skip to main content
Idioma:

Solvent and concentration effects on the properties of electrospun poly(ethylene terephthalate) nanofiber mats

Veleirinho, Beatriz ; Rei, Manuel F ; Lopes-DA-Silva, J.A

Journal of polymer science. Part B, Polymer physics, 2008-03, Vol.46 (5), p.460-471 [Periódico revisado por pares]

Hoboken: Wiley Subscription Services, Inc., A Wiley Company

Texto completo disponível

Citações Citado por
  • Título:
    Solvent and concentration effects on the properties of electrospun poly(ethylene terephthalate) nanofiber mats
  • Autor: Veleirinho, Beatriz ; Rei, Manuel F ; Lopes-DA-Silva, J.A
  • Assuntos: Applied sciences ; electrospinning ; Exact sciences and technology ; fibers ; Machinery and processing ; nanotechnology ; Plastics ; polyesters ; Polymer industry, paints, wood ; Spinning ; Technology of polymers
  • É parte de: Journal of polymer science. Part B, Polymer physics, 2008-03, Vol.46 (5), p.460-471
  • Notas: http://dx.doi.org/10.1002/polb.21380
    ArticleID:POLB21380
    istex:4576EF433C50478300388121E3FC593BE87E4842
    ark:/67375/WNG-6CFZ79BP-S
    Fundação para a Ciência e Tecnologia (FCT, Lisboa, Portugal) - No. POCI 2010
    FEDER - No. POCI/CTM/58312/04
    ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-1
    content type line 23
  • Descrição: This study describes the preparation and characterization of nanofibrous mats obtained by electrospinning poly(ethylene terephthalate) (PET) solutions in trifluoroacetic acid/dichloromethane (TFA/DCM). Special attention was paid to the effect of polymer concentration and solvent properties on the morphology, structure, and mechanical and thermal properties of the electrospun nonwovens. The results show that the spinnable concentration of PET solution in TFA/DCM solvents is above 10 wt %. Mats have nanofibrous morphology with fibers having an average diameter in the range of 200-700 nm (depending on polymer concentration and solvent composition) and an interconnected pore structure. Higher solution concentration favors the formation of uniform fibers without beads and with higher diameter. Morphology and fiber assembly changed with the solvent properties. Solvent mixtures rich in TFA, i.e., those with higher dielectric constant and lower surface tension, originated fibers with small diameter. However, due to the lower volatility, those solvent mixtures also produced more branched and crosslinking fibers, with less morphologic uniformity. Mechanical properties (Young's modulus, ultimate strength, and elongation at break) and thermal properties (glass transition, crystallization, and melting) have been studied for the PET electrospun nanomats and compared with those of the original polymer. Solvent effect on fiber crystallinity was not significant, but a complex effect was observed on the mechanical properties of the electrospun mats, as a consequence of the different structural organization of the fibers within the mat network. © 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 46: 460-471, 2008
  • Editor: Hoboken: Wiley Subscription Services, Inc., A Wiley Company
  • Idioma: Inglês
Links
Voltar para lista de resultados

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.