title: Novel hydrogel obtained by chitosan and dextrin-VA co-polymerization.
abstract: A novel hydrogel was obtained by reticulation of chitosan with dextrin enzymatically linked to vinyl acrylate (dextrin-VA), without cross-linking agents. The hydrogel had a solid-like behaviour with G' (storage modulus) >> G'' (loss modulus). Glucose diffusion coefficients of 3.9 x 10(-6) +/- 1.3 x 10(-6) cm(2)/s and 2.9 x 10(-6) +/- 0.5 x 10(-6) cm(2)/s were obtained for different substitution degrees of the dextrin-VA (20% and 70% respectively). SEM observation revealed a porous structure, with pores ranging from 50 microm to 150 microm.
authors.affiliation: Centro de Engenharia Biológica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
authors.forename: Reinaldo
authors.initials: R
authors.lastname: Ramos
authors.forename: Vera
authors.initials: V
authors.lastname: Carvalho
authors.forename: Miguel
authors.initials: M
authors.lastname: Gama
mesh_terms: D000179:Acrylates / Q000737:chemistry*; D001709:Biotechnology / Q000295:instrumentation / Q000379:methods*; D002236:Carbohydrate Conformation; D048271:Chitosan / Q000737:chemistry*; D003912:Dextrins / Q000737:chemistry*; D004058:Diffusion; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000737:chemistry*; D020100:Hydrogels / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D009682:Magnetic Resonance Spectroscopy; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D011108:Polymers / Q000737:chemistry; D012212:Rheology; D013997:Time Factors
chemical_list: D000179:Acrylates; D003912:Dextrins; D020100:Hydrogels; D011108:Polymers; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D048271:Chitosan