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Synthesis of pH-Sensitive and Biodegradable CM-Cellulose/Chitosan Polyampholytic Hydrogels with Electron Beam Irradiation

Department of Biological and Chemical Engineering Gunma University, Tenjin-cho, Kiryu, Gunma, 376-8515 Japan, Zhao_Long{at}nissin.co.jp

Hiroshi Mitomo

Department of Biological and Chemical Engineering Gunma University, Tenjin-cho, Kiryu, Gunma, 376-8515 Japan

Fumio Yosh

Takasaki Radiation Chemistry Research Establishment Japan Atomic Energy Agency, Watanuki-machi, Takasaki Gunma, 370-1292 Japan

A series of novel environment-conscious hydrogels were prepared from carboxymethylated cellulose (CM-cellulose) and chitosan using irradiation without any additives. Gel fraction, mechanical property, and swelling behavior of the hydrogel were studied. The hydrogel blend exhibited improved mechanical property and good swelling in water. The blend hydrogels also displayed typical pH-sensitive swelling behavior. A preliminary biodegradation study confirmed that the hydrogel blends undergo biodegradation by enzymatic degradation.

Key Words: carboxymethylcellulose • chitosan • hydrogel • irradiation • pH sensitive hydrogels • biodegradable.

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