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Tailoring the morphology and crystallinity of poly(L-lactide acid) electrospun membranes

Journal Article


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Abstract


  • Biodegradable poly(L-lactic acid) (PLLA) microfibers were prepared by electrospinning by varying the applied potential, solution flow rate and collector conditions. PLLA fibers with smoothly oriented and random morphologies were obtained and characterized by scanning electron microscopy. The optimum fiber orientation was obtained at 1000 rpm using a 20.3 cm diameter collecting drum, while for higher and lower drum rotation speeds, the rapid random motion of the jets resulted in a random fiber distribution. The deformation of the jet with rapid solidification during electrospinning often results in a metastable phase. PLLA electrospun fibers are amorphous but contain numerous crystal nuclei that rapidly grow when the sample is heated to 70-140 °C. In this way, the degree of crystallinity of the fibers can be tailored between 0 and 50% by annealing. Infrared transmission spectra revealed that the processing conditions do not affect the PLLA samples at the molecular level and that the crystallinity of the samples is related to the presence of α-crystals.

UOW Authors


  •   Ribeiro, Clarisse (external author)
  •   Gomes da Silva Sencadas, Vitor
  •   Costa, Carlos M. (external author)
  •   Gomez Ribelles, J L. (external author)
  •   Lanceros-Méndez, Senentxu (external author)

Publication Date


  • 2011

Citation


  • Ribeiro, C., Sencadas, V., Costa, C. Miguel., Gomez Ribelles, J. Luís. & Lanceros-Méndez, S. (2011). Tailoring the morphology and crystallinity of poly(L-lactide acid) electrospun membranes. Science and Technology of Advanced Materials, 12 (1), 1-9.

Scopus Eid


  • 2-s2.0-79952821420

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4743&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3724

Number Of Pages


  • 8

Start Page


  • 1

End Page


  • 9

Volume


  • 12

Issue


  • 1

Abstract


  • Biodegradable poly(L-lactic acid) (PLLA) microfibers were prepared by electrospinning by varying the applied potential, solution flow rate and collector conditions. PLLA fibers with smoothly oriented and random morphologies were obtained and characterized by scanning electron microscopy. The optimum fiber orientation was obtained at 1000 rpm using a 20.3 cm diameter collecting drum, while for higher and lower drum rotation speeds, the rapid random motion of the jets resulted in a random fiber distribution. The deformation of the jet with rapid solidification during electrospinning often results in a metastable phase. PLLA electrospun fibers are amorphous but contain numerous crystal nuclei that rapidly grow when the sample is heated to 70-140 °C. In this way, the degree of crystallinity of the fibers can be tailored between 0 and 50% by annealing. Infrared transmission spectra revealed that the processing conditions do not affect the PLLA samples at the molecular level and that the crystallinity of the samples is related to the presence of α-crystals.

UOW Authors


  •   Ribeiro, Clarisse (external author)
  •   Gomes da Silva Sencadas, Vitor
  •   Costa, Carlos M. (external author)
  •   Gomez Ribelles, J L. (external author)
  •   Lanceros-Méndez, Senentxu (external author)

Publication Date


  • 2011

Citation


  • Ribeiro, C., Sencadas, V., Costa, C. Miguel., Gomez Ribelles, J. Luís. & Lanceros-Méndez, S. (2011). Tailoring the morphology and crystallinity of poly(L-lactide acid) electrospun membranes. Science and Technology of Advanced Materials, 12 (1), 1-9.

Scopus Eid


  • 2-s2.0-79952821420

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4743&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3724

Number Of Pages


  • 8

Start Page


  • 1

End Page


  • 9

Volume


  • 12

Issue


  • 1