| 膨体聚四氟乙烯膜气体透过行为的研究 |
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| 引用本文： | 张慧峰,张卫东,石冰洁,张泽廷.膨体聚四氟乙烯膜气体透过行为的研究[J].北京化工大学学报(自然科学版),2003,30(4):9-12. |
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| 作者姓名： | 张慧峰 张卫东 石冰洁 张泽廷 |
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| 作者单位： | 北京化工大学化学工程学院,北京,100029 |
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| 基金项目： | 高等学校博士学科点专项科研项目;20020010004; |
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| 摘 要： | 文中利用具有不同结构参数的膨体聚四氟乙烯膜，选择不同性质的气体(H2、He、N2、O2、CO2)研究其透过行为。研究表明：气体以努森扩散和粘性流动的形式透过膜孔，且透过系数与气体分子量的0.5次方成反比，与膜厚度成反比，单孔透过系数与孔半径成3.6次方的关系。根据分离因子和膜结构参数对透过系数的影响，可以进行膜结构的设计，使其成为具备一定防止大分子毒气入侵功能的军用防护服装材料。
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| 关 键 词： | PTFE膜 气体分离 透气行为 PTFE膜 气体分离 透气行为 |
Gas permeation behavior across expanded polytetrafluoroethylene membranes |
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| ZHANG Hui-feng ZHANG Wei-dong SHI Bing-jie ZHANG Ze-ting.Gas permeation behavior across expanded polytetrafluoroethylene membranes[J].Journal of Beijing University of Chemical Technology,2003,30(4):9-12. |
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| Authors: | ZHANG Hui-feng ZHANG Wei-dong SHI Bing-jie ZHANG Ze-ting |
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| Institution: | College of Chemical Engineering; Beijing University of Chemical Technology; Beijing; China |
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| Abstract: | A series of polytetrafluoroethylene (PTFE) membranes with different structures and gases with different molecular weights(H_2,He,N_2,O_2 and CO_2) were used as experimental systems for studying permeating behavior of gas. Based on experimental results, some conclusions can be drawn: Gas diffuses across PTFE membrane in Knudsen diffusion and Poiseuille flow, and permeating coefficient is inversely proportional to molecular weight's 0.5 power and membrane's thickness, and directly proportional to radius's 3.6 power. PTFE membranes in this study are good materials for preventing some toxic gases. |
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| Keywords: | PTFE membranes gas separation permeating behavior |
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