| SiO2气凝胶的溶胶-凝胶/共沸蒸馏法制备及表征 |
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| 引用本文： | 岳瑞丽,张志建,马荣,关怀民,童跃进.SiO2气凝胶的溶胶-凝胶/共沸蒸馏法制备及表征[J].福建师范大学学报(自然科学版),2011,27(2):81-86. |
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| 作者姓名： | 岳瑞丽 张志建 马荣 关怀民 童跃进 |
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| 作者单位： | 福建师范大学化学与材料学院,福建高分子材料重点实验室,福建,福州,350007 |
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| 摘 要： | 以工业水玻璃为硅源,采用溶胶-凝胶和共沸蒸馏的方法在常压下制备SiO2气凝胶,研究制备条件对SiO2气凝胶性能的影响.结果表明,当溶液体系的pH值为4.5,添加2 mL甲酰胺作为干燥控制化学添加剂(DCCA),并以正丁醇与凝胶中的水为共沸蒸发介质时,所制备的SiO2气凝胶具有典型的气凝胶结构特征,经分析SiO2气凝胶的...
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| 关 键 词： | 水玻璃 溶胶-凝胶法 干燥控制化学添加剂 共沸蒸馏 SiO2气凝胶 |
Preparation of SiO_2 Aerogel by Combining Sol-gel and Azeotropic Distillation Processes and Characterization |
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| YUE Rui-li,ZHANG Zhi-jian,MA Rong,GUAN Huai-min,TONG Yue-jin.Preparation of SiO_2 Aerogel by Combining Sol-gel and Azeotropic Distillation Processes and Characterization[J].Journal of Fujian Teachers University(Natural Science),2011,27(2):81-86. |
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| Authors: | YUE Rui-li ZHANG Zhi-jian MA Rong GUAN Huai-min TONG Yue-jin |
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| Institution: | YUE Rui-li,ZHANG Zhi-jian,MA Rong,GUAN Huai-min,TONG Yue-jin (Chemistry and Materials Science,Fujian Normal University,Fujian Key Laboratory for Polymer Materials,Fuzhou 350007,China) |
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| Abstract: | Using cheap water-glass as silica source,the silica aerogel has been prepared via sol-gel method and azeotropic distillation process under ambient pressure.The effect of preparing conditions on the properties of the SiO2 aerogel was investigated.The optimum conditions were: pH 4.5 and 2 mL of formamide as DCCA,n-butyl alcohol/water in alcogel for azeotropic distillation medium.The bulk density,specific surface area,pore volume and pore size distribution for the resulting silica aerogel were 0.19 g/cm3,689 m... |
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| Keywords: | water-glass sol-gel method DCCA azeotropic distillation silica aerogel |
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