Rapid self-repairing materials and application thereof

A self-healing material and self-healing technology, applied in the field of self-healing materials, can solve problems such as poor processability, difficulty in recycling and recycling, and ecological environment pressure.

Active Publication Date: 2019-09-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the imine bond has been widely used by researchers to construct new self-healing polymer materials due to its excellent stability and excellent dynamic exchange capacity, but the existing self-healing materials based on imine bonds have the following points Insufficient (2014, Adv. Mater., 26, 3938.; 2016, Macromolecules, 49, 6277; 2017, Macromol. Rapid Commun., 38, 1700110; 2018, Macromol. Rapid Commun., 39, e1700686.): (1 ) Self-healing materials based on imine bonds often need external stimuli (heating, ultraviolet light, acid-base adjustment) to assist in repairing, and materials prepared without external

Method used

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  • Rapid self-repairing materials and application thereof
  • Rapid self-repairing materials and application thereof
  • Rapid self-repairing materials and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Synthesis of a novel fast self-healing material (1), the structure is as follows:

[0060]

[0061] Specific steps:

[0062] In a dry four-neck flask equipped with a thermometer, a condenser, a dropping funnel, and a nitrogen inlet, add 1000 g of anhydrous toluene, start stirring, and mix 3,3',5,5'-tetraaldehyde-4,4' -Dihydroxybiphenyl solid powder in batches (Z 1 = Z 4 =-OH,Z 2 = Z 3 = Z 5 = Z 6 =-H, 0.30g, 1.00mmol) was added in anhydrous toluene, and then slightly excess 50g of amodimethicone (p 1 =q 1 =3,G 1 =G 2 =G 3 =G 4 =G 5 =G 6 =-CH 3 ,n 1 =300-350, 2.25mmol) into the mixed reaction system. Then add 60g of 4A molecular sieve into the reaction solution to act as a water absorbing agent. Finally, 30 mg of p-toluenesulfonic acid monohydrate catalyst (10 g of toluene solution) was added dropwise into the reaction system. After the dropwise addition, the temperature was raised and controlled to 120° C., the condensed water was turned on, and the...

Embodiment 2

[0068] Synthesis of a novel fast self-healing material (2), the structure is as follows:

[0069]

[0070] Specific steps:

[0071] In a dry four-necked flask equipped with a thermometer, a condenser, a dropping funnel, and a nitrogen inlet, add 1000g of anhydrous toluene, start stirring, and mix 5-chloro-2-hydroxyisophthalaldehyde solid powder in batches (Y 1 =-OH,Y 2 =Y 3 =-H,Y 4 =-Cl, 1.84g, 10.00mmol) was added in anhydrous toluene, and then slightly excess 150g of amodimethicone (p 1 =q 1 =3,G 1 =G 2 =G 3 =G 4 =G 5 =G 6 =-CH 3 ,n 1 =200-220, 12.00mmol) into the mixed reaction system. Then add 60g of 4A molecular sieve into the reaction solution to act as a water absorbing agent. Finally, 30 mg of p-toluenesulfonic acid monohydrate catalyst (10 g of toluene solution) was added dropwise into the reaction system. After the dropwise addition, the temperature was raised and controlled at 120°C, the condensed water was turned on, and the reflux was continued f...

Embodiment 3

[0076] Synthesis of a novel fast self-healing material (3), the structure is as follows:

[0077]

[0078] Specific steps:

[0079] In a dry four-necked flask equipped with a thermometer, a condenser, a dropping funnel, and a nitrogen feed inlet, add 500g of anhydrous toluene, start stirring, and 5-chloro-2-hydroxy isophthalaldehyde solid powder in batches ((Y 1 =-OH,Y 2 =Y 3 =-H,Y 4 =-Cl, 1.84g, 10.00mmol) was added in anhydrous toluene, and then slightly excess 40g of amino-terminated polyethylene glycol (p 2 =q 2 =1,n 2 =100-120, 12.50mmol) into the mixed reaction system. Then add 20g of 4A molecular sieve into the reaction solution to act as a water absorbing agent. Finally, 10 mg of p-toluenesulfonic acid monohydrate catalyst (10 g of toluene solution) was added dropwise into the reaction system. After the dropwise addition, the temperature was raised and controlled to 120° C., the condensed water was turned on, and the reflux reaction was continued for 32 hour...

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PUM

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Abstract

The present invention provides rapid self-repairing materials in view of the problems existing in the field of polymer engineering. A fast exchanged imine bond is combined with an amino-terminated polymer having a good chain fluidity, and the proportions of the imine bond and the amino-terminated polymer material are controlled, so the prepared rapid self-repairing materials have an excellent self-repairing property; and after the materials are continuously damaged by the outside, the materials can recover excellent tensile property, sealing performance and bonding performance at room temperature in just 1-30 min, and can be recycled.

Description

technical field [0001] The invention belongs to the technical field of self-repairing materials, and in particular relates to a novel fast self-repairing material and its application. Background technique [0002] Self-healing material is a new type of intelligent material that integrates perception, drive and information processing, and can self-repair when the material is damaged by simulating the self-repair mechanism of biological damage. Self-healing materials provide an economical and fast new method for repairing micro-cracks in the substrate and repairing surface damage. It provides an ideal way to prolong the service life of materials, improve material safety, reduce waste and optimize economic benefits. It has important applications in the fields of aerospace, military industry, construction and engineering. At present, this material with self-"detection", self-analysis and self-repair functions plays an irreplaceable role in modern industry. [0003] The traditi...

Claims

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Application Information

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IPC IPC(8): C08G77/38
CPCC08G77/38
Inventor 李承辉左景林王大鹏赖建诚赵梓含
Owner NANJING UNIV
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