Laboratory of High Performance Plastics (Jilin University), Ministry of Education, National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.
Laboratory of High Performance Plastics (Jilin University), Ministry of Education, National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.
J Colloid Interface Sci. 2022 Mar 15;610:905-912. doi: 10.1016/j.jcis.2021.11.147. Epub 2021 Nov 26.
Membrane fouling during the use of separation membrane has always been the main reason for the degradation of membrane performance. The traditional solution is complicated and inefficient, so we proposed multi-step integration method to prepare antifouling zwitterionic poly(aryl ether sulfone) (PAES-Z-x) ultrafiltration (UF) membrane with higher efficiency. We designed and synthesized a bisphenol precursor containing tertiary amine groups, which could provide reactive sites for grafting zwitterionic group. Afterwards, the zwitterionic modified UF membrane was prepared by graft copolymerization and non-solvent-induced phase separation (NIPS). The morphology, hydrophilicity, water flux and rejection of the PAES-Z-x membrane could be optimized by tuning zwitterion content. The hydration layer formed by zwitterions effectively reduced the adsorption of proteins and endowed the membrane good antifouling properties. The resulting membrane showed the pure water flux increased (up to 311 L mh bar), high bovine serum albumin (BSA) rejection (97%) and good water flux recovery ratio (FRR) (82.8%). Zwitterionic antifouling PAES UF membrane prepared by a simple and effective method provided a new direction for improving PAES UF membrane's antifouling performance.
在分离膜的使用过程中，膜污染一直是导致膜性能下降的主要原因。传统的解决方案复杂且效率低下，因此我们提出了多步集成方法，以制备具有更高效率的抗污染两性离子聚芳醚砜（PAES-Z-x）超滤（UF）膜。我们设计并合成了一种含有叔胺基团的双酚前体，它可以为接枝两性离子基团提供反应位点。然后，通过接枝共聚和非溶剂致相分离（NIPS）制备了两性离子改性 UF 膜。通过调整两性离子含量，可以优化 PAES-Z-x 膜的形态、亲水性、水通量和截留率。两性离子形成的水合层可以有效减少蛋白质的吸附，赋予膜良好的抗污染性能。所得膜的纯水通量增加（高达 311 L mh bar），牛血清白蛋白（BSA）截留率高（97%），水通量恢复率（FRR）好（82.8%）。通过简单有效的方法制备的两性离子抗污染 PAES UF 膜为提高 PAES UF 膜的抗污染性能提供了新的方向。
