表面接枝TAPI改善聚酰胺纳滤膜的耐氯性能  

Improvement of chlorine resistance of polyamide nanofiltration membrane by surface grafting TAPI

作　　者：嵇华忠 韩家凯 钱璟俐 刘大朋 洪耀良 JI Huazhong;HAN Jiakai;QIAN Jingli;LIU Dapeng;HONG Yaoliang(School of Environment Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Collaborative Innovation Center of Water Treatment Technology and Material,Suzhou University of Science and Technology,Suzhou 215009,China)

机构地区：[1]苏州科技大学环境科学与工程学院,苏州215009 [2]水处理技术与材料协同创新中心,苏州215009

出　　处：《膜科学与技术》2023年第2期87-94,共8页Membrane Science and Technology

基　　金：国家自然科学基金项目(51908394)。

摘　　要：为了改善聚酰胺纳滤膜的耐氯性,通过表面改性将2,4,6-三氨基嘧啶(TAPI)接枝到聚酰胺膜表面,利用ATR-FTIR、SEM和接触角测定仪等手段对改性膜进行表征.结果表明,在TAPI最优质量分数为0.3%,最佳反应时间为3 min时,改性膜在0.4 MPa操作压力下,纯水通量为43.52 L/(m^(2)·h),对Na_(2)SO_(4)、MgSO_(4)、NaCl和MgCl_(2)的截留率分别为95.30%、88.04%、45.32%、34.04%.pH=3.5、7、10.5下的氯化实验中,改性膜的通量损失量均比哌嗪基纳滤膜减少20 L/(m^(2)·h),并且对Na_(2)SO_(4)截留率保持稳定在95%以上.In order to improve the chlorine resistance of polyamide nanofiltration membrane,2,4,6-triaminopyrimidine(TAPI)was grafted onto the surface of polyamide membrane by surface modification.The modified membrane was characterized by ATR-FTIR,SEM and contact angle tester.The results showed that when the optimal mass fraction of TAPI was 0.3%and the optimal reaction time was 3 min,the pure water flux of the modified membrane was 43.52 L/(m^(2)·h)at 0.4 MPa operating pressure,and the retention rates of Na_(2)SO_(4),MgSO_(4),NaCl and MgCl_(2)were 95.30%,88.04%,45.32%and 34.04%respectively.In the chlorination experiment at pH=3.5,7 and 10.5,the flux loss of the modified membrane was reduced by 20 L/(m^(2)·h)compared with that of the piperazine based nanofiltration membrane,and the rejection rate of Na_(2)SO_(4)remained stable above 95%.

关 键 词：界面聚合 纳滤 表面接枝改性 TAPI 耐氯 

分 类 号：TQ028.8[化学工程]