【摘要】 为了制备一种超疏水涂层,先用六亚甲基二异氰酸酯（HDI）与羟基硅油（PDMS）反应合成了中间体H-PDMS,再让H-PDMS和环氧丙烯酸树酯（EA）反应,得到PDMS改性的环氧丙烯酸树脂（PEA）,之后与疏水型nmSiO₂共混涂膜,UV固化可制备出一种超疏水涂层。采用红外光谱、接触角测量仪、场发射扫描电子显微镜、百格测试仪等表征了接枝材料的化学结构,涂层的疏水性、附着力等。结果表明:硅烷链段成功地接枝到EA的侧链上,当H-PDMS添加量为80wt%,nm SiO₂添加量为30wt%时,制备的涂层表面具有明显的微纳二级粗糙结构,接触角可达155°,滚动角小于3°,且在铝片上具有优异的附着力和自清洁性能。更多还原

【Abstract】 Super-hydrophobic coatings are getting more and more attention from researchers because of their application in anti-icing, anti-corrosion, anti-static, oil-water separation, self-cleaning, etc. A novel modified epoxy acrylic resin（PEA） was synthesized from polydimethylsiloxane（PDMS）, hexamethylene diisocyanate（HDI） and epoxy acrylic resin（EA）, and then blended with nmSiO₂ to prepare superhydrophobic coating by UV curing. The chemical structure, hydrophobicity and adhesion of the grafted material were characterized by infrared spectroscopy, contact angle measuring instrument, field emission scanning electron microscope and 100-cell measuring instrument. The results show that the silane segments are successfully grafted onto the EA backbone, HDI plays the role of a spacer group in the side chain between the EA backbone and PDMS. When H-PDMS is 80 wt % of the epoxy acrylic resin and the solid content of nmSiO₂ was 30 wt %, the surface of the prepared coating has obvious micro-nano roughness structure, water contact angle is about 155°, slide angle is less than 3°. It also has excellent adhesion and self-cleaning properties on aluminum sheets substrates.更多还原