Fundamentals of electrospinning and processing technologies

Angammana, Chitral J.; Jayaram, S.

doi:10.1080/02726351.2015.1043678

Cited by 98 publications

(69 citation statements)

References 75 publications

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“…Electrospinning is a straightforward and inexpensive process that produces nanofibers from submicron down to nanometre diameter [1]. Important applications include tissue engineering, medical healthcare, chemical and biological sensors, wound dressings, drug delivery, protective shields in specialty fabrics, filter media for submicron particles in the separation industry and enzyme immobilization and also in the fabrication of micro / nano-devices [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional computer models of electrospinning systems

2017

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Section: Introductionmentioning

confidence: 99%

Three-dimensional computer models of electrospinning systems

2017

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“…The electrospinning technique involves the use of a high voltage in the range of tenth-kilo volt. The mechanism of an electrospinning has been described elsewhere [5]. Using electrospinning technique, the diameter of electrospun polymer nanofibers ranges from an order of a few nanometers to several micrometers.…”

Section: Introductionmentioning

confidence: 99%

The electrical properties of PEDOT:PSS nanofibers

Chotimah

Winandianto

Munir

et al. 2016

AIP Conference Proceedings

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“…Comparing results in Table 2 and the SEM observations, it can be concluded that at silicate concentrations up to 13 wt.% the modification of the precursor solution characteristics, such as surface tension, viscosity, dielectric properties, had no negative effects on the formation of hybrid microfibres. According to several authors [4,38,44], the decrease of the average diameter of hybrid PVP microfibres observed in samples Mf-5 to Mf-13 has to be mainly attributed to an increase in the dielectric constant of solutions that contributed to the stretching of microfibres during ejection under the influence of electrostatic forces. The anomalous Si concentrations measured by EDX in samples Mf-18 and Mf-24, instead, are an indication that, when the TEOS content is increased beyond a certain quantity, difficulties in obtaining a good homogenization in the precursor mixtures emerged.…”

Section: Microfibres Morphological Characterizationmentioning

confidence: 95%

“…Electrospinning is a technique to produce fibres of sub-micrometric diameter by a relatively simple and inexpensive method [1][2][3]. During the process, a jet of microfibres is continuously ejected towards a collector, thus forming a non-woven mat covering the surface [4,5]. The material typically used in electrospinning is a polymeric solution and there are many applications in which electrospun microfibres can be used, as demonstrated by the numerous patents and publications even in the medical and biomedical fields [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Manufacturing and Assessment of Electrospun PVP/TEOS Microfibres for Adsorptive Heat Transformers

et al. 2019

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A new adsorbent coating for the adsorber unit of an adsorption heat pump made of hybrid, organic-inorganic microfibres was prepared and characterized. Different coatings were obtained by the electrospinning of polyvinylpyrrolidone (PVP) solutions added with different quantities of tetraethyl orthosilicate (TEOS). PVP is a polymer with water adsorption capability and the TEOS addition allowed to increase the thermal stability of microfibres. The aim, indeed, was to preserve the polymeric structure of microfibres in order to obtain coatings with high flexibility and mechanical strength. The results demonstrated that TEOS concentrations in the range of 5-13 wt.% produced microfibre coatings of non-woven textile structure with both good water affinity and good thermal stability. SEM images of coatings showed that the deposited microfibre layers have both a high surface area and a high permeability representing a significant advantage in adsorption systems.Coatings 2019, 9, 443 2 of 12 and silica tetrahedra that form a crystalline nanoporous structure with hydrophilic behavior [14,15]. Although zeolites are the ideal adsorbing solid for the elevated thermal stability, their use in adsorption systems is limited by the high regeneration temperatures. The desorption of water vapor from the zeolite porosity requires temperatures above 300 • C for the complete material dehydration [16,17]. The ideal exploitation of this technology, indeed, is the coupling with low temperature heat sources (T < 150 • C), like solar thermal panels or waste combustion fumes [11,18]. For such a reason, other adsorbing materials have been proposed and sometimes used in solid sorption applications, like silica gel, alumino-phosphour zeotypes (AlPO and SAPO), and metalorganic frameworks (MOF). AlPO and SAPO are interesting for their high adsorption capacity, their good structural stability, and low regeneration temperatures but they are difficult to find on the market and costly [19,20]. MOF are new adsorbing materials with large water capacity and low regeneration temperatures, but their structural stability is still an open issue and they are expensive and difficult to find in large quantities [21,22]. Among others, silica gel is the adsorbent most used in commercial adsorption chillers mainly for its low cost and large availability on the market although it shows a lower water adsorption capacity and problems of morphological and thermal stability [22][23][24][25].Over the years, the scientific community has focused not only on the development of the porous material but also on the engineering of the absorber, the heat exchanger module where the adsorbent material is located. In order to reduce heat transfer resistances, the porous material distribution around the heat exchanger surfaces is very important. Zeolites and silica gel are generally used in form of granules or powder and the simplest and most used solution is to fill the free space between the fins of the heat exchanger with the adsorbent granules. In this case, however, the poor co...

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Fundamentals of electrospinning and processing technologies

Cited by 98 publications

References 75 publications

Three-dimensional computer models of electrospinning systems

Three-dimensional computer models of electrospinning systems

The electrical properties of PEDOT:PSS nanofibers

Manufacturing and Assessment of Electrospun PVP/TEOS Microfibres for Adsorptive Heat Transformers

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