SiO_2气凝胶常压制备、表面结构与吸附性质  

Ambient Pressure Preparation,Surface Structure and Adsorption Properties of Silica Aerogels

作　　者：张志华[1] 倪星元[1] 陈世文[1] 周斌[1] 沈军[1] 吴广明[1] 王孝利[1] 吴越华[1] 

机构地区：[1]同济大学波耳固体物理研究所,上海200092

出　　处：《原子能科学技术》2005年第6期498-502,共5页Atomic Energy Science and Technology

基　　金：国家自然科学基金重点基金资助项目(20133040);国家高技术"863"计划资助项目(2003AA84ts03);上海市纳米科技与产业发展促进中心资助项目(0352nm056;0216nm035;0352nm022);上海市自然科学基金项目(02ZE14101);上海市科委中法合作项目(02SL001);上海市重点学科建设项目;教育部军品配套项目;教育部跨世纪优秀人才计划资助项目

摘　　要：采用溶胶-凝胶技术,以多聚硅(E-40)为源,通过表面修饰工艺,在常压条件下制备了SiO2气凝胶。采用扫描电镜1、3C和29Si核磁共振谱以及孔径分布仪对SiO2气凝胶的微结构进行了表征,并用微量电子真空吸附天平对SiO2气凝胶的吸附特性进行了研究。结果表明:SiO2气凝胶具有纳米多孔结构、较好的疏水和亲水可调性,是一种极好的高吸附材料。A method to prepare silica aerogels is described. Polyethoxydisiloxanes （E- 40） was used as silicon source and silica aerogels dried at ambient pressure were prepared via sol-gel process and surface modification. Scanning electronic microscopy （SEM）, ^13C, ^29Si nuclear magnetic resonance（NMR） spectra and pore size distribution measurement were used to characterize the morphology and pore structure of the silica aerogels. Super-micro electron balance in vacuum was used to determine the adsorption capacities of the silica aerogels. The results show that the silica aerogels with nanoporous structure, good adsorption properties, and adjustable hydrophobic and hydrophilic property are suitable for different adsorptive applications.

关 键 词：SIO2气凝胶 常压干燥 表面结构 吸附特性 

分 类 号：O648[理学—物理化学]