A self-absorbing hydrogel, preparation method and thermal management method based thereon

A hydrogel and gel technology, applied in the preparation method and thermal management based on it, in the field of self-moisture hydrogel, can solve the problem that the hydrogel cannot realize automatic water replenishment, achieve remarkable heat dissipation effect, low cost, and heat dissipation Excellent effect

CN109943002BActive Publication Date: 2020-08-07纾酷科技(深圳)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-08-07

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Abstract

The invention discloses a self-absorbing hydrogel, a preparation method and a heat management method based on the self-absorbing hydrogel. The self-absorbing hydrogel is a hygroscopic hydrogel composed of a salt water-resistant gel and a certain concentration of hygroscopic salt solution. In the preparation process, the hydrogel is first prepared; then the hydrogel is heated and dried, and then the dried hydrogel is soaked in high-concentration hygroscopic salt until the hydrogel is completely swollen, and it is self-hygroscopic when taken out Hydrogels. The self-hygroscopic hydrogel can absorb moisture in the air for automatic water replenishment at low temperature, and can take away a large amount of heat when water evaporates at high temperature, and can realize the automatic cycle of moisture absorption and heat dissipation. The invention has the characteristics of simple structure and excellent heat dissipation ability, and can intelligently manage heat for various objects that need heat dissipation by imitating biological sweating and heat dissipation. It can automatically dissipate heat for the heating element without external power, and has the characteristics of no noise, small size, low cost, convenience and intelligence.
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Description

technical field

[0001] The invention belongs to the field of heat dissipation and relates to a heat dissipation technology, in particular to a self-hygroscopic hydrogel, a preparation method and a heat management method based thereon. Background technique

[0002] When almost all electronic light-emitting, computing and energy conversion devices are in use, most of the energy is converted into heat energy. If the heat cannot be dissipated in time, the temperature of the device will increase. High temperature will affect the performance of the device, such as affecting the service life of the diode, reducing the stability and reliability of the chip, reducing the energy conversion efficiency of the solar cell, and so on. Moreover, driven by Moore's Law and the integrated circuit industry, electronic equipment is developing towards integration and miniaturization. Therefore, the problem of heat treatment has even become a key factor for the normal operation of the equipment. ...

Examples

Embodiment Construction

[0024] The invention provides a self-absorbing hydrogel used for heat management on the surface of a heating element. The self-absorbing hydrogel refers to a hygroscopic hydrogel composed of a salt-water-resistant gel and a certain concentration of hygroscopic salt solution. The salt-resistant gel is acrylamide (AAM) hydrogel, polyacrylamide hydrogel, 4-acetylacryloyl ethyl acetate hydrogel and the like. The hygroscopic salt solution is lithium bromide solution, lithium chloride solution, calcium chloride solution and the like. The surface of the hygroscopic hydrogel is flat and smooth, and can directly cover the surface of the heating element that needs to dissipate heat. The concentration of the hygroscopic salt solution in the hygroscopic hydrogel can be adjusted to realize effective moisture absorption and refrigeration under different environments and different surface temperatures of the heating element.

[0025] The preparation method of self-absorbing hydrogel compris...