| Formation of macroporous gel morphology by phase separation in the silica sol-gel system containing nonionic surfactant |
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| 作者姓名： | Junsheng Wu Xiaogang Li Wei Du Hua Chen |
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| 作者单位： | Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China |
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| 基金项目： | Acknowledgements The financial support PetroChina Co. Ltd. for of the present work from the scientific research and technology development is gratefully acknowledged. |
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| 摘 要： |
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| 关 键 词： | 非离子表面活性剂 硅土溶胶-凝胶系统 大孔凝胶形态学 相分离 |
| 收稿时间： | 2004-12-20 |
Formation of macroporous gel morphology by phase separation in the silica sol-gel system containing nonionic surfactant |
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| Junsheng Wu Xiaogang Li Wei Du Hua Chen.Formation of macroporous gel morphology by phase separation in the silica sol-gel system containing nonionic surfactant[J].Journal of University of Science and Technology Beijing,2005,12(6):564-571. |
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| Authors: | Junsheng Wu Xiaogang Li Wei Du Hua Chen |
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| Abstract: | The phase separation and gel formation behavior in an alkoxy-derived silica sol-gel system containing Ci6EOi5 has been investigated. Various gel morphologies similar to other sol-gel systems containing organic additives were obtained by changing the preparation conditions. Micrometer-range interconnected porous gels were obtained by freezing transitional structures of phase separation in the sol-gel process. The dependence of the resulting gel morphology on several important reaction parameters such as the starting composition, reaction temperature and acid catalyst concentration was studied in detail. The experimental results indicate that the gel morphology is mainly determined by the time relation between the onset of phase separation and gel formation. |
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| Keywords: | silica sol-gel phase separation macroporous gel morphology nonionic surfactant |
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