Interconnection of electrospun nanofibers via a post co-solvent treatment and its open pore size effect on pressure-retarded osmosis performance

Park, Chul Ho; Bae, Harim; Kwak, Sung Jo; Jang, Moon Seok; Lee, Jung-Hyun; Lee, Jonghwi

doi:10.1007/s13233-016-4044-2

Cited by 15 publications

(3 citation statements)

References 36 publications

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“…Because fibre mat pore size and distribution appear to have a significant effect on mixing, future studies will look at optimizing pore size and distribution within the fibre-based micromixers. Several labs have reported methods for controlling the size, shape, and distribution of electrospun nanofibre pores, which could be used to examine the relationship between mat porosity and fluid mixing [ 59 , 60 , 61 , 62 ].…”

Section: Discussionmentioning

confidence: 99%

Passive Mixing Capabilities of Micro- and Nanofibres When Used in Microfluidic Systems

Matlock-Colangelo

Colangelo

Fenzl

et al. 2016

Sensors

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Nanofibres are increasingly being used in the field of bioanalytics due to their large surface-area-to-volume ratios and easy-to-functionalize surfaces. To date, nanofibres have been studied as effective filters, concentrators, and immobilization matrices within microfluidic devices. In addition, they are frequently used as optical and electrochemical transduction materials. In this work, we demonstrate that electrospun nanofibre mats cause appreciable passive mixing and therefore provide dual functionality when incorporated within microfluidic systems. Specifically, electrospun nanofibre mats were integrated into Y-shaped poly(methyl methacrylate) microchannels and the degree of mixing was quantified using fluorescence microscopy and ImageJ analysis. The degree of mixing afforded in relationship to fibre diameter, mat height, and mat length was studied. We observed that the most mixing was caused by small diameter PVA nanofibres (450–550 nm in diameter), producing up to 71% mixing at the microchannel outlet, compared to up to 51% with polystyrene microfibres (0.8–2.7 μm in diameter) and 29% mixing in control channels containing no fibres. The mixing afforded by the PVA nanofibres is caused by significant inhomogeneity in pore size and distribution leading to percolation. As expected, within all the studies, fluid mixing increased with fibre mat height, which corresponds to the vertical space of the microchannel occupied by the fibre mats. Doubling the height of the fibre mat led to an average increase in mixing of 14% for the PVA nanofibres and 8% for the PS microfibres. Overall, mixing was independent of the length of the fibre mat used (3–10 mm), suggesting that most mixing occurs as fluid enters and exits the fibre mat. The mixing effects observed within the fibre mats were comparable to or better than many passive mixers reported in literature. Since the nanofibre mats can be further functionalized to couple analyte concentration, immobilization, and detection with enhanced fluid mixing, they are a promising nanomaterial providing dual-functionality within lab-on-a-chip devices.

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Section: Discussionmentioning

confidence: 99%

Passive Mixing Capabilities of Micro- and Nanofibres When Used in Microfluidic Systems

Matlock-Colangelo

Colangelo

Fenzl

et al. 2016

Sensors

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“…In PRO the energy is generated while mixing two different salinity water called osmotic pressure gradient energy [14]. For PRO electrospun nanofibers prepared by a postcosolvent treatment were used by Park et al and generated power density [15]. In PRO process water impulsively permeated through the semipermeable membrane from the feed side into pressurized salty water due to chemical potential gradient across the membrane.…”

Section: Introductionmentioning

confidence: 99%

Generation of Osmotic Power from Membrane Technology

Ingole

2020

The Handbook of Environmental Chemistry

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The whole world is facing challenges for energy supply due to the economic developments, increasing population because of the decrease in oil/gas reserves. Therefore, in current decades, alternative energy sources are in focus to fulfil the energy gap between energy demand and supply. Wind, solar, and biomass are good and sustainable energy sources buthave high installation costs. Henceforth, to find out the cheap, clean, safe, and adequate energy sources is still a prime challenge for the researchers. Power generation by using membrane technology is the new achievement in this list. From the last few decades, pressure-retarded osmosis (PRO) is involved to generate the power, and it offers the opportunity for utilizing osmotic pressure gradients for a wide range of applications. Generating power from the PRO is an emerging platform technology that produces high electric power. In this research area, the membrane science community has expanded huge attention, currently, polymer composite, and nanocomposite membranes are involved in osmosis power generation application. In this chapter, we discuss the treasured insights and tactics for the fabrication and design of highly active antifouling materials and membranes for pressure-retarded osmotic power generation.

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“…A perusal of relevant literature reveals that structurally organized, nonwoven, and therapeutically active 3D nanofibers (Dhivya et al 2015;Sill and Von 2008) mimic the natural niche of the cells and display endless role in tissue engineering (Lin et al 2012), regeneration of cell growth (Khil et al 2003), and cell proliferation (Manea et al 2016;Tian et al 2015) by virtue of their marked surface area (Vasita and Katti 2006;Subbiah et al 2005), pronounced mechanical support (Huang et al 2004;Tan and Lim 2006), and mesh-like network (Wu et al 2015;Park et al 2016). The ability to upload numerous bioactive compounds (Lin et al 2012;Xiao et al 2010) into ultrafine fibrous architecture increases their potential for topical dressing materials and scaffolds (Nagesh et al 2014;Abbaspour et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Tolnaftate–graphene composite-loaded nanoengineered electrospun scaffolds as efficient therapeutic dressing material for regimen of dermatomycosis

et al. 2018

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Graphene "The novel carbon nano-trope" tailors auspicious platform for designing antimicrobial regimen by virtue of its conspicuous molecular interaction with the microorganism. In this work, Tolnaftate (Tf), an antifungal drug, was mingled with Graphene nanoplatelets (Gn) to develop composite (Tf-Gn) via the wet chemical route, embedded in a biocompatible polymeric blend of Eudragit RL100/Eudragit RS100 (EuRL100/EuRS100) and subjected to electrospinning to obtain nonwoven nanoengineered scaffolds (nanofibers) for enhanced anti-dermatophytic virtue. Pursuing cluster of optimization experiments, 20% w/v EuRL100/EuRS 100 was found to be adequate for formation of smooth, defect-free, and regular fibers. Field emission electron microscopy (FESEM) acknowledged zestfully fabrication of smooth, shiny, nano-range, and mesh-like architecture, comprising distinct pockets within their structure. Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimeter (DSC) conceded formation of the composite Tf-Gn, its physical compatibility with polymers, and improved thermal behavior. Exceptional swelling capacity, significant hydrophilicity, and immense drug entrapment efficiency were obtained of nanofibers fabricated from 3:1 ratio of EuRL100/EuRS100 polymers blend owing to relatively higher permeability which gratified essential benchmark for fabrication of nanofibrous scaffold to alleviate fungal infections caused by dermatophytes. In vitro drug release interpreted controlled liberation of Tf in dissolution media, following Korsmeyer-Peppas model kinetics, and suggested a diffusion-based mechanism. Microdilution broth method was performed for in vitro antifungal efficacy against extremely devastating dermatophytes, i.e., anthropophilic Trichophyton rubrum and zoophilic Microsporum canis, exhibited preeminent growth inhibition against T.rubrum and scanty for M.canis. Findings revealed the superior antifungal activity of Tf-Gn-loaded nanofibers as compared to Tf-loaded nanofibers and recommended potential dressing materials for an effective regimen of dermatomycosis.

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Interconnection of electrospun nanofibers via a post co-solvent treatment and its open pore size effect on pressure-retarded osmosis performance

Cited by 15 publications

References 36 publications

Passive Mixing Capabilities of Micro- and Nanofibres When Used in Microfluidic Systems

Passive Mixing Capabilities of Micro- and Nanofibres When Used in Microfluidic Systems

Generation of Osmotic Power from Membrane Technology

Tolnaftate–graphene composite-loaded nanoengineered electrospun scaffolds as efficient therapeutic dressing material for regimen of dermatomycosis

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