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Application of a kind of hydrogel in thermal switch

A hydrogel and thermal switch technology, applied in the field of hydrogel, can solve the problems of inability to apply MEMS, large thermal switch, and slow switching speed

Active Publication Date: 2021-07-06
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This traditional thermal switch has a large volume and slow switching speed, so it cannot be applied in MEMS

Method used

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  • Application of a kind of hydrogel in thermal switch
  • Application of a kind of hydrogel in thermal switch
  • Application of a kind of hydrogel in thermal switch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Weigh 0.073g of melamine and 0.128g of 6,7-dimethoxy-2,4-quinazolinedione and dissolve them in 20ml of deionized water to form a solution, add 2 drops (80-120mg) of dimethylsulfoxide to promote Solvent, stir evenly with a glass rod, and store the solution in a sealed bottle.

[0046]Ultrasound the solution in the sealed bottle prepared above for 40 minutes to promote the further dissolution of the two substances to obtain a mixed solution; put the above mixed solution in a water bath at 80°C for 2 hours at a constant temperature, and then put it in a thermostat at 30°C for 2 hours. , to obtain a gel.

[0047] The above-prepared gel was dispersed on a glass sheet, and dried in a 40° C. oven for 12 hours to obtain dried gel fibers.

[0048] Place the dried gel fiber (xerogel) obtained above under an optical microscope, install the ultrafine probe on the three-dimensional operating platform, pick out a single gel fiber from the xerogel with the tip of the probe, and obtai...

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Abstract

The invention provides the application of a hydrogel in a thermal switch. The present invention proposes to use the dissociation and recombination of hydrogen bonds in a single hydrogel fiber to make a thermal switch, which utilizes the change in the properties of constitutive materials, does not require complex system design, and greatly reduces the device size. The single hydrogel fiber synthesized by the method provided by the invention is in the shape of a rod, the longitudinal dimension can be controlled at about several microns, and the transverse dimension can be controlled between hundreds of nanometers and several microns, which can realize thermal management in micro-electromechanical systems.

Description

technical field [0001] The invention relates to the technical field of hydrogels, in particular to the application of hydrogels in thermal switches. Background technique [0002] Thermal switches have various applications in space and building technology, as well as energy storage systems, with important implications for thermal management. A thermal switch in the traditional sense usually refers to a device that can control thermal contact or thermal separation between two objects. Most thermal switches achieve mechanical on / off contact through complex system design. For example, the air gap type thermal switch, the principle is that there is a very small gap between the cold end heat conduction fin and the hot end heat conduction fin, and the air gap is controlled by using the adsorption and desorption of the adsorbent in the adsorption pump to the gas at different temperatures The disconnection or conduction of the type thermal switch. This traditional thermal switch ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/00H01H37/02
CPCB01J13/0065H01H37/02
Inventor 赵旸孟婷童晨
Owner UNIV OF SCI & TECH OF CHINA