摘要：为了提高磷酸铝与有机物的相容性,利用固相法对磷酸铝粉体进行表面疏水改性,采用傅里叶红外光谱、热重分析和热场发射扫描电子显微镜等测试手段对改性前、后粉体的性质以及改性机理进行分析。结果表明,在80℃恒温水浴下,经质量分数为6%的硅烷偶联剂改性后,磷酸铝粉体的活化指数达到99%以上,与水的接触角约为130°;200℃热处理2 h后,偶联剂对粉体表面的改性方式由物理吸附转变为化学吸附,活化指数达到100%,与水的接触角提高为145°左右。

关键词：磷酸铝；固相法；硅烷偶联剂；表面疏水改性

Abstract：To improve compatibility of aluminum phosphate and organics,the surface hydrophobic modification of aluminum phosphate powders were researched by solid-state method.The properties of aluminum phosphate powders before and after modification as well as the modification mechanism were analyzed by the test means of FTIR,TG and TFSEM.The results indicate that at thermostatic water bath of 80 ℃,the activation index of aluminum phosphate powders is more than 99% after modified by silane coupling agent with the mass fraction of 6%.The static water contact angle is about 130°.After heated at 200 ℃ for 2 h,the modifying method is transformed from physical adsorption to chemical adsorption.The activation index increases to 100% and the static water contact angle reaches 145°.

Keywords：aluminum phosphate;solid-state method;silane coupling agent;surface hydrophobic modification