A novel chitosan-PEG superabsorbent gel is proposed The gel is directly formed by conjugating chitosan with dicarboxylated polyethylene glycol. The reaction is simple but effective as chitosan aqueous solution with a water soluble/Conjugating (WSC) agent of l-ethyl-3-(3-dimethylaminopropyl-carbodiim ide) hydrochloride (EDCHC1) favors the gelation with PEG at room temperature and in water without adding any organic solvents. The super-water absorbtivity can be controlled by the molecular weight and the content of PEG. The hydroxyapatite is successfully impregnated by alternate soaking in calcium chloride and phosphate solution.
展开▼
