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采用壳聚糖为原料,聚酯无纺布为支撑层,用戊二醛交联制备了高选择性、高通量的交联壳聚糖渗透蒸发复合膜。考察了料液浓度、料液温度、膜厚等对偏二甲肼/水体系分离性能的影响。结果表明:在料液温度为10℃,膜厚度为25μm,进料液中偏二甲肼的质量分数为50%时,改性复合膜的分离因子最高达到5.25,渗透通量可达167 g/(m2.h)。
Using chitosan as raw material and polyester non-woven fabric as supporting layer, a highly selective and high-throughput cross-linked chitosan pervaporation composite membrane was prepared by cross-linking with glutaraldehyde. The effects of feed concentration, feed temperature and membrane thickness on the separation performance of UDMH / water system were investigated. The results showed that the separation factor of modified composite membrane was up to 5.25 and the permeation flux was up to 167 g at the temperature of 10 ℃, the membrane thickness of 25 μm and the mass fraction of UDMH in the feed solution was 50% /(m2.h).