物理化学学报 >> 2000, Vol. 16 >> Issue (02): 121 -125 .doi: 10.3866/PKU.WHXB20000206

研究论文 上一篇    下一篇

SiO2-AEO凝胶体系的织构特性

孙继红, 吴东, 孙予罕, 杨年华, 周建伟, 岳勇   

  1. 中国科学院山西煤炭化学研究所 煤转化国家重点实验室,太原 030001|中国科学院武汉物理与数学研究所 波谱与原子分子物理国家重点实验室,武汉 430071
  • 收稿日期:1999-05-27 修回日期:1999-07-23 发布日期:2000-02-15
  • 通讯作者: 孙予罕

Textural Characterization of SiO2-AEO Xerogels

Sun Ji-Hong, Wu Dong, Sun Yu-Han, Yang Nian-Hua, Zhou Jian-Wei, Yue Yong   

  1. State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001|State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics,Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences Wuhan 430071
  • Received:1999-05-27 Revised:1999-07-23 Published:2000-02-15
  • Contact: Sun Yu-Han

摘要:

采用溶胶-凝胶法 ,以正硅酸乙酯 (TEOS)为前驱体 ,用脂肪醇聚氧乙烯醚 (AEO)为改性剂制备结构可控的多孔SiO2 干凝胶. 结果表明 :通过调节添加量和聚合度以及溶胶老化时间可以对SiO2 干凝胶织构性质进行有效的调控 ;采用不同的环境气氛对SiO2 AEO干凝胶进行热处理 ,则AEO表现出不同的热稳定性 ;经热处理后 ,AEO等有机残留物被脱除的同时 ,SiO2-AEO干凝胶柔性骨架得到加强 ,孔分布更趋集中 ,干凝胶结构的热稳定性得到进一步提高.

关键词: 脂肪醇聚氧乙烯醚(SEO), SiO2-AEO, 孔分子, TG-DTA

Abstract:

The porous SiO2 xerogels with controlled texture were obtained from TE OS in the presence of AEO by sol gel method. It was found that the addition amount and molecular weight of AEO and ageing time of SiO2 AEO sol could adjust the textural properties of SiO2 xerogels, and AEO in the xerogel had different thermal stability when the SiO2 AEO xerogel being heated under different atmospheres .As a result, It has been found that the SiO2 xerogel showed stronger flexible skeleton, narrower pore distribution, and higher thermal stability after heat treatment.

Key words: AEO, SiO2-AEO, Pore size distribution, TG-DTA