(2-Hydroxy-3-dehydroabietyloxy) propyl hydroxyethyl chitosan and its preparation method
A technology of propyl hydroxyethyl shell and hydroxyethyl chitosan, which is applied in the field of green and environment-friendly nonionic surfactant and its preparation, can solve the problems of poor solubility, limited application, influence and the like
Inactive Publication Date: 2016-02-10
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
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[0023] (2-hydroxyl-3-dehydroabietyloxy) propyl hydroxyethyl chitosan and preparation method thereof involved in the invention, is characterized in that a kind of figure 1 The novel green nonionic surfactant (2-hydroxyl-3 - dehydroabietyloxy) propyl hydroxyethyl chitosan, through preparation including dehydroabietyl glycidyl ether, preparation of water-soluble hydroxyethyl chitosan and (2-hydroxy-3-dehydroabietyloxy Base) propyl hydroxyethyl chitosan preparation process including three main processes were prepared.
[0024] (1) Preparation of dehydroabietyl glycidyl ether: in BF 3 -In the presence of ether, after dehydroabietyl alcohol directly reacts with epichlorohydrin to obtain 3-chloro-2-hydroxypropyl dehydroabietyl ether, then in the presence of sodium hydroxide and / or potassium hydroxide, make 3- Chloro-2-hydroxypropyl dehydroabietyl ether is dehydrochlorinated, and finally dehydroabietyl glycidyl ether containing glycidyl and dehydroabietyl structures is obtained afte...
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Through three main processes including the preparation of dehydroabietyl glycidyl ether, the preparation of water-soluble hydroxyethyl chitosan and the preparation of (2-hydroxy-3-dehydroabietyloxy) propyl hydroxyethyl chitosan Technology, obtained a kind of nonionic surfactant (2-hydroxyl-3-dehydroabietyloxy) propyl hydroxyethyl chitosan based on rosin and chitosan as raw materials. The process is as follows: after dehydroabietyl alcohol and epichlorohydrin undergo addition and ring closure reactions to obtain dehydroabietyl glycidyl ether, and then react with chitosan to produce water-soluble hydroxyethyl chitosan Sugar reaction, a new type of nonionic glucosamine unit (2-hydroxy-3-dehydroabietyloxy) propyl group with an average grafting degree of 5-100% and a hydroxyethyl group with an average grafting degree of 5-300% Surfactant (2-hydroxy-3-dehydroabietyloxy) propyl hydroxyethyl chitosan.
Description
technical field [0001] (2-hydroxyl-3-dehydroabietyloxyl group) propyl hydroxyethyl chitosan and preparation method thereof involved in the present invention are a new type of surfactant in the field of fine organic chemicals based on (2-hydroxyl -3-dehydroabietyloxy) propyl group as lipophilic group and hydroxyethyl chitosan group as hydrophilic group, green environment-friendly nonionic surfactant and preparation method thereof. Background technique [0002] Pine resin is a secretion produced by pine trees during their natural growth and is naturally renewable. As a renewable natural resource, rosin can be obtained through fractionation treatment to obtain rosin, which is composed of abietic acid, long-leaf abietic acid and neoabietic acid, etc. Turpentine with olefin as the main component. [0003] Rosin can be oxidized in the air, but the disproportionated rosin produced after the catalytic disproportionation reaction under high temperature has relatively good oxidation...
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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