Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Dehydroabietyl glycidyl ether grafted water-soluble hydroxypropyl chitosan and preparation method thereof

A technology of hydroxypropyl chitosan and glycidyl ether, which is applied in chemical instruments and methods, dissolution, transportation and packaging, and can solve problems such as poor solubility, limited application, and impact

Inactive Publication Date: 2020-05-19
YANCHENG INST OF TECH
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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. , 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dehydroabietyl glycidyl ether grafted water-soluble hydroxypropyl chitosan and preparation method thereof
  • Dehydroabietyl glycidyl ether grafted water-soluble hydroxypropyl chitosan and preparation method thereof
  • Dehydroabietyl glycidyl ether grafted water-soluble hydroxypropyl chitosan and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, a dehydroabietyl glycidyl ether grafted water-soluble hydroxypropyl chitosan has the following structure:

[0030]

[0031] The preparation method of dehydroabietyl glycidyl ether grafted water-soluble hydroxypropyl chitosan includes the following steps:

[0032] The first step: according to the mass ratio of sodium hydroxide to chitosan of 1.0~10:1.0, make chitosan alkalized 1.0~48.0 in 10%~50% sodium hydroxide aqueous solution at -20℃~50℃ After hours, disperse the alkalized chitosan in isopropanol according to the mass ratio of chitosan to isopropanol of 1.0:5.0~50.0, and then press the ratio of chitosan and propylene oxide to With a mass ratio of 1.0:0.50~10.0, propylene oxide was added dropwise to the isopropanol in which the alkalized chitosan was dispersed; after the propylene oxide was added, the material was heated in a water bath to increase its temperature to 20~90℃ and Continue to stir the reaction at the corresponding temperature for 1...

Embodiment 2

[0035] The preparation method of dehydroabietyl glycidyl ether grafted water-soluble hydroxypropyl chitosan includes the following steps:

[0036] The first step: according to the mass ratio of sodium hydroxide to chitosan of 1.0~10:1.0, make chitosan alkalized 1.0~48.0 in 10%~50% sodium hydroxide aqueous solution at -20℃~50℃ After hours, disperse the alkalized chitosan in isopropanol according to the mass ratio of chitosan to isopropanol of 1.0:5.0~50.0, and then press the ratio of chitosan and propylene oxide to With a mass ratio of 1.0:0.50~10.0, propylene oxide was added dropwise to the isopropanol in which the alkalized chitosan was dispersed; after the propylene oxide was added, the material was heated in a water bath to increase its temperature to 20~90℃ and Continue to stir the reaction at the corresponding temperature for 1.0-50.0 hours; after the reaction, filter the reaction materials and disperse the resulting filter residue in distilled water, while adding dilute hyd...

Embodiment 3

[0041] The preparation method of dehydroabietyl glycidyl ether grafted water-soluble hydroxypropyl chitosan includes the following steps:

[0042] The first step: according to the mass ratio of sodium hydroxide to chitosan of 1.0~10:1.0, make chitosan alkalized 1.0~48.0 in 10%~50% sodium hydroxide aqueous solution at -20℃~50℃ After hours, disperse the alkalized chitosan in isopropanol according to the mass ratio of chitosan to isopropanol of 1.0:5.0~50.0, and then press the ratio of chitosan and propylene oxide to With a mass ratio of 1.0:0.50~10.0, propylene oxide was added dropwise to the isopropanol in which the alkalized chitosan was dispersed; after the propylene oxide was added, the material was heated in a water bath to increase its temperature to 20~90℃ and Continue to stir the reaction at the corresponding temperature for 1.0-50.0 hours; after the reaction, filter the reaction materials and disperse the resulting filter residue in distilled water, while adding dilute hyd...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses dehydroabietyl glycidyl ether grafted water-soluble hydroxypropyl chitosan and a preparation method thereof. The compound is a compound with a structure as shown in general formula (I), the preparation method comprises two main processes, namely preparation of water-soluble hydroxypropyl chitosan and preparation of dehydroabietic glycidyl ether grafted water-soluble hydroxypropyl chitosan; the non-ionic surfactant dehydroabietyl glycidyl ether grafted water-soluble hydroxypropyl chitosanbased on natural renewable rosin and chitosan as raw materials is obtained. The preparation method comprises the following steps: alkalizing chitosan, and reacting the alkalized chitosan with epoxypropane to generate hydroxypropyl chitosan; hydrolyzing the generated hydroxypropyl chitosan under the assistance of ultrasonic waves to obtain the water-soluble hydroxypropyl chitosan of which the water solubility is remarkably improved and the molecular weight is reduced; reacting thewater-soluble hydroxypropyl chitosan with dehydroabietyl glycidyl ether; finally, generating the novel nonionic surfactant dehydroabietic glycidyl ether grafted water-soluble hydroxypropyl chitosan with the average grafting degree of (2-hydroxy-3-dehydroabietic oxy) propyl on a glucosamine unit reaching 5 to 100% and the average grafting degree of hydroxypropyl reaching 50 to 300%.

Description

Technical field [0001] The invention belongs to the field of nonionic surfactants, and relates to a substituted dehydroabietyl glycidyl ether grafted water-soluble hydroxypropyl chitosan 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 a three-membered phenanthrene ring structure composed of abietic acid, abietic acid and neoabietic acid as main components. [0003] After catalyzed disproportionation of rosin under high temperature conditions, disproportionated rosin with better oxidation resistance and storage stability and dehydroabietic acid as the main component can be produced. Through the combined use of chemical separation and physical separation methods, dehydroabietic acid can be separated from disproportionated rosin, which is widely us...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08B37/08B01F17/56C09K23/56
CPCC08B37/003C09K23/00
Inventor 蔡照胜郭伟王婷黄旭娟朱雪梅张怀红
Owner YANCHENG INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com