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首页> 外文期刊>Journal of Applied Polymer Science >Reducing the crystallinity of high molecular weight poly (ethylene oxide) using ultraviolet cross-linking for preparation of gas separation membranes
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Reducing the crystallinity of high molecular weight poly (ethylene oxide) using ultraviolet cross-linking for preparation of gas separation membranes

机译：使用紫外线交联减少高分子量聚（环氧乙烷）的结晶度，用于制备气体分离膜

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摘要

CO2-selective cross-linked poly (ethylene oxide) (PEO) membranes were prepared by the UV irradiation of high molecular weight PEO in the presence of benzophenone as photo-initiator, which act as a hydrogen-abstracting agent. The main goal was to study the effects of the cross-linking process on the structural properties of hydrogel films intended for the gas separation applications. It was found that the gel fraction, and cross-link density enhanced, and the crystallinity, and the size of spherulites decreased by the cross-linking process. Moreover, the permeation performances for N-2, O-2, CH4, and CO(2)and the relationship between the gas permeation performances and physical properties were investigated. The results indicated that the degree of cross-linking and crystallinity could be controlled by changing the initiator concentration, as by increasing the initiator content, the crystallinity percent and gas permeability of the membranes decreased, and the gas pair ideal selectivity of CO2/N-2, CO2/CH4, CH4/N-2, and O-2/N(2)increased.
机译：以二苯甲酮为光引发剂，以高分子量聚氧化乙烯（PEO）为原料，采用紫外辐照法制备了CO2选择性交联聚氧化乙烯（PEO）膜。主要目的是研究交联过程对用于气体分离应用的水凝胶膜结构特性的影响。结果表明，交联过程提高了凝胶分数和交联密度，降低了结晶度和球晶尺寸。此外，还研究了气体对N-2、O-2、CH4和CO（2）的渗透性能以及气体渗透性能与物理性能之间的关系。结果表明，通过改变引发剂浓度可以控制膜的交联度和结晶度，随着引发剂含量的增加，膜的结晶度和透气性降低，CO2/N-2、CO2/CH4、CH4/N-2和O-2/N（2）的气对理想选择性增加。

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