化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (9) : 74-76.

新材料与新技术

γ射线对聚酰亚胺膜结构及气体分离性能的影响

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Influence of γ-ray irradiation on the structure and gas separation of polyimide membrane

Li Bolong¹, Liu Yang², Jiu Yongbin², Zhou Chengfei², Li Yeqing³, Wang Liancai²

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文章历史 +

Received
2017-04-14
Issue Date	Revised Date
2018-11-05	2017-04-14

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摘要

采用⁶⁰Co-γ射线对聚酰亚胺膜进行辐照,通过傅里叶变换红外光谱、热失重分析、压差法气体渗透性能测试等方法对聚酰亚胺气体分离膜结构、热性能和气体分离性能进行表征,考察γ射线辐照对于聚酰亚胺气体分离膜性能的影响。结果表明:γ射线辐照导致聚酰亚胺膜分子结构发生了一些改变,辐射过程中发生开环反应,辐射效应以分子链断裂为主。CO₂气体通过聚酰亚胺膜的渗透系数P(CO₂)远远高于O₂、N₂以及CH₄气体的渗透系数 P(O₂)、P(N₂)和P(CH₄);吸收剂量达到50kGy时,单一气体(O₂、N₂、CO₂、CH₄)通过聚酰亚胺膜的渗透系数均达到最大值;随着吸收剂量的增加,聚酰亚胺分离膜对CO₂/CH₄体系的分离效果越来越好。

Abstract

The effect of γ-ray irradiation on the performance of polyimide gas separation membranes was investigated.After γ-ray irradiation in different doses,the structure and gas separation performance of membranes were studied by fourier transform infrared spectroscopy,thermogravimetric analysis and gas permeation instrument.The results showed that ⁶⁰Co γ-ray had a certain effect on the structure of membranes,the chain scission was considered to be the predominant reaction,the chemical bond break due to the ring-open reaction during the radiation process.When absorbed dose reached 50kGy,the permeation flux of membrane appeared a maximum value.Moreover,the gas selectivity of membrane showed a consistent trend,and the selectivity continuously improved with increasing absorbed doses.

关键词

聚酰亚胺 / γ射线 / 辐射 / 气体分离

Key words

polyimide / γ-ray / radiation / gas separation

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γ射线对聚酰亚胺膜结构及气体分离性能的影响[J]. 化工新型材料, 2018, 46(9): 74-76 DOI:

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