文献类型：期刊文献

英文题名：Superhydrophobic film from silicone-modified nanocellulose and waterborne polyurethane through simple sanding process

作者：Zhan, Xun[1] Chen, Jian[1] Yang, Zhaozhe[1] Wu, Guomin[1] Kong, Zhenwu[1]

第一作者：Zhan, Xun

通信作者：Wu, GM[1]

机构：[1]Chinese Acad Forestry, Natl Engn Res Ctr Low Carbon Proc & Utilizat Fores, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Inst Chem Ind Forest Prod,Key Lab Biomass Energy &, Nanjing 210042, Jiangsu, Peoples R China

年份：2023

卷号：232

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;Scopus(收录号：2-s2.0-85146664150);WOS:【SCI-EXPANDED(收录号:WOS:000972864600001)】；

语种：英文

外文关键词：Cellulose nanocrystal; Superhydrophobic; Waterborne polyurethane; Silicone; Sanding

摘要：How to improve the water and pollution resistance of films has been a major stumbling block in applications of waterborne coatings. To solve this problem, a new strategy was developed to construct waterborne superhydrophobic polyurethane composite films by modifying cellulose nanocrystal (CNC) with polysiloxane and doping the modified CNC into waterborne polyurethane (WPU). The super-hydrophobic functionalization with a water contact angle >150 degrees was achieved by simple sanding. The effects of CNC on the morphology, thermal, mechanical, and hydrophobic properties of the obtained superhydrophobic composite films were investigated. The simple sanding process formed a large number of rough porous structures on the surface of the film, which improved the superhydrophobic properties of the film. And after 30 sanding cycles, the film still had excellent hydrophobicity (water contact angle >150 degrees). This easy and effective method for the preparation of superhydrophobic films has great practical application value in the area of waterborne coatings.