33 / 2015-04-29 21:48:04

Preparation of the Polyelectrolyte Complexation Hydrogel from the Derivates of Cellulose

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A novel carboxymethyl cellulose/ hydroxyethyl cellulose-Al3+ (CMC/HEC-Al3+) hydrogel was prepared through the electrostatic complexing between the anionic polyelectrolyte CMC and cationic crosslinking agent Al3+. A sponge and membrane were prepared from the CMC/HEC-Al3+ hydrogel by freeze-drying and oven drying, respectively. The structure and property of the hydrogel were characterized by FTIR, TGA and SEM. The viscoelasticities of the swollen hydrogel were measured by the rheology test. The results indicate that electrostatic effect, physical entanglement and intra- and intermolecular hydrogen bonds contribute the crosslinking network structure and the electrostatic effect is the dominant. In all, both superabsorbent sponge and membrane prepared from CMC/HEC-Al3+ hydrogel showed an excellent swelling behavior and could be used as a wound dressing.