Preparation and characterization of chitosan/poly(vinyl alcohol)blend chemically crosslinked by glutaraldehyde for tissue engineering application

Química Nova

Centro Federal de Educação Tecnológica - MG, Belo Horizonte, Brasil¹  Universidade Federal de Minas Gerais, Belo Horizonte, Brasil¹  Mansur, Herman Sander¹  Costa Jr., Ezequiel de Souza¹ 

关键词: chitosan;    poly(vinyl alcohol);    crosslinking.;   

DOI  :  10.1590/S0100-40422008000600034

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

In this study, novel Chitosan/PVA based films were chemically crosslinked by glutaraldehyde, under pH=(4,00 ±0,05), in order to achieve structures tailored for wound tissue engineering applications. Both precursors and developed films were characterized by FTIR, SEM and XRD in order to determine the presence of chemicals groups and nanostructural order, respectively. The results have shown that the glutaraldehyde crosslinking have altered the crystallinity of pure chitosan and the increase on the C=N bands and simultaneous decrease on NH2 bands suggested that Chitosan/GA crosslinking has preference to occur in carbon-2 of the saccharide ring by the Schiff's base reaction. Also, FTIR spectroscopy clearly showed that crosslinking has also taken place with blends of PVA and chitosan. The mechanical properties presented high degree dependence with on the increase of the content of chitosan and glutaraldehyde. The results have indicated that, by controlling the ratio [PVA]/[chitosan] in the blends and the extent of chemical crosslinking, it was possible to tailor the hybrid network produced aiming to obtain properties of interest for the specific application.

【 授权许可】

Unknown