METHOD FOR DEGRADING MOLECULAR WEIGHT OF CHITIN OR CHITOSAN TO LOW MOLECULAR WEIGHT AND METHOD FOR PRODUCING OSSEOUS CONDUCTION MATERIAL

摘要

PROBLEM TO BE SOLVED: To degrade the molecular weight of chitin or chitosan to low molecular weight by a simple operation. SOLUTION: This method for degrading the molecular weight of the chitin or chitosan to low molecular weight comprises irradiating chitin or chitosan with<60> Coγ rays. This method for producing an osseous conduction material comprises a step for preparing sol by dissolving chitin or chitosan into an acidic aqueous solution and kneading the acidic aqueous solution of chitin or chitosan with apatite granules, a step for neutralizing the sol with a neutralizing solution and a step for degrading molecular weight of the chitin or chitosan to low- molecular weight by irradiating the chitin or chitosan with Coγ rays.