Acryloylmorpholine-Grafted PVDF Membrane with Improved Protein Fouling Resistance

Abstract To enhance the anti-fouling and separating properties of polyvinylidene fluoride (PVDF) membranes, an amphiphilic copolymer of methyl methacrylate and 2-acrylamido-2-methylpropane sulfonic acid, poly(MMA-co-AMPS), was designed and synthesized. Through a phase-inversion process, the poly(MMA-co-AMPS) were fully dispersed in the PVDF membrane. The properties of membrane including the surface and cross-section morphology, surface wettability and fouling resistance under different pH solutions were investigated. Compared to the unmodified PVDF membranes, the contact angles of modified PVDF membranes decreased from 80.6° to 71.6°, and the pure water flux increased from 54 to 71 L·m−2·h−1. In addition, the hybrid PVDF membrane containing 0.5 wt% copolymers demonstrated an larger permeability, better fouling resistance and higher recovery ratio via pure water backlashing, when it was compared with the other blend membranes, and the virgin one in the cyclic test of anti-fouling. The modified membranes with the copolymers possessed an outstanding performance and may be used for further water treatment applications.

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In-situ combined dual-layer CNT/PVDF membrane for electrically-enhanced fouling resistance

Journal of Membrane Science ◽

10.1016/j.memsci.2015.05.014 ◽

2015 ◽

Vol 491 ◽

pp. 37-44 ◽

Cited By ~ 61

Author(s):

Shu Wang ◽

Shuai Liang ◽

Peng Liang ◽

Xiaoyuan Zhang ◽

Jianyu Sun ◽

...

Keyword(s):

Fouling Resistance ◽

Pvdf Membrane ◽

Electrically Enhanced

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Fouling Resistance of PVDF-Fabric Composite Membrane in Membrane Distillation Desalination

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.150-151.334 ◽

2010 ◽

Vol 150-151 ◽

pp. 334-339 ◽

Cited By ~ 2

Author(s):

Rui Ting Huo ◽

Zhen Ya Gu ◽

Kai Jie Zuo ◽

Guang Ming Zhao

Keyword(s):

Composite Membrane ◽

Saline Water ◽

Membrane Distillation ◽

Fouling Resistance ◽

Pvdf Membrane ◽

Membrane Layer ◽

Air Gap Membrane Distillation ◽

Fabric Composite ◽

Fabric Layer ◽

Fabric Surface

The strength and the fouling resistance of PVDF membrane prepared by wet phase inversion process can be improved by an innovation in membrane preparation. The prepared flat-sheet PVDF-fabric composite membrane consists of a fabric layer and a PVDF membrane layer. The fouling resistance of the composite membrane in membrane distillation (MD) desalination was investigated by air gap membrane distillation (AGMD), using simulated saline water and high concentration NaCl solution as the feed solutions respectively. The experimental results showed that the water-and-oil repellent finishing of the fabric support had a significant effect on the bonding strength and the fouling resistance of the composite membrane. With the protection of the fabric layer for the PVDF membrane layer, the composite membrane exhibited better fouling resistance as its fabric surface was in contact with the feed solution in MD process, when the fabric support was finished with 2g/L FK-501.

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