应用化学 ›› 1988, Vol. 0 ›› Issue (1): 74-77.

• 研究简报 • 上一篇    下一篇

合成高分子膜透气速率的温度依赖性

田禾, 张可达, 徐纪平   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1986-12-02 修回日期:1987-03-19 出版日期:1988-02-10 发布日期:1988-02-10

THE DEPENDENCE OF GAS TRANSPORT RATE OF POLYMER MEMBRANES ON TEMPERATURE

Tian He, Zhang Keda, Xu Jiping   

  1. Institute of Applied Chemistry, Academia Sinica
  • Received:1986-12-02 Revised:1987-03-19 Published:1988-02-10 Online:1988-02-10

摘要: 近年来以气体选择性分离为目的的合成高分子膜的研究取得了巨大的进步.气体分离膜的两个基本性能参数是透气速率J及选择系数α.同一个膜,在较高温度使用时,往往是J值增大,α值下降,因此选择适当地操作温度,以便得到最佳的J-α搭配是很重要的.本文讨论了甲基硅橡胶(MSR)、天然橡胶(NR)、乙丙橡胶(EPR)、聚乙烯(PE)、聚(4-甲基戊烯-1)(TPX)等材料的均质膜或复合膜,在不同温度下的氧、氮透过速率,计算了各种膜材料的氧、氮表观透过活化能,并对其本质进行了探讨.

关键词: 聚合物膜, 气体分离, 薄膜结构, 性能

Abstract: The oxygen and nitrogen transport rate of methylsilicone rubber, poly (4-methylpentene-1), ethylene-propylene rubber, high-pressure polyethylene and natural rubber membranes were measured at different temperature. The results exhibited that the dependence of gas transport rate of polymer membranes on temperature is relative only to the materials the membranes made. The oxygen and nitrogen permeation activation energy and the temperature coefficient of the gas transport rate were calculated. The relationship of permeation activation energy with the molecular structure of membrane materials was discussed.

Key words: Polymer film, Gas separation, Membrane structure, Property