Improving the water flux and bio-fouling resistance of reverse osmosis (RO) membrane through surface modification by zwitterionic polymer

Wang, Jing; Wang, Zhi; Wang, Jixiao; Wang, Shichang

doi:10.1016/j.memsci.2015.06.036

Cited by 156 publications

(54 citation statements)

References 47 publications

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“…To reduce the problem of initial fouling different approaches for surface hydrophilization have been investigated such as copolymerization or grafting with hydrophilic monomers [8][9][10][11][12][13][14], blending using hydrophilic polymers [15][16][17][18][19][20], and, finally, chemical modification of the membrane polymer [21].…”

Section: Polymers 2015 7mentioning

confidence: 99%

Biocatalytic Self-Cleaning Polymer Membranes

et al. 2015

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Polymer membrane surfaces have been equipped with the digestive enzyme trypsin. Enzyme immobilization was performed by electron beam irradiation in aqueous media within a one-step method. Using this method, trypsin was covalently and side-unspecific attached to the membrane surface. Thus, the use of preceding polymer functionalization and the use of toxic solvents or reagents can be avoided. The resulting membranes showed significantly improved antifouling properties as demonstrated by repeated filtration of protein solutions. Furthermore, the biocatalytic membrane can be simply "switched on" to actively degrade a fouling layer on the membrane surface and regain the initial permeability. The membrane pore structure (pore size and porosity) was neither damaged by the electron beam treatment nor blocked by the enzyme loading, ensuring a stable membrane performance.

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Section: Polymers 2015 7mentioning

confidence: 99%

Biocatalytic Self-Cleaning Polymer Membranes

et al. 2015

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“…[105][106][107] Wang et al have modified ac ommercial RO membrane with carboxybetaine methacrylate (CBMA) zwitterionicp olymer containingq uaternary ammonium cationsb yr edox-initiated graft polymerizationo fN,N'dimethylaminoethyl methacrylate (DMAEMA), followed by as urface quaternization reaction with 3-bromopropionic acid (3-BPA) to improve the water flux and biofoulingr esistance simultaneously. [104] Thew ater flux recoveryo ft he modified membrane is much higher than that of the unmodifiedR O membrane,a nd almostc omplete removal (99 %) of Gram-positivea nd Gram-negative bacteria by bacteriostasis mechanisms is observed. Despite the advancements in surface modifications,i ncorporation of nanomaterialsi ss till the mainstream of RO membrane research.…”

Section: Membrane Design and Performances In Desalinationmentioning

confidence: 96%

“…Surface-initiated atom-transfer radical polymerization, initiated chemical vapor deposition, andc oncentration-polarization-enhanced graft polymerization are some of the methods that are typically used to coat or graft zwitterionic polymers on the membrane surface. [104,105] Particularly,o wing to strong and stable electrostatic bonds with water, this modification approachi s viably used to improve the anti-biofouling properties of RO TFC membranes. [105][106][107] Wang et al have modified ac ommercial RO membrane with carboxybetaine methacrylate (CBMA) zwitterionicp olymer containingq uaternary ammonium cationsb yr edox-initiated graft polymerizationo fN,N'dimethylaminoethyl methacrylate (DMAEMA), followed by as urface quaternization reaction with 3-bromopropionic acid (3-BPA) to improve the water flux and biofoulingr esistance simultaneously.…”

Section: Membrane Design and Performances In Desalinationmentioning

confidence: 99%

The Water–Energy Nexus: Solutions towards Energy‐Efficient Desalination

et al. 2017

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Global water shortages across all continents have led to the explosive practice of desalination. However, desalination is undeniably recognized as one of the most energy‐intensive techniques for creating a clean and safe water supply. Cost reduction in different aspects is necessary to make desalination processes affordable and accessible. In fact, the cost of water from desalination facilities is momentously impacted by the energy requirements for water production. As the water production cost cannot be separated from the issue of energy, the desalination community is continuously seeking ways to reduce energy consumption further. Current research focuses on assessing and alleviating the major energy issues by finding ways to improve the energy efficiency of desalination facilities, which would pave the way for overall cost reduction. Improving the process and the efficiencies of materials implies improved water quality and an increase in the quantity produced per unit of energy consumed. This review highlights recent emerging approaches that aim to reduce the energy consumption and, hence, the water production cost of desalination technology. In brief, the advances made in membrane science and technology, the development of emerging desalination processes and their integrated systems, as well as the use of renewable energy and energy‐recovery systems are recognized as effective and feasible solutions towards energy‐efficient desalination to address the water crisis.

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“…5d), illustrating that the surface is more hydrophilic surface, thereby favoring the reduction in membrane fouling by hydrophobic foulants. 57 On the other hand, based on the Donnan exclusion theory, 58,59 strong electrostatic repulsion exists between multivalent anions (SO 4…”

Section: Permselectivity Of Inorganic Saltsmentioning

confidence: 99%