Fabrication and Characterization of Electrospun Nanofibrous Composite Membrane for Air Filtration

Cheng, Si

doi:10.3993/jfbim00272

Cited by 2 publications

(4 citation statements)

References 13 publications

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“…Homogeneous CA solutions were prepared by dissolving 16 and 15% (w/v) of CA powder in acetone/DMAc (2:1 v/v), and electrospun CA solutions were coded with 16CA and 15CA and with their collection periods. Homogeneous PVDF solutions were prepared by dissolving 14, 12 and 10% (w/w) PVDF powder in acetone/DMAc (1:4 v/v), and tetraethylammonium bromide (TEAB 0.015 g) was added to each PVDF solution (30 g) to improve the electrospinnability and the fiber uniformity [37,52–54]. Electrospun PVDF solutions were coded as 14PVDF, 12PVDF and 10PVDF with their collection periods.…”

Section: Experımental Sectionmentioning

confidence: 99%

“…The proposed nanofiber layers show high mechanical filtration efficiency compared to the conventional facemask layers. PVDF was chosen because of its hydrophobicity, high thermal and chemical resistance, and excellent mechanical properties [35–38]. It is also widely used in ultrafiltration, microfiltration, membrane distillation and some other membrane processes [37–39] such as affinity membranes.…”

Section: Introductionmentioning

confidence: 99%

“…PVDF was chosen because of its hydrophobicity, high thermal and chemical resistance, and excellent mechanical properties [35–38]. It is also widely used in ultrafiltration, microfiltration, membrane distillation and some other membrane processes [37–39] such as affinity membranes. Nanopressure sensors [40,41], polymer electrolytes or separators [42], proton exchange membranes in fuel cells [43] and thin film composite membranes for forward osmosis [44] are some other applications of PVDF nanofibers.…”

Section: Introductionmentioning

confidence: 99%

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Cellulose acetate and polyvinylidene fluoride nanofiber mats for N95 respirators

Akduman

2019

Journal of Industrial Textiles

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Nanofibrous media have a low basis weight, high permeability and small pore size that make them appropriate for a wide range of filtration applications, particularly for smaller particles. In contrast to electrostatic filter media, nanofibers' filtration efficiencies depend on the mechanical filtration mechanism and do not degrade with time. In this study, the National Institute for Occupational Safety and Health (NIOSH) requirements for the N95 particulate filtering half mask were achieved using electrospun cellulose acetate (CA) and polyvinylidene fluoride (PVDF) nanofiber coated polypropylene spunbond layers. Specifically, 16 and 15% (w/v), and 14, 12 and 10% (w/w) polymer concentrations were selected for CA nanofibers and PVDF nanofibers, respectively, to adjust the nanofiber diameters. The diameters of CA and PVDF nanofibers were decreased with decreasing polymer concentration for both CA (319.02 to 264.02 nm) and PVDF (236.50 to 142.59 nm) nanofibers. The thickness of the electrospun 16CA, 15CA and 14PVDF, 12PVDF, 10PVDF mats was adjusted by varying the collection period (15 min, 30 min, 60 min). The effects of electrospun CA and PVDF nanofiber diameter on the pore size and the thickness of the mats were compared in terms of filtration performance. 16CA with a nanofiber diameter of 319.02 nm had the largest first bubble point of 26.5 µm and mean flow pore size of 5.71 µm at 15 min with a thickness of 0.019 mm. The smallest first bubble point and mean flow pore values and the smallest pore size were achieved with the finest nanofibers of 10PVDF. Filtration performances were given as initial penetration and air flow resistance (ΔP). 16CA-60 min and 15CA-30 min mats both met the NIOSH requirements with their bulky structure. For PVDF, thinner nanofibers with smaller pores were produced compared to the CA nanofibers, and the NIOSH requirements were only achieved using double-layered, face-to-face 10PVDF-15 min nanofiber mats with the penetration of 1.85% and ΔP of 33.87 mmH2O.

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Section: Experımental Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cellulose acetate and polyvinylidene fluoride nanofiber mats for N95 respirators

Akduman

2019

Journal of Industrial Textiles

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“…It is highly non-reactive thermoplastic fluoropolymer (Jang et al, 2015). PVDF is also widely used polymer in ultrafiltration, microfiltration, membrane distillation and some other membrane processes (Cheng et al, 2017;Cui, Drioli, & Moo, 2014;F. Liu, Hashim, Liu, Abed, & Li, 2011) such as affinity membranes.…”

Section: Introductionmentioning

confidence: 99%

Mikrofiltrasyon için elektrolif çekim yöntemi ile üretilmiş PVDF nanolifli membranlar: Gözenek boyutu ve kalınlığının membran performansına etkisi

Akduman

2019

European Journal of Science and Technology

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Microfiltration membranes are needed in wastewater treatment, water purification and concentration processes. To separate microorganisms and suspended particles from process liquid, a contaminated fluid, especially water, is passed through a porous membrane. Electrospun nanofiber membranes could be used for this aim with their nanoscale fibers, small pore size, low weight and high permeability. The main purpose of this study is to show the relationship between the average fiber diameter and thickness of the PVDF nanofiber membrane and the pore size and liquid filtration efficiency. PVDF is a widely used polymer in water treatment processes. It is highly non-reactive thermoplastic fluoropolymer with outstanding physical and chemical properties. In this study, PVDF nanofibers were produced from 12, 14 and 16% (w/v) polymer solutions by electrospinning method to achieve three different mean diameters. 15 min, 30 min, 60 min, 3h and 5h of production periods were used for producing various thicknesses. According to pore size measurements, the differences in mean flow pore size (MFP) of 16PVDF and 14PVDF nanofiber membranes were not distinct. However, due to thin nanofiber diameter (278.58 nm) and high amount of nanofibers, biggest pore size (FBP) of 12PVDF-5h was the smallest. There was also significant difference between 12PVDF-5h and 12PVDF-3h, and FBP of these two membranes were smaller than other three 12PVDF nanofiber membranes. Liquid filtration property of produced electrospun PVDF nanofibers were evaluated by turbidity rejection of a kaolin solution. In correlation with the pore size results it was seen that best turbidity rejection percent was belonging to 12PVDF-5h and worst was belonging to 16PVDF-15min nanofiber membranes. Nevertheless, all of the produced electrospun PVDF nanofiber membranes can be effectively used to remove contaminants from wastewater at a relatively low cost.

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Fabrication and Characterization of Electrospun Nanofibrous Composite Membrane for Air Filtration

Cited by 2 publications

References 13 publications

Cellulose acetate and polyvinylidene fluoride nanofiber mats for N95 respirators

Cellulose acetate and polyvinylidene fluoride nanofiber mats for N95 respirators

Mikrofiltrasyon için elektrolif çekim yöntemi ile üretilmiş PVDF nanolifli membranlar: Gözenek boyutu ve kalınlığının membran performansına etkisi

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