Modification of thin film composite polyamide membranes with 3D hyperbranched polyglycerol for simultaneous improvement in their filtration performance and antifouling properties,Journal of Materials Chemistry A

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Modification of thin film composite polyamide membranes with 3D hyperbranched polyglycerol for simultaneous improvement in their filtration performance and antifouling properties
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-10-16 00:00:00 , DOI: 10.1039/c7ta07335f
Zhongyun Liu _{1,

2,

3,

4,

5} , Xiaochan An _{5,

6,

7,

8,

9} , Chunhong Dong _{5,

6,

7,

8,

9} , Sunxiang Zheng _{10,

11,

12,

13} , Baoxia Mi _{10,

11,

12,

13} , Yunxia Hu _{1,

2,

3,

4,

5}

Affiliation

This study investigated a novel surface modification strategy for thin film composite (TFC) polyamide membranes using hyperbranched polyglycerol (hPG), which is not only super-hydrophilic to mitigate fouling, but also has a unique three-dimensional globular architecture to enhance water transport. Membrane surface modification with hydrophilic polymers has been shown to improve the membrane fouling resistance, but often at the expense of decreased water flux. To solve this dilemma, a highly permeable antifouling layer was created by grafting hPG onto the polyamide surface of a TFC membrane via a layer-by-layer interfacial polymerization method. The grafted hPG remarkably enhanced the hydrophilicity of the TFC polyamide surfaces, resulting in an extremely low water contact angle (16.4°), and significantly increased the water permeability by 41.5% compared to pristine TFC membranes. Furthermore, the hPG-grafted TFC polyamide membrane exhibited an improved antifouling performance with both reduced BSA protein adsorption in static fouling experiments and lower water flux decline in dynamic fouling tests. Therefore, our work sheds light on using novel 3D hyperbranched polymers for effectively and efficiently engineering membrane surfaces to simultaneously improve their antifouling properties and filtration performances in forward osmosis membrane processes.

中文翻译：

用3D超支化聚甘油改性薄膜复合聚酰胺膜，以同时提高其过滤性能和防污性能

这项研究研究了使用超支化聚甘油（hPG）的薄膜复合材料（TFC）聚酰胺膜的新型表面改性策略，该策略不仅具有超亲水性以减轻结垢，而且具有独特的三维球状结构以增强水的传输。已经表明用亲水性聚合物对膜进行表面改性可以提高膜的抗污性，但通常以降低水通量为代价。为了解决这一难题，高渗透性防污层是由接枝的hPG到TFC膜的聚酰胺表面上产生经由逐层界面聚合法。与原始的TFC膜相比，接枝的hPG显着增强了TFC聚酰胺表面的亲水性，从而导致极低的水接触角（16.4°），并显着提高了41.5％的水渗透性。此外，hPG接枝的TFC聚酰胺膜表现出改善的防污性能，在静态污垢实验中降低了BSA蛋白的吸附，在动态污垢实验中降低了水通量的下降。因此，我们的工作为使用新型3D超支化聚合物有效而高效地改造膜表面，同时在正向渗透膜工艺中改善其防污性能和过滤性能提供了启示。

更新日期：2017-11-01

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