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Journal of Polymer Research

, Volume 18, Issue 6, pp 1903–1917 | Cite as

Electrospinning of polylactide and polycaprolactone mixtures for preparation of materials with tunable drug release properties

  • Luis J. del Valle
  • Roger Camps
  • Angélica Díaz
  • Lourdes Franco
  • Alfonso Rodríguez-Galán
  • Jordi Puiggalí
Original Paper

Abstract

Electrospun microfibers with a variable ratio between polycaprolactone and polylactide homopolymers were prepared from chloroform/acetone solutions. Thermal properties of both as-processed and melt crystallized samples were studied. Time-resolved WAXD patterns were taken during heating runs in order to evaluate the initial crystallinity and changes occurred during cold crystallization. DSC and WAXD experiments clearly indicated that fiber orientation facilitated the crystallization of polylactide, especially when fibers had a high polycaprolactone content. Triclosan could be effectively loaded by electrospinning and was well mixed in the polycaprolactone and polylactide phases. SAXS patterns allowed inferring that both polymers were also well mixed in the electrospun fibers and that triclosan hindered the lamellar stacking of polycaprolactone. Thermal properties, crystallinities and fiber surface morphologies were also significantly modified by the incorporation of triclosan. The release of drug loaded samples into different mixtures of ethanol and Sörensen medium was evaluated and the different affinity between triclosan and the two studied homopolymers was demonstrated. In this way, it was possible to obtain a series of materials with tuned release behavior and tuned antibacterial effect. The biocompatibility of all triclosan loaded polymer mixtures was evaluated by studying cell adhesion and proliferation.

Keywords

Biocompatibility Crystallinity Drug delivery Electrospinning Polycaprolactone Polylactide 

Notes

Acknowledgements

This research has been supported by CICYT and FEDER grants (MAT2009-11503). We are grateful to Drs. François Fauth and Ana Labrador of the CRG BM16 beamline staff of CELLS (Consortium for the Exploitation of the Synchrotron Light Laboratory). We are also grateful to Dr. Trifon Trifonov for FIB micrographs.

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Luis J. del Valle
    • 1
  • Roger Camps
    • 1
  • Angélica Díaz
    • 1
  • Lourdes Franco
    • 1
    • 2
  • Alfonso Rodríguez-Galán
    • 1
  • Jordi Puiggalí
    • 1
    • 2
  1. 1.Departament d’Enginyeria QuímicaUniversitat Politècnica de CatalunyaBarcelonaSpain
  2. 2.Centre de Recerca en NanoEnginyeria (CRNE)Universitat Politècnica de CatalunyaBarcelonaSpain

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