选用醋酸钴和环糊精作为聚氨酯(PEA-TDI-MDA)的有机和无机填充改性剂,制备了一系列改性聚氨酯(PU)分离膜.研究了改性PU膜的结构,考察了填充剂的种类和含量对PU膜渗透汽化苯/环己烷分离性能的影响.结果表明,几种改性聚氨酯膜均可分离苯/环己烷混合物中的苯.对于40℃的苯/环己烷(50/50)混合物,随着醋酸钴含量的增加,PU膜渗透性变化不大,而分离因子从7.0提高到11.1;随着环糊精含量的增加,膜的选择性不受影响,而渗透通量从12.8 kg·μm/m2·h提高到22.9 kg·μm/m2·h.
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