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A star-shaped multi-response shape memory polyurethane composite material and its preparation method

A multi-response and composite material technology, applied in the field of star-shaped multi-response shape memory polyurethane composite materials and its preparation, to achieve the effect of field expansion

Active Publication Date: 2022-05-17
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the multi-response shape memory materials developed and designed are mostly realized by using light-heat and electricity-heat. In essence, the multi-response performance is realized by the heat generated by light or electricity, which is still limited by single heat.

Method used

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  • A star-shaped multi-response shape memory polyurethane composite material and its preparation method
  • A star-shaped multi-response shape memory polyurethane composite material and its preparation method
  • A star-shaped multi-response shape memory polyurethane composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1.1) Synthesis of SMPU10

[0042] (1) Weigh 5.00 g of molten state PCL-2000 (2000 represents molecular weight) with an electronic analytical balance and place it in a three-necked flask, add 18 mL of N, N dimethylformamide (DMF) as a solvent to the bottle, 3-5 Drop hexamethylene diisocyanate (HDI), then add 2-3 drops of dibutyltin dilaurate (DBTL) as a catalyst, and plug the bottlenecks on both sides with a turn-over stopper to prevent DMF volatilization and air from entering; the three-necked flask Install it on the iron stand, install the electric stirrer and oil bath (the height of the silicone oil should not exceed 2 / 3 of the flask body), turn on the electric stirrer to mix the raw materials evenly, turn on the oil bath and set it to 80°C, and heat up Continue to stir in the middle (the speed of the electric stirrer is 400r / min); when the temperature of the oil bath rises to 80°C, draw 0.8mL of HDI with a 2mL needle syringe, and slowly add it into the three-necked f...

Embodiment 2

[0055] 1.1) Synthesis of SMPU10

[0056] (1) Weigh 5.00 g of molten state PCL-2000 (2000 represents molecular weight) with an electronic analytical balance and place it in a three-necked flask, add 19 mL of N, N dimethylformamide (DMF) as a solvent to the bottle, 3-5 Drop hexamethylene diisocyanate (HDI), then add 2-3 drops of dibutyltin dilaurate (DBTL) as a catalyst, and plug the bottlenecks on both sides with a turn-over stopper to prevent DMF volatilization and air from entering; the three-necked flask Install it on the iron stand, install the electric stirrer and oil bath (the height of the silicone oil should not exceed 2 / 3 of the flask body), turn on the electric stirrer to mix the raw materials evenly, turn on the oil bath and set it to 90°C, and heat up Continue stirring (electric stirrer speed is 450r / min); when the temperature of the oil bath rises to 90°C, draw 0.9mL of HDI with a 2mL needle syringe, and slowly add it into the three-necked flask; gather;

[0057]...

Embodiment 3

[0069] 1.1) Synthesis of SMPU10

[0070] (1) Weigh 5.00 g of molten state PCL-2000 (2000 represents molecular weight) with an electronic analytical balance and place it in a three-necked flask, add 20 mL of N,N dimethylformamide (DMF) as a solvent to the bottle, 5-6 Drop hexamethylene diisocyanate (HDI), then add 2-3 drops of dibutyltin dilaurate (DBTL) as a catalyst, and plug the bottlenecks on both sides with a turn-over stopper to prevent DMF volatilization and air from entering; the three-necked flask Install on the iron stand, install the electric stirrer and oil bath (the height of the silicone oil should not exceed 2 / 3 of the flask body), turn on the electric stirrer to mix the raw materials evenly, turn on the oil bath and set it to 85°C, and heat up Continue to stir in the middle (the speed of the electric stirrer is 500r / min); when the temperature of the oil bath rises to 80°C, draw 0.90mL of HDI with a 2mL needle syringe, and slowly add it to the three-necked flask;...

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Abstract

The invention provides a star-shaped multiple-response shape-memory polyurethane composite material. The structural formula of the composite material is: wherein, n, k and m all represent the degree of polymerization, which can be any positive integer; R is prepared in the present invention The multi-response shape-memory polyurethane composite material uses azobenzene with photoisomerization as a photoswitch, which can realize the true light-thermal dual response.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a star-shaped multi-response shape-memory polyurethane composite material and a preparation method thereof. Background technique [0002] Shape memory materials refer to a class of smart materials that change their initial shape under certain conditions and fix the temporary shape, and then return to an initial shape under certain conditions. Due to its large deformation and many other advantages, it has gained widespread attention. [0003] At present, the main research is on shape memory materials that respond to a stimulus, but this material is difficult to meet the requirements of the field of smart materials. Therefore, the development of shape memory materials with multiple responses has become an urgent need and a hot spot at present. At present, most of the multi-response shape memory materials developed and designed are realized by using light-hea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/85C08G18/10C08G18/66C08G18/42C08G18/32C07C245/08
CPCC08G18/85C08G18/10C08G18/6644C08G18/4277C07C245/08C08G2280/00C08G18/3844C08G18/3206Y02P20/10
Inventor 朱佳平班建峰潘露露吴铛
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH