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Ester group and cyano group co-modified SBS thermoplastic dielectric elastomer material and preparation method thereof

A dielectric elastomer and ester-based technology, applied in the field of new SBS-based thermoplastic dielectric elastomer materials and their preparation, can solve the problems affecting the development of dielectric elastomer drivers, increase in dielectric loss, and high dielectric loss, and achieve The effect of improving electric drive performance and increasing dielectric constant

Active Publication Date: 2021-04-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the addition of ceramic fillers can significantly increase the dielectric constant of the material, it usually has a higher modulus after being added to the composite material, and there will be more defects inside the composite material, resulting in a decrease in the breakdown voltage of the composite material and a decrease in the dielectric loss. Increase
For conductive fillers, due to the poor interaction between the filler and the matrix, there are more defects in the composite material. Usually, the dielectric loss of the composite material is relatively high, and the modulus generally increases, which affects its performance as a dielectric material. Development of Electroelastomer Actuators

Method used

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  • Ester group and cyano group co-modified SBS thermoplastic dielectric elastomer material and preparation method thereof
  • Ester group and cyano group co-modified SBS thermoplastic dielectric elastomer material and preparation method thereof
  • Ester group and cyano group co-modified SBS thermoplastic dielectric elastomer material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) The specific preparation steps are as follows: 10.6 g of mercaptopropionic acid and 15 g of cyanoethanol are added to a three-necked beaker, and 100 mL of water-carrying agent toluene and 0.1 to 0.5 g of catalyst p-toluenesulfonic acid are added to the bottle, Under the protection of argon, heat and reflux at 100°C to separate water for 12 hours and then purify to obtain cyanoethyl mercaptopropionate;

[0020] (2) Dissolve 1 g of SBS in 50 mL of tetrahydrofuran, add 11 g of cyanoethyl mercaptopropionate prepared in step (1) and 0.16 g of DMPA, and react under ultraviolet light for 30 min. After the reaction, the solution obtained was evaporated at 40°C with a vacuum rotary evaporator to remove part of the solvent, and then precipitated in ethanol. After filtration, the precipitate was dissolved in tetrahydrofuran and then purified by ethanol precipitation. After repeated three times, vacuum drying was used to obtain the new SBS base. thermoplastic dielectric elastom...

Embodiment 2

[0022] (1) Add 10.6g of mercaptopropionic acid and 15g of cyanoethanol into a three-necked beaker, and add 100mL of water-carrying agent toluene and 0.1 to 0.5g of catalyst p-toluenesulfonic acid into the bottle, under argon protection Heated at reflux at 100°C for 12 hours and then purified to obtain cyanoethyl mercaptopropionate;

[0023] (2) Dissolve 1 g of SBS in 50 mL of tetrahydrofuran, add 11 g of cyanoethyl mercaptopropionate prepared in step (1) and 0.25 g of DMPA, and react under ultraviolet light for 40 min. After the reaction, the solution obtained was evaporated at 40°C with a vacuum rotary evaporator to remove part of the solvent, and then precipitated in ethanol. After filtration, the precipitate was dissolved in tetrahydrofuran and then purified by ethanol precipitation. After repeated three times, vacuum drying was used to obtain the new SBS base. thermoplastic dielectric elastomer material. The results show that the dielectric constant can reach 15 at 1KHz, ...

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Abstract

The invention discloses an SBS-based thermoplastic dielectric elastomer material and a preparation method thereof. The preparation method includes the following steps that firstly, mercaptopropionic acid nitrile ethyl ester (HSCH2CH2COOCH2CH2CN) is prepared through an esterification reaction of cyanoethanol and mercaptopropionic acid, SBS is modified through a click reaction, ester groups and cyano groups with high polarizability are grafted to side chains of SBS simultaneously, and the branched chain functionalized SBS thermoplastic dielectric elastomer material is prepared. The technical route is simple, the grafting rate can be controlled by regulating and controlling the reaction time so as to regulate and control the dielectric constant and the electric drive strain, and the actual application of the intrinsic thermoplastic dielectric elastomer can be promoted.

Description

technical field [0001] The invention belongs to the technical field of dielectric elastomer preparation, and in particular relates to a novel SBS-based thermoplastic dielectric elastomer material and a preparation method thereof. Background technique [0002] With the rapid progress of science and technology and the rapid development of intelligence, artificial intelligence equipment has begun to develop in the direction of miniaturization and light weight. As a new type of electroactive polymer, dielectric elastomers can be coated with electrodes on both sides to form dielectric elastomer actuators, which are widely used in small micro-robots, micro-valve ports, micro-aircraft and other fields. Due to the need for high driving voltages of dielectric elastomers, the development and application of their drivers are limited, especially in the field of biomedicine, where high driving voltages are dangerous factors for both organisms and devices. [0003] To reduce the driving ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/34C08F297/04
CPCC08F8/34C08F297/04
Inventor 刘雷鹏谢蕊颖张康宁吕生华刘锦茹杨俊杰
Owner SHAANXI UNIV OF SCI & TECH
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