Preparation and characteristics of a recycled cement-based superhydrophobic coating with dirt pickup resistance  

作　　者：GUO LiPing SUN Wei YU Tao FENG MuZai 

机构地区：[1]School of Materials Science and Engineering, Southeast University [2]Collaborative Innovation Center for Advanced Civil Engineering Materials [3]Jiangsu Key Laboratory of Construction Materials [4]Wuxi Communication Engineering Co., Ltd. [5]Department of Civil, Environmental and Architectural Engineering, The University of Kansas

出　　处：《Science China(Technological Sciences)》2015年第6期1096-1104,共9页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51378113 and 51438003);the National Basic Research Program of China("973"Project)(Grant No.2015CB655102)

摘　　要：We introduce a low-cost and effective technique that can transform waste cement-based dust into a superhydrophobic coating with dirt pickup resistance. An organic-inorganic hybrid superhydrophobic coating is prepared by the sol-gel method using methyltriethoxysilane as a precursor and waste cement-based dust as a film-forming material. Orthogonal experiments and a comprehensive scoring method were used to optimize the composition and production technologies. Our results show that this superhydrophobic organic-inorganic hybrid coating has an average static contact angle of 151.65° and low water adhesion. Related tests reveal that the dirt pickup resistance, washing resistance and film-substrate cohesion of this coating are also outstanding. The multi-scale physical and chemical mechanisms behind the properties of the coating are investigated. This recycled cement-based coating can be used as the external cover of engineering structures to protect them from corrosion.

关 键 词：recycled cement-based coating SUPERHYDROPHOBICITY dirt pickup resistance washing resistance film-substrate cohesion multi-scale mechanisms 

分 类 号：TQ630.1[化学工程—精细化工]