(2-hydroxy-3-dehydroabieticoxy) propyl chitosan-oligosaccharide and preparation method thereof

Abstract

Through the technology comprising the following three main processes such as dehydrogenated rosinalkyl glycidyl ether preparation, water-soluble chitosan-oligosaccharide preparation and (2-hydroxy-3-dehydroabieticoxy) propyl chitosan-oligosaccharide preparation, a nonionic surfactant, namely (2-hydroxy-3-dehydroabieticoxy) propyl chitosan-oligosaccharide, taking rosin and chitosan as raw materials is obtained. The processes are as follows: obtaining the dehydrogenated rosinalkyl glycidyl ether through addition cyclization reaction of dehydroabietic alcohol and epoxy chloropropane; then carrying out reaction between the dehydrogenated rosinalkyl glycidyl ether and the chitosan-oligosaccharide which is 500 to 50,000 in molecular weight and is generated through oxidative degradation of the chitosan; finally, generating the novel nonionic surfactant (2-hydroxy-3-dehydroabieticoxy) propyl chitosan-oligosaccharide of which an average grafting degree of a glucosamine unit ranges from 5% to 300%.

Description

technical field [0001] The (2-hydroxyl-3-dehydroabietyloxy) propyl chitooligosaccharide involved in the present invention and its preparation method are a new type of surfactant in the field of fine organic chemicals based on (2-hydroxyl-3 -Dehydroabietyloxy)propyl group is a lipophilic group and chitooligosaccharide group is a green environmental protection nonionic surfactant (2-hydroxyl-3-dehydroabietyloxy)propyl shell low Glycans and methods for their preparation. Background technique [0002] Pine resin is a secretion produced by pine trees during their natural growth. As a renewable natural resource, rosin can be obtained through fractionation treatment to obtain rosin mainly composed of abietic acid, long-leaf abietic acid and neoabietic acid containing three-membered phenanthrene ring structure resin acids, and Turpentine oil with pinene as the main component. [0003] Rosin can be converted into disproportionated rosin with dehydroabietic acid as the main compone...

AI Technical Summary

Problems solved by technology

However, because the molecular weight of chitosan is tens of thousands or even hundreds of thousands, and there are relatively strong hydrogen bonds between its molecular chains, its solubility in pure water and in alkaline media is still not very good. , thereby affecting and restricting its further application, especially affecting and restricting its use as the basic raw material for the construction of hydrophilic groups for the preparation of surfactants

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