硅源对介孔SiO_2空心球结构的影响  

Influence of silica source on the structure of mesoporous silica hollow sphere

作　　者：刘慧[1] 李洪亮[2] 朱伶俐[1] 蒋郭晶[1] 房洪杰[1] 孙杰[1] 

机构地区：[1]烟台南山学院工学院,烟台265713 [2]青岛大学化学化工与环境学院,纤维新材料与现代纺织国家重点实验室培育基地,青岛266071

出　　处：《化工新型材料》2016年第8期135-137,共3页New Chemical Materials

基　　金：国家“973”计划项目(2012CB722705);国家高技术研究发展计划(2012AA110407,2014AA052303)

摘　　要：以低度交联的三聚氰胺甲醛（MF）微球为高分子模板剂,采用正硅酸四乙酯（TEOS）和Ludox AS-40硅溶胶2种硅源,分别经溶胶-凝胶法和静电自组装法,制备了T-MF@SiO_2和A-MF@SiO_2核-壳结构复合微球,再辅助高温煅烧模板法除去MF高分子微球,成功制备了T-SiO_2和A-SiO_2空心球。利用扫描电子显微镜（SEM）、透射电镜（TEM）、傅里叶红外光谱仪（FT-IR）、比表面积孔径分布测定仪（BET）等手段对样品的形貌、结构和组分进行了表征和比较,同时,对介孔SiO_2空心球的形成机理也进行了探讨。结果表明：T-SiO_2空心球和A-SiO_2空心球的粒径尺寸在300~400nm,比表面积分别为425m2/g和297m2/g,两者在壳层的完整性、孔径分布的均一性方面存在差异。Using low cross-linked melamine formaldehyde（MF） microspheres as the polymer template agent and tet- raethyl orthosilicate（TEOS） or Ludox AS-40 silica colloid as silica source,T-MF@SiO2 or A-MF@SiO2 core-shell struc- ture composite microspheres were prepared via sol-gel process or electrostatic self-assembly method. T-SiO2 spheres or A-SiO2 spheres were obtained by calcining MF polymer microspheres in air. The morphology,structure and composition of SiO2 spheres were characterized and compared by various analytic techniques such as SEM, TEM,FT-IR and BET. Mean- while,the formation mechanism of spheres was discussed. The results showed that T-SiO2 and A-SiO2 spheres were about 300 to 400nm in particle size, BET surface areas of approximately 425 and 297mZ/g, respectively. In addition, these two spheres existed obvious differences in the integrity of shell and pore size distribution.

关 键 词：溶胶-凝胶法 自组装法 SiO_2 模板法 空心球 

分 类 号：TQ127.2[化学工程—无机化工] TB383.4[一般工业技术—材料科学与工程]