Hydrophilicity, morphology and excellent adsorption ability of poly(vinylidene fluoride) membranes induced by graphene oxide and polyvinylpyrrolidone

Liu, Xiaohao; Duan, Jin; Yang, Jing‐hui; Huang, Ting; Zhang, Nan; Wang, Yong; Zhou, Zuowan

doi:10.1016/j.colsurfa.2015.09.036

Cited by 34 publications

(12 citation statements)

References 51 publications

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“…). Membrane surface morphology could affect its pure water flux and wastewater flux . To comprehensively observe the morphological changes of the two membranes, SEM and AFM analysis provided visual and quantitative characterization of the surface morphology of both membranes (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The membranes used in this experiment were the self‐prepared polyvinylidene fluoride (PVDF) membrane. For comparison, the blank PVDF membrane was prepared via the phase inversion induced by immersion precipitation technique . 3 g polyvinl pyrrolidone (K.30) and 15 g PVDF were dissolved into the 100 mL N,N‐Dimethylacetamide (DMAC) with vigorously stirring at room temperature in order to prepare casting solution.…”

Section: Methodsmentioning

confidence: 99%

“…For comparison, the blank PVDF membrane was prepared via the phase inversion induced by immersion precipitation technique. 19 3 g polyvinl pyrrolidone (K.30) and 15 g PVDF were dissolved into the 100 mL N,N-Dimethylacetamide (DMAC) with vigorously stirring at room temperature in order to prepare casting solution. The solution was placed overnight at room temperature to remove bubbles, and then it was spread on a non-woven substrate by casting life to obtain a coating layer with a thickness of 300 m.…”

Section: Conductive Membrane Preparationmentioning

confidence: 99%

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Polypyrrole vapor phase polymerization on PVDF membrane surface for conductive membrane preparation and fouling mitigation

Liu

Tian

Xiong

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND Conductive membranes, such as carbon material modified membrane and nickel metal film could be used for membrane fouling mitigation and energy generation during filtration. However, it is necessary to simplify the preparation process and reduce the cost for practical application. Here, a conducting polymer polypyrrole was polymerized on PVDF membrane surface for conductive membrane preparation via vapor phase polymerization. RESULTS After modification, the pure water flux was reduced from 3393.26 ± 222.99 L m‐2 h‐1 to 569.48 ± 150.82 L m‐2 h‐1. The contact angle was 58.63° for blank membrane after 8 s of delay, which was reduced to 27.53° for modified membrane. During short‐term filtration, the modified membrane maintained high, stable flux and low effluent turbidity. The fouling of conductive membrane can be mitigated by 1 V cm‐1 of electric filed during long‐term filtration. Better effluent properties were obtained from modified membrane, which were improved further when an electric field was applied. CONCLUSION It is concluded that the conductive membrane has a smoother and more hydrophilic surface, resulting in better anti‐fouling and effluent properties with the assistance of an electric field. © 2017 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Conductive Membrane Preparationmentioning

confidence: 99%

See 1 more Smart Citation

Polypyrrole vapor phase polymerization on PVDF membrane surface for conductive membrane preparation and fouling mitigation

Liu

Tian

Xiong

et al. 2017

J of Chemical Tech & Biotech

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“…A highly energy‐efficient and broadly applicable approach for effective separation of oil–water mixtures, especially surfactant‐stabilized emulsions, remains highly desired . To date, modified membrane technology has been witnessing a booming era through continuous development both in academic and industrial fields, which has been generally acknowledged as an effective method for the separation of oil–water emulsions owing to their remarkable advantages such as high oil‐removal efficiency, low energy consumption, and relatively simple process …”

Section: Introductionmentioning

confidence: 99%

“…However, as typical inorganic additives, HNTs are prone to aggregate in membrane matrix or leach out to the coagulation bath during the phase inversion process. Therefore, it is difficult for HNTs to disperse uniformly in membrane matrix, which needs to be overcome urgently . One of the effective methods is to graft chemicals which have good compatibility with organic materials onto the hydrophilic additives, thus enhancing the dispersibility of the hydrophilic additives and developing specific interactions between additives and polymer matrix .…”

Section: Introductionmentioning

confidence: 99%

Improvement in antifouling and separation performance of PVDF hybrid membrane by incorporation of room‐temperature ionic liquids grafted halloysite nanotubes for oil–water separation

Zhang

Shu

Yang

et al. 2018

J of Applied Polymer Sci

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Novel hybrid poly(vinylidene fluoride) ultrafiltration membranes were fabricated via immersion precipitation method through the incorporation of the halloysite nanotubes functionalized with 1-methyl-3-(3-triethoxysilypropyl) imidazolium chloride. The modified halloysite nanotubes were confirmed by Fourier transform infrared spectrometer, thermogravimetric analysis, and transmission electron microscopy. The morphologies of hybrid membranes were characterized by atomic force microscopy and energy dispersive spectrometer, while the filtration and antifouling performance were investigated by means of porosity, mean pore radius, pure water permeability, rejection ratio, and flux recovery ratio. The addition of the modified halloysite nanotubes obviously improved the membrane hydrophilicity. Besides, the flux recovery ratios were as high as 96% for humic acid and 94% for bovine serum albumin after two filtration cycles. Finally, the modified membranes were used to separate diesel oil-water emulsions. The rejection ratio and flux recovery ratio were as high as 99% and 94%, respectively. The poly(vinylidene fluoride) membranes incorporated by the novel halloysite nanotubes provided a promising alternative for oil-water emulsions separation.

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High‐flux PVDF/PVP nanocomposite ultrafiltration membrane incorporated with graphene oxide nanoribbones with improved antifouling properties

Tofighy

Mohammadi

Sadeghi

2020

J of Applied Polymer Sci

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A novel polyvinylidene fluoride (PVDF) nanocomposite membrane containing graphene oxide nanoribbones (GONRs) as a new nanofiller and polyvinylpyrrolidone (PVP) as pore former agent was prepared via phase inversion method. GONRs were prepared by oxidative unzipping of multi-walled carbon nanotubes (MWCNTs) via chemical approach. Chemical vapor deposition method was used to synthesis MWCNTs. The effects of adding GONRs and PVP into the casting solution on morphology, hydrophilicity and pure water flux (PWF) of the prepared nanocomposite membranes were explored. Antifouling experiments were also performed. It was found that compared to the neat PVDF membrane, PWF of the PVDF/PVP, PVDF/(0.5GONRs) and PVDF/(0.5GONRs)/PVP membranes were improved 80%, 44.9%, and 241.6%, respectively. The obtained results showed that GONRs and PVP exhibit synergistic effects in controlling the membrane properties. This work shows that GONRs can be suitable as nanofiller for preparation of high performance PVDF ultrafiltration membranes with improved antifouling properties.

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Hydrophilicity, morphology and excellent adsorption ability of poly(vinylidene fluoride) membranes induced by graphene oxide and polyvinylpyrrolidone

Cited by 34 publications

References 51 publications

Polypyrrole vapor phase polymerization on PVDF membrane surface for conductive membrane preparation and fouling mitigation

Polypyrrole vapor phase polymerization on PVDF membrane surface for conductive membrane preparation and fouling mitigation

Improvement in antifouling and separation performance of PVDF hybrid membrane by incorporation of room‐temperature ionic liquids grafted halloysite nanotubes for oil–water separation

High‐flux PVDF/PVP nanocomposite ultrafiltration membrane incorporated with graphene oxide nanoribbones with improved antifouling properties

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