id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ajst-1052	Hu, Yifeng	A Review of the Current Status of Research on Chitosan-Modified Polymer	2022	4	.pdf	application/pdf	3452	171	44	In recent years, reports on the modification of chitosan by physical and chemical methods have emerged, and many scholars have physically and chemically modified chitosan to give new properties and structures to chitosan materials, and the modified chitosan materials have been widely used in the fields of medicine, chemical industry and environmental protection, etc. Alkylation of Chitosan The alkylation reaction of chitosan is mainly through chemical reactions N alkylation reaction on chitosan molecules, generally used is Schiff base reaction and halohydrocarbon substitution reaction, the introduction of alkanes can weaken the hydrogen bonds within the chitosan molecule and increase the solubility of chitosan materials, Lee [18] experimentally found that lower alkylation can destroy the crystalline structure of chitosan into, but too long alkyl chains will reduce the derivatives water solubility [19], and this property was also used to control the hydrophilic properties of chitosan materials by controlling different degrees of alkylation.	cache/ajst-1052.pdf	txt/ajst-1052.txt