(2-hydroxyl-3-dehydrofiroxy) propyl ethoxyl chitosan and preparation method thereof

A technology of propyl hydroxyethyl shell and hydroxyethyl chitosan is applied in the field of green environment-friendly non-ionic surfactant and its preparation, and can solve the problems of poor solubility, limited application, influence and the like

Inactive Publication Date: 2014-07-16
YANCHENG INST OF TECH
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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. , thus affecting and restricting its further application, especially affecting and restricting its use as the basic raw material of hydrophilic group for the preparation of surfactants

Method used

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  • (2-hydroxyl-3-dehydrofiroxy) propyl ethoxyl chitosan and preparation method thereof
  • (2-hydroxyl-3-dehydrofiroxy) propyl ethoxyl chitosan and preparation method thereof
  • (2-hydroxyl-3-dehydrofiroxy) propyl ethoxyl chitosan and preparation method thereof

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[0023] The (2-hydroxy-3-dehydroabietyloxy) propyl hydroxyethyl chitosan and its preparation method involved in the invention are characterized by figure 1 The structure shown is a new type of green nonionic surfactant with (2-hydroxy-3-dehydroabietyloxy) propyl group as lipophilic group and hydroxyethyl chitosan group as hydrophilic group (2-hydroxy-3 -Dehydroabietyloxy) propyl hydroxyethyl chitosan, which includes the preparation of dehydroabietyl glycidyl ether, the preparation of water-soluble hydroxyethyl chitosan and (2-hydroxy-3-dehydroabietyloxy) The process including three main processes for preparing propyl hydroxyethyl chitosan is prepared.

[0024] (1) Preparation of dehydroabietyl glycidyl ether: in BF 3 -In the presence of ether, the 3-chloro-2-hydroxypropyl dehydroabietyl ether is obtained by direct reaction of dehydroabietyl alcohol with epichlorohydrin, and then the 3-chloro-2-hydroxypropyl dehydroabietyl ether is obtained in the presence of sodium hydroxide and / or...

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Abstract

A nonionic surfactant (2-hydroxyl-3-dehydrofiroxy) propyl ethoxyl chitosan is prepared from rosin and chitosan as raw materials is obtained through a process including the following three main process steps: preparation of dehydrofiroxy glycidyl ether, preparation of water soluble ethoxyl chitosan and preparation of (2-hydroxyl-3-dehydrofiroxy) propyl ethoxyl chitosan. The preparation method comprises the following steps: carrying out addition and cyclization reactions on dehydroabietinol and epichlorohydrin to obtain dehydrofiroxy glycidyl ether; then, reacting with water-soluble ethoxyl chitosan generated through hydroxyethylating chitosan; and finally generating the novel nonionic surfactant (2-hydroxyl-3-dehydrofiroxy) propyl ethoxyl chitosan, wherein the average grafting degree of (2-hydroxyl-3-dehydrofiroxy) propyl of a glucosamine unit is 5-100% and the average grafting degree of ethoxyl is 5-300%.

Description

Technical field [0001] The (2-hydroxy-3-dehydroabietyloxy) propyl hydroxyethyl chitosan and its preparation method involved in the present invention are a new type of surface active agent in the field of fine organic chemicals. A green environment-friendly non-ionic surfactant with a 3-dehydroabietyloxy) propyl group as a lipophilic group and a hydroxyethyl chitosan group as a hydrophilic group and a preparation method thereof. Background technique [0002] Pine resin is a kind of secretion produced by pine trees in the process of natural growth, which is naturally renewable. As a renewable natural resource, rosin can be obtained by fractionation treatment to obtain rosin with three-membered phenanthrene ring structure resin acid composed of abietic acid, long-leaf abietic acid and neoabietic acid as the main components, and pineapple Turpentine oil with olefin as the main component. [0003] Rosin can be oxidized in the air, but the disproportionated rosin generated after the ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/08B01F17/56C09K23/56
Inventor 蔡照胜齐帆朱雪梅张怀红赵玲玲郁桂云商士斌
Owner YANCHENG INST OF TECH
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