Preparation and Characterization of Formaldehyde Crosslinked Chitosan
Using formaldehyde as a crosslinking reagena novel cross-linked chitosan resin was synthesized by orthogonal. The resin material with good properties of sphericity and acidresistivity can be prepared under the optimal experimental conditions, which are found to be 1:6 for the ratio of chitosan and formaldehyde, 60°C for the temperature, 1 h for the reaction time, 640r/min for the stirring rate and 9 for the pH, and the cross-linking rate under the optimal conditions is 401.86%. SEM shows the surface morphology changes of raw materials and products; IR of the raw materials and products shows that the reaction occurs mainly on the amino and the hydroxyl of chitosan, and TG shows that the crosslinking reaction of chitosan can change its heat resistance.
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
J. Q. Xue et al., "Preparation and Characterization of Formaldehyde Crosslinked Chitosan", Advanced Materials Research, Vols. 239-242, pp. 279-282, 2011