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Synthesis, characterization and in vitro cell compatibility study of a poly(amic acid) graft/cross-linked poly(vinyl alcohol) hydrogel

Although physically cross-linked poly(vinyl alcohol) (PVA) hydrogel has tunable mechanical properties to match that of soft tissues such as vascular tissues, its hydrophilic nature is not conducive to cell adhesion and spreading. For applications such as small diameter vascular grafts for coronary bypass, both mechanical matching and hemocompatibility are important. Poly(amic acid) (PAA) derived from ethylenediaminetetraacetic dianhydride is a cell compatible polymer. It was grafted/cross-linked onto the physically cross-linked PVA to provide cell compatibility. Functionalization was achieved via a one-step esterification reaction using 1,3-dicyclohexylcarbodiimide as the coupling agent and 4-dimethylaminopyridine as the catalyst. Success of the grafting reaction was verified...

Autoren:   Donna T., Padavan , Amanda M., Hamilton , Leonardo E., Millon , Derek R., Boughner , Wankei, Wan
Journal:   Acta Biomaterialia
Jahrgang:   2010
DOI:   10.1016/j.actbio.2010.07.038
Erscheinungsdatum:   04.08.2010

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