| SiO2气凝胶的非超临界干燥法制备与表征 |
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| 引用本文： | 曹淑伟,谢征芳,王军,王浩,薛金根. SiO2气凝胶的非超临界干燥法制备与表征[J]. 硅酸盐学报, 2007, 35(11): 1551-1555 |
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| 作者姓名： | 曹淑伟 谢征芳 王军 王浩 薛金根 |
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| 作者单位： | 国防科技大学航天与材料工程学院,新型陶瓷纤维及复合材料国防科技重点实验室,长沙,410073 |
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| 摘 要： | 以聚二甲基硅烷为原料,采用聚合物超临界法制备了SiO2气凝胶.聚合物超临界法制备的SiO2气凝胶除碳前为疏水性气凝胶,比表面积为27.68 m2/g,孔体积为0.103 7 cm3/g,平均孔径约为15 nm;除碳后为亲水性气凝胶,比表面积为500.6 m2/g,孔体积为0.404 3 cm3/g,平均孔径为3.23 nm.对聚合物超临界法制备SiO2气凝胶的反应机理进行了初步探讨.
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| 关 键 词： | 氧化硅气凝胶 硅聚合物 非超临界干燥 疏水 亲水 |
| 文章编号： | 0454-5648（2007）11-1551-05 |
| 修稿时间： | 2007-01-08 |
SYNTHESIS AND CHARACTERIZATION OF SILICA AEROGELS BY NON-SUPERCRITICAL DRYING METHOD |
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| CAO Shuwei,XIE Zhengfang,WANG Jun,WANG Hao,XUE Jingen. SYNTHESIS AND CHARACTERIZATION OF SILICA AEROGELS BY NON-SUPERCRITICAL DRYING METHOD[J]. Journal of The Chinese Ceramic Society, 2007, 35(11): 1551-1555 |
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| Authors: | CAO Shuwei XIE Zhengfang WANG Jun WANG Hao XUE Jingen |
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| Affiliation: | State Key Laboratory of Advanced Ceramic Fibers and Composites, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | Using polydimethylsilane as silica source,silica acrogels were synthesized via a polymer supercritical method.The silica aerogels,with an average pore diameter of 15 nm before carbon removal,are hydrophobic,and their specific surface area and pore volume are 27.68 m~2/g and 0.103 7 cm~3/g respectively.After carbon removal,the silica aerogels,which have an average pore diameter of 3.23 rim,become hydrophilic.Their specific surface area and pore volume are 500.6 m~2/g and 0.404 3 cm~3/g respectively.Moreover, the reaction mechanism of silica acrogels prepared by this processing method was discussed. |
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| Keywords: | silica aerogel silicon containing polymer non-supercritical drying hydrophobic hydrophilic |
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