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Self-repairing polyurethane and preparation method thereof

A polyurethane and self-healing technology, which is applied in the field of self-healing polyurethane and its preparation, can solve problems such as increased material maintenance costs, reduced material safety, and limited use requirements, and achieves excellent room temperature spontaneous self-healing performance, good mechanical properties, The effect of good market application prospects

Active Publication Date: 2019-05-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual use, polyurethane materials will inevitably be damaged by external forces and produce defects, which will lead to the loss or reduction of its related properties, resulting in shortened material life, reduced material safety, and increased material maintenance costs.
However, the vast majority of polyurethane materials currently used cannot be repaired after defects are generated, and some polyurethane materials can be repaired, but the repair process requires additional healing agents or energy (such as heating, light, pressure, etc.) input, which is very important. limits the actual usage requirements
In addition, rarely reported polyurethane materials that can spontaneously self-heal at room temperature (without the need for additional healing agents or energy) are also conditioned by the compromise of mechanical properties, and are accompanied by problems such as high preparation costs and complex synthesis processes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take 2 parts of dimethylglyoxalxime, 20 parts of polytetrahydrofuran ether glycol (Mn=1000), and 0.4 parts of glycerol and dissolve them in 50 parts of acetone; then add 10 parts of isophorone diisocyanate, 0.3 parts of Dibutyltin laurate, react at 55°C for 0.5 hours, add 0.5 parts of copper chloride, and further react at 60°C for 0.5 hours; transfer the reaction solution to a vacuum oven, react at 75°C for 35 hours, and vacuum until no bubbles appear, that is Obtained from Repair Polyurethane.

[0030] The electronic universal material testing machine was used to investigate the mechanical properties and self-healing properties of the materials. The strength of the polyurethane material is 14.8 MPa; after the material is completely cut and spliced ​​together without external force, it is placed at 25°C for 40 hours, and the strength is 8 MPa.

Embodiment 2

[0032] Take 2 parts of dimethylglyoxalxime, 20 parts of polytetrahydrofuran ether glycol (Mn=1000), and 0.4 parts of glycerol and dissolve them in 50 parts of acetone; then add 10 parts of isophorone diisocyanate, 0.3 parts of Dibutyltin laurate, reacted at 55°C for 0.5 hours, added 1 part of copper bis(trifluoromethanesulfonate)imide, and reacted further at 60°C for 0.5 hours; transferred the reaction solution to a vacuum oven, reacted at 75°C for 35 hours, Vacuum until no bubbles appear, that is, self-healing polyurethane.

[0033] The electronic universal material testing machine was used to investigate the mechanical properties and self-healing properties of the materials. The strength of the polyurethane material is 11.5 MPa; after the material is completely cut and spliced ​​together without external force, it is placed at 25°C for 40 hours, and the strength is 8.1 MPa.

Embodiment 3

[0035] Take 2 parts of dimethylglyoxalxime, 20 parts of polytetrahydrofuran ether glycol (Mn=1000), and 0.4 parts of glycerol and dissolve them in 50 parts of acetone; then add 10 parts of isophorone diisocyanate, 0.3 parts of Dibutyltin laurate was reacted at 55°C for 0.5 hours, and further reacted at 60°C for 0.5 hours; the reaction solution was transferred to a vacuum oven, and reacted at 75°C for 35 hours, and vacuumed until no bubbles appeared, which was self-repairing polyurethane.

[0036] The electronic universal material testing machine was used to investigate the mechanical properties and self-healing properties of the materials. The strength of the polyurethane material is 6.8 MPa; after the material is completely cut and spliced ​​together without external force, it is placed at 25°C for 40 hours, and the strength is 3.7 MPa.

[0037] The self-healing polyurethane materials obtained in Examples 1-3 can undergo spontaneous self-healing at room temperature, and the o...

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Abstract

The invention relates to self-repairing polyurethane and a preparation method thereof. Raw materials of the self-repairing polyurethane mainly comprise dioxime. The polyurethane provided by the invention has good mechanical properties and excellent self-repairing properties; and the preparation method is simple, and has low costs and good market application prospects.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a self-repairing polyurethane and a preparation method thereof. Background technique [0002] Polyurethane refers to a class of polymers containing a large amount of carbamate in its molecular structure, also known as polyurethane, and its full English name is polyurethane, or PU for short. Since the performance of polyurethane materials can be realized by adjusting its molecular structure, and the method is relatively simple, polyurethane materials are widely used in construction, automobile, electronics, packaging, shoemaking and other fields. In actual use, polyurethane materials will inevitably be damaged by external forces and produce defects, which will lead to the loss or reduction of its related properties, resulting in shortened material life, reduced material safety, and increased material maintenance costs. However, the vast majority of polyurethane materi...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/38
Inventor 游正伟张璐之刘增贺
Owner DONGHUA UNIV
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