Biomaterials, Biodegradables and Biomimetics Research Group

Papers in Scientific Journals

Characterization of chitosan and polycaprolactone membranes designed for wound repair application

Abstract

Polycaprolactone (PCL) and chitosan (Ch) are nontoxic, biocompatible, and biodegradable polymers of vast interest for wound repair. The aim ofthis work was to prepare Ch/PCL membranes in different proportions (90:10 and 80:20 w/w) in the presence and absence of the surfactant Pluronic F68 (PF68). The membranes were evaluated regarding morphology, thermal behavior, and viscoelastic properties. Sample swelling and degradation in phosphate-buffered saline (PBS), simulated body fluid (SBF), and fetal bovine serum (FBS) were determined by differential scanning calorimetry (DSC) and dynamical mechanical analysis (DMA), while cell toxicity to L929 and Vero fibroblasts was evaluated using the MTT reduction assay and cell proliferation, by DNA quantification and confocal laser microscopy. After 60 days in SBF, marked Ch matrix loss and advanced degradation of PCL particles were noticed by scanning electron microscopy (SEM). No significant differences in melting temperature (T (m)) and enthalpy (Delta H (m)) were detected by DSC. However, the surfactant increased the Delta H (m). After 30 days, the membranes obtained in the presence of PF68 had absorbed more blood serum and were more degraded after exposure to simulated blood fluid for 30 days. All membranes had low cytotoxicity, and higher cell proliferation was noticed for samples obtained in the presence of the surfactant. In conclusion, the Ch/PCL membranes showed satisfactory degradability and biocompatibility, which enhances their potential for application in wound repair.

Journal
Journal of Materials Science
Volume
47
Issue
2
Pagination
659-667
Publisher
SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
ISSN
0022-2461
URL
http://apps.webofknowledge.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=20&SID=R26mYWbF6MIAgV5us3R&page=1&doc=1
Keywords
BLENDS, chitin, Degradation, DRESSINGS, NETWORKS, POLYSACCHARIDES, scaffolds, VISCOELASTIC PROPERTIES
Rights
Open Access
Peer Reviewed
Yes
Status
published
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