Construction of Renewable Superhydrophobic Surfaces via Thermally Induced Phase Separation and Mechanical Peeling  

基于热致相分离法和机械撕除技术的可再生超疏水表面构建

作　　者：朱琪[1] 虞源 吴青芸[1] 顾林 

机构地区：[1]宁波大学材料科学与化学工程学院,宁波315211 [2]中国科学院宁波材料技术与工程研究所,中国科学院海洋新材料与应用技术重点实验室,宁波315201

出　　处：《Chinese Journal of Chemical Physics》2017年第2期219-224,I0002,共7页化学物理学报（英文）

基　　金：This work is supported by the National Natural Science Foundation of China （No.51403107）, the Natural Science Foundation of Ningbo （No.2015A610014）, the Key Laboratory of Marine Materials and Related Tech- nologies （No.2016K07）, and K. C. Wong Magna Fund in Ningbo University.

摘　　要：We report a simple preparation method of a renewable superhydrophobic surface by thermally induced phase separation （TIPS） and mechanical peeling. Porous polyvinylidene fluoride （PVDF） membranes with hierarchical structures were prepared by a TIPS process under different cooling conditions, which were confirmed by scanning electron microscopy and mercury intrusion porosimetry. After peeling off the top layer, rough structures with hundreds of nanometers to several microns were obtained. A digital microscopy determines that the surface roughness of peeled PVDF membranes is much higher than that of the original PVDF membrane, which is important to obtain the superhydrophobicity. Water contact angle and sliding angle measurements demonstrate that the peeled membrane surfaces display super- hydrophobicity with a high contact angle （152°） and a low sliding angle （7.2°）. Moreover, the superhydrophobicity can be easily recovered for many times by a simple mechanical peeling, identical to the original superhydrophobicity. This simple preparation method is low cost, and suitable for large-scale industrialization, which may offer more opportunities for practical applications.

关 键 词：SUPERHYDROPHOBICITY Polyvinylidene fluoride PEELING REGENERATION Thermally induced phase separation 

分 类 号：O[理学]