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丝朊上接枝聚丙烯腈和聚丙烯酰胺复合过滤膜的性能

科技工作者之家 2019-01-24

《复合材料学报》优先在线发表论文。


  以高浓度ZnCl2水溶液为溶剂,采用氧化-还原引发体系,在丝朊(SF)上接枝丙烯腈(AN)和丙烯酰胺(AM)得到铸膜液,以水为凝固浴制备丝朊上接枝聚丙烯腈-聚丙烯酰胺(SF-g-P(AN-co-AM))复合过滤膜。通过SEM、TG和水接触角对SF-g-P(AN-co-AM)复合过滤膜进行表征,研究了膜的力学性能、分离性能和抗污染性能。结果表明,随着AM添加量的增加,SF-g-P(AN-co-AM)过滤膜的断裂强度逐渐增加,通量逐渐减少。当AM用量为0.5 g时,SF-g-P(AN-co-AM)复合过滤膜的断裂强度达到1.4 MPa,在0.1 MPa压力下,水通量为35 L/m2.h。该过滤膜具有良好的分离性能,对0.03 g/L刚果红(MW=696.68)溶液的截留率达到99%。SF-g-P(AN-co-AM)复合过滤膜具有良好的抗污染性能,未经清洗条件下,三次纯水及牛血清白蛋白溶液循环过滤后,通量恢复率还能达到94.44%。


关键词:丝朊;聚丙烯腈;聚丙烯酰胺;复合过滤膜;力学性能


Abstract: The silk graft polyacrylonitrile-polyacrylamide (SF-g-P(AN-co-AM)) composite filtration membrane was produced using zinc chloride aqueous solution as the solvent and using water as the coagulation bath. The SF-g-P(AN-co-AM) composite filtration membrane was characterized by SEM, TG analysis and water contact angle. The mechanical properties, separation performance and anti-fouling performance of the SF-g-P(AN-co-AM) membrane were tested. The results show that the fracture strength of the SF-g-P(AN-co-AM) membrane increases with the increasing of the acrylamide content, but the flux decreases. When 0.5 g of acrylamide is used, the fracture strength of the SF-g-P(AN-co-AM) membrane reaches 1.4 MPa, and the water flux is 35 L/m2 under 0.1 MPa pressure. The SF-g-P(AN-co-AM) membrane has good separation performance, and the rejection rate of 0.03 g/L Congo red (Mw=696.68) solution reaches 99%. The SF-g-P(AN-co-AM) membrane exhibits good anti-fouling performance, and the flux recovery rate is 94.44% after three cycles of pure water and bovine serum albumin solution filtration without cleaning.


Keywords: silk fibroin; polyacrylonitrile; polyacrylamide; composite filtration membrane; mechanical properties


作者:赵雨薇等,天津工业大学 分离膜与膜过程国家重点实验室, 天津

通讯作者:赵孔银天津工业大学 分离膜与膜过程国家重点实验室, 天津

全文详见中国知网学术期刊优先数字出版。


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来源:CSCM_OFFICE 中国复合材料学会

原文链接:https://mp.weixin.qq.com/s?__biz=MjM5MTA2NTk1Nw==&mid=2654408665&idx=3&sn=ef23f33233ae0809da3f0f7685d660a8&scene=0#wechat_redirect

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