环境材料与生态化学研究发展中心知识库

It is very challenging to create bioinspired superamphiphobic 3D porous materials that resist wetting of organic liquids with low surface tension. Here, preparation of superamphiphobic, magnetic, and elastic (SAME) silicone sponges is reported with excellent temperature stability. The SAME silicone sponges are prepared by hydrolytic condensation of methyltrimethoxysilane and dimethoxydimethylsilane in the presence of urea, n-hexadecyltrimethyl ammonium bromide, and the Fe₃O₄@SiO₂ nanoparticles, followed by surface modification with 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES) and tetraethoxysilane (TEOS). The SAME silicone sponges are characterized using a wide range of analytical techniques including scanning electron microscopy, X-ray photoelectron spectroscopy, and thermal gravimetric analysis. It is found that the wettability of the SAME silicone sponges can be controllable simply by regulating their surface topography and surface chemical composition, in other words, the volume ratio of PFDTES and TEOS. The residual silanol groups on the pore surface of the silicone sponge act as the active sites for the hydrolytic condensation of PFDTES and TEOS. The SAME silicone sponges feature excellent superamphiphobicity for water and various organic liquids of low surface tension, fast magnetic responsiveness, high compressibility (90%), and stretchability (35%) as well as high stability in a wide range of temperature (−196–300 °C).