A facile route to obtain binary micro-nano roughness on composite coating surface

作者：Feng, Yefeng; Xu, Zhichao; Peng, Cheng^*; Huang, Hongpu; Hu, Jianbing

来源：The European Physical Journal - Applied Physics, 2018, 82(2): 21302.

DOI：10.1051/epjap/2018170209

• SUPERHYDROPHOBIC SURFACES
• RECENT PROGRESS
• FABRICATION
• NANOSTRUCTURES
• WETTABILITY
• ROBUST

Binary micro-nano rough morphology or structure shows a significant influence on hydrophobicity and icing-resistivity of the surface of coating materials. The leading cause for the classic Cassie state superhydrophobicity is the high area fraction of micro/nano air mattresses being in direct contact with a measured droplet. In this work, the dependence of static hydrophobicity on weight content of commercial surface-hydrophobicity-modified nano-silica in fluoropolymer-based composite coatings has been investigated in detail via detecting static water contact angle (CA). It was found that elevating the weight content of hydrophobic nano-silica could contribute to a higher surface roughness, a more compact binary micro-nano morphology and a larger area ratio of air mattresses due to a stronger hypothesized phase separation. As a result, the remarkably improved water CA of composite coatings far higher than the neat polymer coating was observed relying on coating composition. Fortunately, the maximum static water CA of 167 degrees was obtained in composite coating loaded with 50 wt% of hydrophobic nano-silica. For gaining the desired high comprehensive performances, it was advised to introduce 30 wt% of nano-filler into polymer. This work might open a facile route to achieve the promising superhydrophobic and anti-icing materials.

• 出版日期2018-8-15
• 单位长江师范学院; 江西师范大学