Encapsulation and exfoliation of inorganic lamellar fillers into polycaprolactone by electrospinning

Valentina Romeo, Giuliana Gorrasi, Vittoria Vittoria, Ioannis S. Chronakis

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The present paper reports, for the first time, the successful fabrication of layered double hydroxide (Mg-Al LDH)-reinforced polycaprolactone (PCL) nanofibers by electrospinning. Either the LDH in carbonate form or an LDH organically modified with 12-hydroxydodecanoic acid (LDH-HA) were incorporated into PCL and electrospun using a voltage of 20 KV. The LDH-HA was prepared by an ionic exchange reaction from pristine LDH and encapsulated into PCL from acetone solution's at 15 wt %. The morphological analysis showed pure PCL fibers with an average diameter of 600 +/- 50 nm, and this dimension was maintained in the fibers With LDH, with the inorganic component residing outside the fibers and not exfoliated. At variance, the fibers with the LDH-HA showed a significantly lower average diameter in the range of 350 50 nm, indicating the improved electrospinnability of PCL. Moreover, the inorganic lamellae were exfoliated, as shown by X-rays and residing inside the nanofibers as demonstrated by energy dispersive X-ray spectroscopy analysis. The structural parameters, such as degradation temperature and crystallinity, were investigated for all the samples and correlated with the electrospinning process.
Original languageEnglish
JournalBiomacromolecules
Volume8
Issue number10
Pages (from-to)3147-3152
ISSN1525-7797
DOIs
Publication statusPublished - 2007
Externally publishedYes

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