Chitosan amphiphilic polymer surfactant, and synthetic method thereof

Abstract

The invention relates to a chitosan amphiphilic polymer surfactant, and a synthetic method thereof. The general structure of the chitosan amphiphilic polymer surfactant is represented by a formula in the invention, wherein n=1-2000. According to the synthesis method, natural high molecular chitosan is taken as a base raw material; -NH2 in chitosan and a fatty aldehyde are subjected to condensation reaction so as to obtain Schiff base; NaBH3CN is used for reduction reaction so as to introduce hydrophobic groups and obtain N-alkylated chitosan; a halide containing hydrophilic group -SO3H and N-alkylated chitosan are subjected to substitution reaction to introduce hydrophilic groups, and the novel degradable chitosan amphiphilic polymer surfactant with obvious amphipathy is obtained. Critical micelle concentration of the chitosan amphiphilic polymer surfactant is 0.043g / ml, surface tension at the critical micelle concentration is 39.5mN.m<-1>. The synthetic method is simple; yield is high; surface properties of the obtained product are excellent; the green safe chitosan amphiphilic polymer surfactant can be prepared with high efficiency and low energy consumption via the environmental-friendly synthesis method; and the synthesis method possesses significant importance on environment protection and resource regeneration.

Description

technical field [0001] The invention relates to a chitosan amphoteric polymer surfactant and a synthesis method thereof. Background technique [0002] With the progress of human society and the rapid development of science and technology, people's demand for environmentally friendly materials is becoming more and more urgent, which makes the development and application of environmentally friendly materials—natural products and their modified products become a research hotspot in the world today. [0003] Chitosan is the product of deacetylation of chitin, which is abundant in nature (especially in the ocean). It is a natural, non-toxic, biocompatible and renewable high-quality natural resource. Because of its unique molecular structure and various excellent functional properties, it has attracted the attention of scientists. Therefore, using the high-quality natural resource of chitosan, a series of new types of chitosan have been prepared through chemical modification meth...

AI Technical Summary

Problems solved by technology

The above-mentioned method mainly has the following disadvantages: one, reacts under acidic or alkaline conditions, and the final reaction of this method can be completed under neutral conditions; two, some of the above-mentioned reactions need chitooligosaccharides as raw materials, and this reaction only Ordinary chitosan is needed, no need to deliberately degrade natural chitosan

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