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首页> 外文期刊>Journal of Applied Polymer Science >Surface Modification of Polyimide and Polysulfone Membranes by lon Beam for Gas Separation
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Surface Modification of Polyimide and Polysulfone Membranes by lon Beam for Gas Separation

机译：离子束对聚酰亚胺和聚砜膜的表面改性

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摘要

The surface carbonization of polyimide (PI)and polysulfone (PSf) by ion beam has been performed to adapt the carbon molecular sieve properties on the skin of the polymeric membranes without the deformation of the membrane structure.In order to control the structure of membrane skin and to improve gas transport properties, the irradiation conditions, such as the dosage and the source of ion beams,have been varied.The ideal separation factor of CO_2 over N_2 through the surface-modified PI and PSf membranes increased threefold compared to those of the untreated,pristine membranes, whereas the permeability decreased with almost two orders of magnitude. This appears to be due to the fact that the struture of membrane skin has been change to a barrier layer.The formation of barrier layer was confirmed by comparing the calculated values of a simple reple resistance model with the experimental results, and the estimated permeability of this barrier was 10~(-4) barrer.It was concluded that ion beam irradiation could provide a useful tool for improving selectivity for gas separation membranes.
机译：进行了离子束对聚酰亚胺（PI）和聚砜（PSf）的表面碳化处理，以适应聚合物膜皮肤上的碳分子筛特性，而不会改变膜结构。为了改善气体的传输性能，改变了辐照条件，例如剂量和离子束来源。通过表面改性的PI和PSf膜，CO_2在N_2上的理想分离因子比传统的膜高了三倍。未经处理的原始膜，而渗透率下降了几乎两个数量级。这似乎是由于膜表皮的结构已变为屏障层这一事实。通过将简单的耐反复性模型的计算值与实验结果以及估计的渗透率进行比较，证实了屏障层的形成。离子束辐照可以为提高气体分离膜的选择性提供有用的工具。

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