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首页> 外文期刊>Journal of Applied Polymer Science >Surface modification of polyimide and polysulfone membranes by ion beam for gas separation
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Surface modification of polyimide and polysulfone membranes by ion beam for gas separation

机译：离子束对聚酰亚胺和聚砜膜进行表面改性以分离气体

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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 CO2 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 structure of membrane skin has been changed to a barrier layer. The formation of barrier layer was confirmed by comparing the calculated values of a simple 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. (C) 2000 John Wiley & Sons. Inc. [References: 18]
机译：已经进行了通过离子束对聚酰亚胺（PI）和聚砜（PSf）进行表面碳化的方法，以适应聚合物膜皮肤上的碳分子筛特性，而不会使膜结构变形。为了控制膜皮肤的结构并改善气体传输性能，已经改变了辐照条件，例如剂量和离子束的来源。与未经处理的原始膜相比，通过表面改性的PI和PSf膜在N-2上理想的CO2分离因子增加了三倍，而渗透率却降低了近两个数量级。这似乎是由于膜皮的结构已被改变为阻挡层这一事实。通过将简单电阻模型的计算值与实验结果进行比较，可以确定阻挡层的形成，并且该阻挡层的渗透率估计为10（-4）barrerer。可以得出结论，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。 （C）2000 John Wiley＆Sons。 Inc. [参考：18]

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