Synthesis and characterization of superhydrophobic magnesium oxysulfate whiskers  

作　　者：Zhenying Yao Lu Gong Chunmei Zhu Xin Lian Bai He Shenghui Tian Bo Yui 

机构地区：[1]School of Chemistry and Chemical Engineering,Chongqing University of Science and Technology,Chongqing,401331,China [2]Provincial and Ministerial Co-Constructive of Collaborative Innovation Center for MSw Comprehensive Utilization,School of Metallurgy and Materials Engineering,Chongqing University of Science and Technology,Chongqing,401331,China

出　　处：《Particuology》2023年第7期111-121,共11页颗粒学报（英文版）

基　　金：National Natural Science Foundation of China(grant No.21908012)and the Natural Science Foundation of Chongqing,China(grant Nos.cstc2020jcyj-msxmx0875 and CSTB2022BSXM-JSX0021)for the financial support to this work.

摘　　要：Superhydrophobic materials have attracted much attention for their special wettability.In this study.magnesium oxysulfate(MOS)whiskers were surface modified by vinyltrimethoxysilane(VTMS)and prepared as superhydrophobic materials,which are expected to be widely used in self-cleaning,corro-sion prevention,and oil-water separation.The factors of silane concentration,hydrolysis time,reaction temperature,and reaction time were investigated.The superhydrophobic Mos whiskers were synthe-sized.SEM and XRD turned out that there were no apparent changes in the morphology and crystalli-zation behavior of whiskers before and after modification,while the surface was uniformly coated with a layer of non-crystal material,and the surface of the whiskers employed a chemical bond Si-O-Mg covalently connected.The thermogravimetric analysis ultimately demonstrated that surface modification was beneficial to the improvement of the thermal stability of MoS whiskers.Superhydrophobic MoS whiskers showed good compatibility with organic solvents through oil-water separation experiments,and demonstrated excellent self-cleaning performance.The methodology for the surface treatment of Mos whiskers to prepare superhydrophobic whiskers in this work may be extended for other whiskers or fillers,which may be promising for the preparation of superhydrophobic materials.

关 键 词：Magnesium oxysulfate whiskers Surface modification VINYLTRIMETHOXYSILANE SUPERHYDROPHOBICITY 

分 类 号：TG146.22[一般工业技术—材料科学与工程]