Enhancement of antifouling and antibacterial properties of PVC hollow fiber ultrafiltration membranes using pristine and modified silver nanoparticles

Behboudi, Ali; Jafarzadeh, Y.; Yegani, Reza

doi:10.1016/j.jece.2018.02.031

Cited by 71 publications

(29 citation statements)

References 42 publications

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“…1, and the pristine block copolymer UF membrane has a surface porosity of 7.5 ± 1.2%, very close to the value of 6.8 ± 1.4% for the PSF control membrane. The annealing process dramatically increased the surface porosity of the annealed block copolymer membrane to 14.4 ± 3.3%, as well as its membrane porosity to 80.4 ± 2.7%; these values are substantially higher than those of the reported polymeric UF membranes fabricated through the phase inversion method [29][30][31] . As a control, there was no apparent change in the PSF UF membrane upon annealing treatment.…”

Section: Resultsmentioning

confidence: 71%

Breaking the permeability–selectivity trade-off in thin-film composite polyamide membranes with a PEG-b-PSF-b-PEG block copolymer ultrafiltration membrane support through post-annealing treatment

Wang

et al. 2019

NPG Asia Mater

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In this work, amphiphilic polyethylene glycol-block-polysulfone-block-polyethylene glycol (PEG-b-PSF-b-PEG) was used as a membrane support to fabricate a high-performance thin-film composite (TFC) forward osmosis (FO) membrane. A facile post-annealing approach was developed to simultaneously improve the water permeability and antifouling property of the TFC membrane having the PEG-b-PSF-b-PEG support without sacrificing its selectivity. The experimental results illustrate that a highly crosslinked polyamide with low reverse salt flux could be formed on the PEG-b-PSF-b-PEG support, and the post-annealing treatment could tailor the membrane structure and properties of the PEG-b-PSF-b-PEG support to decrease its structure parameter without affecting the polyamide. The annealed TFC membrane exhibited excellent permeability-selectivity, with a high A/B ratio of 19.6 bar −1 (water permeability coefficient A of 1.76 LMH•bar −1 and NaCl permeability coefficient B of 0.09 LMH). The static and dynamic antifouling performances of the annealed TFC membrane were also demonstrated, finding that little bovine serum albumin (BSA) was adsorbed on the PEG-b-PSF-b-PEG support surface, and a reduced water flux decline and a high water recovery were achieved compared with those of the control sample. Our work demonstrates that the amphiphilic PEG-b-PSF-b-PEG membrane can work as an ideal TFC support to break the permeability-selectivity trade-off of the TFC FO membrane and to improve its antifouling properties through post-annealing treatment.

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Section: Resultsmentioning

confidence: 71%

Breaking the permeability–selectivity trade-off in thin-film composite polyamide membranes with a PEG-b-PSF-b-PEG block copolymer ultrafiltration membrane support through post-annealing treatment

Wang

et al. 2019

NPG Asia Mater

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“…Afterward, PWF of membrane was measured again ( J 2 ). The values of J 0 , J 1 , and J 2 were used to evaluate fouling parameters including total fouling ratio (TFR), reversible fouling ratio (RFR), irreversible fouling ratio (IFR), and flux recovery ratio (FRR):

TFR = \frac{J_{0} - J_{1}}{J_{0}}

RFR = \frac{J_{2} - J_{1}}{J_{0}}

IFR = \frac{J_{0} - J_{2}}{J_{0}}

FR = \frac{J_{2}}{J_{0}}

…”

Section: Methodsmentioning

confidence: 99%

“…A submerged aerobic membrane bioreactor (MBR) setup in laboratory scale was used in this study following a procedure detailed in our previous works . The operational conditions of the MBR are presented in Table .…”

Section: Methodsmentioning

confidence: 99%

“…The results revealed that the addition of certain amount of TiO 2 nanoparticles improved fouling behavior of all composite membranes. Behboudi et al prepared PVC/Ag hollow‐fiber membranes, and it was obtained that the presence of Ag nanoparticles in PVC matrix, improved pure water flux, hydrophilicity, and mechanical strength of the membranes. It was also shown that membranes containing modified Ag nanoparticles had better performance than both neat and Ag embedded PVC hollow‐fiber membranes …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High‐density polyethylene membranes embedded with carboxylated and polyethylene glycol‐grafted nanodiamond to be used in membrane bioreactors

Kivi

Alinia

Jafarzadeh

et al. 2019

J of Applied Polymer Sci

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In this work, neat and modified nanodiamond (ND) particles were embedded into high-density polyethylene (HDPE) membranes to improve hydrophilicity and antifouling properties. The membranes were prepared via thermally induced phase separation (TIPS) method and used for pharmaceutical wastewater treatment in membrane bioreactors (MBR) system. To prevent the agglomeration of ND, it was modified using two methods: thermal carboxylation (ND-COOH) and grafting with polyethylene glycol (ND-PEG). Membranes with different concentration of ND-COOH and ND-PEG nanoparticles ranging from 0.00 to 1.00 wt % were prepared and characterized using a set of analyses including water contact angle, pure water flux, tensile strength, differential scanning calorimeter, field emission scanning electron microscopy, and energy dispersive X-ray spectroscopy. It was found that the optimum contents of ND-COOH and ND-PEG nanoparticles were 0.50 wt % and 0.75 wt %, respectively. The interfacial interaction between nanoparticles and HDPE matrix was studied based on Pukanzsky model. To examine the performance of membranes, critical flux, filtration experiment in the MBR, and fouling analysis of membranes were carried out. The results showed that among the fabricated membranes, 0.75 wt % HDPE/ND-PEG membrane had the highest water flux and the best antifouling properties.

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“…After that, the membrane was immersed in DI water for 48 h. Then, the sample was weighed immediately and recorded as the wet weight (m 1 ). The membrane porosity (ε) was calculated using Equation (1) as follows [ 21 ]:

where m 1 is the wet membrane weight (g), m 2 is the dry membrane weight (g), ρ water is the water density (0.998 g cm −3 ), and ρ p is the PVDF density (1.74 g cm −3 ). The data of the membrane porosity were presented as a mean with standard deviations calculated from three data of three separated membranes.…”

Section: Methodsmentioning

confidence: 99%

Enhancing the Antibacterial Properties of PVDF Membrane by Hydrophilic Surface Modification Using Titanium Dioxide and Silver Nanoparticles

et al. 2020

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This work investigates polyvinylidene fluoride (PVDF) membrane modification to enhance its hydrophilicity and antibacterial properties. PVDF membranes were coated with nanoparticles of titanium dioxide (TiO2-NP) and silver (AgNP) at different concentrations and coating times and characterized for their porosity, morphology, chemical functional groups and composition changes. The results showed the successfully modified PVDF membranes containing TiO2-NP and AgNP on their surfaces. When the coating time was increased from 8 to 24 h, the compositions of Ti and Ag of the modified membranes were increased from 1.39 ± 0.13 to 4.29 ± 0.16 and from 1.03 ± 0.07 to 3.62 ± 0.08, respectively. The water contact angle of the membranes was decreased with increasing the coating time and TiO2-NP/AgNP ratio. The surface roughness and permeate fluxes of coated membranes were increased due to increased hydrophilicity. Antimicrobial and antifouling properties were investigated by the reduction of Escherichia coli cells and the inhibition of biofilm formation on the membrane surface, respectively. Compared with that of the original PVDF membrane, the modified membranes exhibited antibacterial efficiency up to 94% against E. coli cells and inhibition up to 65% of the biofilm mass reduction. The findings showed hydrophilic improvement and an antimicrobial property for possible wastewater treatment without facing the eminent problem of biofouling.

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Enhancement of antifouling and antibacterial properties of PVC hollow fiber ultrafiltration membranes using pristine and modified silver nanoparticles

Cited by 71 publications

References 42 publications

Breaking the permeability–selectivity trade-off in thin-film composite polyamide membranes with a PEG-b-PSF-b-PEG block copolymer ultrafiltration membrane support through post-annealing treatment

Breaking the permeability–selectivity trade-off in thin-film composite polyamide membranes with a PEG-b-PSF-b-PEG block copolymer ultrafiltration membrane support through post-annealing treatment

High‐density polyethylene membranes embedded with carboxylated and polyethylene glycol‐grafted nanodiamond to be used in membrane bioreactors

Enhancing the Antibacterial Properties of PVDF Membrane by Hydrophilic Surface Modification Using Titanium Dioxide and Silver Nanoparticles

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