高等学校化学学报Issue(9)：1655-1660,6.DOI:10.7503/cjcu20150246
毫米级轻质高强度多孔二氧化硅球的制备与表征
Preparation and Characterization of Strong-lightweight Porous Silica Spheres in Millimeter Scale
摘要
Abstract
Strong-lightweight porous silica spheres in millimeter scale were synthesized using cationic surfac-tant hexadecyltrimethyl ammonium bromide ( CTAB ) and nonionic surfactant F127 as templates, tetraethyl orthosilicate(TEOS) as silica source in liquid paraffin/water(W/O) system via self-assembly. The samples were characterized by means of laser particle size analyzer, scanning electron microscopy( SEM) , transmission electron microscopy( TEM) , nitrogen adsorption-desorption measurments and nanoindentor. The results indi-cate that spheres with diameter of (1. 4±0. 2) mm are obtained, the hierarchical pores with the size from 2 nm to tens of nanometers are within the samples, and the BET surface area of the sample is 498. 00 m2/g. In ad-dition, the bulk density of the sample is just 0. 44 g/cm3 , but its hardness is up to 549. 00 MPa and elasticity modulus sums up to 9. 19 GPa.关键词
毫米级二氧化硅球/轻质高强度二氧化硅/液体石蜡/水体系Key words
Porous silica spheres in millimeter scale/Strong-lightweight silica/Liquid paraffin/water system分类
化学化工引用本文复制引用
李娃,李凤云,史志胜,黄珏,蔡强,张伟..毫米级轻质高强度多孔二氧化硅球的制备与表征[J].高等学校化学学报,2015,(9):1655-1660,6.基金项目
国家科技支撑计划项目(批准号:2012BAⅠ17B04)和国家“九七三”计划项目(批准号:2013CB932803)资助 （批准号:2012BAⅠ17B04）
