Thin film composite forward osmosis membranes based on polydopamine modified polysulfone substrates with enhancements in both water flux and salt rejection

Han, Gang; Zhang, Sui; Li, Xue; Widjojo, Natalia; Chung, Tai‐Shung

doi:10.1016/j.ces.2012.05.033

Cited by 332 publications

(158 citation statements)

References 56 publications

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“…2. Both pure PA TFC and GO modified TFC membranes displayed ridge-valley surface structure, similar to the structure observed on the surfaces of other TFC and thin film nanocomposite (TFN) membranes [17,[30][31][32]. Furthermore, the surface of the GO modified TFC membranes appeared to be denser than that of the pure PA TFC membrane.…”

Section: Characterization Of the Tfc/go Membranessupporting

confidence: 60%

Preparation of graphene oxide modified polyamide thin film composite membranes with improved hydrophilicity for natural organic matter removal

Xia

Yao

Zhao

et al. 2015

Chemical Engineering Journal

186

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Section: Characterization Of the Tfc/go Membranessupporting

confidence: 60%

Preparation of graphene oxide modified polyamide thin film composite membranes with improved hydrophilicity for natural organic matter removal

Xia

Yao

Zhao

et al. 2015

Chemical Engineering Journal

186

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“…This may be attributed to the blocking of surface pores by the accumulation of coating material on membrane surface as confirmed by membranes surface morphologies. This result agree with literature [21], [38], [42] & [44].…”

Section: Water Uptake and Porosity Of Surface Fo Modified Membranesupporting

confidence: 83%

“…Also, as illustrated previously, the decline of membrane performance by increasing coating concentration above 0.75 g/l can be attributed to the accumulation of coating material on membrane surface that leading to surface pores blocking as confirmed by membranes surface morphologies. This is in good agreement with literature [21], [38], [42] & [44]. In addition, it was observed that high flux value was obtained in the beginning of operation, then it decreased gradually by increasing of permeation time till 3 hours, this can be attributed to dilution of DS with time that reducing osmotic pressure difference.…”

Section: Water and Reverse Salt Flux At Different Additive Concentratsupporting

confidence: 80%

Enhancement of nonwoven cellulose triacetate forward-osmosis membranes by surface coating modification

Aly¹,

Gadallah²,

Ali³

et al. 2017

IJET

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Forward osmosis (FO) is considered as one of the emerging techniques in membrane technology. The enhancement of FO performance is governed by two major factors: the first one is development of high-performance draw solutions and the second is utilizing of high efficient FO membranes. The aim of this work is to investigate chemical surface coating modification of commercial nonwoven forward osmosis membrane with new hydrophilic coating materials namely, o-phenylene di-amine and benzoyl chloride. The effect of coating addition at different concentrations was studied. The membrane morphology and chemical structure characterization of modified membranes proved the formation of dense layer and higher membrane porosity. Finally, it was demonstrated that increasing of coating material concentration gradually increases porosity and membrane performance till 0.75 g/l. By further increasing of coating materials, the porosity and membrane performance tend to decrease.

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“…2017, 7, 81 9 of 15 surface roughness of the polydopamine-modified membrane is higher than the other membranes, the protein molecules cannot easily attach on the membrane surfaces. As suggested by Han et al [38], the pore size of the polydopamine-modified surfaces is around 1.5 nm. The dimension of the prolate ellipsoid BSA is 14 nm for the major axis and 4 nm for the minor axis [39], which is significantly larger than the pore size of the polydopamine.…”

Section: Filtration Performance Under Dark Conditionsmentioning

confidence: 63%

Remarkable Anti-Fouling Performance of TiO2-Modified TFC Membranes with Mussel-Inspired Polydopamine Binding

et al. 2017

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It has been proven that a versatile bio-glue, polydopamine, can firmly bind TiO 2 (titanium dioxide) nanoparticles on thin film composite (TFC) membranes. In this work, the anti-fouling behaviour of this novel polydopamine-TiO 2 -modified membrane is evaluated, based on the static bovine serum albumin (BSA) surface adhesion of the membranes and the relative flux decline. The results show that the anti-fouling performance of this new membrane is significantly improved in dark conditions when compared with the neat TFC membrane and the membranes only modified by polydopamine or TiO 2 . When filtrating a 0.5 g·L −1 BSA solution in dark conditions, the flux of the polydopamine-TiO 2 -modified membrane remains constant, at 95% of its pure water flux after 30 min filtration for 8 h of the experiment. This indicates a significant increase in anti-fouling performance when compared to the 25% flux decline observed for the neat TFC membrane, and to the 15% flux decline of those only modified by polydopamine or TiO 2 . This remarkable anti-fouling behaviour is attributed to an improved and uniform hydrophilicity, due to the presence of TiO 2 and to the regular nanosized papillae structure of the polydopamine-TiO 2 coating. Furthermore, since dopamine-modified TiO 2 has visible light-induced photocatalytic properties, the membrane's photocatalytic performance was also tested in light conditions. However an increase of flux and decrease of retention were observed after 24 h of continuous illumination, indicating that light may also affect the top layer of the membrane.

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Thin film composite forward osmosis membranes based on polydopamine modified polysulfone substrates with enhancements in both water flux and salt rejection

Cited by 332 publications

References 56 publications

Preparation of graphene oxide modified polyamide thin film composite membranes with improved hydrophilicity for natural organic matter removal

Preparation of graphene oxide modified polyamide thin film composite membranes with improved hydrophilicity for natural organic matter removal

Enhancement of nonwoven cellulose triacetate forward-osmosis membranes by surface coating modification

Remarkable Anti-Fouling Performance of TiO2-Modified TFC Membranes with Mussel-Inspired Polydopamine Binding

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