| 块状低密度C/SiO2复合气凝胶的制备 |
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| 引用本文： | 孔勇,仲亚,沈晓冬,胡丹丹,崔升,滕凯明,张君君.块状低密度C/SiO2复合气凝胶的制备[J].南京工业大学学报(自然科学版),2012,34(4):6-10. |
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| 作者姓名： | 孔勇 仲亚 沈晓冬 胡丹丹 崔升 滕凯明 张君君 |
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| 作者单位： | 南京工业大学材料科学与工程学院,材料化学工程国家重点实验室,江苏南京210009 |
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| 基金项目： | 国家自然科学基金资助项目，江苏省自然科学基金重点资助项目，材料化学工程国家重点实验室开放课题基金资助项目，国家安全重大基础研究资助项目，江苏省普通高校研究生科研创新计划资助项目 |
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| 摘 要： | 采用溶胶凝胶法结合CO2超临界干燥工艺制备间苯二酚甲醛/SiO2（RF/SiO2）复合气凝胶,RF/SiO2气凝胶高温炭化得到块状低密度C/SiO2复合气凝胶研究反应物质量分数对溶胶凝胶过程和热处理过程的影响,考察不同热处理温度对C/SiO2复合气凝胶孔结构的影响。结果表明:反应物质量分数为13%时,RF/SiO2气凝胶受热处理工艺的影响较小,炭化温度升高至1200℃对C/SiO2气凝胶网络结构有明显的改善作用。
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| 关 键 词： | RF/SiO2气凝胶 C/SiO2气凝胶 超临界干燥 炭化 孔结构 |
Preparation of monolithic C/SiO2 composite aerogels with low density |
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| KONG Yong
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ZHONG Ya
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SHEN Xiaodong
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HU Dandan
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CUI Sheng
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TENG Kaiming
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ZHANG Junjun.Preparation of monolithic C/SiO2 composite aerogels with low density[J].Journal of Nanjing University of Technology,2012,34(4):6-10. |
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| Authors: | KONG Yong ZHONG Ya SHEN Xiaodong HU Dandan CUI Sheng TENG Kaiming ZHANG Junjun |
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| Institution: | (State Key Laboratory of Materials-Oriented Chemical Engineering,College of Materials Seienee and Engineering, Nanjing University of Technology,Nanjing 210009,China) |
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| Abstract: | Resorcin-formaldehyde/SiO2 composite（RF/SiO2）aerogels were synthesized bv the sol-gel method and CO2 supercritical fluid drying.C/SiO2 composite aerogels were formed front the RF/SiO2 aerogels after carbonization.The influence of reactant concentration on sol-gel and thermal treatment processes was investigated.The effect of heat treatment temperature on pore structure of C/SiO2 aerogels was discussed.Results showed that the heat treatment had the least impact on RF/SiO2 aerogels with the reactant concentration of 13%,and increasing the carbonization temperature to 1 200℃had an obvious improvement to the network structure of C/SiO2 aerogels. |
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| Keywords: | RF/SiO2 aerogels C/SiO2 aerogels supercritical drying carbonization pore structure |
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