气流湍流颗粒表面改性处理方法及改性剂吸附机理研究  

Study of Technology for Powder Surface Modification by Turbulent Air and Adsorption Mechanism of Silane Coupling Agent

作　　者：蔡楚江[1] 沈志刚[1] 邢玉山[1] 麻树林[1] 

机构地区：[1]北京航空航天大学粉体技术北京市重点实验室,北京100083

出　　处：《过程工程学报》2006年第z2期179-182,共4页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:50474001);北京市教育委员会共建项目建设计划(编号:SYS10006041)

摘　　要：采用气流湍流方法对二氧化硅颗粒进行表面改性处理,通过对其表面进行红外光谱研究,分析了其与有机基体的相容性,结果表明,采用气流湍流改性方法处理后的二氧化硅颗粒表面包覆了一层偶联剂分子,改善了与有机基体的相容性.为了研究KH-550的吸附机理,采用原子力显微镜和接触角测量仪对硅烷偶联剂在二氧化硅基片表面吸附的过程进行了实验研究:二氧化硅基片表面粗糙度随着处理时间的增加而增加,对水的接触角随处理时间的增加先增加而后趋于稳定,其表面由亲水性表面变为疏水性表面.The technology for powder surface modification by turbulent air was investigated by modifying the quartz powder,and Fourier transform infrared spectroscopy(FTIR) was used to study the changes of the quartz powder before and after surface modification.In order to study the adsorption mechanism of silane coupling agent,quartz substrate was used for silane deposition.The surface topography and the wettability of silane-treated substrate were investigated by atomic force microscopy(AFM) and static water contact angle measurement techniques.With increasing the time of adsorption,the surface of the silane-treated substrate become rougher and the static water contact angle of the silane-treated substrate increases firstly and then remains stable.The character of the substrate surface is changed from a hydrophilic one to a hydrophobic one after silane adsorption.

关 键 词：表面改性 硅烷偶联剂 原子力显微镜 润湿性 

分 类 号：O634.4+1[理学—高分子化学]