高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (5): 713.

• 研究论文 •    下一篇

溶胶-凝胶法制备硅系有机-无机杂化分离膜

张国昌, 陈运法, 吴镇江, 谢裕生   

  1. 中国科学院化工冶金研究所, 北京 100080
  • 收稿日期:2000-04-21 出版日期:2001-05-24 发布日期:2001-05-24
  • 通讯作者: 陈运法(1965年出生),男,博士,研究员,博士生导师,从事新材料研究.
  • 基金资助:

    中国科学院院长基金(批准号:院基计724号)资助

Sol-gel Derived Inorganic/Organic Hybrid Separation Membrane

ZHANG Guo-Chang, CHEN Yun-Fa, WU Zhen-Jiang, XIE Yu-Sheng   

  1. Institute of Chemical Metallurgy, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2000-04-21 Online:2001-05-24 Published:2001-05-24

PDF (PC)

被引次数

39

摘要： 以α-Al2O3多孔陶瓷片为载体,用溶胶-凝胶法制备有机-无机杂化分离膜.通过考察前驱物的组成及杂化溶胶的合成条件对制膜工艺过程的影响,得到了制备有机-无机杂化分离膜的各种适宜性参数.红外光谱(FTIR)分析结果表明,杂化溶胶的性能不仅决定分离膜的性能,而且对膜热处理过程中的龟裂有很大影响.膜层的厚度为1～2μm;在膜两侧压差为0.10MPa、n(PTMOS)/n(TEOS)=1.16时,膜对O2/N2,CO2/N2和CO2/O2的分离因子分别为2.30,4.31和1.17,渗透系数为75.81×10-17,75.28×10-17和72.78×10-17m3(STP)·m/(m2·s·Pa).

关键词: 有机-无机杂化分离膜, 溶胶-凝胶, 分离因子, 渗透系数

Abstract: Organic/inorganic hybrid separation membranes have been prepared on porous α-Al2O3 substrates (pore size, 1—10 μm). The effects of sol synthesis conditions, such as reaction temperature, solvent pH, sol viscosity, n (PTMOS)/ n (TEOS) and n (H2O)/ n (alkoxide) ratios, on the layer processing and its performance of the resulted membrane were characterized, and an optimum condition of the procedure was achieved. From FTIRspectra, it is found that the crack formation in the membrane is principally related to the structure of the Si—O—Si other than the solvent nature and any other factors. The thickness of the hybrid layer is about1-2 μm estimated by the SEMimage of cross section. The selectivity of O2/N2 and CO2/N2 as well as CO2/O2 is 2.30, 4.31 and 1.17 respectively, and the permeability is 75.81×10-17, 75.28× 10-17 and 72.78×10-17 m3(STP)·m/(m2·s·Pa) when the trans membrane pressure difference is 0.10 MPa and the n (PTMOS)/ n (TEOS) ratio is equal to 1.16.

Key words: Organic/Inorganic hybrid separation membrane, Sol-gel technology, Separation factor, Permeability

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