Da Teng,Wenxiang Zheng,Lei Wu,Ghulam Murtaza,Zihui Meng,Lili Qiu
Formaldehyde and other harmful gases cause environmental pollution and threaten human health. Environment-friendly coatings is an effective strategy to address these environmental and health concerns. In this study, a large-scale amorphous photonic crystals (APC) based on modified ZIF-8 (H xh -ZIF-8) with photocatalytic degradation of formaldehyde and tunable structural color were designed for eco-friendly coatings by programmable smart manufacturing. As APC unit, H xh -ZIF-8 nanoparticles with controllable diameters were synthesized utilizing solvothermal method and the −N = C = O group was introduced with thermal oxidation. The results of photocatalytic degradation revealed that H 5h -ZIF-8, through thermal oxidation, exhibited a formaldehyde degradation rate 9.8 times than that of ZIF-8. The main reactive components in photocatalysis were holes (h + ) and superoxide radicals ( · O 2 – ), showcasing both stability and reproducibility. The color and brightness of the APC were adjusted by tuning the H xh -ZIF-8 diameter. The angle-independent APC ranging from red to purple were fabricated with 177, 165 and 235 nm H xh -ZIF-8 nanoparticles in various proportions with programmable smart manufacturing. In this study, a large-scale ZIF-8-based APC was designed with programmable smart manufacturing for environment-friendly coating, which combined environmental protection technology with structural color, and paved a new strategy for the development of multifunctional materials in air quality management.
Fluorine-containing coatings play an essential role in waterproof paint, but the harm of fluoride to the environment does not meet the current environmental protection requirements. The present study reports an eco-friendly and fluoride-free waterproof hybrid coating prepared by a semi-continuous seed emulsion method employing vinyl tributbutoxy silane (VTBS) as the functional monomer and octyl triethoxysilane modified SiO 2 (OTES@ SiO 2 ) as the inorganic filler. In vinyl acetate/butyl acrylate hybrid coatings, the surface covering of OTES@SiO 2 and the cross-linking structure produced by VTBS not only significantly improve the thermal stability, mechanical properties, and strong hydrophobicity but also reduce the water absorption. In addition, the gloss loss of the organic–inorganic hybrid layer is <30% after being exposed to UV-irradiation for 720 h. The obtained coating could be a lovely environmental-friendly protective coating for many functional areas, especially for outdoor applications.
危险品化学品经营许可证（带存储）