摘要
以正硅酸四乙酯(TEOS)为前驱体,盐酸和氨水作为催化剂,通过溶胶-凝胶法制备了SiO2醇凝胶,再利用三甲基氯硅烷(TMCS)和正己烷(Hexane)对醇凝胶进行表面改性,最后在常压条件下干燥后制备了疏水性SiO2气凝胶。采用X射线衍射、扫描电镜(SEM)、比表面积测试(BET)、傅里叶转换红外光谱(FT-IR)等测试方法对所得样品的形貌、结构及化学组成等进行了分析。结果表明,所得SiO2气凝胶比表面积可达900m2/g以上,密度<200kg/m3,并且具有优异的疏水性。
Hydrophobic silica alcogels were prepared with tetraethylorthosilicate(TEOS)as precursor,hydrochloric acid and ammonia as catalysts,and trimethylchlorosilane(TMCS)and hexane as a surface modifying agent by drying at ambient pressure.Test methods,such as X-ray diffraction,SEM,BET,FT-IR were adopted to analyze the surface morphology,structure and chemical composition of the samples.The results show that the specific surface area of the resulting SiO2 aerogels is up 900m2/g.The areogels have a density less than 200kg/m3,and the hydrophobicity of aerogels is excellent.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2015年第5期5132-5135,共4页
Journal of Functional Materials
基金
江苏省博士后科研资助项目(1301034C)
河南省高等学校矿业工程材料重点学科开放实验室开放课题资助项目(MEM13-11)
