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Recent Patents on Engineering

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ISSN (Print): 1872-2121
ISSN (Online): 2212-4047

Review Article

Graphene-Based Ultrafiltration Membranes for Separation: Synthesis and Applications

Author(s): Xu Zhang, Zehai Xu, Ling Wang, Xinyan Wang, Yong Zeng and Guoliang Zhang*

Volume 12, Issue 1, 2018

Page: [37 - 45] Pages: 9

DOI: 10.2174/1872212111666170418115916

Price: $65

Abstract

Background: Water treatment, important for maintaining clean water among other applications, is still a challenge to improve remediation technologies for eliminating pollution. Ultrafiltration, as one kind of membrane separation processes which play a vital role in water treatment, has been attracted extensive attention for its merits of high-efficiency, low-cost and energy-saving. However, some drawbacks still restrict the application, including poor hydrophilicity, low permeability and severe membrane fouling. Thus, improving the performances of the ultrafiltration membrane is urgently required.

Methods: This paper reviews recent literatures and patents on the synthesis and applications of graphene-based ultrafiltration membranes. The goal in this work is to provide deep insight into the selection of graphene-based materials, structural design and methods of graphene-based mixed-matrix membranes (MMMs) and the substrate supported graphene-based membranes.

Results: Various drawbacks in traditional ultrafiltration membranes such as obvious protein adsorption, severe membrane fouling and poor hydrophilicity can be reduced through incorporating graphene-based nanomaterials into polymer membranes. It is confirmed by putting forward to some applications in water purification, antibacterial membranes, membrane bioreactors and protein separation.

Conclusion: Graphene-based materials introduced into membrane materials have shown that they can effectively increase the permeability, antifouling and antibacterial properties of membranes. In this review, we anticipate to provide a useful insight into the design and synthesis of graphene-based ultrafiltration membranes, and hope that a new avenue can be opened to develop high quality ultrafiltration membranes in separation process.

Keywords: Graphene-based materials, ultrafiltration, membrane separation, water treatment, antibacterial efficiency, pollution.

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