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Self-repairing and force-response polyurethane material and preparation method thereof

A polyurethane material and self-healing technology, applied in the field of polymer materials, can solve the problems of difficulty in ensuring the mechanical properties and self-healing properties of materials at the same time, difficult to find micro-cracks in materials, and complicated synthesis process, and achieve excellent self-repairing performance and cost. The effect of low and simple preparation process

Active Publication Date: 2017-05-31
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the research on self-healing materials has made great progress, there are many problems to be solved, such as high preparation cost, complicated synthesis process, difficult to guarantee the mechanical properties and self-healing properties of materials at the same time, and the materials are damaged or micro-cracks occur. hard to spot

Method used

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  • Self-repairing and force-response polyurethane material and preparation method thereof
  • Self-repairing and force-response polyurethane material and preparation method thereof
  • Self-repairing and force-response polyurethane material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 100 parts of hexamethylene diisocyanate and 50 parts of polytetrahydrofuran ether glycol-1000 were melted and reacted at a temperature of 70°C for 3 hours to obtain a prepolymer, and then 50 parts of 2,6-diaminopyridine was added as a chain extender, and continued in the React at 70°C for 10 hours to obtain a ligand-containing polymer, and then precipitate and dry in methanol to obtain the product.

[0031] Dissolve the above 150 parts of ligand-containing polyurethane in 1500 parts of dichloromethane, add 25 parts of ferric chloride, stir at room temperature for 2 hours, and slowly evaporate the solvent to obtain a self-healing polyurethane material.

Embodiment 2

[0033] 100 parts of hexamethylene diisocyanate and 50 parts of polytetrahydrofuran ether glycol-1000 were melted and reacted at a temperature of 70~℃ for 3 hours to obtain a prepolymer, and then 50 parts of 2,6-diaminopyridine was added as a chain extender, and continued React at a temperature of 70° C. for 10 h to obtain a ligand-containing polymer, and then precipitate and dry in methanol to obtain the product.

[0034] Dissolve the above 150 parts of ligand-containing polyurethane in 1500 parts of dichloromethane, add 25 parts of zinc chloride, stir at room temperature for 2 hours, remove the solvent, and heat press at 120°C to obtain a self-healing material.

Embodiment 3

[0036] Melt 100 parts of hexamethylene diisocyanate and 50 parts of polytetrahydrofuran ether glycol-1000 at a temperature of 70°C for 3 hours to obtain a prepolymer, then add 50 parts of m-phenylenediamine as a chain extender, and continue to heat at a temperature of 70°C After reacting for 10 hours, a ligand-containing polymer was obtained, and then precipitated and dried in methanol to obtain the product.

[0037] Dissolve the above 150 parts of ligand-containing polyurethane in 1500 parts of dichloromethane, add 25 parts of ferric chloride, stir at room temperature for 2 hours, and slowly evaporate the solvent to obtain a self-healing polyurethane material.

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Abstract

The invention relates to a self-repairing and force-response polyurethane material and a preparation method and applications thereof, belonging to the field of polymer materials. The self-repairing and force-response polyurethane material is prepared from the following raw materials: diisocyanate, polyester polyol or polyether polyol, a diamine / diol chain extender and a metal salt cross-linking agent. A novel ligand is adopted as a chain extender preparation material, so that the cost is low, the preparation technology is simple, and large-scale production is easy; the prepared material has excellent performance, higher tensile strength and elongation at break, and excellent self-repairing performance; and the repairing conditions of the material are very mild, the material has the function of inducting external action force, and the fluorescence performance of the material can be changed under the action of force.

Description

technical field [0001] The invention relates to a self-repairing and force-responsive polyurethane material, a preparation method and application thereof, and belongs to the field of polymer materials. Background technique [0002] Generally, artificial polymer materials are prone to aging with the prolongation of use time, and cracks or silver streaks will gradually appear inside and on the surface, and further development will form macroscopic cracks, destroying the overall structure of the material, resulting in a decline in mechanical properties and a reduction in service life. In nature, organisms can self-diagnose, repair and heal after local damage. Therefore, repair is indispensable to prolong the service life of materials and improve the efficiency of use. Approaches to designing repairable polymeric materials include release of repair components, eigenstate repair, and other techniques. The release of repairing components means that the capsules coated with monom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/73C08G18/76C08G18/66C08G18/48C08G18/32C08G18/10C08L75/08C08K3/16
CPCC08G18/10C08G18/4825C08G18/4854C08G18/73C08G18/7671C08K3/16C08K2003/168C08G18/3844C08G18/324C08L75/08
Inventor 夏和生王振华王占华杨莉于长江
Owner SICHUAN UNIV
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