Polymeric microtubes for water filtration by co‐axial electrospinning technique

Halaui, Rafi; Zussman, Eyal; Khalfin, Rafail; Semiat, Raphael; Cohen, Yachin

doi:10.1002/pat.3794

Cited by 25 publications

(16 citation statements)

References 25 publications

(23 reference statements)

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“…Using PVP‐K90 core solution in non‐volatile DMSO solvent successfully inhibits the fiber buckling problem. Addition of PEG to the sheath solution could induce nanopores with ∼100–200 nm diameter on the fiber surface, as shown in Figure c …”

Section: Recent Results and Applicationsmentioning

confidence: 98%

Coaxial Electrospinning Formation of Complex Polymer Fibers and their Applications

2019

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The formation of fibers by electrospinning has experienced explosive growth in the past decade, recently reaching 4,000 publications and 1,500 patents per year. This impressive growth of interest is due to the ability to form fibers with a variety of materials, which lend themselves to a large and rapidly expanding set of applications. In particular, coaxial electrospinning, which forms fibers with multiple core−sheath layers from different materials in a single step, enables the combination of properties in a single fiber that are not found in nature in a single material. This article is a detailed review of coaxial electrospinning: basic mechanisms, early history and current status, and an in‐depth discussion of various applications (biomedical, environmental, sensors, energy, catalysis, textiles). We aim to provide readers who are currently involved in certain aspects of coaxial electrospinning research an appreciation of other applications and of current results.

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Section: Recent Results and Applicationsmentioning

confidence: 98%

Coaxial Electrospinning Formation of Complex Polymer Fibers and their Applications

2019

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“…15 It is a simple and straightforward method, in which a single polymer or polymeric blend is pumped at constant rate through a syringe or capillary tube connected to a high DC voltage source. [16][17][18] PVA membranes produced by electrospinning are very common. As a biodegradable, non-toxic or non-carcinogenic, biocompatible synthetic polymer with good mechanical properties, PVA is desirable for many applications.…”

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confidence: 99%

Antibacterial Electrospun Poly(vinyl alcohol)/Enzymatic Synthesized Poly(catechol) Nanofibrous Midlayer Membrane for Ultrafiltration

Coelho

Sampaio

Silva

et al. 2017

ACS Appl. Mater. Interfaces

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Two different nanofibrous antibacterial membranes containing enzymatically synthesized poly(catechol) (PC) or silver nitrate (AgNO, positive control) blended with poly(vinyl alcohol) (PVA) and electrospun onto a poly(vinylidene fluoride) (PVDF) basal disc to generate thin-film composite midlayers were produced for water ultrafiltration applications. The developed membranes were thoroughly characterized in terms of morphology, chemical composition, and general mechanical and thermal features, antimicrobial activity, and ultrafiltration capabilities. The electrospun blends were recognized as homogeneous. Data revealed relevant conformational changes in the PVA side groups, attributed to hydrogen bonding, high thermal stability, and residual mass. PVDF+PVA/AgNO membrane displayed 100% growth inhibition of both Gram-positive and Gram-negative bacteria strains, despite the wide range of fiber diameters generated, from 24 to 125 nm, formation of numerous beads, and irregular morphology. The PVDF+PVA/PC membrane showed a good growth inhibition of Staphylococcus aureus (92%) and revealed a smooth morphology with no relevant bead formations and diameters ranging from 68 to 131 nm. The ultrafiltration abilities of the membrane containing PVA/PC were tested in a dead-end high-pressure cell (4 bar) using a reactive dye in distilled water and seawater. After 5 cycles, a maximum rejection of ≈85% with an average flux rate of 70 L m h for distilled water and ≈64% with an average flux rate of 62 L m h for seawater were determined with an overall salt rejection of ≈5%.

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“…3f). In another study [7] it was found that stable hollow poly(vinylidene fluoride-co-hexafluoro propylene) (PVDF-HFP) microfibres were produced from both immiscible and partially miscible core/shell solution pairs. Together with previous studies, including ours, [13,19,43] our observations show that in coelectrospinning the shell solution has to be sufficiently viscous and electrospinnable by itself in order to obtain stable process and thus core-shell structured or hollow microfibres, irrespective of the miscibility or solubility of the core and sheath solutions; for coelectrospraying, the shell solution, e.g.…”

Section: Co-electrospraying Of Plga With Various Core Materialsmentioning

confidence: 99%

“…Hollow polymeric nano/microstructures with cylindrical or spherical geometries are of special interest for use in encapsulation, [1][2][3] controlled release, [4][5][6] filtration, [7,8] nanoreactors, [9] and tissue microstructure mimics. [10][11][12][13] One important category is hollow microspheres, which currently are mainly fabricated using template and emulsion techniques.…”

Section: Introductionmentioning

confidence: 99%

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Co-electrospraying of tumour cell mimicking hollow polymeric microspheres for diffusion magnetic resonance imaging

Zhou

McHugh

et al. 2019

Materials Science and Engineering: C

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Diffusion magnetic resonance imaging (dMRI) is considered as a useful tool to study solid tumours. However, the interpretation of dMRI signal and validation of quantitative measurements of is challenging. One way to address these challenges is by using a standard reference material that can mimic tumour cell microstructure. There is a growing interest in using hollow polymeric microspheres, mainly prepared by multiple steps, as mimics of cells in healthy and diseased tissue. The present work reports on tumour cell-mimicking materials composed of hollow microspheres for application as a standard material in dMRI. These microspheres were prepared via one-step co-electrospraying process. The shell material was poly(D,L-lactic-co-glycolic acid) (PLGA) polymers with different molecule weights and/or ratios of glycolic acid-to-lactic, while the core was polyethylene glycol (PEG) or ethylene glycol. The resultant co-electrosprayed products were characterised by optical microscopy, scanning electron microscopy (SEM) and synchrotron X-ray micro-CT. These products were found to have variable structures and morphologies, e.g. from spherical particles with/without surface hole, through beaded fibres to smooth fibres, which mainly depend on PLGA composition and core materials. Only the shell material of PLGA polymer with ester terminated, Mw 50,000-75,000 g mol-1, and lactide:glycolide 85:15 formed hollow microspheres via the co-electrospraying process using the core material of 8 wt.% PEG/chloroform as the core. A water-filled test object (or phantom) was designed and constructed from samples of the material generated from co-electrosprayed PLGA microspheres and tested on a 7 tesla MRI scanner. The preliminary MRI results provide evidence that hollow PLGA microspheres can restrict/hinder water diffusion as cells do in tumour tissue, implying that the phantom may be suitable for use as a quantitative validation and calibration tool for dMRI.

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Polymeric microtubes for water filtration by co‐axial electrospinning technique

Cited by 25 publications

References 25 publications

Coaxial Electrospinning Formation of Complex Polymer Fibers and their Applications

Coaxial Electrospinning Formation of Complex Polymer Fibers and their Applications

Antibacterial Electrospun Poly(vinyl alcohol)/Enzymatic Synthesized Poly(catechol) Nanofibrous Midlayer Membrane for Ultrafiltration

Co-electrospraying of tumour cell mimicking hollow polymeric microspheres for diffusion magnetic resonance imaging

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