Unlock instant, AI-driven research and patent intelligence for your innovation.

Biomass polysaccharide/polyisobutylene graft copolymer and preparation method thereof

A graft copolymer and polyisobutylene technology is applied in the field of polymer material synthesis and preparation to achieve the effects of improving solubility, mild reaction conditions, and realizing number and length.

Active Publication Date: 2017-10-31
BEIJING UNIV OF CHEM TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graft copolymers with biomass polysaccharides as polar backbones and synthetic polymer polyisobutylene as nonpolar branches have not been reported yet.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] To 30mL containing hydroxypropyl cellulose (M n =20000) in dichloromethane solution (20g / L), add dicyclohexylcarbodiimide (DCC), 4-dimethylaminopyridine (DMAP) and thioglycolic acid, mix well, so that thioglycolic acid and hydroxypropyl The molar ratio of hydroxyl groups in cellulose was 0.96, the molar ratio of DCC to thioglycolic acid was 0.25, and the molar ratio of DMAP to thioglycolic acid was 0.05, and the reaction was stirred at 35° C. for 24 hours. After the reaction was completed, the reaction solution was cooled to -30° C., filtered with suction, and the insoluble white solid powder was filtered off to obtain a filtrate. The obtained filtrate was rotary evaporated, the solvent was removed, and then dried in a vacuum oven at 40°C for 48 hours to obtain mercaptolated cellulose with a mercapto functionality of 20% (SPC20k-20).

[0030] Under nitrogen protection, the above SPC20k-20, terminal double bond polyisobutylene (M n =2300) and 2,2-dimethoxy-2-phenylacet...

Embodiment 2

[0032] The synthetic method of the mercapto cellulose SPC100k-10 with mercapto functionality of 10% is the same as in Example 1, except that the M of hydroxypropyl cellulose n For 100000, mercaptopropionic acid is used to replace thioglycolic acid, the molar ratio of mercaptopropionic acid to hydroxyl in hydroxypropyl cellulose is 0.64, the molar ratio of DCC to mercaptopropionic acid is 1.0, and the molar ratio of DMAP to mercaptopropionic acid is 0.2 , and the reaction was stirred at 25 °C for 30 hours.

[0033] The synthetic method of the cellulose / polyisobutylene graft copolymer of graft rate 3% is with embodiment 1, just the M of terminal double bond polyisobutylene n 3600, the molar ratio of terminal double-bond polyisobutene to SPC100k-10 thiol is 0.91, the molar ratio of DMPA to terminal double-bond polyisobutene is 0.47, and the ultraviolet light (wavelength is 254nm) is irradiated for 25 minutes.

Embodiment 3

[0035] The synthetic method of the thiolated chitosan SCHI25k-68 that thiol functionality is 68% is the same as embodiment 1, but the molecular weight of chitosan is 25000, and solvent is pyridine, and the mol ratio of the hydroxyl in thioglycolic acid and chitosan is 2.57 , the molar ratio of DMAP to thioglycolic acid was 0.5, and the reaction was stirred at 35°C for 24 hours.

[0036] The synthetic method of the chitosan / polyisobutylene graft copolymer of graft rate 65% is the same as embodiment 1, but the mol ratio of terminal double bond polyisobutylene and SPC I25k-68 is 1.03 in the mercapto group, DMPA and terminal double bond polyisobutylene are 1.03. The molar ratio of isobutylene was 0.63, and ultraviolet light (wavelength: 254 nm) was irradiated for 210 minutes.

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

PropertyMeasurementUnit
degree of graftingaaaaaaaaaa
degree of graftingaaaaaaaaaa
degree of graftingaaaaaaaaaa
Login to View More

Abstract

The invention relates to a graft copolymer with biomass polysaccharide as the main chain and polyisobutylene as the branch chain and a preparation method thereof. It belongs to the field of polymer material synthesis and preparation. The polysaccharide is modified by mercapto functionalization, and then undergoes efficient click chemical reaction with functionalized polyisobutylene containing double bonds at the end, so as to realize the preparation of graft copolymer. The biomass polysaccharide / polyisobutylene graft copolymer provided by the present invention has endowment More excellent comprehensive properties of materials to improve the solubility, melt processing performance, flexibility, wet strength, biocompatibility, chemical stability, and compatibility and combination with other synthetic bulk polymer materials of biomass polysaccharides , to expand its use in the field of environmentally friendly and biomedical materials.

Description

Technical field: [0001] The invention relates to a graft copolymer with biomass polysaccharide as the main chain and polyisobutylene as the branch chain and a preparation method thereof. It belongs to the field of polymer material synthesis and preparation. Background technique: [0002] Biomass polysaccharides are widely found in the stalks of various crops such as corn stalks, wheat stalks, rice stalks, oil crop stalks, bean crop stalks, miscellaneous grain crop stalks, cotton stalks, etc. It is a green and renewable resource. Polysaccharides are the fourth largest resource in the world after coal, oil and natural gas. As a large agricultural country, my country is rich in biomass resources. With the increasing global environmental pollution and energy crisis, the efficient use of green renewable resources has attracted much attention. [0003] Biomass polysaccharides are an important part of organisms and play an important role in controlling cell division and differen...

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): C08G81/02C08B11/04C08B37/08C08B31/00C08H7/00
Inventor 吴一弦郭安儒卢聪杰高青
Owner BEIJING UNIV OF CHEM TECH