G'/> Efficacy of antifouling modification of ultrafiltration membranes by grafting zwitterionic polymer brushes
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >Efficacy of antifouling modification of ultrafiltration membranes by grafting zwitterionic polymer brushes
【24h】

Efficacy of antifouling modification of ultrafiltration membranes by grafting zwitterionic polymer brushes

机译：嫁接两性离子聚合物刷防污改性超滤膜的疗效

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Graphical abstractDisplay OmittedHighlights?We grafted zwitterionic polymer brushes on UF membrane and pore surfaces via ATRP.?A large brush layer thickness (>100nm) is required to prevent fouling.?Both surface and interior pore modified membranes showed similar fouling behavior.?Pore size limits the efficacy of grafting non-fouling brushes to UF interior surface.AbstractWe studied the efficacy of grafting zwitterionic polymer brushes for the antifouling modification of ultrafiltration (UF) membranes. Poly(vinylidene fluoride) (PVDF) UF membranes were modified by surface initiated atom transfer radical polymerization (SI-ATRP) to graft poly(sulfobetaine methacrylate) (PSBMA) brushes to the membrane surface. Protein adsorption tests and chemical force microscopy show that a large brush layer thickness (greater than 100nm) is necessary in order to impart effective fouling resistance. In dynamic fouling experiments with bovine serum albumin (BSA) asa model foulant, however, the modified membranes exhibited only a slight increase of flux recovery after fouling compared to pristine PVDF membranes. Despite the thick PSBMA brush layer, this low water flux recovery indicates that internal fouling takes place within the membrane pores. To prevent internal fouling, we grafted PSBMA brushes to both the surface and internal structure of the membranes. Nevertheless, dynamic fouling experiments again showed only a minute improvement in water flux recovery. While a thick brush layer is required for effective fouling resistance, we note that the small pore size of UF membranes imposes a fundamental limit on the brush layer thickness inside the pores. Finally, we discuss the challenges of polymer brush grafting for antifouling UF membrane modification and suggest possible alternative methods to create fouling resistant UF membranes.]]>
机译：<！[cdata [ 图形摘要 显示省略 突出显示 < CE：简单段ID =“SP0010”View =“全部”> ？ 我们通过ATRP接枝紫外线聚合物刷和孔隙表面。 ？ 预先需要大刷层厚度（> 100nm） nt fouling。 ？ 表面和内部孔改性膜显示出类似的污垢行为。 ？ 孔径限制了嫁接非结垢刷对UF内表面的功效。 抽象 我们研究了嫁接两性离子聚合物刷的疗效，用于超滤（UF）膜的防污改性。通过表面引发的原子转移自由基聚合（Si-ATRP）将聚（偏二氟乙烯）（PVDF）UF膜转移到膜表面上的接枝聚（Sulfobetaine甲基丙烯酸酯）（PSBMA）刷。蛋白质吸附试验和化学力显微镜表明，为了赋予有效的污垢阻力，需要大的刷层厚度（大于100nm）。然而，在牛血清白蛋白（BSA）的动态污垢实验中，其模型污垢，但改性膜仅与原始PVDF膜相比污染后的助焊剂恢复略微增加。尽管厚的PSBMA刷层，但这种低水量恢复表明内部污染在膜孔内发生。为防止内部污垢，我们将PSBMA刷子接枝到膜的表面和内部结构。然而，动态结垢实验再次显示出水通量回收的微小改善。虽然需要一种有效的污垢抗性所必需的厚刷层，但我们注意到UF膜的小孔径对孔内的刷层厚度施加了基本限制。最后，我们讨论了聚合物刷移植用于防污UF膜修饰的挑战，并提出了产生污垢抗性UF膜的可能替代方法。 ] ]

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