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Open AccessFeature PaperArticle

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

Department of Civil, Energetic, Environmental and Materials Engineering, Mediterranean University of Reggio Calabria, 89134 Reggio Calabria, Italy
Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, 920-1192 Kanazawa, Japan
CNR-ICCOM, Via G. Moruzzi 1, 56124 Pisa, Italy
Author to whom correspondence should be addressed.
Coatings 2019, 9(7), 443;
Received: 7 June 2019 / Revised: 29 June 2019 / Accepted: 11 July 2019 / Published: 16 July 2019
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. View Full-Text
Keywords: electrospinning; adsorption; microfibre coatings; polyvinylpyrrolidone electrospinning; adsorption; microfibre coatings; polyvinylpyrrolidone
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Frontera, P.; Kumita, M.; Malara, A.; Nishizawa, J.; Bonaccorsi, L. Manufacturing and Assessment of Electrospun PVP/TEOS Microfibres for Adsorptive Heat Transformers. Coatings 2019, 9, 443.

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