| 微波辅助溶胶-凝胶法制备高比表面积SiO2气凝胶 |
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| 引用本文： | 黄湘桦,郑文芝,陈姚,郑成.微波辅助溶胶-凝胶法制备高比表面积SiO2气凝胶[J].精细化工,2011,28(4):319-323,327. |
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| 作者姓名： | 黄湘桦 郑文芝 陈姚 郑成 |
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| 作者单位： | 广州大学,化学化工学院,广东,广州,510006 |
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| 基金项目： | 广东省科技计划资助项目，广州市科技计划资助项目 |
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| 摘 要： | 以四甲氧基硅烷(TMOS)为原料,三甲基氯硅烷(TMCS)为疏水改性剂,通过微波辅助溶胶-凝胶法制备高比表面积SiO2气凝胶,用FTIR、SEM、XRD、BET以及TG-DSC对其结构进行表征。结果表明,微波辅助溶胶-凝胶法制得的SiO2气凝胶比表面积达1 096 m2/g,SiO2气凝胶颗粒呈均匀分布,孔径主要分布在2～10 nm;与水的接触角为141°,表现出良好的疏水性;在空气中的耐温点达543℃,具有良好的热稳定性。
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| 关 键 词： | 溶胶-凝胶法 微波 疏水性 热稳定性 功能材料 |
| 收稿时间： | 2010/11/15 0:00:00 |
| 修稿时间： | 1/4/2011 12:00:00 AM |
Synthesis of high specific area silica aero-gels via microwave assist Sol-Gel method |
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| huangxianghu,ZHENG Wen-zhi,CHEN Yao and ZHENG Cheng.Synthesis of high specific area silica aero-gels via microwave assist Sol-Gel method[J].Fine Chemicals,2011,28(4):319-323,327. |
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| Authors: | huangxianghu ZHENG Wen-zhi CHEN Yao and ZHENG Cheng |
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| Affiliation: | Guangzhou University,Guangzhou University,Guangzhou University,Guangzhou University |
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| Abstract: | Using TMOS as base material,TMCS as modifier,high surface area hydrophobic silica aerogels were prepared by method of microwave-assisted sol-gel and ambient pressure drying.The structure of the samples was characterized by means of FTIR,SEM,XRD,BET and TG-DSC.The results show that the samples are hydrophobic silica aero-gels with homogeneous distribution.The specific surface area is 1 096 m2/g and the pore diameters mostly range from 2 to 10 nm.Moreover,the water contact angle is 141°,and the thermal stability in the air is 543 ℃,which show that the silica aero-gels demonstrate superior hydrophobicity and better thermal stability. |
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| Keywords: | Sol-Gel Micro-wave hydrophobicity thermal stability |
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