Polyhydroxy Group Functionalized Zwitterion for a Polyamide Nanofiltration Membrane with High Water Permeation and Antifouling Performance,ACS Applied Polymer Materials

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Polyhydroxy Group Functionalized Zwitterion for a Polyamide Nanofiltration Membrane with High Water Permeation and Antifouling Performance
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-08-14 , DOI: 10.1021/acsapm.0c00551
Ao Li ₁ , Qingqing Rao ₁ , Fugen Liang ₂ , Lina Song ₁ , Xiaoli Zhan _{1,

3,

4} , Fengqiu Chen ₁ , Jian Chen ₅ , Qinghua Zhang _{1,

3,

4}

Affiliation

Nanofiltration (NF) membranes have attracted significant attention owing to their widespread applications in water treatment and seawater desalination. However, challenges still remain in improving their antifouling performance and water permeation. Here, a sulfobetaine-based zwitterion with polyhydroxy groups was designed and synthesized successfully. Then, the NF membranes were modified by the reaction of the hydroxyl group of the zwitterion and the acid chloride group on the surface of the initial NF membrane. Hence, the hydrophilicity of the NF membrane was significantly enhanced and resulted in the high promotion of nanofiltration performance and antifouling property. Besides, the flux of the modified NF membrane (A2) reached 9.28 L m^–2 h^–1 bar^–1, which was 2.2 times higher than the flux of pristine NF membrane (A0). Nevertheless, the rejection showed a slight decrease. Also, the modified NF membrane possessed excellent fouling resistance to protein; the flux recovery ratio was nearly 98% after the membrane was treated with bovine serum albumin for 2.5 cycles. The excellent water flux and fouling resistance of this NF membrane advanced its application in wastewater treatment.

中文翻译：

具有高水渗透性和防污性能的聚酰胺纳米滤膜的多羟基官能化两性离子

纳滤（NF）膜由于在水处理和海水淡化中的广泛应用而引起了广泛的关注。然而，在提高其防污性能和水渗透性方面仍然存在挑战。在这里，成功设计并合成了具有多羟基的磺基甜菜碱两性离子。然后，通过两性离子的羟基与初始NF膜表面上的酰氯基团的反应来修饰NF膜。因此，NF膜的亲水性显着增强，并导致纳米过滤性能和防污性能的高度促进。此外，改性NF膜（A2）的通量达到9.28 L m ^–2 h ^–1 bar ^–1，是原始NF膜（A0）通量的2.2倍。但是，拒绝率略有下降。而且，改性的NF膜对蛋白质具有优异的抗污垢性。用牛血清白蛋白处理2.5个膜后，通量回收率接近98％。这种NF膜的优异的水通量和耐污性使其在废水处理中得到了进一步的应用。

更新日期：2020-09-11

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