文献类型：会议论文

英文题名：Preparation and characterization of 6-O-caffeic acid chitosan

作者：Chen, W.P.[1]; Huang, D.J.[1]; Hu, Z.[1]; Zhuang, Y.L.[1]; Lu, S.T.[1]

机构：[1] Department of Applied Chemistry, School of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang, 524088, China

会议论文集：2nd International Conference on Graphene and Novel Nanomaterials, GNN 2020

会议日期：November 1, 2020 - November 4, 2020

会议地点：Xi'an, Virtual, China

语种：英文

外文关键词：Fourier transform infrared spectroscopy - Thermogravimetric analysis - Carbon

外文摘要：The modified chitosan retains the excellent properties of chitosan and can broaden its application. In this paper, an approach of protection-deprotection was used to synthesize 6-O-caffeic acid chitosan with chitosan as the raw material. Firstly, the free amino group on the 2-position carbon of chitosan was protected by phthaloylation, and then the-OH of 6-position carbon of chitosan reacted with caffeic acid by ester condensation. Finally, in the presence of hydrazine hydrate, the amino group was deprotected to form 6-O-caffeic acid chitosan. Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) characterized the structures of the intermediates and products. The results showed that 6-O-caffeic acid chitosan was successfully obtained. Thermogravimetric analysis indicated that 6-O-caffeic acid chitosan had better thermo-stability than chitosan in nitrogen. This will expand the application of chitosan in vaious fields. ? Published under licence by IOP Publishing Ltd.