Study on the preparation of crosslinked chitosan-based resin

With chitosan as the raw material, a new type of resin material is synthesized through epichlorohydrin crosslinking. The effects of the reactant ratio, the reaction temperature, the reaction time, the stirring rate and the system pH on the cross-linking rate are studied in detail. The resin material is then characterized by means of IR. The experimental results show that the reaction occurs mainly on the amino and the hydroxyl of chitosan. The chitosan-based resin material with good acidresistivity and high degree of cross-linked can be prepared under the optimal experimental conditions: the system temperature is 50°C, reaction time is 9h, stirring speed is 400r/min, pH value is 12 and the mass ratio of chitosan and epichlorohydrin is 1:6.