论文部分内容阅读
以聚间苯二甲酰间苯二胺(PMIA)为材料,通过相转化法制备了PMIA基膜,在此基础上,以哌嗪(PIP)溶液为水相单体,均苯三甲酰氯(TMC)正己烷溶液为有机相单体,通过界面聚合法制备了聚哌嗪酰胺复合纳滤膜。对膜表面的形貌及特征进行了表征分析,研究了单体含量、反应时间对复合膜性能的影响,并用4种无机盐溶液和3种染料对膜进行了性能评价。结果表明,在基膜表面成功聚合了一层聚酰胺功能层,该功能层具有良好的亲水性能。膜表面呈现荷负电性,对4种无机盐的截留顺序为Na_2SO_4>MgSO_4>MgCl_2>NaCl。膜对酸性红B、活性黄3和直接耐晒蓝B2RL这3种染料的截留率可达到98%以上,表现出优异的脱色性能。
PMIA film was prepared by phase inversion method using poly (m-phenylene isophthalamide) (PMIA) as the material. Based on this, the PIP solution was used as the water phase monomer, trimesoyl chloride TMC) n-hexane solution as organic phase monomer, the poly (piperazine amide) composite nanofiltration membrane was prepared by interfacial polymerization. The morphologies and characteristics of the membrane surface were characterized and analyzed. The effects of monomer content and reaction time on the properties of the composite membrane were investigated. Four kinds of inorganic salt solutions and three dyes were used to evaluate the performance of the membrane. The results showed that a polyamide functional layer was successfully polymerized on the surface of the base film, and the functional layer had good hydrophilic property. The surface of the membrane showed negative charge, and the order of interception of the four inorganic salts was Na_2SO_4> MgSO_4> MgCl_2> NaCl. The rejection of the three dyes, Acid Red B, Reactive Yellow 3 and Direct Fast Blue B2RL, can reach more than 98%, showing excellent decoloration performance.