环氧树脂偶联纳米颗粒制备超疏水表面

Preparation of Superhydrophobic Surfaces Based on Epoxy Resin Coupled Nano-silica

利用激光加工在钛合金表面构建微米级粗糙结构,采用环氧树脂溶液和纳米二氧化硅分散液对该表面进行涂覆处理,对得到的微/纳分级粗糙表面进行全氟硅烷修饰,得到具有超疏水性的复合膜层,并采用扫描电子显微镜、三维形貌仪、接触角测量仪评价膜层的形貌结构和润湿性。结果表明,激光加工构建的微米级结构和纳米二氧化硅颗粒组成的微/纳二元粗糙结构对超疏水表面的构建具有重要作用;复合膜层表面的接触角随二氧化硅分散液溶度的提高呈现先增加后减小趋势,并最终逐渐稳定在150°左右;在二氧化硅分散液溶度为12.0g/L时,复合表面的接触角最大,可达159(°)。

Micron scale rough structures of titanium alloy substrate were acquired by laser manufacturing. Nanoscale rough structures were prepared by painting epoxy acetone solution and silica suspension subsequently. Superhydrophobic duplex-treated film was fabricated by perfluorodeeyltrichlorosilane self-assembled monolayers deposited on micro-nano structures. Surface profiler, scanning electron microscope, and contact angle measurement were used to analyze the surface properties, and wettability of the specimens. It showed that micronano structures by laser manufacturing and nano-silica play an important role in preparing superhydrophobic surfaces. Contact angles on duplex-treated film increased initially and then decreased with increasing concentration of silica suspension, and finally stabilized at around 150 °. The maximum contact angle of 159° was acquired when the concentration of silica suspension was 12.0 g/L.