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《China Powder Science and Technology》 2012-03
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Hydrophobic Modification of Chromium Sesquioxide with Stearic Acid

LUO Shuang,HUO Jichuan,LEI Yonglin, LIU Zhenghai,ZOU Dejun(State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials,Southwest University of Science and Technology,Mianyang 621010,China)  
The surface modification of chromium sesquioxide by stearic acid was investigated,and the results of the modification were characterized by means of the determination of activation index,angle of contact and FT-IR,XRD,TG-DSC.The results show that the optimum technical condition is 2% in dosage,80℃ in temperature and 40 min in time.The stearic acid molecules adsorb on the surface of chromium sesquioxide chemically,and new bonds form.The surface modification do not destroy the crystal structure of chromium sesquioxide.The contact angle of the modified chromium sesquioxide with water is 145°,which indicates that the surface of chromium sesquioxide changes from hydrophilic to hydrophobic after stearic acid modification.
【Fund】: 国家高技术研究发展计划(863计划)项目 编号:2009AA035002
【CateGory Index】: O614.611
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