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

A tertiary amine nitrogen-containing polysaccharide derivative with controllable switching of hydrophilicity/hydrophobicity and its preparation method and application

A hydrophobic, tertiary amine-type technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., to achieve the effect of improving adsorption bridging ability, energy saving, emission reduction and environmental protection

Active Publication Date: 2021-06-08
DALIAN UNIV OF TECH
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional cationization reagents only contain one ionizable group, and each time a cationization reagent is introduced, only one cationic group can be introduced into the glycan chain. Regarding the cationization of polysaccharide derivatives that simultaneously introduce two tertiary amine groups rarely reported

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
  • A tertiary amine nitrogen-containing polysaccharide derivative with controllable switching of hydrophilicity/hydrophobicity and its preparation method and application
  • A tertiary amine nitrogen-containing polysaccharide derivative with controllable switching of hydrophilicity/hydrophobicity and its preparation method and application
  • A tertiary amine nitrogen-containing polysaccharide derivative with controllable switching of hydrophilicity/hydrophobicity and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Add 0.1mol of 1# compound, 0.05mol of starch (calculated as polysaccharide unit), 0.03mol of ethoxyglycidyl ether, and 120g of DMSO into the reactor, raise the temperature to 100°C, and react for 10h under stirring. After washing with methanol, filtering, drying and pulverizing, a tertiary amine nitrogen-containing starch derivative with controllable switching of hydrophilicity / hydrophobicity is obtained.

[0052] The above product was subjected to dialysis treatment to remove unreacted reagents, and after drying, infrared analysis was performed. attached figure 1 In the infrared spectrogram of the product, the characteristic peak of the triazine ring (1586,1501cm -1 ), methyl C-H characteristic peak (2922cm -1 ), C-O-C characteristic peak (1006cm -1 ), indicating that compound 1#, ethoxyglycidyl ether, reacted chemically with starch, and obtained tertiary amine nitrogen-containing starch derivatives with controllable switching of hydrophilicity / hydrophobicity.

[0...

Embodiment 2～12

[0057] The method is the same as in Example 1, that is, using chitosan, chitin, cellulose, hemicellulose, guar gum, xylan, glucomannan, barley β-glucan, β-1,3 glucan , glycogen, and cyclodextrin instead of starch, and react with 1# compound and ethoxyglycidyl ether in Example 1 to obtain tertiary amine nitrogen-containing polysaccharide derivatives with controllable conversion of hydrophilicity / hydrophobicity.

Embodiment 13

[0059] Add 0.1 mol of 1# compound, 0.05 mol of starch (calculated as polysaccharide unit), 0.03 mol of benzyl chloride, and 120 g of DMSO into the reactor, raise the temperature to 120°C, and react for 8 hours under stirring. Solids are precipitated in water, washed with anhydrous methanol, and filtered , drying and pulverizing to obtain tertiary amine nitrogen-containing starch derivatives with controllable conversion of hydrophilicity / hydrophobicity.

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 relates to a tertiary amine nitrogen-containing polysaccharide derivative with controllable conversion of hydrophilicity / hydrophobicity, a preparation method and application thereof, and belongs to the technical field of fine chemical application. A tertiary amine-type nitrogen-containing polysaccharide derivative with controllable conversion of hydrophilicity / hydrophobicity, said tertiary amine-type nitrogen-containing polysaccharide derivative with controllable conversion of hydrophilicity / hydrophobicity is a compound with the following general structural formula: [A (B) i (C) j (D) k ] n , where, A glycan unit residue; ‑OH in the glycan unit or H on the amino group is replaced by B, C, D, and the substitution positions of B, C, and D are random substitutions; i, j, k are substitutions Spend. The present invention develops said derivatives because of the existence of tertiary amine groups, which makes the polysaccharide derivatives positively charged in acidic aqueous solution, and the presence of hydrophobic groups improves the adsorption and bridging ability of polysaccharides, which is a kind of High-efficiency flocculant, and its electricity can be adjusted according to the pH of the environment, so as to achieve the purpose of recycling.

Description

technical field [0001] The invention relates to a tertiary amine nitrogen-containing polysaccharide derivative with controllable conversion of hydrophilicity / hydrophobicity, a preparation method and application thereof, and belongs to the technical field of fine chemical application. Background technique [0002] In recent years, with the depletion of petroleum resources, the increasing environmental pollution and the urgent need for sustainable development, natural polysaccharides have attracted more and more attention as a renewable and environmentally friendly resource. They have a wide range of sources, low cost, The characteristics of easy chemical modification. Nitrogen-containing polysaccharide derivatives can be prepared by modifying polysaccharides with nitrogen-containing reagents such as cationic reagents, urea, and acrylamide. Due to the introduction of nitrogen, the polysaccharide derivative has a positive charge, can attract negatively charged substances, and ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/12C08B37/08C08B15/06C08B37/00C08B37/16C08B37/14C08B37/02C02F1/56
CPCC02F1/56C08B15/06C08B31/125C08B37/00C08B37/0012C08B37/0024C08B37/003C08B37/0057
Inventor 张淑芬唐炳涛具本植吕荣文武素丽马威牛文斌李和平
Owner DALIAN UNIV 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