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通过与氯化亚砜反应,将间苯二胺的氨基保护,所得产物1,3-二(N-亚磺酰胺)苯作为有机相第二单体,参与聚哌嗪酰胺复合纳滤膜的界面聚合。1,3-二(N-亚磺酰胺)苯添加质量浓度范围为0~0.06%,研究了该变量对纳滤膜盐截留率、水通量、表面形貌、水接触角的影响。结果表明,1,3-二(N-亚磺酰胺)苯可作为调节纳滤膜性能的添加剂,并改变膜表面形貌与水处理性能。当1,3-二(N-亚磺酰胺)苯的添加量介于0~0.03%时,纳滤膜对氯化钠溶液的截留率下降,水通量上升;当1,3-二(N-亚磺酰胺)苯的添加量介于0.03%~0.06%时,纳滤膜对氯化钠溶液的截留率基本不变,水通量下降。最后探讨了亚磺酰胺基团在界面反应中的作用机理。
The amino group of m-phenylenediamine was protected by reaction with thionyl chloride. The resulting 1,3-bis (N-sulfinamide) benzene was used as the second monomer in the organic phase to participate in the reaction of poly Interface aggregation. The mass concentration of 1, 3-bis (N-sulfinamide) benzene was 0 ~ 0.06%, and the effect of this variable on salt rejection, water flux, surface morphology and water contact angle of nanofiltration membrane was investigated. The results showed that 1,3-bis (N-sulfinamide) benzene can be used as an additive to adjust the performance of the nanofiltration membrane and change the surface morphology and water treatment performance of the membrane. When the addition amount of 1,3-bis (N-sulfinamide) benzene is between 0 and 0.03%, the rejection of sodium chloride solution to sodium chloride solution decreases and the water flux increases. When 1,3-bis N-sulfinamide) benzene is added in the range of 0.03% ~ 0.06%, the nanofiltration membrane retention rate of sodium chloride solution basically unchanged, water flux decreased. Finally, the mechanism of the sulfenamide group in the interfacial reaction was discussed.