A self-healing light-controlled plastic polyurethane elastomer material, its preparation and application

A polyurethane elastomer and elastomer material technology, applied in the field of flexible intelligent drive materials, can solve problems such as slow response to external stimuli and complex structural design, and achieve excellent self-healing effect, simple pre-treatment, and short healing time

Active Publication Date: 2020-05-19
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a self-healing light-controlled plastic polyurethane elastomer material, its preparation method and application. Color-changing molecules and polyols are used as cross-linking agents for elastomer materials to construct polyurethane elastomer materials with double cross-linked network structures, and correspondingly obtain a smart deformable polyurethane material that responds quickly to ultraviolet light, and the material has Self-healing function, thereby solving technical problems such as slow response to external stimuli, or irreversibility, or complex structural design existing in the smart driving materials of the prior art

Method used

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  • A self-healing light-controlled plastic polyurethane elastomer material, its preparation and application
  • A self-healing light-controlled plastic polyurethane elastomer material, its preparation and application
  • A self-healing light-controlled plastic polyurethane elastomer material, its preparation and application

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preparation example Construction

[0048] The invention provides a kind of preparation method of described polyurethane elastomer material, comprises the steps:

[0049] (1) Under light-shielding conditions and under the protection of inert gas nitrogen, the organic solution of the oligomer diol, tetrahydroxyl functionalized hexaaryl biimidazole molecules, catalyst and polyhydric alcohol after drying treatment are mixed and stirred to obtain Mixed solution; drying treatment The specific steps are: vacuum-dry the oligomer diol at 70-90° C. for 1 to 3 hours. The organic solvent used in the organic solution is anhydrous tetrahydrofuran (THF), and the catalyst is dibutyltin dilaurate (DBTDL). The purpose of drying the oligomer diol is to remove the moisture therein, so as to avoid the reaction between water molecules and diisocyanate, resulting in that the polyurethane elastomer material of the present invention cannot be obtained. The purpose of inert gas protection is to avoid the participation of oxygen in the ...

Embodiment 1

[0059] Using PTMG as oligomer diol, 2-Cl-4-diol-HABI molecular switch and glycerol as crosslinking agent were used to synthesize double crosslinked self-healing light-controlled plastic polyurethane elastic material. The molecular structure of 2-Cl-4-diol-HABI is as follows.

[0060]

[0061] Weigh PTMG (1.9g; 1.9mmol) into a round bottom flask, vacuum-dry at 70°C for about 1h, and cool to room temperature under the protection of nitrogen atmosphere. Then weigh glycerol (42mg; 0.456mmol) and inject it into the above round bottom flask, then weigh 2-Cl-4-diol-HABI (128mg; 0.152mmol), dissolve it with 10ml anhydrous THF, mix it with PTMG, and add Stir the catalyst DBTDL vigorously for half an hour; extract 0.33ml of HDI with a 1ml syringe and add it to the above mixed solution; vacuumize the mixed solution three to four times, stir for about ten minutes, then spin steam, completely remove THF, and pour into the mold . Put it into a vacuum drying oven, react under vacuum con...

Embodiment 2

[0063] Using PTMG as oligomer diol, 2-Cl-4-diol-HABI molecular switch and glycerol as crosslinking agent were used to synthesize double crosslinked self-healing light-controlled plastic polyurethane elastic material.

[0064] Weigh PTMG (3.8g; 3.8mmol) into a round bottom flask, vacuum-dry at 70°C for about 1h, and cool to room temperature under the protection of nitrogen atmosphere. Then weigh glycerol (112mg; 1.216mmol) and inject it into the above round bottom flask, then weigh 2-Cl-4-diol-HABI (128mg; 0.152mmol), dissolve it with 10ml anhydrous THF, mix it with PTMG, and add Stir the catalyst DBTDL vigorously for half an hour; extract 0.66ml of HDI with a 1ml syringe and add it to the above mixed solution; vacuumize the mixed solution three to four times, stir for about ten minutes, then spin steam to remove THF completely, and pour it into the mold . Put it into a vacuum drying oven, react under vacuum conditions at 45°C for 24h, cool to room temperature and take it out....

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Abstract

The invention discloses a polyurethane elastomer material and a preparation method thereof. By taking hexaarylbiimidazole (HABI) photochromic molecules and polyhydric alcohol as cross-linking agents of an elastomer material, the polyurethane elastomer material with a double-cross-linking network structure is constructed, and an intelligent deformation polyurethane material having rapid response toultraviolet light is correspondingly obtained and has a self-healing function. A polyurethane elastomer has good mechanical and physical properties of tenacity, ductility, fatigue resistance and thelike, is taken as an intelligent material and has potential application markets in drivers, software robots, artificial biological organs, sensors, manufacturing industry, medical treatment, wearableequipment, medical treatment instructions and the like.

Description

technical field [0001] The invention belongs to the technical field of flexible intelligent driving materials, and in particular relates to a self-healing light-controlled plastic polyurethane elastomer material, its preparation method and application. Background technique [0002] Self-healing photoplastic polyurethane elastomers belong to the category of polymer smart actuation materials, also known as actuators or artificial muscles, which respond to external stimuli and can change their shape and size. In recent years, with the deepening of research and the increasing demand for production and living, the research on flexible actuators and stimulus-responsive materials is booming. Among them, polymer materials are widely used in the field of intelligent material research and development due to their advantages of low manufacturing cost and easy processing. play a leading role in. These materials have the potential to revolutionize healthcare, wearable devices, artificia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/73C08G18/66C08G18/48C08G18/32
CPCC08G18/3206C08G18/3848C08G18/48C08G18/6666C08G18/6677C08G18/73
Inventor 朱明强向诗力李冲赵鹏举
Owner HUAZHONG UNIV OF SCI & TECH
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