Anti-biofouling microfiltration membranes based on 1-vinyl-3-butylimidazolium chloride grafted PVDF with improved bactericidal properties and vitro biocompatibility

Zhang, Xiaowei; Liang, Yuanyuan; Ni, Chunjun; Li, Yongjin

doi:10.1016/j.msec.2020.111411

Cited by 16 publications

(8 citation statements)

References 45 publications

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“…Since methanol can dissolve the IL monomer, PIL homopolymer, and byproducts from the grafting reaction but not PVDF, only PVDF- g -IL can be retained after methanol extraction. Our previous research confirmed the successful grafting of 2.0 wt % IL on PVDF chains; the GE and GD are 8.3 and 75%, respectively. , The high grafting efficiency is attributed to the compatibility of the imidazole IL in PVDF . (Figure S1 shows the variation of the grafting degree and grafting efficiency with IL addition levels of 1.0, 2.0, 3.0, and 4.0 g.) Meanwhile, an additional N 1s peak (401.1 eVZ) from the imidazole ring on the IL could be found in the XPS pattern of the extracted PVDF- g -IL membrane, further demonstrating the presence of IL on the PVDF chain segment rather than doping (as shown in Figure c).…”

Section: Resultssupporting

confidence: 67%

“…Meanwhile, the modified membranes showed good biofouling resistance. 24 Photodegradation can efficiently degrade organic pollutants into carbon dioxide, water, and other nontoxic compounds, which has become an essential technology for water quality enhancement. 25−28 The entrapment or deposition of photocatalysts in conventional water treatment bestows dye degradability, which enormously decreases membrane contamination using ecofriendly and sustainable modes.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The results certificated increased hydrophilicity and wettability of PVDF- g -[VBIm][Cl] porous membranes. Meanwhile, the modified membranes showed good biofouling resistance …”

Section: Introductionmentioning

confidence: 99%

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Self-Cleaning and Photodegradable PVDF-g-IL Dye Wastewater Separation Membranes Modified with Dopamine-Coated TiO₂ Core–Shell Particles

et al. 2023

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In the present work, self-cleaning membranes of ionic liquid-grafted poly(vinylidene fluoride) (PVDF) polydopamine-coated TiO 2 were prepared through a nonsolvent-induced phase separation method. PDA facilitates the uniform dispersion of TiO 2 nanoparticles in PVDF substrates; meanwhile, TiO 2 @PDA core−shell particles and the hydrophilic IL improve the hydrophilicity of PVDF membranes and contribute to the increased average pore size and porosity, significantly improving the pure water permeation flux and dye wastewater flux (the water flux increased to 385.9 Lm −2 h −1 ). In addition, the combined effect of the positively charged IL and the strongly viscous PDA shell layer enhanced the retention and adsorption of dyes so that the retention and adsorption rates of both anionic and cationic dyes were close to 100%. Notably, the hydrophilic PDA allowed more TiO 2 to migrate to the membrane surface during the phase transition; on the other hand, dopamine could promote photodegradation. Therefore, the combined two factors for TiO 2 @PDA were beneficial to the ultraviolet-catalytic (UV-catalytic) degradation of dyes on the surface of the membrane, leading to >80% degradation rates of various dyes. Thus, the high-efficiency and easy-to-operate wastewater treatment technology provides attractive potential for dye removal and resolution of membrane contamination.

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Section: Resultssupporting

confidence: 67%

Section: ■ Introductionmentioning

confidence: 99%

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Self-Cleaning and Photodegradable PVDF-g-IL Dye Wastewater Separation Membranes Modified with Dopamine-Coated TiO₂ Core–Shell Particles

et al. 2023

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“…The high grafting efficiency should ascribe to the excellent compatibility between PVDF and IL which guarantees adequate contact between PVDF and the imidazole-based ionic liquid. 37 It also can be found that the grafting efficiency decreases slightly for the sample of PVDF-g-IL2 due to the limited number of reactive sites on the irradiated PVDF chains. XPS reveals the elemental composition of the membrane surface, which in turn demonstrates that the grafted IL successfully immobilizes on the PVDF membrane.…”

Section: Grafting Degree and Xps Analysismentioning

confidence: 94%

Ionic‐liquid grafted poly(vinylidene fluoride) with pH responsiveness using as water treatment separation membranes for multi‐dye retention and adsorption

Liu

Xie

Zhao

et al. 2022

J of Applied Polymer Sci

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The rapid development of the world economy and industry brings us a higher standard of living and also causes severe water pollution at the same time. Herein, pH-responsive 1-allyl-3-methylimidazole acetate grafted poly(vinylidene fluoride) membranes (PVDF-g-IL) were prepared by high-energy electron irradiation grafting and non-solvent-induced microphase separation technology. The corresponding pH-responsive membranes can be used to separate dye wastewater with different charges by converting the positive and negative nature of the membrane surface charge. Moreover, the grafted 1-allyl-3-methylimidazole acetate offers a reversible wettability switching ability in different acidic and alkaline environments. The results showed that membrane porosity and average pore size become more prominent, and the pure water flux increases from 121 to 622 Lm À2 h À1 . The functionalized membranes exhibited excellent filtration performance of cationic and anionic dyes wastewater by transforming the positive and negative surface charge. The optimum PVDF-g-IL membrane displayed a nearly 100% rejection and flux recovery rate. Furthermore, PVDF-g-IL membranes exhibited both adsorption and desorption properties for dyes with high adsorption and desorption rates at different pH values. The present research provides a practical and straightforward preparation method of pH-responsive PVDF-g-IL membranes and can apply in the field of dye wastewater purification.

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“…Among them, PVDF is a promising polymer matrix due to its high flexibility, ferroelectric properties, and high thermal stability [ 30 ]. Note that PVDF has a broad potential in wound dressings due to its applicability [ 31 ], anti-adhesion [ 32 ], coagulation [ 33 ], and non-neutralization with ROS [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

Rapid Ferroelectric-Photoexcited Bacteria-Killing of Bi4Ti3O12/Ti3C2Tx Nanofiber Membranes

Wang

Qiao

et al. 2022

Adv. Fiber Mater.

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In this study, an antibacterial nanofiber membrane [polyvinylidene fluoride/Bi 4 Ti 3 O 12 /Ti 3 C 2 T x (PVDF/BTO/Ti 3 C 2 T x )] is fabricated using an electrostatic spinning process, in which the self-assembled BTO/Ti 3 C 2 T x heterojunction is incorporated into the PVDF matrix. Benefiting from the internal electric field induced by the spontaneously ferroelectric polarization of BTO, the photoexcited electrons and holes are driven to move in the opposite direction inside BTO, and the electrons are transferred to Ti 3 C 2 T x across the Schottky interface. Thus, directed charge separation and transfer are realized through the cooperation of the two components. The recombination of electron–hole pairs is maximumly inhibited, which notably improves the yield of reactive oxygen species by enhancing photocatalytic activity. Furthermore, the nanofiber membrane with an optimal doping ratio exhibits outstanding visible light absorption and photothermal conversion performance. Ultimately, photothermal effect and ferroelectric polarization enhanced photocatalysis endow the nanofiber membrane with the ability to kill 99.61% ± 0.28% Staphylococcus aureus and 99.71% ± 0.16% Escherichia coli under 20 min of light irradiation. This study brings new insights into the design of intelligent antibacterial textiles through a ferroelectric polarization strategy. Graphical Abstract Supplementary Information The online version contains supplementary material available at 10.1007/s42765-022-00234-8.

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Anti-biofouling microfiltration membranes based on 1-vinyl-3-butylimidazolium chloride grafted PVDF with improved bactericidal properties and vitro biocompatibility

Cited by 16 publications

References 45 publications

Self-Cleaning and Photodegradable PVDF-g-IL Dye Wastewater Separation Membranes Modified with Dopamine-Coated TiO₂ Core–Shell Particles

Self-Cleaning and Photodegradable PVDF-g-IL Dye Wastewater Separation Membranes Modified with Dopamine-Coated TiO₂ Core–Shell Particles

Ionic‐liquid grafted poly(vinylidene fluoride) with pH responsiveness using as water treatment separation membranes for multi‐dye retention and adsorption

Rapid Ferroelectric-Photoexcited Bacteria-Killing of Bi4Ti3O12/Ti3C2Tx Nanofiber Membranes

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Anti-biofouling microfiltration membranes based on 1-vinyl-3-butylimidazolium chloride grafted PVDF with improved bactericidal properties and vitro biocompatibility

Cited by 16 publications

References 45 publications

Self-Cleaning and Photodegradable PVDF-g-IL Dye Wastewater Separation Membranes Modified with Dopamine-Coated TiO2 Core–Shell Particles

Self-Cleaning and Photodegradable PVDF-g-IL Dye Wastewater Separation Membranes Modified with Dopamine-Coated TiO2 Core–Shell Particles

Ionic‐liquid grafted poly(vinylidene fluoride) with pH responsiveness using as water treatment separation membranes for multi‐dye retention and adsorption

Rapid Ferroelectric-Photoexcited Bacteria-Killing of Bi4Ti3O12/Ti3C2Tx Nanofiber Membranes

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Product

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Self-Cleaning and Photodegradable PVDF-g-IL Dye Wastewater Separation Membranes Modified with Dopamine-Coated TiO₂ Core–Shell Particles

Self-Cleaning and Photodegradable PVDF-g-IL Dye Wastewater Separation Membranes Modified with Dopamine-Coated TiO₂ Core–Shell Particles