Surface Modifications for Antifouling Membranes

Rana, Dipak; Matsuura, Takeshi

doi:10.1021/cr800208y

Cited by 1,930 publications

(1,110 citation statements)

References 371 publications

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“…The poly(EDOT-PC) films exhibited no adhesion (Fig. 2b); their resistance towards the adhesion of both proteins and cells most likely resulted from the highly hydrophilic yet net-neutral properties of the zwitterionic groups on their surfaces 59 . The poly(EDOT-PC) films retained their good cell resistance after exposure for 30 days to a medium containing 10% horse serum and 10% FBS, suggesting that films deposited from the monomer EDOT-PC would be promising for long-term recording applications.…”

Section: Resultsmentioning

confidence: 99%

Large enhancement in neurite outgrowth on a cell membrane-mimicking conducting polymer

et al. 2014

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Although electrically stimulated neurite outgrowth on bioelectronic devices is a promising means of nerve regeneration, immunogenic scar formation can insulate electrodes from targeted cells and tissues, thereby reducing the lifetime of the device. Ideally, an electrode material capable of electrically interfacing with neurons selectively and efficiently would be integrated without being recognized by the immune system and minimize its response. Here we develop a cell membrane-mimicking conducting polymer possessing several attractive features. This polymer displays high resistance towards nonspecific enzyme/cell binding and recognizes targeted cells specifically to allow intimate electrical communication over long periods of time. Its low electrical impedance relays electrical signals efficiently. This material is capable to integrate biochemical and electrical stimulation to promote neural cellular behaviour. Neurite outgrowth is enhanced greatly on this new conducting polymer; in addition, electrically stimulated secretion of proteins from primary Schwann cells can also occur on it.

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Section: Resultsmentioning

confidence: 99%

Large enhancement in neurite outgrowth on a cell membrane-mimicking conducting polymer

et al. 2014

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“…The organic compounds synthesized in this work were fully characterized by 1 H NMR, 13 C NMR and FT-IR spectroscopies. IR data were taken with Perkin Elmer Paragon 1000 PC FT-IR spectrometer.…”

Section: Generalmentioning

confidence: 99%

“…Surface modification techniques are, in particular, aimed at reducing membrane fouling (caused by the accumulation of organic substances on membrane surface) or biofouling (caused by accumulation of biomolecules or even microorganisms on membrane surface) by acting on parameters strongly related to this phenomena, such as membrane roughness, hydrophilicity, and membrane charge [12,13].…”

Section: Introductionmentioning

confidence: 99%

A step forward to a more efficient wastewater treatment by membrane surface modification via polymerizable bicontinuous microemulsion

Galiano

Figoli

Deowan

et al. 2015

Journal of Membrane Science

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a b s t r a c tAn innovative hydrophilic and anti-fouling coating material for application in membrane technology for wastewater treatment has been developed by polymerization of a polymerizable bicontinuous microemulsion (PBM) and used for surface modification of a commercial flat polyethersulfone (PES) membrane. The novel nanostructured coating has been produced using acryloyloxyundecyltriethylammonium bromide (AUTEAB) as a co-polymerizable surfactant, obtained through a synthetic method characterized by a lower cost and a higher reproducibility compared to other known polymerizable surfactants. The novel composite membranes have been characterized and compared with the uncoated PES membranes. Coated membranes resulted in a smoother surface and a higher hydrophilicity with respect to the uncoated ones, and showed a particular nano-size channel-like morphology making them highly resistant to the fouling phenomenon. The covalent anchorage of the surfactant on the membrane surface ensured the embedment of the molecule in the polymeric matrix avoiding its leaching and also leading the coated membranes to have significant antimicrobial activity, which is very important for reducing the biofouling phenomenon.All these aspects make the tailored coating material an ideal and efficient coating for modifications of commercial membrane surfaces, to be used in membrane processes in wastewater treatment.

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“…Other strategies to control membrane fouling are mainly focused on surface modification of the membrane to weaken the interactive forces between foulants and membrane, thus inhibiting foulant adsorption. This can be achieved by altering the membrane surface charge, increasing the hydrophilicity or decreasing the surface roughness [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Preparation of multifunctional hollow fiber nanofiltration membranes by dynamic assembly of weak polyelectrolyte multilayers

Ilyas

English

Aimar

et al. 2017

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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A B S T R A C TIn this work, we investigate the effect of preparation conditions for dynamic layer-by-layer (LbL) coating, to prepare multifunctional hollow fiber nanofiltration (NF) membranes. Dynamic coating was performed at constant pressure and at variable cross flow speeds. In this way, polyelectrolyte multilayers (PEMs) were formed of the weak polyelectrolytes poly(acrylic acid) (PAA) and poly(allylamine hydrochloride) (PAH), on a negatively charged polyethersulfone ultrafiltration (UF) support. The resulting membrane performance was investigated and compared to membranes prepared by different methods (dip coating and dead end filtration), and it was found to be comparable. It was shown that PAH/ PAA multilayers can be fabricated reproducibly and homogenously using optimised dynamic LbL deposition conditions on single fiber module (surface area of 6.2 cm 2 ) as well as on a module of 15 fibers (surface area of 67 cm 2 ). Moreover, the approach of dynamic coating could be easily up scaled to coat existing UF modules. The prepared membranes reject the solutes on the basis of size exclusion and Donnan exclusion, retaining small organic solutes and divalent ions. Membranes terminated with PAA exhibit a low fouling tendency compared to membranes terminated with PAH and compared to the UF support membrane. Moreover, if severe membrane fouling would occur after prolonged use, the PEM coating, including any attached foulants can be removed by rinsing with a solution that combines a low pH and a high salinity (pH 3, 3 M). The surface of bovine serum albumin (BSA) fouled membranes were successfully cleaned at least twice, after which a new PEM coating could be re-applied by active coating.

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Surface Modifications for Antifouling Membranes

Cited by 1,930 publications

References 371 publications

Large enhancement in neurite outgrowth on a cell membrane-mimicking conducting polymer

Large enhancement in neurite outgrowth on a cell membrane-mimicking conducting polymer

A step forward to a more efficient wastewater treatment by membrane surface modification via polymerizable bicontinuous microemulsion

Preparation of multifunctional hollow fiber nanofiltration membranes by dynamic assembly of weak polyelectrolyte multilayers

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