| 常压干燥制备SiO2气凝胶的研究 |
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| 引用本文： | 吕鹏鹏,赵海雷,刘欣,李兴旺.常压干燥制备SiO2气凝胶的研究[J].材料工程,2012(4):22-26. |
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| 作者姓名： | 吕鹏鹏 赵海雷 刘欣 李兴旺 |
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| 作者单位： | 北京科技大学材料科学与工程学院,北京,100083 |
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| 摘 要： | 以水玻璃为硅源,采用常压干燥制备了SiO2气凝胶。研究了老化时间、老化剂种类、干燥溶剂种类以及表面改性对SiO2气凝胶结构和性能的影响。结果表明:制得的SiO2气凝胶具有良好的疏水性,密度为0.082g/cm3,孔隙率为96.26%,比表面积达到585.4m2/g。采用扫描电镜(SEM)、傅里叶变换红外分析(FT-IR)、热重分析(TG)、差热分析(DTA)等对疏水型气凝胶的结构和性能进行了研究。
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| 关 键 词： | SiO2气凝胶 常压干燥 老化 溶剂置换 表面改性 |
Preparation of Silica Aerogel via Ambient Pressure Drying |
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| LU Peng-peng
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ZHAO Hai-lei
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LIU Xin
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LI Xing-wang.Preparation of Silica Aerogel via Ambient Pressure Drying[J].Journal of Materials Engineering,2012(4):22-26. |
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| Authors: | LU Peng-peng ZHAO Hai-lei LIU Xin LI Xing-wang |
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| Affiliation: | (School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China) |
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| Abstract: | Hydrophobic silica aerogel was prepared from commercial water glass via ambient pressure drying.The effects of aging times,aging agents,drying solvent categories and surface modification on the microstructure and properties of silica aerogel were investigated.The results showed that the density,porosity and specific surface area of the prepared silica aerogel were 0.082g/cm3,96.26% and 585.4m2/g,respectively.The structure and properties of hydrophobic silica aerogel were analyzed by scanning electron microscope(SEM),Fourier transform infrared spectra(FT-IR),thermogravimetric(TG) and differential thermal analysis(DTA). |
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| Keywords: | silica aerogel ambient pressure drying aging solvent exchange surface modification |
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