Sprayable coating based on fluorinated silica nanocomposites with superhydrophobic and antibacterial properties for advanced concrete
Sprayable coating based on fluorinated silica nanocomposites with superhydrophobic and antibacterial properties for advanced concrete作者机构：Key Laboratory of Advanced Technology of Materials (Ministry of Education of China) Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle (Ministry of Education of China) School of Materials Science and Engineering Southwest Jiaotong University Superconductivity and New Energy R&D Center Southwest Jiaotong University School of Civil Engineering Southwest Jiaotong University State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Oncology Department The Second People's Hospital of Neijiang
出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))
年 卷 期：2022年第32卷第4期
页 面：472-481页
核心收录：
学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学]
基 金：financially supported by National Natural Science Foundation of China (51271155, 51377138) the Science and Technology Planning Projects of Sichuan Province (2019YFG001 2020YJ0086) National Key Research and Development Plan (2017YFE0301401) Sichuan Province Science Program (2017JY0057, 2018JY0003) Directional Financial Transfer Payment Innovation and Development Technology Project (2018GZYZF0048) Special Fund Project of Municipal Science and Technology Incubation and Achievement Transformation (2018KJFH016)
主 题：Superhydrophobic Ultra-light Antibacterial Coating Concrete
摘 要：The porous hydrophilic nature of concrete structures makes them highly susceptible to chemical attack and bacterial adhesion, and the durability of concrete structures gradually decreases. In this work, a kind of sprayable coating with superhydrophobic and antibacterial properties was developed, which was used for surface engineering of concrete via the hydrophilic property of concrete and capillary action. The treated surface of concrete exhibited significant superhydrophobicity, with a static water contact angle of 162.4°and a sliding angle of 5°.The water absorption values of the treated concrete samples in merged in deionized water and 3.5 wt% Na Cl solution for 7 days were measured as 1.85% and 2.71%, indicating the enhancement of water repellency by 72.03% and 80.11%, respectively. The antibacterial characterization revealed that the superhydrophobic coating enabled significantly reduced adhesion of bacteria, with the antibacterial rates of 84.57 ± 2.5% for E. coli and 90.43 ± 1.6% for S. epidermidis, respectively. The superhydrophobic coating provides hydrophobic protection for porous substrate structures and effectively reduce the corrosion damage of substrate materials, which is of practical significance for improving the durability of concrete structures.
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