渗透物小分子在致密高聚物膜内传递行为的研究(Ⅰ)扩散行为的分类和描述

Study on the transfer behavior of small molecular permeates in dense polymer membranes (Ⅰ) Classification and description of diffusion behavior

综述了渗透物小分子在致密高聚物膜内传递的溶解扩散模型及其不足 ,用自由体积理论和逾渗理论分析了渗透物小分子在致密高聚物膜内的扩散行为 ,提出了扩散分区图 ,并分析了渗透物分子大小、温度和致密高聚物膜性质对扩散的影响 .

The solution-diffusion model which was used to describe the permeation process of small molecular permeates in dense polymer membranes, and its shortages were summarized. The diffusion behavior of small molecular permeates in dense polymer membranes was analyzed using the free volume theory and the percolation theory. The partition zone of diffusion was proposed. And the influences of permeate sizes, temperature and characteristics of the dense polymer membranes on the diffusion behavior were assayed.