Effect of surface properties on antifouling performance of poly(vinyl chloride-co-poly(ethylene glycol)methyl ether methacrylate)/PVC blend membrane

Zhou, Zhenwei; Rajabzadeh, Saeid; Shaikh, Abdul Rajjak; Kakihana, Yuriko; Ma, Wenzhong; Matsuyama, Hideto

doi:10.1016/j.memsci.2016.05.008

Cited by 67 publications

(34 citation statements)

References 57 publications

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“…A sample was placed in a glass cell filled with deionized water, an air bubble (1 µL) was then released below the sample, and the contact angle between the air bubble, and the surface was measured automatically upon contact [24].…”

Section: Air Bubble Contact Angle Measurementmentioning

confidence: 99%

The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes

Jeon

Rajabzadeh

Okamura

et al. 2016

Water

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Abstract:We aimed to investigate the relationship between membrane material and the development of membrane fouling in a membrane bioreactor (MBR) using membranes with different pore sizes and hydrophilicities. Batch filtration tests were performed using submerged single hollow fiber membrane ultrafiltration (UF) modules with different polymeric membrane materials including cellulose acetate (CA), polyethersulfone (PES), and polyvinylidene fluoride (PVDF) with activated sludge taken from a municipal wastewater treatment plant. The three UF hollow fiber membranes were prepared by a non-solvent-induced phase separation method and had similar water permeabilities and pore sizes. The results revealed that transmembrane pressure (TMP) increased more sharply for the hydrophobic PVDF membrane than for the hydrophilic CA membrane in batch filtration tests, even when membranes with similar permeabilities and pore sizes were used. PVDF hollow fiber membranes with smaller pores had greater fouling propensity than those with larger pores. In contrast, CA hollow fiber membranes showed good mitigation of membrane fouling regardless of pore size. The results obtained in this study suggest that the surface hydrophilicity and pore size of UF membranes clearly affect the fouling properties in MBR operation when using activated sludge.

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Section: Air Bubble Contact Angle Measurementmentioning

confidence: 99%

The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes

Jeon

Rajabzadeh

Okamura

et al. 2016

Water

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“…However, the membrane mechanical strength is often weakened by incorporating hydrophilic polymers into membrane matrixes, because the hydrophilic polymers are usually soft materials . The membrane breakage problem of hollow fiber membranes with low mechanical strength becomes more severe, because the membranes are more likely to break under the high‐pressure cleaning or aeration process when applied in wastewater treatment .…”

Section: Introductionmentioning

confidence: 99%

Improving bonding strength between a hydrophilic coating layer and poly(ethylene terephthalate) braid for preparing mechanically stable braid‐reinforced hollow fiber membranes

Zhou

Fang

Wang

et al. 2017

J of Applied Polymer Sci

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A braid-reinforced hollow fiber membrane with mechanically stable coating layer was prepared by coating a blended polymer dope solution on an alkaline-treated poly(ethylene terephthalate) (PET) braid. The alkaline treatment was carried out to endow the PET braid surface with more polar groups and better hydrophilicity. The results showed that the bonding strength between the hydrophilic coating layer and modified PET braid was about two times as great as that between the coating layer and original PET braid, while the pure water permeability (PWP) of the membrane remained unchanged when the PET braid was simply treated in 3 wt % potassium hydroxide (KOH) solution at 90 8C for 1 h or 1 wt % KOH solution for 6 h. The proposed modification approach proved to be a facile, low-cost, and effective method to improve bonding strength between the coating layer and the braid, while other properties, such as PWP and morphology of the coating layer, of the braid-reinforced hollow fiber membranes were not altered, indicating promising potential in membrane engineering.

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“…Physical modification is mainly based on polymer blending and surface coating (or dipping). 11,12 Polymer blending, performed by blending hydrophilic additives or amphiphilic copolymers into the casting solution, is a convenient and versatile approach to improve the membrane surface and internal pore walls by giving them desirable antifouling properties. 3 However, this method is limited by the poor compatibility of hydrophilic polymers with the hydrophobic matrix.…”

Section: Introductionmentioning

confidence: 99%

Improving the hydrophilic and antifouling properties of poly(vinyl chloride) membranes by atom transfer radical polymerization grafting of poly(ionic liquid) brushes

Cheng

et al. 2017

Polymers for Advanced Techs

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In this study, poly(1-butyl-3-vinylimidazolium bromide) (PBVIm-Br) was grafted onto the poly(vinyl chloride) (PVC) membrane surface via a 2-step atom transfer radical polymerization (ATRP) reaction. Poly(2-hydroxyethylmethacrylate) (PHEMA) was grafted onto the membrane surface by aqueous ATRP reaction; then, BVIm-Br was introduced onto the surface of the PHEMA-modified PVC membrane through traditional ATRP reaction. The analysis of surface chemistry confirmed the successful grafting of PHEMA and PBVIm-Br on PVC membrane surface, and the grafting density (GD) of PBVIm-Br gradually increased as the grafting time was prolonged. The modified membrane exhibited a positive charge and significantly enhanced surface hydrophilicity. The static water contact angle of the membrane surface decreased from 92.3°to 51.6°as the GD of the PBVIm-Br brushes increased. Filtration experiments indicated that the water flux of the modified membrane increased with increasing GD, and their recovered fluxes were more than twice than the original. In addition, the total fouling ratio of the membranes decreased from 89% in M0 to 67% in M5, and most of the fouling was reversible as the GD of PBVIm-Br brushes increased.These results indicated that the positive charged poly(ionic liquid) brushes featuring hydrophilic properties would have potential applications in membrane separation. KEYWORDS | Preparation of PVC membranesPoly(vinyl chloride) membranes were prepared using classical immersion precipitation method. | ATRP grafting of poly(ionic liquid) brushes onto PVC membranesThe grafting process includes 2 steps, which are shown in Figure 1. | Membrane characterizationThe chemical compositions of the membranes were characterized by The morphologies of the membranes were observed via scanning electron microscopy (SEM; Phenom G2 pro, Holland). Samples were fractured in liquid nitrogen to obtain orderly cross sections and then sputter coated with gold before SEM observation.The zeta potentials of the membranes were measured through a streaming potential method using an electro kinetic analyzer (SurPASS Anton Paar, GmbH, Austria). The pH of the solution was adjusted by adding NaOH or HCl solution, and the measurement was performed at 25°C.The water CAs of the membranes were measured with a data physics instrument (OCA20, Dataphysics, Germany) under a sessile drop model at room temperature, and the instrument was equipped with a camera to capture images. | Grafting densityThe final grafted PVC membranes were thoroughly washed in DI water and then dried in a vacuum oven at 55°C to constant weight; the grafting density (GD) (μg/cm 2 ) of the grafted membrane was calculated as follows 28:where W is the weight of the PVC grafted membrane (g), W 0 is the weight of the previous membranes before grafting (g), and A is the area of the membrane (m 2 ). | Filtration propertiesThe filtration properties of the membranes were examined using a vacuum filter apparatus. A piece of each test membrane (separation area of 3.46 cm 2 ) was fixed between the top ...

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Effect of surface properties on antifouling performance of poly(vinyl chloride-co-poly(ethylene glycol)methyl ether methacrylate)/PVC blend membrane

Cited by 67 publications

References 57 publications

The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes

The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes

Improving bonding strength between a hydrophilic coating layer and poly(ethylene terephthalate) braid for preparing mechanically stable braid‐reinforced hollow fiber membranes

Improving the hydrophilic and antifouling properties of poly(vinyl chloride) membranes by atom transfer radical polymerization grafting of poly(ionic liquid) brushes

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