• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Polyimide thin film composite (TFC) membranes via?interfacial polymerization on hydrolyzed polyacrylonitrile support for solvent resistant nanofiltration
【24h】

Polyimide thin film composite (TFC) membranes via?interfacial polymerization on hydrolyzed polyacrylonitrile support for solvent resistant nanofiltration

机译：通过水解聚丙烯腈载体上的界面聚合通过聚酰亚胺薄膜复合（TFC）膜进行耐溶剂纳滤

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Highly permeable, selective and solvent resistant nanofiltration (SRNF) membranes are desirable for the separation of substances on a molecular level in organic solvent. Polyimides have attracted significant attention for their chemical, structural and thermal stability. In this work, hydrolyzed polyacrylonitrile–polyamide acid (H-PAN/PAA) composite membranes were prepared via interfacial polymerization of m-phenylenediamine (MPD) and 1,2,4,5-benzenetetra acyl chloride (BTAC) on hydrolyzed polyacrylonitrile (H-PAN) supports. The formed H-PAN/PAA membranes were then transformed into H-PAN/PI thin film composite (TFC) membranes by a chemical imidization method. The effects of acetone as co-solvent in organic phase solution, the additives in the aqueous solution and the imidization time on the performance of the prepared PI TFC membranes were investigated. The chemical composition and the morphology of the prepared composite membranes were characterized by using FTIR, SEM and AFM. The hydrophilicity of the membrane surface was also measured. Using Rhodamine B (RB) with molecular weight (MW) of 479 dalton (Da) and Coomassie brilliant blue (CBB) G250 (MW = 854 Da) as model chemicals, the rejections of the prepared SRNF membranes for 100 mg L?1 of RB–ethanol solution and CBB G250–ethanol solution were about 92.8% and 99%, respectively. Their ethanol permeances were about 0.79 L m?2 h?1 bar?1 and 0.69 L m?2 h?1 bar?1, respectively. After being immersed respectively into CCl4, toluene, ethanol, acetone and methanol pure solvents for 30 days, the rejections of the prepared SRNF membranes remained quite stable.
机译：对于有机溶剂中分子水平的物质分离，需要具有高渗透性，选择性和耐溶剂性的纳滤（SRNF）膜。聚酰亚胺的化学，结构和热稳定性已引起广泛关注。在这项工作中，通过 m -苯二胺（MPD）和1,2,4的界面聚合制备了水解聚丙烯腈-聚酰胺酸（H-PAN / PAA）复合膜水解聚丙烯腈（H-PAN）载体上的1,5-苯四酰氯（BTAC）。然后通过化学酰亚胺化方法将形成的H-PAN / PAA膜转化为H-PAN / PI薄膜复合（TFC）膜。研究了丙酮作为共溶剂的有机相溶液，水溶液中的添加剂和酰亚胺化时间对制备的PI TFC膜性能的影响。用FTIR，SEM和AFM对制备的复合膜的化学组成和形貌进行表征。还测量了膜表面的亲水性。使用分子量（MW）为479道尔顿（Da）的罗丹明B（RB）和考马斯亮蓝（CBB）G250（MW = 854 Da）作为模型化学药品，制备的SRNF膜对100 mg L的排斥率 RB-乙醇溶液和CBB G250-乙醇溶液的？1 分别约为92.8％和99％。它们的乙醇渗透率约为0.79 L m ？2 h ？1 bar ？1 和0.69 L m ？2 h ？1 bar < sup>？1 。分别浸入CCl 4 ，甲苯，乙醇，丙酮和甲醇的纯溶剂中30天后，所制备的SRNF膜的截留率保持相当稳定。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号