高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (5): 824.

• 研究快报 • 上一篇    下一篇

超快速溶胶-凝胶法制备高纯二氧化硅单块

王策1, 张亚红1, 董林1, 付立民1, 白玉白1, 李铁津1, 刘志红2, 危岩3   

  1. 1. 吉林大学化学系, 长春 130023;
    2. 长春高等医学专科学校, 长春 130031;
    3. 爵硕大学化学系, 费城, PA 19104, 美国
  • 出版日期:1999-05-24 发布日期:1999-05-24
  • 通讯作者: 王 策,女,40岁,博士,副教授.
  • 作者简介:王 策,女,40岁,博士,副教授.
  • 基金资助:

    国家自然科学基金(批准号:5987009)资助课题

Preparation of Monolithic Silica Glass by an Ultra fast Sol gel Process

WANG Ce1, ZHANG Ya-Hong1, DONG Lin1, FU Li-Min1, BAI Yu-Bai1, LI Tie-Jin1, LIU Zhi Hong2, WEI Yan3   

  1. 1. Department of Chemistry, Jilin University, Changchun, 130023;
    2. Department of Pharmacology, Changchun Medicine Training College, Changchun, 130031;
    3. Department of Chemistry, Drexel University, Philadelphia, PA 19104, USA
  • Online:1999-05-24 Published:1999-05-24

摘要: 传统的溶胶-凝胶工艺存在几个严重的缺点,例如,凝胶时间过长(20d以上),体积收缩太大(>75%),形状和尺寸无法控制以及严重的龟裂等[1].这些缺点限制了它在技术上的应用.

关键词: 正硅酸乙酯, 溶胶-凝胶过程, 二氧化硅单块

Abstract: An ultra-fast sol-gel process has been developed to get high content silica materials, in which, the solvent tetrahydrofuran(THF) for hydrolysis of precursor tetraethyl orthosilicate, was removed through solvent extraction to obtain bulk sol. The bulk sol can be molded in different shapes such as discoid, pellet, octagon, cylinder, and half sphere. They solidified and gelled in a very short time in the presence of lithium salt. Measurements show that the silica monoliths possess volume shrinkage of 52%, high silica content of 82.4% and transmittance of 70% in the UV/Vis region, and are crack-free indefinitely.

Key words: Tetraethyl orthosilicate, Sol-gel process, Silica monoliths

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