Efficacy of piezoelectric electrospun nanofiber membrane for water treatment

Bae, Jiyeol; Baek, Inchan; Choi, Heechul

doi:10.1016/j.cej.2016.08.125

Cited by 72 publications

(29 citation statements)

References 30 publications

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“…The deionized water is filled in a reservoir and the filtration pressure is maintained by N 2 or Ar gas. The weight of the permeated water is measured for a certain period of time and applying pressure, and the water permeability is calculated by Equation (6) [127]:

Water permeabilty = \frac{m}{tAP}

where m is the mass of the permeated water (kg), t is the sampling time (s), A is the effective membrane area (m 2 ), and P is the pressure (bar).…”

Section: Characterization Of Ceramic Electrospun Matsmentioning

confidence: 99%

“…According to the turbidity of the samples, rejection rate is calculated using the following equation:

Rejection rate false(% false) = false(1 - \frac{C_{f}}{C_{i}} false) \times 100

where C i is the initial and C f is the concentration of permeate. C i and C f can be calculated by UV-Vis technique or using a turbidimeter [127]. …”

Section: Characterization Of Ceramic Electrospun Matsmentioning

confidence: 99%

“…By homogenous dispersion of HA NPs inside the PA6 NFs, highly porous materials (~77%) are achieved that result in sorption of 60 mg·cm −2 BSA molecules. The other benefit of ceramics elements using in biomedeical purification is their ability to change surface functionality and affinity; higher positive surface electric charge causes more adsorption of negative bio-molecules [127]. Moreover, addition of HA NPs into NFs modifies hydrophobicity of electrospun NFs that adhere to more favorable human cells.…”

Section: Applications Of Ceramic Electrospun Matsmentioning

confidence: 99%

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Electrospun Ceramic Nanofiber Mats Today: Synthesis, Properties, and Applications

2017

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Ceramic nanofibers (NFs) have recently been developed for advanced applications due to their unique properties. In this article, we review developments in electrospun ceramic NFs with regard to their fabrication process, properties, and applications. We find that surface activity of electrospun ceramic NFs is improved by post pyrolysis, hydrothermal, and carbothermal processes. Also, when combined with another surface modification methods, electrospun ceramic NFs result in the advancement of properties and widening of the application domains. With the decrease in diameter and length of a fiber, many properties of fibrous materials are modified; characteristics of such ceramic NFs are different from their wide and long (bulk) counterparts. In this article, electrospun ceramic NFs are reviewed with an emphasis on their applications as catalysts, membranes, sensors, biomaterials, fuel cells, batteries, supercapacitors, energy harvesting systems, electric and magnetic parts, conductive wires, and wearable electronic textiles. Furthermore, properties of ceramic nanofibers, which enable the above applications, and techniques to characterize them are briefly outlined.

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Water permeabilty = \frac{m}{tAP}

where m is the mass of the permeated water (kg), t is the sampling time (s), A is the effective membrane area (m 2 ), and P is the pressure (bar).…”

Section: Characterization Of Ceramic Electrospun Matsmentioning

confidence: 99%

“…According to the turbidity of the samples, rejection rate is calculated using the following equation:

Rejection rate false(% false) = false(1 - \frac{C_{f}}{C_{i}} false) \times 100

where C i is the initial and C f is the concentration of permeate. C i and C f can be calculated by UV-Vis technique or using a turbidimeter [127]. …”

Section: Characterization Of Ceramic Electrospun Matsmentioning

confidence: 99%

Section: Applications Of Ceramic Electrospun Matsmentioning

confidence: 99%

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Electrospun Ceramic Nanofiber Mats Today: Synthesis, Properties, and Applications

2017

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“…They improved the mechanical properties and surface roughness of the membranes by the solventinduced fusion and were able to get clean water with regeneration ability (Bae, Baek, & Choi, 2017a). At their another work, they developed piezoelectric PVDF nanofiber membrane with antifouling ability through the vibrational inducement for water treatment applications (Bae, Baek, & Choi, 2017b). Jang et al prepared PVdF/graphene oxide (GO) hybrid nanofiber membrane for water treatment application.…”

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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“…It should be noted, that PVDF is widely used not only in the membrane industry but also as the most common non-ceramic piezoelectric material in the electrical industry [18,19]. Recently, it was shown [20][21][22][23] that electrical excitation of the piezoelectrically vibrating membranes (as PVDF, as inorganic piezomembranes, both) could increase the flux and markedly reduce membrane fouling. The results of the filtration experiments of Darestani [20,21] using the piezoelectric PVDF materials showed that the vibrations delayed membrane fouling significantly while the membrane flux was maintained close toly at its initial value.…”

Section: Introductionmentioning

confidence: 99%

Nano- and micro-scales structure and properties of the liquid-permeable piezoactive polyvinylidene fluoride films

Kuryndin¹,

Dmitriev²,

Lavrentyev³

et al. 2019

Nanosystems: Phys. Chem. Math.

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Liquid-permeable piezoactive polyvinylidene fluoride films were produced as porous membranes using preparation process including melt extrusion, annealing, cold/hot extension and poling consequent operations. The effect of technological control parameter at extrusion stage (melt draw ratio) on the characteristics of the film structure (overall porosity, liquid permeability and polymorphous composition) was investigated. The values of melt draw ratio which provides the permeability to liquids were established. The structure elements of nano-and micro-levels were determined by a number of experimental techniques. It was proved that the samples contain the pores with sizes 10-50 nm. The dependence of polymorphous composition and content of piezoactive crystalline modification on preparation conditions was analyzed. Permeable polyvinylidene fluoride films were successfully poled, and the stable piezoelectric response of the samples was demonstrated.

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Efficacy of piezoelectric electrospun nanofiber membrane for water treatment

Cited by 72 publications

References 30 publications

Electrospun Ceramic Nanofiber Mats Today: Synthesis, Properties, and Applications

Electrospun Ceramic Nanofiber Mats Today: Synthesis, Properties, and Applications

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

Nano- and micro-scales structure and properties of the liquid-permeable piezoactive polyvinylidene fluoride films

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