文献类型：期刊文献

英文题名：A Facile and Low Cost Fabrication Method for Surface Hydrophobic Modification of Gypsum Building Materials

作者：Ran, Jingyu Chen, Jiajun Su, Xiangdong Zhang, Jie Wei, Chao Wei, Wang

第一作者：冉景榆

机构：[1] Guizhou Phosphogypsum Institute, Guizhou Institute of Technology, Guiyang, 550003, China; [2] Key Laboratory of Light Metal Materials Processing of Guizhou Province, Guizhou Institute of Technology, Guiyang, 550003, China

第一机构：贵州理工学院

年份：2021

外文期刊名：SSRN

收录：EI(收录号：20210408101)

语种：英文

外文关键词：Building materials - Coatings - Contact angle - Costs - Energy conservation - Fabrication - Fourier transform infrared spectroscopy - Gypsum - Scanning electron microscopy - Surface chemistry - Water absorption - Wear resistance - X ray photoelectron spectroscopy

摘要：Gypsum is a typical healthful, eco-type and energy-saving material. However, because of poor water resistance, its applications were limited. To improve the water resistance of gypsum building materials, herein, we use a facile and low cost fabrication method via ultrasonic vortex oscillation reaction after mixing octadecyltrichlorosilane (OTS) with 1,2-dichloroethane to prepare hydrophobic coating. We show that water drop can be stable on its surface and reach the highest contact angle 144.70±1.1°, the softening coefficient is 0.92, the water absorption is reduced to 1.1%. The morphologies and chemical composition were characterized by means of scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FI-IR) and X-ray photoelectron spectroscopy (XPS). In addition, the wear resistance of hydrophobic surface were assessed by the rubbing with 600 mesh sandpaper for 12 times (20 cm each time) under the pressure of 4.4 KPa, the surface still has hydrophobicity. Such a hydrophobic coating shows promising potential as large-scale gypsum product protection. ? 2021, The Authors. All rights reserved.