Preparation and characterization of antifouling graphene oxide/polyethersulfone ultrafiltration membrane: Application in MBR for dairy wastewater treatment

Zinadini, Sirus; Vatanpour, Vahid; Zinatizadeh, Ali Akbar; Rahimi, Masoud; Rahimi, Zahra; Kian, Mohsen

doi:10.1016/j.jwpe.2015.07.005

Cited by 112 publications

(57 citation statements)

References 57 publications

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“…Both GO and graphene exhibit several characteristic absorption bands of oxygen containing groups, whereas, there were no significant peaks noticed in case of graphite. The influence of surface functionalities in GO was confirmed from the observed IR spectra at 3300 cm −1 (O―H stretching vibrations), at 1726 cm −1 (C═O stretching vibrations), at 1618 cm −1 (C═C skeletal vibrations of the unoxidized species), at 1060 cm −1 (C―O stretching vibrations) and at 458 cm −1 (C―H out of plane bending vibrations).…”

Section: Resultsmentioning

confidence: 70%

Synergistic effect of hybrid graphene and boron nitride on the cure kinetics and thermal conductivity of epoxy adhesives

Singh

Panda

Mohanty

et al. 2017

Polymers for Advanced Techs

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In the present study, the synergistic effect of hybrid boron nitride (BN) with graphene on the thermal conductivity of epoxy adhesives has been reported. Graphene was prepared by chemical reduction of graphite oxide (GO) in a mixture of concentrated H2SO4/H3PO4 acid. The particle size distribution of GO was found to be ~10 μm and a low contact angle of 54° with water indicated a hydrophilic surface. The structure of prepared graphene was characterized by Fourier transform infrared (FTIR), X‐ray diffraction (XRD), Raman spectroscopy and atomic force microscopy (AFM). The thermal conductivity of adhesives was measured using guarded hot plate technique. Test results indicated an improvement in the thermal conductivity up to 1.65 W/mK, which was about ninefold increase over pristine epoxy. Mechanical properties of different epoxy formulations were also measured employing lap shear test. The surface characterization of different epoxy adhesive systems was characterized through XRD, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies. Fourier transform infrared also served to determine the nature of interactions between filler particles and epoxy resin. Non‐isothermal differential scanning calorimetric (DSC) technique was used to investigate the effects of graphene and BN particles on the cure kinetics and cross‐linking reaction of epoxy cured with amine curing agent. The Kissinger equation, the model‐free isoconversional Flynn–Wall–Ozawa method and the Ozawa model were used to analyze the kinetic parameter. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 70%

Synergistic effect of hybrid graphene and boron nitride on the cure kinetics and thermal conductivity of epoxy adhesives

Singh

Panda

Mohanty

et al. 2017

Polymers for Advanced Techs

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“…The permeate flux was in the order of 1.0HF > 0.5HF > bare HF>1.0FS > 0.5FS > bare FS. Zinadini et al . has prepared GO embedded membranes and the pores of the membranes were observed to be larger than the unfilled PES membrane.…”

Section: Resultsmentioning

confidence: 99%

“…The permeate flux was in the order of 1.0HF > 0.5HF > bare HF>1.0FS > 0.5FS > bare FS. Zinadini et al 57 has prepared GO embedded membranes and the pores of the membranes were observed to be larger than the unfilled PES membrane. This is consistent with our work where GO-PES composite membranes consist of larger finger-like pore channels that allow more water molecules to pass through, thus, improving the permeate flux.…”

Section: Hydrophilicity Porosity and Pwf Evaluationmentioning

confidence: 99%

Fabrication and characterization of graphene oxide–polyethersulfone (GO–PES) composite flat sheet and hollow fiber membranes for oil–water separation

Junaidi

Othman

Shahruddin

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND In this work, a series of graphene oxide–polyethersulfone (GO–PES) composite flat sheet (FS) and hollow fiber (HF) membranes were fabricated by blending 0.5 and 1.0 wt% of GO into the PES matrix and utilized for oil–water separation. GO was first prepared and characterized by using Fourier‐transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), X‐ray diffraction (XRD) and thermogravimetric analysis (TGA) before being used as membrane fillers. RESULTS Interestingly, although similar dope composition was used for the fabrication of HF and FS membranes, their morphology and pore size varied significantly owing to the way the membranes were fabricated. Significant enhancement of hydrophilicity was observed for both composite FS and HF membranes, where the water contact angle value decreased from 74.8° to 42.2° and 71.4° to 49.8°, respectively. The flux of the composite membranes increased up to 150% of the bare membranes especially when 1.0 wt% of GO was added. Although higher oil rejection (~99%) was observed for HF membranes that possess smaller pores, the permeation flux was maintained due to the improved flow dynamic. Lower oil rejection (up to 50%) was observed for FS membranes, which might be due to its big pore sizes particularly at the bottom surface. As more oil droplets formed on the membrane surface and prevented water molecules to pass through the membrane, fouling might occur rapidly. CONCLUSIONS The results obtained in this work suggest that surface hydrophilicity, pore size of membranes and oil–water separation performances was greatly affected by membrane shape. Owing to many advantages of HF membranes, this type of membrane has great potential for commercial applications. © 2020 Society of Chemical Industry

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“…The BSA rejection percentage for membranes modified with SCMNPs-COOOH nanoparticles is a little more than that for membranes modified with SCMNPs-COOH and SCMNPs nanoparticles due to the presence of more oxygen atoms in the structure of the nanoparticles, good dispersion and therefore, greater hydrophilicity, so that it hinders protein contact on the membrane furface. 44,53 The main reason for clogging of the membranes is absorbance of fouling material at the membrane surface or its penetration into the pores of the membrane. 3 Membrane fouling includes reversible and irreversible fouling, the difference between reversible and irreversible fouling being that reversible fouling results in unstable deposition of foulants on the surface that can be removed by water washing.…”

Section: Membrane Characterization Hydrophilicity Of Membranesmentioning

confidence: 99%

A novel antifouling ultrafiltration membranes prepared from percarboxylic acid functionalized SiO₂ bound Fe₃O₄ nanoparticle (SCMNP‐COOOH)/polyethersulfone nanocomposite for BSA separation and dye removal

Vatanpour

Shahsavarifar

Khorshidi

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Silica coated magnetite nanoparticles (SCMNPs) were synthesized via a co‐precipitating method and functionalized with carboxylic acid and percarboxylic acid groups for the preparation of microporous polyethersulfone (PES) nanocomposite membranes and used in bovine serum albumin (BSA) and dye separation. There is no published report about the use of this nanoparticle in the preparation of mixed matrix membranes. RESULTS Different concentrations of these nanoparticles were used. The 0.5 wt% SCMNPs‐COOOH NPs–PES membrane had the lowest irreversible fouling resistance (Rir) value (8.33%) and the highest FRR value (91.7%), suggesting that the prepared mixed matrix membrane is easily recovered by water washing. The introduction of percarboxylic acid groups has a positive impact on rejection of the three dyes (Rhodamine B, Direct Black 38, Reactive Green 19), and all membranes presented rejections of more than 90% due to improved electrostatic repulsion between the dye and the membrane surface by incorporation of the nanoparticles. CONCLUSION The membranes modified by SCMNPs‐COOOH had significantly higher permeability and BSA solution flux compared with the bare PES membrane. The nanocomposite membranes had enhanced hydrophilicity because of water affinity enhancement of the membrane surface due to the presence of hydrophilic nanoparticles. It is concluded that SCMNPs‐COOOH nanoparticles could be an ideal additive to modify PES membrane for water filtration applications. © 2018 Society of Chemical Industry

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Preparation and characterization of antifouling graphene oxide/polyethersulfone ultrafiltration membrane: Application in MBR for dairy wastewater treatment

Cited by 112 publications

References 57 publications

Synergistic effect of hybrid graphene and boron nitride on the cure kinetics and thermal conductivity of epoxy adhesives

Synergistic effect of hybrid graphene and boron nitride on the cure kinetics and thermal conductivity of epoxy adhesives

Fabrication and characterization of graphene oxide–polyethersulfone (GO–PES) composite flat sheet and hollow fiber membranes for oil–water separation

A novel antifouling ultrafiltration membranes prepared from percarboxylic acid functionalized SiO₂ bound Fe₃O₄ nanoparticle (SCMNP‐COOOH)/polyethersulfone nanocomposite for BSA separation and dye removal

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Preparation and characterization of antifouling graphene oxide/polyethersulfone ultrafiltration membrane: Application in MBR for dairy wastewater treatment

Cited by 112 publications

References 57 publications

Synergistic effect of hybrid graphene and boron nitride on the cure kinetics and thermal conductivity of epoxy adhesives

Synergistic effect of hybrid graphene and boron nitride on the cure kinetics and thermal conductivity of epoxy adhesives

Fabrication and characterization of graphene oxide–polyethersulfone (GO–PES) composite flat sheet and hollow fiber membranes for oil–water separation

A novel antifouling ultrafiltration membranes prepared from percarboxylic acid functionalized SiO2 bound Fe3O4 nanoparticle (SCMNP‐COOOH)/polyethersulfone nanocomposite for BSA separation and dye removal

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A novel antifouling ultrafiltration membranes prepared from percarboxylic acid functionalized SiO₂ bound Fe₃O₄ nanoparticle (SCMNP‐COOOH)/polyethersulfone nanocomposite for BSA separation and dye removal