以N,N '-双(3-氨丙基)甲胺为水相单体,均苯三甲酰氯为有机相单体,采用界面聚合的方式制备了荷正电复合纳滤膜.该复合纳滤膜表现出荷正电膜的截留特性,对不同盐溶液的截留顺序为MgCl2＞CaCl2＞MgSO4＞NaCl＞Na2SO4.通过扫描电子显微镜、原子力显微镜、衰减全反射红外光谱仪对复合纳滤膜的结构进行表征,利用Zeta电位仪考察该膜表面的荷电性,用接触角测量仪测定膜表面亲水性.同时考察该纳滤膜在硬度脱除方面的应用.
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