羧基改性单分散二氧化硅纳米球的制备与表征  

Preparation and Characterization of Carboxyl-modified Monodisperse Silica Nanospheres

作　　者：郭庆中[1] 刘闯[1] 肖颖[1] 

机构地区：[1]武汉工程大学材料科学与工程学院,武汉430073

出　　处：《有机硅材料》2010年第4期207-210,共4页Silicone Material

基　　金：国家自然科学基金项目(基金号20904045);湖北省自然科学基金项目(2009CDB355)

摘　　要：以浓氨水为催化剂、四乙氧基硅烷(TEOS)为原料,利用Stober溶胶-凝胶法制得二氧化硅(SiO2)微球。粒度仪测试结果表明,SiO2微球粒径为30～100nm,其平均粒径随着催化剂用量的增加而增大。进一步用γ-氨丙基三乙氧基硅烷对SiO2纳米球进行表面改性,后与苯偏三酸酐反应,得到羧基改性的SiO2纳米球。利用TEM、FT-IR对羧基改性纳米球进行表征。结果表明,改性过程对SiO2纳米球的粒径无影响,羧基通过化学键结合在SiO2纳米球表面。Carboxyl-modified silica nanospheres were prepared with concentrated ammonia as catalyst and TEOS as the raw material by Stober sol-gel method. The results showed that the particle size of SiO2 microsphere particle size was 30 - 100nm. The average diameter of silica nanospheres increased with the increase of catalyst. Then the surface modification on SiO2 nanoparticles by aminopropyl triethoxysilane was carried out, afterwards it reacted with trimellitic anhydride, in the end carboxyl modified SiO2 nanopartieles were synthesized. The results showed that the modified process had no effect on the particle size of SiO2 nanoparticles, and carboxyl groups were bonded chemically on the surface of SiO2 nanoparticles .

关 键 词：二氧化硅 溶胶-凝胶法 纳米球 羧基改性 

分 类 号：TB383.1[一般工业技术—材料科学与工程]