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首页> 美国卫生研究院文献>Membranes >Preparation of Sulfobetaine-Grafted PVDF Hollow Fiber Membranes with a Stably Anti-Protein-Fouling Performance
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Preparation of Sulfobetaine-Grafted PVDF Hollow Fiber Membranes with a Stably Anti-Protein-Fouling Performance

机译：具有稳定的抗蛋白结垢性能的磺基甜菜碱接枝的PVDF中空纤维膜的制备

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Based on a two-step polymerization method, two sulfobetaine-based zwitterionic monomers, including 3-(methacryloylamino) propyl-dimethyl-(3-sulfopropyl) ammonium hydroxide (MPDSAH) and 2-(methacryloyloxyethyl) ethyl-dimethyl-(3-sulfopropyl) ammonium (MEDSA), were successfully grafted from poly(vinylidene fluoride) (PVDF) hollow fiber membrane surfaces in the presence of N,N′-methylene bisacrylamide (MBAA) as a cross-linking agent. The mechanical properties of the PVDF membrane were improved by the zwitterionic surface layers. The surface hydrophilicity of PVDF membranes was significantly enhanced and the polyMPDSAH-g-PVDF membrane showed a higher hydrophilicity due to the higher grafting amount. Compared to the polyMEDSA-g-PVDF membrane, the polyMPDSAH-g-PVDF membrane showed excellent significantly better anti-protein-fouling performance with a flux recovery ratio (RFR) higher than 90% during the cyclic filtration of a bovine serum albumin (BSA) solution. The polyMPDSAH-g-PVDF membrane showed an obvious electrolyte-responsive behavior and its protein-fouling-resistance performance was improved further during the filtration of the protein solution with 100 mmol/L of NaCl. After cleaned with a membrane cleaning solution for 16 days, the grafted MPDSAH layer on the PVDF membrane could be maintain without any chang; however, the polyMEDSA-g-PVDF membrane lost the grafted MEDSA layer after this treatment. Therefore, the amide group of sulfobetaine, which contributed significantly to the higher hydrophilicity and stability, was shown to be imperative in modifying the PVDF membrane for a stable anti-protein-fouling performance via the two-step polymerization method.
机译：基于两步聚合方法，基于磺基甜菜碱的两性离子单体包括3-（甲基丙烯酰氨基）丙基-二甲基-（3-磺丙基）氢氧化铵（MPDSAH）和2-（甲基丙烯酰氧基乙基）乙基-二甲基-（3-磺丙基）在N，N'-亚甲基双丙烯酰胺（MBAA）作为交联剂的情况下，成功地从聚偏二氟乙烯（PVDF）中空纤维膜表面接枝了铵（MEDSA）。两性离子表面层改善了PVDF膜的机械性能。 PVDF膜的表面亲水性显着增强，并且由于接枝量较高，polyMPDSAH-g-PVDF膜显示出更高的亲水性。与polyMEDSA-g-PVDF膜相比，polyMPDSAH-g-PVDF膜在循环过滤牛血清白蛋白（BSA）时表现出优异的抗污垢性能，通量回收率（RFR）高于90％。 ）解决方案。 polyMPDSAH-g-PVDF膜表现出明显的电解质响应行为，并且在用100 mmol / L NaCl过滤蛋白溶液期间，其抗蛋白结垢性能进一步提高。用膜清洗液清洗16天后，可以保持PVDF膜上的接枝MPDSAH层不变。然而，这种处理后，polyMEDSA-g-PVDF膜失去了嫁接的MEDSA层。因此，通过两步聚合方法，磺基甜菜碱的酰胺基对提高亲水性和稳定性起了重要作用，对于修饰PVDF膜以实现稳定的抗蛋白质污染性能至关重要。

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