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.

Manufacturing and assessment of electrospun PVP/TEOS microfibres for adsorptive heat transformers / Frontera, P.; Kumita, M.; Malara, A.; Nishizawa, J.; Bonaccorsi, L.. - In: COATINGS. - ISSN 2079-6412. - 9:7(2019), p. 443. [10.3390/coatings9070443]

Manufacturing and assessment of electrospun PVP/TEOS microfibres for adsorptive heat transformers

Frontera P.;Malara A.;Bonaccorsi L.
2019-01-01

Abstract

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.
2019
Adsorption
Electrospinning
Microfibre coatings
Polyvinylpyrrolidone
File in questo prodotto:
File Dimensione Formato  
Coatings 2019-09-00443_Frontera.pdf

accesso aperto

Tipologia: Versione Editoriale (PDF)
Licenza: Creative commons
Dimensione 5.85 MB
Formato Adobe PDF
5.85 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12318/107620
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 16
  • ???jsp.display-item.citation.isi??? 16
social impact