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针对聚哌嗪酰胺复合纳滤膜的制备过程热处理中存在的可能影响界面聚合程度的因素,采用自制的烘箱对复合纳滤膜进行热处理,并研究膜性能的变化规律。烘箱以变频鼓风机控制空气体积流量为200~1 200 m~3/h。考察了热处理温度、鼓风流量对复合纳滤膜性能的影响,研究了所得纳滤膜的氯化钠与硫酸镁截留率、水通量。对不同鼓风速率所制备的纳滤膜表面进行了扫描电子显微镜与全反射傅里叶红外光谱分析。结果表明,烘箱的鼓风流量和温度共同决定了界面聚合过程,从而最终决定了纳滤膜的水处理性能。
Aiming at the factors that may affect the degree of interfacial polymerization during the heat treatment of poly-piperazineamide composite nanofiltration membrane, the self-made oven was used to heat-treat the composite nanofiltration membrane and to study the variation of membrane performance. Oven to frequency conversion blower control air volume flow of 200 ~ 1 200 m ~ 3 / h. The effects of heat treatment temperature and blast flow rate on the performance of the composite nanofiltration membrane were investigated. The rejection and water flux of sodium chloride and magnesium sulfate in the obtained nanofiltration membrane were investigated. The surface of the nanofiltration membranes prepared at different blast rates were analyzed by scanning electron microscopy and total reflectance Fourier transform infrared spectroscopy. The results show that the blast furnace air flow and temperature together determine the interfacial polymerization process, which ultimately determines the nanofiltration membrane water treatment performance.