solubility parameter of the RP increases, the difference in solubility parameter between the RP and asphalt decreases, and the chemical modification improves the compatibility of the two phases. Oxidative aging causes a shift in the composition ratio of asphalt towards asphaltene, leading to an increase in the solubility parameter of asphalt and a larger difference in solubility parameter between the system. As a result, the compatibility of modified asphalt decreases. [ABSTRACT FROM AUTHOR]

[Display omitted] • MCE-PAN fibers enhance flame-retardant properties of modified asphalt binder. • Improved fire safety in MCE-PAN/SBS/MA binder is indicated by a 25.24% rise in LOI. • The inclusion of MCE-PAN boosts asphalt binder's thermal stability by 105℃. • MCE-PAN fiber addition significantly augments low-temperature crack resistance. • MCE-PAN improves its interfacial adhesion performance with asphalt binder. The current study utilizes polyacrylonitrile (PAN) as the foundational material, augmented with multi-walled carbon nanotubes (MWCNTs) and nano-calcium carbonate (nCC) as additives. Utilizing electrospinning techniques, micro-nanoscale composite fibers possessing elevated surface areas (MCE-PAN) were synthesized. Experimental data indicate that MCE-PAN enhances both the flame-retardant and mechanical attributes of the modified asphalt binder. Specifically, MCE-PAN elevates the limiting oxygen index (LOI) of the modified asphalt binder by 25.24%, increases smoke suppression efficiency by 10.67%, elevates the decomposition temperature by 105℃, and substantially curtails smoke emission. MCE-PAN manifests significant hydrophobic characteristics, thus augmenting the interfacial interactions between PAN fibers and the asphalt binder. Additionally, at an ambient temperature of 46℃, the complex modulus (G*) of the MCE-PAN/SBS/MA modified asphalt binder, with a 0.1% loading, surged by 52% relative to the SBS modified asphalt binder (SBS/MA); the storage modulus (G') escalated by 101.4%, and the loss modulus (G'') increased by 75.6%. Under low-temperature conditions, the MCE-PAN/SBS/MA modified asphalt binder demonstrates enhanced resistance to crack propagation. This investigation not only introduces an innovative approach to fiber synthesis but also elucidates its applicability in augmenting the performance and flame retardancy of asphalt pavements. It thereby holds significant practical, environmental, and energy-saving implications for sustainable, flame-retardant asphalt pavement, particularly in tunnel applications and high-temperature settings. [ABSTRACT FROM AUTHOR]

[Display omitted] • This provides a novel analytical approach for understanding the mechanism of improving the macroscopic properties of SBS-modified asphalt with nanomaterials. • The modification mechanisms of carbon nanomaterials on asphalt include both chemical reactions and physical mixing. • Carbon nanomaterials can promote the dispersion and cross-linking of SBS in the oil phase, as well as filling in the asphaltene. Based on the four-component separation technology of asphalt, the influence mechanism of carbon nanotubes (CNTs), graphene microsheets (GNPs) and graphene oxide (GO) in SBS-modified asphalt four-component was systematically analyzed by combining macroscopic properties and microscopic characteristics, as well as exploring the morphological distribution of SBS in asphalt four-component. According to the results of Fourier transform infrared spectroscopy and field emission scanning electron microscopy, the modification mechanism of asphalt by three types of carbon nanomaterials follows two pathways: chemical reaction and physical blending. The addition of CNTs, GNPs, and GO results in the destruction of long carbon chains of the saturated fraction in SBS-modified asphalt, and promotes the aggregation of SBS in the asphaltene, as well as its dense distribution and crosslinking in the oil fractions. The results of the fluorescence microscopy test and phase separation test showed that the dispersing effect of the three carbon nanomaterials could alleviate the aggregation phenomenon of SBS, improve the mutual integration between SBS and matrix asphalt, and promote the storage stability of SBS-modified asphalt. Therefore, based on the excellent mechanical properties of the three carbon nanomaterials and their promotion of filling and crosslinking of SBS in asphaltene, they have made significant contributions to the mechanical properties of carbon nanomaterials-composite SBS modified asphalt. This can also be demonstrated by DSR testing and conventional physical property testing. This study hopes to provide a viable analytical route for the use of nanomaterials in modulating the four-component structure and improving the properties of asphalt. [ABSTRACT FROM AUTHOR]

[Display omitted] • Innovative apply MXene in the field of UV resistance of ecological road materials. • Expound on the interaction mechanism of MXene, SBS and asphalt. • Clarify the UV shielding mechanism of MXene/SBS modified asphalt. • Analyze the effect of regulation and control of MXene properties on UV resistance of modified asphalt. The pursuit of improving the special properties of modified asphalt using advanced nanomaterials and understanding its mechanism based on material properties is highly attractive topic. In this study, four types of MXene (Ti 3 C 2 Tx) (prepared by adjusting the synthesis methods) were incorporated into styrene–butadienestyrene (SBS) block copolymer modified asphalt as ultraviolet (UV) aging resistant modifiers. The UV aging behaviors, such as asphalt photo-oxidation and SBS copolymer degradation, were evaluated by simulating UV aging of modified asphalts using indoor equipment. The chemical and rheological results showed that MXene incorporated modified asphalts had excellent high-temperature performance and rutting resistance. Furthermore, MXene incorporation significantly inhibited asphalt oxidation and SBS copolymer degradation. The underlying mechanism of these intriguing properties was found to be the few-layered structure and -F, -O surface end groups of MXene, which were the key factors responsible for the enhanced anti-UV aging performance of modified asphalt. [ABSTRACT FROM AUTHOR]

The central toxic part of the aluminum industry's overhaul slag, as high value-added recycling of spent refractory material (SRM), contributes to environmental protection and resource recycling. Herein, a "bayberry"-like hexamethyldisilazane-tannic acid-SRM (HMDS-TA-SRM) modifier was prepared by a simultaneous "precipitation-TA wrapping" reaction design and a secondary grafting reaction with HMDS. The design allows the material to be treated with a concentration of F− (5.93 mg/L) that meets the Chinese primary wastewater discharge standard (10 mg/L). HMDS-TA-SRM with hydrophobic (water contact angle = 104.3°) nano-sized microsphere stacking surface exhibited good interfacial interaction with the matrix bitumen. At 64 °C and 0.1 kPa and 3.2 kPa pressures, the deformation recovery capacity of the HMDS-TA modified asphalt was increased by 34.9% and 45.6% compared to that of the pristine SBS-modified asphalt, respectively. At the same time, the double wrapping of the modified film and bitumen significantly improved the sequestration capacity of hazardous substances, with a cumulative F− exudation of only 0.45% after 180 d of immersion. Attributed to the green, cost-effective and efficient modification method, the new SRM-asphalt system could be deemed of great promise for the safe application of SRM. [Display omitted] • A simple simultaneous reaction strategy achieves the high value of highly toxic waste refractory-based asphalt modifiers. • The surface modified film layer of the spent refractory material-based modifier possessed high hydrophobicity. • Spent refractory material-based modifier film added asphalt exhibited better double protection. • The spent refractory material based SBS modified asphalt has better viscoelastic properties and long-term stability. [ABSTRACT FROM AUTHOR]

[Display omitted] • Innovative application of Fenton reaction in the modification of polyacrylonitrile fibers. • Biomimetic multi-layered structure modified polyacrylonitrile fibers. • KF-PAN/SBS/RP modified asphalt had better viscoelastic performance. • KF-PAN/SBS/RP modified asphalt had better low temperature anti-cracking performance, high temperature stability and fatigue damage resistance. • KF-PAN/SBS/RP modified asphalt had better rutting resistance and high temperature adhesion performance. In this study, a surface modified polyacrylonitrile fiber (KF-PAN) with a fish-scale whisker-like biomimetic hierarchical structure was successfully prepared via in situ competition effect of Fenton reaction. The modified fibers were used as secondary modifiers to prepare fiber-reinforced styrene–butadienestyrene (SBS) block copolymers and rubber powder (RP) modified asphalt binders (KF-PAN/SBS/RP). Energy dispersive spectroscopy, scanning electron microscopy, and atomic force microscopy analyses revealed the successful construction of bionic hierarchy on the fiber surface, and confirmed rough surface of the KF-PAN fibers. The hierarchical structure of the fiber surface acted as a buffer in the asphalt and strengthened the mutual interaction of the fiber and asphalt. Dynamic rheometer shear and strip-tensile tests showed that the KF-PAN/SBS/RP modified asphalt exhibited better viscoelasticity, rutting resistance, and tensile properties than the PAN/SBS/RP modified asphalt. The linear amplitude sweep test showed that KF-PAN/SBS/RP modified asphalt had better fatigue resistance. Thermogravimetric analysis tests indicated that the surface bionic structure of KF-PAN fibers boosted thermal stability of the fibers, which in turn enhanced the thermal stability of KF-PAN/SBS/RP modified asphalt. Fluorescence microscopy analysis showed that incorporating KF-PAN fibers improved the SBS and RP microstructure inside the asphalt, forming a good mesh structure, and alleviating the stress concentration phenomenon in SBS/RP asphalt under external traffic load. [ABSTRACT FROM AUTHOR]

[Display omitted] • Innovative application of APTES, co-deposition of PEI and PDA in the modification of polyacrylonitrile fibers. • Double-layer membrane structure modified polyacrylonitrile fibers. • P-P/A-P/PAN and A-P/PAN with higher surface free energy, roughness and adhesion. • P-P/A-P/PAN/SBS@MA and A-P/PAN/SBS@MA had better viscoelastic properties. • P-P/A-P/PAN/SBS@MA and A-P/PAN/SBS@MA had better low temperature crack resistance and high temperature adhesion properties. To further enhance the properties of polyacrylonitrile (PAN) fiber incorporated modified asphalt, a new method of PAN fiber modification with a double membrane was developed. The influence of interface characteristics of modified fiber on the properties of fiber-reinforced asphalt was revealed from the free energy of the fiber surface and the adhesion between the modified fiber and matrix asphalt. Two types of PAN modified fibers with single-layer membrane structure (A-P/PAN) and double-layer membrane structure (P-P/A-P/PAN) were prepared, which were applied to synthesize three types of modified asphalts (Mas), i.e., PAN/SBS@MA, A-P/PAN/SBS@MA, and P-P/A-P/PAN/SBS@MA. Dynamic shear rheometer (DSR) experiment showed that at 46℃, the G*, G', and G' of P-P/A-P/PAN/SBS@MA were 24%, 19%, and 37% higher than those of PAN/SBS@MA. Similarly, at 175 ℃, the maximum yield strength of P-P/A-P/PAN/SBS@MA was 16.38% and 32.7% higher than those of A-P/PAN/SBS@MA and PAN/SBS@MA, respectively, which was attributed to the better surface free energy and adhesion work of the modified fibers. The surface contact angle test results showed that free energy of the surface and adhesion work of P-P/A-P/PAN fibers are 62% and 26.5% higher than those of PAN fibers, respectively. Scanning electron microscopy, atomic force microscopy, and UV-Vis tests indicated that the fiber's surface has successfully constructed a double-layer membrane structure. The fluorescent microscopy and cryo-SEM tests of the modified asphalt further confirmed that the modified PAN fiber had better interfacial interaction with the base asphalt. This study shows that the double-layer film modified PAN fiber composite SBS asphalt has good viscoelastic properties, high temperature adhesion, and low temperature fracture resistance, and hence carries critical practical engineering applications for highways, low temperature area pavements, airport pavements, and construction pavement. [ABSTRACT FROM AUTHOR]

[Display omitted] • Polyacrylonitrile fibers are modified based on biomimetic structure. • MB-PAN/SBS modified asphalt had better viscoelastic performance. • MB-PAN/SBS modified asphalt had higher rutting resistance and thermal stability. • MB-PAN/SBS modified asphalt showed higher interfacial properties. In this study, polydopamine/polyethyleneimine (PDA/PEI) bionic coating and nano-silica were self-assembled on the surface of polyacrylonitrile (PAN) fiber to construct bionic multilevel hierarchical structures. The fiber composites were in turn used as secondary modifiers to prepare fiber reinforced styrene butadiene styrene modified asphalt binder (SBS@M-AB). Field emission scanning electron microscopy, energy dispersive spectroscopy, and atomic force microscopy analyses revealed rough surface of the modified fiber and successfully constructed a biomimetic multi-level hierarchical structure. These intriguing aspects are conducive to mitigating the local high stress of SBS@M-AB and achieving multi-scale mitigation of stress concentration, which in turn improves the performance of Mud-brick PAN fiber (MB-PAN) incorporated SBS@M-AB. Dynamic shear rheometer test showed that MB-PAN/SBS@M-AB exhibited better viscoelastic properties and deformation resistance than the pristine PAN/SBS@M-AB. TG test showed that the bionic multi-level hierarchical structure enhanced the interfacial properties of fiber materials which in turn boosted the thermal stability of MB-PAN/SBS@M-AB. The cone penetration analysis showed the much higher shear strength of MB-PAN/SBS@M-AB than the pristime SBS@M-AB. The results of this study are promising and challenging for designing modified asphalts with better thermal and mechanical performance for practical applications in construction and highway industries. [ABSTRACT FROM AUTHOR]

[Display omitted] • Biomimetic Fe 3 O 4 -PET and Fe 3 O 4 -CS-PET fibers were prepared inspired from mussel. • Modified-PET fibers/SBSMA asphalts showed improved viscoelastic properties. • Fe 3 O 4 -CS-PET fiber/SBSMA showed the best mechanical performance. • Enhanced performance of Fe 3 O 4 -CS-PET fiber was due to reactive surface structure. Conventional polyester (PET) fiber with smooth surface and chemical inertness limit the high-temperature rheological properties of styrene–butadienestyrene modified asphalt (SBSMA). Herein, we report the fabrication of biomimetic Fe 3 O 4 -PET modified fiber and Fe 3 O 4 -chitosan(CS)-PET modified fiber via chelation reaction and schiff base reaction, respectively, which are inspired from the interface structure of "mussel scallop shell". Fe 3 O 4 -PET@SBSMA and Fe 3 O 4 -CS-PET@SBSMA exhibited increased the shear by 10.6% and 69.7%, G' (46 °C) by 14.5% and 29.6%, and R (0.1 kPa) by 7.6% and 15.1% respectively with increased flow resistance, viscoelasticity and rutting resistance than that of pristine PET@SBSMA. The increased surface roughness and chemical composition of bionic Fe 3 O 4 -PET and Fe 3 O 4 -CS-PET fibers enhanced the dispersion of polymer in base asphalt, which resulted in boosting the mechanical properties of the fiber incorporated SBSMAs. This study provides a convenient and eco-friendly method for fabricating new bionic fiber functional composites modified asphalt with potential applications in construction and road/highway industries, and provides a scientific theoretical basis for the applications of biomimetic fiber for improving the properties of asphalt based materials. [ABSTRACT FROM AUTHOR]

[Display omitted] • GO was modified via induction of ferric tannate chelates by cations in salt. • Fe3+-TA network effectively improved self-stacking and agglomeration of GO in asphalt binder. • The creep flexibility of Fe3+-TA-GO/SBS-MA is lower than SBS–MA at 0.1 kPa and 3.2 kPa stress conditions. • The internal structure of Fe3+-TA-GO modified asphalt is more uniform and developed. Herein, fast and uniform deposition of tannic acid iron ion self-assembled metal–organic network (Fe3+-TA) was established using salt induction strategy over graphene oxide (GO) based styrene butadiene styrene (SBS) support (Fe3+-TA-GO/SBS) to prepare modified asphalt. Mechanical properties of the SBS modified asphalt (SBS-MA), GO/SBS-MA, and Fe3 + -TA-GO/SBS-MA were systematically studied via dynamic shear rheometer, multiple stress creep recovery test, and thermogravimetric analysis. The mechanism of Fe3+-TA-GO in SBS-MA was elucidated by Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy. Results showed that the penetration of 0.10 % Fe3+-TA-GO/SBS-MA is 38.3 % lower than that of SBS-MA, which indicates excellent viscoelastic properties, rutting resistance, and thermal stability 0.10 % Fe3+-TA-GO/SBS-MA modified asphalt. This green biomimetic modification method effectively solves the agglomeration problem of GO in asphalt and promotes the formation of a well-developed SBS network structure in Fe3+-TA-GO/SBS-MA, which could be considered as a promising approach for the preparation of modified asphalt with enhanced properties for practical applications. [ABSTRACT FROM AUTHOR]

• IPDI was modified by LDHs via cross-linking reaction. • IPDI-LDHs exhibited good dispersion in SBS modified asphalt. • IPDI-LDHs/SBS modified asphalt had good plastic deformation ability and high temperature stability. • IPDI-LDHs/SBS modified asphalt realized excellent aging resistance. • The interaction mechanism between IPDI-LDHs and asphalt was proposed. In order to improve the aging resistance of styrene–butadienestyrene (SBS) modified asphalt, isophorone diisocyanate-layered double hydroxide (IPDI-LDHs) modifier was synthesized by cross linking reaction using IPDI to facilitate organic surface modification on ZnAl-LDHs. IPDI-LDHs was characterized by XRD, FT-IR, SEM, and EDS techniques, which confirmed the successful grafting of IPDI over LDHs. The effect of IPDI-LDHs incorporation on various properties of SBS modified asphalt were systematically studied. The results showed that IPDI-LDHs exhibited good dispersibility in SBS modified asphalt, while the softening point of 0.3% IPDI-LDHs/SBS modified asphalt was 8% higher than that of the pristine SBS modified asphalt. Similarly, at a frequency of 10 Hz, the complex modulus (G*) of 0.3% IPDI-LDHs/SBS modified asphalt at 46 °C was 46.8% higher than that of original SBS modified asphalt while the ductility of 0.4% IPDI-LDHs/SBS modified asphalt was 34.3% higher than that of SBS modified asphalt. It was further confirmed that IPDI-LDHs can improve the plastic deformation ability and high temperature performance of SBS modified asphalt. The modified asphalt after short-term aging and ultraviolet (UV) aging, was evaluated for various aging indexes of physical properties, rheological properties and functional groups analysis, which revealed that IPDI-LDHs significantly enhanced the aging resistance of pristine SBS modified asphalt. This study provides useful reference for preparing secondary SBS modified asphalt with enhanced resistance against thermal aging and UV aging for applications in construction and highway industries. [ABSTRACT FROM AUTHOR]

• Modified fiber was used to prepare aminated graphene fiber added asphalt. • NH 2 -GNPs/D-PAN asphalt had better hydrophobicity than PAN asphalt. • NH 2 -GNPs/D-PAN added asphalt had better viscoelastic performance. • NH 2 -GNPs/D-PAN asphalt mixture had better the low temperature performance. The inert nature of polyacrylonitrile (PAN) fiber limits the development of fiber asphalt pavement, which can however be tackled by modifying PAN. In this paper, PAN was modified via self-polymerization of dopamine and covalent grafting of aminated graphene, which were in turn used to prepare three kinds of modified asphalt. Dynamic shear rheometer (DSR) tests showed that the aminated graphene modified fiber based asphalt had better viscoelasticity and resistance to permanent deformation than the pristine fiber added asphalt. 3% NH 2 -GNPs/D-PAN modified asphalt exhibited about 8% higher G* than 3% PAN modified asphalt at a fixed shear frequency. The aminated graphene modified asphalt exhibited enhanced hydrophobicity, adhesion work and water resistance (increased by 14%) than unmodified PAN fiber added asphalt as determined via contact angle measurement. Trabecular bending test and water-immersed Marshall stability test showed that NH 2 -GNPs/D-PAN incorporated modified asphalt mixture realized the best cracking resistance at low temperature and water damage resistance, which is consistent with the result of DSR and contact angle tests. FT-IR characterization confirmed the successful grafting of amino group onto graphene oxide and that graphite oxide was reduced to graphene. The fiber structure and successful grafting of aminated graphene onto the fiber surface in the PAN modified asphalt was further characterized and confirmed by SEM and AFM. [ABSTRACT FROM AUTHOR]