球磨法疏水改性高岭土及其性能研究  

Hydrophobic modification and performance of kaolin via ball-milling method

作　　者：颜慧琼[1] 陈秀琼[1] 朱祺东 李嘉诚[2] 胡德平[1] 张雪琴[1] 戴子豪 林强[1] 

机构地区：[1]海南师范大学化学与化工学院,海口571100 [2]海南大学材料与化工学院,海口570228

出　　处：《化工新型材料》2016年第6期166-168,共3页New Chemical Materials

基　　金：国家自然科学基金(21366010;21566009);海南省重点科技计划(ZDXM2014037;ZDXM20120003);海南师范大学2015年研究生创新科研项目(Hsyx2015-45)

摘　　要：以聚（甲基氢硅氧烷）（PMHS）作为疏水改性剂,采用球磨法对高岭土进行疏水改性,制备具有高疏水性能的改性高岭土。通过激光粒度和Zeta电位分析仪、接触角测量仪、FT-IR、SEM、TEM、XRD、DSC对改性后的高岭土进行了表征。结果表明,在球磨机械力作用下,高岭土的粒径和Zeta电位分别由1237nm和-28.12mV降至439nm和-10.53mV,晶型结构遭到破坏。高岭土的接触角由0°迅速增长为130-144°,表现出较强的疏水性能。PMHS以物理吸附或化学吸附的方式覆积于高岭土的表面,以提高热稳定性能。In order to enhance kaolin＇s affinity to the hydrophobic organic molecules for widen its using fields,the modified kaolin with high hydrophobic properties was prepared by ball-milling method,using poly（methyl hydrosiloxane）（PMHS）as a hydrophobic modifier.The modified kaolin was characterized by laser particle size and zeta potential analyzer,contact angle measurement,FT-IR,SEM,TEM,XRD and DSC.Experimental results showed that both particle size and zeta potential of kaolin respectively decreased from 1237 nm and-28.12 mV to 439 nm and-10.53 mV under the mechanical action of ball-mill,thus destroying the crystal structure of kaolin.The contact angle of kaolin was increased from 0°to 130-144°during the modification process,which showed strong hydrophobic properties.The PMHS was absorbed onto the surface of kaolin via physical adsorption or chemical adsorption,improving its thermal stability.

关 键 词：高岭土 聚(甲基氢硅氧烷) 疏水改性 球磨法 接触角 

分 类 号：TD985[矿业工程—选矿]