Characterization of CO2 plasma treated polymeric membranes and quantification of flux enhancement

Pal, Swati; Ghatak, S.K.; De, Sirshendu; DasGupta, Sunando

doi:10.1016/j.memsci.2008.05.058

Cited by 30 publications

(10 citation statements)

References 42 publications

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“…Synthetic BSA solutions are frequently used to investigate UF membrane antifouling properties (Brink 1993, Chinpa 2010, Hosseini 2010, Kang 2008, Ma 2007, Pal 2008, Yu 2009. But they are quite different from an industrial wastewater stream, which usually contains large quantities of both organic and inorganic substances.…”

Section: Membrane Antifouling Property and Stabilitymentioning

confidence: 99%

“…To mitigate this problem and promote UF technology applications, surface modification has been considered as a potential route to prepare membranes with better antifouling properties by improving the hydrophilicity, roughness, and/or charge properties of membrane surface. Various modification methods including physical adsorption and chemical bond formation were used by researchers (Basri 2011, Boributh 2009, Brink 1993, Chinpa 2010, Hosseini 2010, Kang 2008, Kavitskaya 2005, Ma 2007, Morel 1997, Pal 2008, Reddy 2003, Yu 2009. Considered a long-term effect, covalent grafting by chemical coupling (Chinpa 2010, Ma 2007, UV-induced (Kang 2008, Yu 2009 or plasma-initiated methods (Hosseini 2010, Pal 2008 were desirable to increase antifouling properties.…”

Section: Introductionmentioning

confidence: 99%

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A novel method of surface modification to polysulfone ultrafiltration membrane by preadsorption of citric acid or sodium bisulfite

Wei¹,

Wang²,

Wang³

et al. 2012

Membrane Water Treatment

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In membrane processes, various agents are used to enhance, protect, and recover membrane performance. Applying these agents in membrane modification could potentially be considered as a simple method to improve membrane performance without additional process. Citric acid (CI) and sodium bisulfite (SB) are two chemicals that are widely used in membrane feed water pretreatment and cleaning processes. In this work, preadsorptions of CI and SB were developed as simple methods for polysulfone ultrafiltration membrane modification. It was found that hydrogen bonding and Van Der Waals attraction could be responsible for the adsorptions of CI and SB onto membranes, respectively. After modification with CI or SB, the membrane surfaces became more hydrophilic. Membrane permeability improved when modified by SB while decreased a little when modified by CI. The modified membranes had an increase in PEG and BSA rejections and better antifouling properties with higher flux recovery ratios during filtration of a complex pharmaceutical wastewater. Moreover, membrane chlorine tolerance was elevated after modification with either agent, as shown by the mechanical property measurements.

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Section: Membrane Antifouling Property and Stabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A novel method of surface modification to polysulfone ultrafiltration membrane by preadsorption of citric acid or sodium bisulfite

Wei¹,

Wang²,

Wang³

et al. 2012

Membrane Water Treatment

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show abstract

“…It is worth noting that the 2 min plasma-treated substrate promoted the sharpest and most distinct absorbance band compared to the other samples (10 and 20 min). This suggests the formation of a large number of various structural features containing carbon-oxygen double bonds (C=O), such as those in the carboxylic acid, aldehyde, ketone, and ester groups [ 40 ]. Moreover, it was found that the intensity of the C=O band decreases when increasing the plasma exposure time (10 and 20 min), which is most likely due to the depletion of the present active sites on the treated surface due to the greater exposure time [ 41 ].…”

Section: Resultsmentioning

confidence: 99%

Graphene Oxide-Based Membranes for Water Purification Applications: Effect of Plasma Treatment on the Adhesion and Stability of the Synthesized Membranes

et al. 2020

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The adhesion enhancement of graphene oxide (GO) and reduced graphene oxide (rGO) layer in the underlying polyethersulfone (PES) microfiltration membrane is a crucial step towards developing a high-performance membrane for water purification applications. In the present study, we modified the surface of a PES microfiltration membrane with plasma treatment (PT) carried out at different times (2, 10, and 20 min). We studied the effect of PT on the adhesion, stability, and performance of the synthesized GO/rGO-PES membranes. The membranes’ surface morphology and chemistry were characterized using atomic force microscopy, field emission scanning electron microscopy, and Fourier transform infrared spectroscopy. The membrane performance was evaluated by conducting a diffusion test for potassium chloride (KCl) ions through the synthesized membranes. The results revealed that the 2 min PT enhanced the adhesion and stability of the deposited GO/rGO layer when compared to the other plasma-treated membranes. This was associated with an increase in the KCl ion rejection from ~27% to 57%. Surface morphology analysis at a high magnification was performed for the synthesized membranes before and after the diffusion test. Although the membrane’s rejection was improved, the analysis revealed that the GO layers suffered from micro/nano cracks, which negatively affected the membrane’s overall performance. The use of the rGO layer, however, helped in minimizing the GO cracks and enhanced the KCl ion rejection to approximately 94%. Upon increasing the number of rGO deposition cycles from three to five, the performance of the developed rGO-PES membrane was further improved, as confirmed by the increase in its ion rejection to ~99%.

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“…The wettability of membrane surface is therewith improved and their protein adsorptivity is decreased. Modification by treatment in water vapor [52][53][54] or carbon dioxide plasmas [24,25,[55][56][57][58][59][60] alters the surface morphology of polymer matrices, as well as their chemical structure, namely, oxygen-containing functional groups, in particular, carboxyls, are formed.…”

Section: Treatment Of Polymer Membranes By Plasma Of Inorganic Gasesmentioning

confidence: 99%

Modification of polymer membrane properties by low-temperature plasma

2015

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The results of investigations into the use of low-temperature plasma for modification of polymer membranes are considered. The basic lines of research in this area are highlighted. It is shown that plasma treatment is quite an effective tool for both improving properties of existing polymer membranes and manufacturing new composite membranes with unique characteristics. Examples of successful use of plasmamodified membranes in various branches of industry and medicine are given.

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Characterization of CO2 plasma treated polymeric membranes and quantification of flux enhancement

Cited by 30 publications

References 42 publications

A novel method of surface modification to polysulfone ultrafiltration membrane by preadsorption of citric acid or sodium bisulfite

A novel method of surface modification to polysulfone ultrafiltration membrane by preadsorption of citric acid or sodium bisulfite

Graphene Oxide-Based Membranes for Water Purification Applications: Effect of Plasma Treatment on the Adhesion and Stability of the Synthesized Membranes

Modification of polymer membrane properties by low-temperature plasma

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