K_2SO_4辅助混合模板剂制备大孔-中孔SiO_2微球  

PREPARATION OF MACRO-MESOPORE SiO_2 MICROSPHERES WITH A MIXED TEMPLATE UNDER ASSOCIATION ACTION OF K_2SO_4

作　　者：熊洁羽[1] 翟峥[2] 朴香兰[2] 骆广生[2] 

机构地区：[1]江苏技术师范学院化学化工系,江苏常州213001 [2]清华大学化学工程系化学工程国家重点实验室,北京100084

出　　处：《硅酸盐学报》2010年第11期2099-2104,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(20676066)资助项目

摘　　要：采用三嵌段聚合物F127、聚乙二醇和甲基纤维素为混合模板剂,以正硅酸乙酯为原料,无机盐K_2SO_4为添加剂,利用液-液微分散技术制备SiO_2微球。用透射电镜、扫描电镜、N_2吸附-脱附、X射线衍射及红外光谱对微球进行了表征。研究了混合模板剂的质量比、水解时间及K_2SO_4的量对于微球结构的影响。结果表明:无机盐的加入可有效调节微球的孔结构,得到的微球球形度和单分散性好,具有大孔-中孔孔结构,孔容可以达到4mL/g。Using tri-block polymer,polyethylene glycol and methylcellulose as mixed templates,tetraethyl orthosilicate as material, inorganic salt K_2SO_4 as additive,macro-mesoporous and monodisperse SiO_2 microspheres were prepared by using liquid-liquid microdispersion technology.The silica microspheres were characterized by nitrogen adsorption and desorption,X-ray diffraction,transmission electron microscopy,scanning electron microscope and infrared spectrum.The effect of mass ratio of mixed templates,hydrolysis time and addition amount of inorganic salts K_2SO_4 on the microspheres structure were studied.The results show that addition of inorganic salts can regulate the pore structure of silica microspheres effectively,the microspheres obtained by addition of inorganic salts have good monodispersity and sphericity.The silica microspheres have macro-mesopore structure with pore volume of 4 mL/g.

关 键 词：二氧化硅微球 微流体技术 混合模板剂 无机盐 

分 类 号：O611.4[理学—无机化学]