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以聚砜中空纤维超滤膜为基膜,哌嗪(PIP)为水相反应单体,均苯三甲酰氯(TMC)为有机相反应单体,通过界面聚合法制备聚酰胺复合纳滤膜。研究了水相单体浓度、有机相单体浓度、热处理温度和时间等条件对复合膜分离性能的影响;并初步探讨了操作压力、料液温度和pH值等操作条件对复合膜分离性能的影响。实验结果表明,在0.7MPa,25℃下,所制备的复合膜对1g·L-1MgSO4的截留率为97.49%,水通量为33.81 L·m-2·h-1。
Polyamide composite nanofiltration membrane was prepared by interfacial polymerization using polysulfone hollow fiber membrane as base membrane, piperazine (PIP) as water phase reaction monomer and trimesoyl chloride (TMC) as organic phase reaction monomer. The effects of the monomer concentration in the aqueous phase, the monomer concentration in the organic phase, the temperature and the time of the heat treatment on the separation performance of the composite membrane were investigated. The effects of operating pressure, feed temperature and pH on the separation performance of the composite membrane influences. The experimental results showed that the rejection of 1g · L-1MgSO4 was 97.49% and the water flux was 33.81 L · m-2 · h-1 at 0.7MPa and 25 ℃.