| 疏水型SiO2气凝胶 |
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| 引用本文： | 邓忠生,魏建东,吴爱梅,暴玉萍,王珏,沈军,周斌,陈玲燕.疏水型SiO2气凝胶[J].无机材料学报,2000,15(2):381. |
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| 作者姓名： | 邓忠生 魏建东 吴爱梅 暴玉萍 王珏 沈军 周斌 陈玲燕 |
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| 作者单位： | 1. 同济大学波耳固体物理研究所, 上海 200092; 2. 上海化工研究院, 上海 200062 |
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| 基金项目： | 国家自然科学基金!（59802007），863基金!（863－416－3－9），军品配套项目!（教军配96－6），启明星后基 |
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| 摘 要： | 以多聚硅为硅源，通过溶胶-凝胶、表面修饰及超临界干燥过程制备出了疏水型ＳｉＯ２气凝胶．表面修饰后ＳｉＯ２气凝胶孔洞由修饰前的２３．１ｎｍ减小到１８．２ｎｍ；比表面积由修饰前的 ４７７ｍ２ｇ－１增加到 ５６３ｍ２ｇ－１，骨架颗粒比修饰前略大，饱和水蒸汽吸附量由吸附前的０．０４（重量比）降低到０．００１２，且与水不浸润．
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| 关 键 词： | 疏水 SiO2气凝胶 溶胶-凝胶 表面修饰 超临界干燥 |
| 收稿时间： | 1999-05-10 |
| 修稿时间： | 1999-05-26 |
Hydrophobic SiO2 Aerogels Prepared with Polyethoxydisiloxanes |
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| DENG Zhong-Sheng,WEI Jian-Dong,Wu Ai-Mei,BAO Yu-ping,WANG Jue,SHEN Jun,ZHOU Bin,CHEN Ling-Yan.Hydrophobic SiO2 Aerogels Prepared with Polyethoxydisiloxanes[J].Journal of Inorganic Materials,2000,15(2):381. |
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| Authors: | DENG Zhong-Sheng WEI Jian-Dong Wu Ai-Mei BAO Yu-ping WANG Jue SHEN Jun ZHOU Bin CHEN Ling-Yan |
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| Affiliation: | 1. Pohl Institute of Solid State Physics; Tongji University; Shanghai 200092; China; 2. Shanghai Institute of Chemical Engineering; Shanghai 200062; China |
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| Abstract: | Hydrophobic SiO2 aerogels were produced by the surface modification of alcogels prepared via sol-gel process using polyethoxydisiloxanes (E--40) as the precursor and followed by ethanol supercritical drying. The structure of the modified silica aerogels was a silica matrix produced by hydrolysis and condensation of polyethoxydisiloxanes. St-CH3 was modified on the surface of the silica matrix. The pore size decreased from 23.1nm to 18.2nm, the specific surface area increased from 477 m2 .g-1 to 563 m2.g-1 and the water vapor adsorption decreased from 0.04 to 0.0012(weight ratio) after the surface modification Of silica asrogels. The existence of Si-CH3 was observed using infrared spectra. |
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| Keywords: | hydrophobic SiO2 aerogel sol-gel surface modification super critical drying |
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