Fabrication and characterization of high flux poly(vinylidene fluoride) electrospun nanofibrous membrane using amphiphilic polyethylene‐block‐poly(ethylene glycol) copolymer

Gandhimathi, Chinnasamy; Sundarrajan, Subramanian; Matsuura, Takeshi; Srinivasan, Dhanalakshmi; He, Wei‐Dong; Xin, Dong; Ramakrishna, Seeram

doi:10.1002/app.50296

Cited by 15 publications

(3 citation statements)

References 45 publications

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“…The pressure drop also strongly depends on the membrane design and application. Membranes for ultrafiltration or ion adsorption under operation show fluxes, for example, from 45 up to 6000 L/(m 2 h) bar. − Membranes such as the Pyr or Nplus membranes possess comparable fluxes outperformed by the NIPAM and AA membranes.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Performance Assessment of Low-Pressure Affinity Membranes Based on Functionalized, Electrospun Polyacrylates for Gold Nanoparticle Filtration

Müller

Greiner

2021

ACS Appl. Mater. Interfaces

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Electrospun nanofibrous membranes (ENM) possess many advantages over commonly utilized water purification systems. They provide high porosity with interconnected pores and a high surface to volume ratio, facilitating particle adsorption. Affinity separation moves into a promising future for application, for example, nanoparticle adsorption with excellent filtration efficiency, because of its highly specific adsorption mechanism. However, not all effects on filtration performance are entirely understood. In this paper, we investigate significant filtration parameters, such as pore size, mechanical stability, and hydrophilicity, and determine a sequence of importance for an optimal pressure drop. Copolymers with various hydrophilic functional groups such as acid, amide, pyridine, and quaternary amine were utilized. Effects on the pressure drop or nanoparticle filtration efficiency can then easily be attributed to the corresponding functional group. UV-light was used to induce cross-linking in the membranes, which subsequently surpassed the mechanical stability of commonly used hydrophobic membranes. A maximum tensilestress of up to 11.6 MPa was obtained, whereby an optimization of at least 22% was achieved. Moreover, these cross-links reduce fiber swelling by a maximum of 26%. The membrane potential depends on the different functional groups and their incorporation number from 10 to 50 mol %. Successful gold nanoparticle (AuNP) filtration in flow mode was demonstrated and highlighted the outstanding membrane properties and selectivity. The Nplus membrane achieved 100% filtration efficiency over a duration of 6 min, surpassing the Pyr membrane's performance. This was attributed to the ionic interaction of the Nplus membrane, in contrast with the physical adsorption of the Pyr membrane.

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Section: Resultsmentioning

confidence: 99%

Preparation and Performance Assessment of Low-Pressure Affinity Membranes Based on Functionalized, Electrospun Polyacrylates for Gold Nanoparticle Filtration

Müller

Greiner

2021

ACS Appl. Mater. Interfaces

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“…Equation was used to calculate the FRR of nanofibrous membranes normalF normalR normalR ( % ) = J normalW 2 J normalW 1 × 100 where J W1 is the pure water flux (L m –2 h –1 ) before the MNP suspension filtration study and J W2 is the pure water flux (L m –2 h –1 ) after the MNP suspension filtration study.…”

Section: Methodsmentioning

confidence: 99%

Electrospun Polyurethane Nanofiber Membranes for Microplastic and Nanoplastic Separation

Juraij

Ammed

Chinglenthoiba

et al. 2023

ACS Appl. Nano Mater.

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Multifunctional materials for industrial wastewater treatment are in high demand due to the contamination of microand nanoplastics (MNPs) and dyes. Herein, we demonstrate a polyurethane-based (PU) electrospun composite membrane for MNP separation and selective methylene blue (MB) adsorption. The optimized 20 wt % graphene oxide-montmorillonite (GO-Mt)-loaded nanofibrous composite membrane (20-PGT) exhibited its superhydrophilicity with a water contact angle of 0°and high water flux. It displayed a maximum pressure-driven water flow of 8163 L m −2 h −1 and a gravity-driven water flux of 793 L m −2 h −1 . Three model MNPs, such as acrylonitrile butadiene styrene (ABS), polystyrene (PS), and poly(methyl methacrylate) (PMMA) with various sizes, have been demonstrated. The adsorptive separation and size-exclusive interception mechanisms were observed for nanoplastics (NPs) and microplastics (MPs), respectively. Cake formation, intermediate blocking, and standard blocking mechanisms were followed during the filtration of ABS MPs, PMMA NPs, and PS NPs, respectively. Additionally, the composite membrane exhibited selective MB adsorption from the mixture of dyes, with a maximum adsorption capacity of 417 mg g −1 . Langmuir adsorption isotherm and pseudo-second-order kinetics define the adsorption isotherm and adsorption kinetics, respectively. The fabricated, robust fibrous composite membrane opens a wider door for the removal of MNPs and MB from contaminated water.

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“…The designed fabrics showed adsorption toward organic micro‐pollutants. Gandhimathi et al 16 converted hydrophobic poly(vinylidene fluoride) (PVDF) into a hydrophilic electrospun membrane by blending it with a polyethylene glycol copolymer. It showed significant water flux due to the superhydrophilicity and large pore size.…”

Section: Introductionmentioning

confidence: 99%

Efficient selective methylene blue adsorption by polyurethane/montmorillonite‐based antifouling electrospun composite membranes

Juraij

Vasudevan

Sujith

2022

J of Applied Polymer Sci

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Fabrication and characterization of high flux poly(vinylidene fluoride) electrospun nanofibrous membrane using amphiphilic polyethylene‐block‐poly(ethylene glycol) copolymer

Abstract: Electrospun nanofiber membranes (ENM) made of polymers such as polysulfone and poly(vinylidene fluoride) (PVDF) have a much higher contact angle (CA) and also more hydrophobic when compared to the virgin polymers. For water treatment applications, membranes with hydrophilic nature are

Cited by 15 publications

References 45 publications

Preparation and Performance Assessment of Low-Pressure Affinity Membranes Based on Functionalized, Electrospun Polyacrylates for Gold Nanoparticle Filtration

Preparation and Performance Assessment of Low-Pressure Affinity Membranes Based on Functionalized, Electrospun Polyacrylates for Gold Nanoparticle Filtration

Electrospun Polyurethane Nanofiber Membranes for Microplastic and Nanoplastic Separation

Efficient selective methylene blue adsorption by polyurethane/montmorillonite‐based antifouling electrospun composite membranes

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