Abstract The ultrashort and controllable membrane-forming process is highly required in large-scale production of PDMS membrane. To shorten the cross-linking time, an UV-induced ring-opening polymerization of the epoxide groups was introduced to the preparation of PDMS membranes. PDMS was firstly functionalized with epoxide groups, providing the possibility of being cross-linked under UV irradiation. With this strategy, the membrane curing was finished within 200 s, hence shortened by two orders of magnitude in comparison with the conventional thermal-driven method. Meanwhile, the cationic photoinitiation of epoxide groups can be achieved without oxygen inhibition in an open-air environment. Moreover, the viscosity of the coating solution in the groove is kept constant when protected from light, thus meeting the requirement of the coatability. When applied to the pervaporation of a 1.5 wt% 1-butanol/water solution at 55 °C, the measured 1-butanol separation factor was 45 and the total flux was 1119 g m−2 h−1. This novel strategy shows a great prospect in the continuous preparation of membrane.

中文翻译：

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基于环氧化物的 PDMS 膜具有超短且可控的成膜工艺，用于 1-丁醇/水渗透蒸发

摘要 PDMS膜的规模化生产对超短、可控的成膜工艺要求很高。为了缩短交联时间，将紫外线诱导的环氧基开环聚合引入到 PDMS 膜的制备中。PDMS 首先用环氧基团官能化，提供了在紫外线照射下交联的可能性。使用这种策略，膜固化在 200 秒内完成，因此与传统的热驱动方法相比缩短了两个数量级。同时，环氧基团的阳离子光引发可以在露天环境中无氧抑制的情况下实现。并且，在避光的情况下，凹槽中的涂布液的粘度保持恒定，从而满足涂布性的要求。当应用于 55 °C 下 1.5 wt% 1-丁醇/水溶液的渗透蒸发时，测得的 1-丁醇分离因子为 45，总通量为 1119 g m-2 h-1。这种新颖的策略在膜的连续制备中显示出巨大的前景。