Mechanically enhanced PES electrospun nanofiber membranes (ENMs) for microfiltration: The effects of ENM properties on membrane performance

Bae, Jiyeol; Baek, Inchan; Choi, Heechul

doi:10.1016/j.watres.2016.09.020

Cited by 51 publications

(32 citation statements)

References 29 publications

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“…The initial pure water fluxes of ENM 30, ENM 30-0.01, and ENM 30-0.10 were obtained as 15,900, 11,400, and 10,800, respectively (Figure 5a). This decline tendency is similar to the results of other research groups [30,31]. We found that three PES ENMs exhibited higher pure water fluxes compared with the commercial GSWP 0.22 µm membrane and had a pure water flux of 9155 L/(m 2 h bar) at 0.17 bar [32].…”

Section: Pure Water Flux and Ps Retention Testsupporting

confidence: 90%

Parametrization Study of Electrospun Nanofiber Including LiCl Using Response Surface Methodology (RSM) for Water Treatment Application

Bae

Kim²,

Park

et al. 2020

Applied Sciences

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The influence of the electrospinning parameters on the diameter of the polyethersulfone (PES) nanofibers was demonstrated using response surface methodology. The electrospinning parameters studied were lithium chloride (LiCl) concentration, PES concentration, feed rate, and tip-to-collector distance. The average fiber diameter was correlated to these factors by using a second-order polynomial function at a 95% confidence level. The statistical analysis indicated that LiCl concentration, PES concentration, and feed rate had the significant connection with the fiber diameter, and LiCl concentration was the most important factor in determining the fiber diameter. When LiCl concentration increased, the fiber diameter decreased, because with more LiCl that is added, more applied voltage is needed to overcome the electrostatic attractions. The interactive effect between PES concentration and feed rate, the interactive effect between PES concentration and tip-to-collector distance, and the quadratic coefficients of LiCl concentration were also found to be significant. The adjusted determination coefficient (Radj2) of the model was calculated to be 0.9106. The water flux measurements showed that the decrease in the fiber diameter of the membrane caused the decrease in the initial pure water flux. The retention tests with 0.6 μm polystyrene (PS) suspension indicated that as the fiber diameter decreased, the pore sizes decreased and the particle removal efficiency increased.

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Section: Pure Water Flux and Ps Retention Testsupporting

confidence: 90%

Parametrization Study of Electrospun Nanofiber Including LiCl Using Response Surface Methodology (RSM) for Water Treatment Application

Bae

Kim²,

Park

et al. 2020

Applied Sciences

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“…Sizes of kaolin particles were measured by Malvern Hydro 2000S Master Sizer v3.50, Malvern Instruments Ltd. Turbidity rejection of the PVDF nanofiber membranes were tested using a dead-end filtration cell, Amicon® stirred cell (UFSC05001) (Fig. 1) (Bae, Baek, & Choi, 2016). The cell has a volume of 50mL and an effective membrane filtration area of 44.5 mm 2 .…”

Section: Evaluation Of the Liquid Filtration Performancementioning

confidence: 99%

“…(1)(Bae et al, 2016;Y. Liu, Wang, Ma, Hsiao, & Chu, 2013): Schematic diagram of a dead-end-cell device (Amicon® Stirred Cell, Merck (EMD Millipore Corporation, 2015).…”

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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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“…A chemical treatment can also result in increased mechanical properties of a nanofiber mat [ 26 ]. Joining the fibers at the contact points by letting solvent remain on the nanofiber mat after electrospinning can support the mechanical properties as well [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Preliminary Study of Ultrasonic Welding as a Joining Process for Electrospun Nanofiber Mats

et al. 2018

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Electrospinning can be used to create nanofiber mats for diverse applications, from wound dressings and tissue engineering to filters for medical and biotechnological applications. In most of these applications, it is necessary to fix the nanofiber mat on a macroscopic textile fabric, on another nanofiber mat or within a frame to keep it at the desired position. Due to their extremely low thickness and areal mass, however, nanofiber mats are easily destroyed by sewing, and in several situations glued bonds are too thick and not flexible enough. Here we report on ultrasonic welding of polyacrylonitrile nanofiber mats, suggesting this method as a joining process without destruction of the mat morphology for thermoplastic nanofiber mats. A variety of welding patterns results in different adhesion forces between both joined nanofiber mats and different failure mechanisms, with some welding patterns enabling bonding stronger than the mats themselves. Our findings show that ultrasonic welding is a possible joining method for polyacrylonitrile nanofiber mats.

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Mechanically enhanced PES electrospun nanofiber membranes (ENMs) for microfiltration: The effects of ENM properties on membrane performance

Cited by 51 publications

References 29 publications

Parametrization Study of Electrospun Nanofiber Including LiCl Using Response Surface Methodology (RSM) for Water Treatment Application

Parametrization Study of Electrospun Nanofiber Including LiCl Using Response Surface Methodology (RSM) for Water Treatment Application

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

Preliminary Study of Ultrasonic Welding as a Joining Process for Electrospun Nanofiber Mats

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