Fabrication of Bio-inspired Surfaces with Hierarchical Structure and Superwetting Performance for Anti-icing Application
Anti-icing surfaces have attracted peoples attention because its of paramount importance for the aircraft industries as well as residential activities in low temperature environment.Generally appropriate chemistry of surface or wettability and specific morphological characteristics for coatings were proved to be decisive for anti-icing surfaces to delay droplet nucleation and reduce the ice accumulation.And from now therere no detailed research how to design or adjust surface to obtain perfect anti-icing performance under different extreme environment,while bio-inspired surfaces were gradually designed extensively for anti-icing application,for instance,superhydrophobic surface inspired by the self-cleaning effect of Lotus leaf and super-lubricating surface inspired by the lubricating Nepenthes.Especially,superwetting surfaces based on bio-inspired fabrication showed excellent properties in complicated environment owing to particular micro-or-nanoscale roughness and materials with low surface free energy.In this paper,we displayed three different superwetting surfaces based on bionics principle: the first surface(superhydrophobic surface,SOS)utilized spray painting method to form special micro-nanostructure and the coating was manufactured by multifunctional magnetic hybrid polymer with amino modified Fe3O4 nanoparticles,which could delay the water freezing time to 2700s and ice adhesion strength was 296.5KPa.The second surface(superhydrophilic surface,SIS)was made by polyamidoamine film grafted by acidic SiO2 nanoparticles and crosslinked by glycidyl ether.The SIS surface could reduce the amount of accumulate ice about 42.2%respected to general surfaces,and the freezing time could depressed to 500s at-10℃.The last surface(slippery liquid-infused porous surface,SLIPS)was engineered by infusion of fluorinated lubricant(Perfluoropolyether)in sol-gel-derived nanocomposite.The storage capacity of lubricant was intensified by the abundant internal cross-linked networks and the nanoscale textures of the surface.SLIPS could depress the crystallization point of water to-17℃ meanwhile the adhesion strength decreased to 0.1N on the slippery surface.In addition,the three superwetting surfaces have performed favourable anti-icing effects,but the bio-inspired mechanisms and methods of fabrication make a great difference,which brought out prominent comparison about anti-icing advantage under extreme condition.However,the different mechanisms could clarify how to adjust the wettability and roughness of surface for excellent anti-icing effect and the theories could be applied to select applicable surface in complex situations,which will be promising to make progress on how to manufacture a perfect surface under any environment.
superwetting bio-inspired anti-icing super-hydrophobic
WANG Qiangfeng ZHANG Qinghua ZHAN Xiaoli CHEN Fengqiu
Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology College of Chemical and Biological Engineering,Zhejiang University Zhejiang province,China
国际会议
重庆
英文
1-6
2017-09-25（万方平台首次上网日期，不代表论文的发表时间）