Preparation and Characterization of Hydrophobic Silica Aerogel by Ambient Pressure Drying Method

摘要：

　　Silica aerogel has been prepared by ambient pressure drying technique using water glass as starting materials.Solvent exchange and surface modification were simultaneously conducted by immersing the wet hydrogel in EtOH/TMCS(Tri Methyl Chloro Silane)/hexane solution.The silica aerogel was obtained with the density of 0.110g·cm-3 and 95.2% porosity.The specific surface area of the silica aerogel was 472.5m2·g-1 with a average pore size distribution of27.5nm.FT-IR spectrum analysis showed that the surface of the silica aerogel was modified by Si-CH3 groups,which allowed the aerogel to be hydrophobic.

关键词： Aerogel Water glass Porosity Hydrophobicity

作者: Hui Xu Guilin Fu Yuqiang Guo Jingchun Tu Yong Chen

作者单位: Key Laboratory of Tropical Biological Resources of Ministry of Education;Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources;Ministry of Education Key Laboratory of Application Technology of Hainan Superior Resources Chemical Materials,Hainan University,Haikou,Hainan,570228,P.R.China

会议类型: 国际会议

会议名称: 3rd International Conference on Testing and Evalution of Inorganic Materials(第三届无机材料测试与评价学术年会(TEIM2012))

会议地点: 景德镇

会议语种:英文

页码: 144-147

在线出版日期: 2012-10-15（万方平台首次上网日期，不代表论文的发表时间）