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将聚氨酯(PU)与聚N-异丙基丙烯酰胺(PNIPAM)半互穿网络聚合物(semi-IPN)通过浸入沉淀相转化方法制备成微孔膜,并从亲水性、吸水溶胀性以及透湿性等方面对其温度响应性进行了讨论.PNIPAM的引入使膜的亲水性、吸水性和透湿性大为改善,并显著提高了膜的温度响应能力;但与此同时也使得膜的韧性降低.当PU/PNIPAM为3/1时,可获得最好的综合性能.同传统无孔致密膜相比,PU/PNIPAM semi-IPN微孔膜的透湿机理是基于微孔的开闭,在维持显著的温敏透湿性的同时可实现较高的高温透湿量.
Polyurethane (PU) and poly (N-isopropylacrylamide) (PNIPAM) semi-IPN were prepared into microporous films by immersion precipitation phase inversion method, and were prepared from hydrophilic, water swellability and Moisture permeability and other aspects of its temperature response were discussed.PNIPAM the introduction of membrane hydrophilicity, water absorption and moisture permeability greatly improved, and significantly improve the temperature response ability of the film; but at the same time also makes the membrane Toughness is reduced.When PU / PNIPAM is 3/1, the best overall performance is obtained.Compared with the traditional non-porous dense membrane, the moisture permeability mechanism of the PU / PNIPAM semi-IPN microporous membrane is based on the opening and closing of micropores , While maintaining a significant temperature-sensitive moisture permeability can achieve a high temperature moisture permeability.