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Epoxy resin (EP) has attracted considerable attention in packaging, electronic devices, aerospace, and coatings fields owing to its remarkable chemical and physical performance. However, the inherent flammable performance and unfavorable brittle nature seriously restricted its application in sophisticated industry. Herein, an efficient reactive 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO)‐based flame retardant (DB‐DAD) was prepared by a facile "one‐pot" method. Due to their synergistic gas‐phase and solid‐phase flame‐retardant effects, DB‐DAD modified EP composites (EP/DB‐DAD composite) easily achieved UL‐94 V‐0 ratings, and an EP/DB‐DAD composite with a 0.32 wt% phosphorus content had an excellent (30.2%) limiting oxygen index. In addition, the amounts of heat and smoke decreased by 28.1% and 24.8%, respectively. Due to the introduction of long and flexible aliphatic chains, the EP/DB‐DAD composites exhibited satisfactory mechanical properties, the flexural and tensile toughness of EP/6% DB‐DAD were 82.5% and 62.2% higher than those of neat EP, respectively. Furthermore, EP/DB‐DAD composite showed good transparency (>85%) and favorable UV shielding performance. The EP/DB‐DAD composite with good comprehensive performance is extremely promising to accelerate EP application in high‐tech industries. [ABSTRACT FROM AUTHOR]

Fabricating wood‐plastic composites (WPCs) using recycled plastic and wasted biomass materials is one of the effective approaches to alleviate the global energy crisis and reduce carbon emission. However, the unsatisfactory mechanical properties and fire safety hazards significantly limit the application of WPCs. Herein, recycled high density polyethylene (R‐PE), bean dregs and intumesce flame retardant (IFR) were melt‐blended into flame‐retardant WPC by mechanochemical crosslinking. The results show that the as‐prepared WPC within 22 wt% IFR achieves a satisfactory UL‐94 V‐0 rating and a limiting oxygen index of 31.0%, exhibiting a 40%, 27.6%, and 16.4% reduction in peak heat release rate, total heat release and total smoke production respectively compared to controlled WPC. The results also revealed an unexpected improvement in the mechanical performance of WPCs using the strategy (elevation of 73.6% in the elastic modulus and 75.9% in the breaking elongation, respectively), which can be attributed to the improved interfacial compatibility between R‐PE, bean dregs and IFR. This work offers an innovative and feasible approach for fabrication of high‐performance fire‐retardant WPC based on recycling waste plastics and agriculture wastes, and contributing to the circular economy and sustainability in accordance with the greening strategy in the world. [ABSTRACT FROM AUTHOR]

Developing robust ultrahigh light absorption coatings has been a significant challenge, limited by the absorption‐adhesion tradeoff. Herein, a robust carbon‐based coating with omnidirectional broadband high absorption is designed and fabricated using a one‐step spray method. A novel rapidly cross‐linking resin is utilized as the binder to enhance adhesion. Beyond leveraging the intrinsic optical properties of carbon absorbents, the construction of a micro‐nano multi‐scale trapping structure is crucial for achieving high absorption efficiency in the coating. Innovatively, an inorganic matting agent is introduced to further diminish reflection by scattering incident light. The resulting ultrablack coating demonstrates good adhesion and an exceptionally high integral light absorption of 99.34% within the wavelength range of 1500–1800 nm, marking the highest reported value for binder‐incorporated spray coatings to date. This robust coating also exhibits outstanding thermal stability and resistance to vacuum thermal cycling and vibration. Furthermore, the application of the ultrablack coating via spraying is scalable and can be readily adapted to the surfaces or interiors of complex structural components made from diverse materials. The coating shows remarkable potential for solar energy harvesting and target stealth. This study presents a simple and efficient approach for developing robust ultrablack coatings suitable for widespread practical applications. [ABSTRACT FROM AUTHOR]