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Fluorocarbon polyurethane amino baking paint for graffiti-resistant whiteboards was designed and prepared. Firstly, perfluorohexylethyl alcohol (TEOH6) and hexamethylene diisocyanate (HDI) were reacted under certain conditions to obtain fluorocarbon mono-isocyanate, then fluorocarbon diols were obtained by reacting with trimethylolpropane, and finally fluorocarbon polyurethane hydroxy resin was formed by reacting with hexamethylene diisocyanate (HDI) and polyester diols. The synthesized hydroxyl resin was used as the basis to configure fluorocarbon polyurethane amino baking paint for graffiti-resistant whiteboards and was upgraded by adding hydroxyl silicone oil. Secondly, a series of performance tests, such as hardness, adhesion, flexibility, and corrosion resistance, were conducted to verify that the baking paint possessed excellent properties for use on writing whiteboards. The graffiti resistance of each paint film was evaluated by different methods, and it was found that the graffiti resistance was mainly due to the excellent hydrophobicity and oleophobicity of the paint films after the enrichment of fluorocarbon chains on their surfaces, and the combined effect of low surface energy caused by hydroxyl silicone oil crosslinked with amino resin. This study provides a theoretical basis and technical support for the preparation of fluorocarbon polyurethane baking paint for graffiti-resistant whiteboards. [ABSTRACT FROM AUTHOR]

Traditional cancer therapies no longer meet the current demand for cancer precision therapy and personalized treatment and it's essential to develop new therapeutic modalities as well as to investigate new combination anti-tumor mechanisms. Therefore, amphiphilic prodrug polymer chains linking methoxy poly(ethylene glycol) (mPEG) and cinnamaldehyde (CA) with adipic acid dihydrazide (ADH) as the pH-responsive center were designed and synthesized, which could self-assemble into PAC micelles in aqueous solution. A supramolecular hydrogel was formed based on the host–guest interaction between α-cyclodextrin (α-CD) and PAC micelles. Polyetherimide (PEI) modified copper manganese sulfide nanoenzyme catalysts (PCMS NPs) were prepared by a solvothermal method, which could be uniformly dispersed in the hydrogel to form a composite supramolecular hydrogel (PCMS@PAC/α-CD Gel). Under an acidic tumor environment, pH-responsive hydrazone bonds were broken, resulting in the slow release of CA and the amplification of hydrogen peroxide (H2O2) levels. PCMS NPs exerted peroxidase (POD)-like activity and catalase (CAT)-like activity, which could convert H2O2 into hydroxyl radicals (˙OH) and oxygen (O2) to alleviate intra-tumor hypoxia and induce apoptosis, while exerting glutathione oxidase (GPX)-like activity to consume glutathione (GSH) to further enhance the effect of chemodynamic therapy (CDT). Under near-infrared light (NIR) irradiation, PCMS NPs exhibited an excellent photothermal conversion performance, which could rapidly increase the temperature of tumor cells to above 42 °C for photothermal therapy (PTT) and convert O2 to a superoxide anion (˙O2−) by exerting oxidase (OXD)-like activity for photodynamic therapy (PDT). It was demonstrated by in vitro and in vivo experiments that the PCMS@PAC/α-CD Gel was highly cytotoxic to cancer cells and could effectively inhibit tumor growth, indicating the potential for applications in the fields of biomedicine and smart materials. [ABSTRACT FROM AUTHOR]

The rapid progress in technology has led to widespread adoption of electronic devices. However, this increased usage has brought about concerns regarding both environmental impact and human health. As a result, there is a growing demand for the development of intelligent devices that can address both electromagnetic interference (EMI) shielding and effective thermal management simultaneously. In this work, we introduce a simple approach for the fabrication of flexible conductive phase change materials (FCPCMs). By combining hollow ZIF-67 (H-ZIF) nanoparticles with a high encapsulation efficiency alongside conductive carbon cloth, we found that the hollow nanoparticles provide excellent encapsulation capabilities. Unlike traditional PCMs, this FCPCM exhibits a unique ability to efficiently convert, store, and release heat energy when stimulated by both light and electricity. Furthermore, the distinctive composite structure of this material enables shape memory, allowing for an EMI shielding switch that responds to changes in temperature. This study not only contributes to the advancement of multifunctional flexible PCMs but also explores the convergence of thermal management and electromagnetic shielding, paving the way for further research and applications in this field. [ABSTRACT FROM AUTHOR]

Marble kitchen countertops and other natural stone surfaces are often stained by various food ingredients and contaminants during daily use and require frequent cleaning, which is time-consuming and leads to the wasting of water. If the surface is coated with a hydrophobic and oleophobic coating, food ingredient contamination becomes easier to wipe clean. Therefore, a UV-curable monomer with fluorocarbon branched chains was synthesized and added to UV-curable coatings in different ratios. The preferred formulation that meets the basic performance requirements of UV-curable coatings, and has the best hydrophobic and oleophobic properties, was designed and selected. The formulation was upgraded by adding a hydrofluoric ether (HFE) solvent. These upgraded formulations were tested for hydrophobicity and oleophobicity under various conditions. The addition of an HFE solvent improves the initial water and cetane contact angles of the paint film, as well as the water and cetane contact angles under various conditions. Moreover, the upgraded formulations have better stain resistance. The degree of hydrophobicity and oleophobicity improvement is positively correlated with the addition of an HFE solvent. The UV-curable fluorocarbon polyurethane coating has good adhesion on a marble surface that has been polished and primed. Due to the presence of TEOH-6 instead of PFOA, the low content of fluorocarbon functional groups effectively located on the film surface makes the coating quite stable and safe. [ABSTRACT FROM AUTHOR]

Effective pollutant removal with environmentally friendly materials has attracted considerable attention. Herein, macroporous polyHIPE-g-poly(glycidyl methacrylate)-β-cyclodextrin (a) was prepared via a combination of high-internal-phase emulsion (HIPE) polymerization, atom-transfer radical polymerization (ATRP), and ring-opening addition reaction techniques. Based on the PGMA brush, β-CD molecules were successfully grafted onto the surface of PHIPE. Characterization of the obtained material demonstrated a hierarchical porous structure and the successful grafting of β-CD. Attributed to the large surface area of the monolith and the host–guest molecular recognition between β-CD and BPA, the prepared PHIPE-g-PGMA-β-CD as a robust macroporous complex could effectively remove BPA from water. The removal efficiency was systematically investigated with varying the time and concentration. Moreover, the monolith could be reused by simply leaching and washing in methanol to elute BPA, displaying comparative regeneration efficiency after six cycles. The newly fabricated macroporous PHIPE-g-PGMA-β-CD has great potential application in BPA-contaminated water treatment and environmental protection. [ABSTRACT FROM AUTHOR]