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A polyacryl glycinamide-polyurethane self-healing elastomer

A technology of polyacryloyl glycinamide and acryloyl glycinamide, which is applied in the field of functional polymer materials, can solve the problems of limited repair times and limited repair efficiency of polyurethane materials, and achieve the effect of improved mechanical properties and excellent self-repair performance

Active Publication Date: 2020-06-09
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the foreign aid type is mainly the microcapsule method, and its main problem is not only the preparation process and cost of the microcapsule, but also the limitation of the number of repairs; the intrinsic type is mainly the introduction of disulfide bonds, Diels- Although reversible bonds or forces such as Alder (DA) reactive groups have a certain strength, their repair requires external stimuli, even complex stimuli, to fully repair the material, and the repair is actually only carried out at the reversible component site. Limits the repair efficiency of polyurethane materials

Method used

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  • A polyacryl glycinamide-polyurethane self-healing elastomer
  • A polyacryl glycinamide-polyurethane self-healing elastomer
  • A polyacryl glycinamide-polyurethane self-healing elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1. Self-healing elastomer PNAGA / PU PTMG -2000- Preparation of 3:1

[0047] (1) Preparation of NAGA monomer: Add glycinamide hydrochloride (0.095 mol) into a three-necked flask placed in an ice bath, blow nitrogen, add 10 ml of ice water, and stir until completely dissolved. 40ml of glacial ether and 55ml of 2M glacial potassium carbonate solution were successively added to the flask, 0.10mol of acryloyl chloride was dissolved in 40ml of ether, and added to the above mixed solution, and then reacted at room temperature for 2h. Adjust the pH of the solution to 2 with 6M hydrochloric acid solution, remove the organic phase, wash the aqueous solution three times with ether, remove the color of the solution with charcoal, then adjust the pH of the solution to neutral with 2M NaOH solution, freeze-dry and then use ethanol / methanol ( 4 / 1, v / v) solution, and after the solvent evaporated, it was dissolved in ethanol / methanol (4 / 1, v / v) solution at 145°C and recrystalliz...

Embodiment 2

[0050] Embodiment 2 self-healing elastomer PNAGA / PU PTMG -1000- Preparation of 3:1

[0051] (1) Preparation of NAGA monomer: Add glycinamide hydrochloride (0.095 mol) into a three-necked flask placed in an ice bath, blow nitrogen, add 10 ml of ice water, and stir until completely dissolved. 40ml of glacial ether and 55ml of 2M glacial potassium carbonate solution were successively added to the flask, 0.10mol of acryloyl chloride was dissolved in 40ml of ether, and added to the above mixed solution, and then reacted at room temperature for 2h. Adjust the pH of the solution to 2 with 6M hydrochloric acid solution, remove the organic phase, wash the aqueous solution three times with ether, remove the color of the solution with charcoal, then adjust the pH of the solution to neutral with 2M NaOH solution, freeze-dry and then use ethanol / methanol ( 4 / 1, v / v) solution, and after the solvent evaporated, it was dissolved in ethanol / methanol (4 / 1, v / v) solution at 145°C and recrystall...

Embodiment 3

[0054] Embodiment 3 Self-healing elastomer PNAGA / PU PTMG -2000- Preparation of 4:1

[0055] (1) Preparation of NAGA monomer: Add glycinamide hydrochloride (0.095 mol) into a three-necked flask placed in an ice bath, blow nitrogen, add 10 ml of ice water, and stir until completely dissolved. 40ml of glacial ether and 55ml of 2M glacial potassium carbonate solution were successively added to the flask, 0.10mol of acryloyl chloride was dissolved in 40ml of ether, and added to the above mixed solution, and then reacted at room temperature for 2h. Adjust the pH of the solution to 2 with 6M hydrochloric acid solution, remove the organic phase, wash the aqueous solution three times with ether, remove the color of the solution with charcoal, then adjust the pH of the solution to neutral with 2M NaOH solution, freeze-dry and then use ethanol / methanol ( 4 / 1, v / v) solution, and after the solvent evaporated, it was dissolved in ethanol / methanol (4 / 1, v / v) solution at 145°C and recrystall...

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Abstract

The invention discloses a polyacryloyl glycinamide-polyurethane self-repairing elastomer, and belongs to the technical field of functional polymer materials. Glycinamide hydrochloride and acryloyl chloride are utilized to synthesize acryloyl glycinamide monomer NAGA with multiple hydrogen bond functions, a polyurethane matrix is obtained through diisocyanate and polyglycol, and in-situ polymerization is carried out on the NAGA monomer in the polyurethane matrix so as to obtain the self-repairing elastomer. When the polyurethane elastomer is compared with other elastomers, not only can self-repairing or self-healing behaviors be achieved under the action of multiple hydrogen bonds, but also the self-repairing behavior in the presence of heat stimulation and water can be achieved separately;and good mechanical performance and repair efficiency can be achieved, and the elastomer can be applied to daily necessities, building materials, protective materials, biomedical materials and otherfields.

Description

technical field [0001] The invention relates to a polyacryloyl glycinamide-polyurethane self-repairing elastic body, which belongs to the field of functional polymer materials. Background technique [0002] Polyurethane elastomers have the characteristics of good wear resistance, mechanical properties, biocompatibility, shock absorption, and easy processing and molding, so they have received extensive attention and application. Although polyurethane has good performance, its performance and service life will be affected due to its susceptibility to damage during production and / or use. There are two kinds of modification methods of polyurethane, the foreign aid type and the intrinsic type. Among them, the foreign aid type is mainly the microcapsule method, and its main problem is not only the preparation process and cost of the microcapsule, but also the limitation of the number of repairs; the intrinsic type is mainly the introduction of disulfide bonds, Diels- Although re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/00C08F220/36C08G18/48C08G18/75C08G18/76
CPCC08F283/006C08G18/4825C08G18/4854C08G18/755C08G18/7671C08F220/36
Inventor 施冬健李雅瑜周天扬王业倪忠斌陈明清
Owner JIANGNAN UNIV