Composite hydrogel with synchronous evaporation heat dissipation and waste heat recovery capabilities, and preparation method and heat management method thereof

A technology of composite hydrogel and waste heat recovery, which is applied in the direction of cooling/ventilation/heating transformation, modification with liquid cooling, etc. It can solve the problems of high heat source, waste heat, waste, and inability to realize automatic water replenishment, etc., and achieve excellent heat dissipation capacity and structure simple effect

Pending Publication Date: 2020-06-26
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of high heat and waste heat waste of various heat sources, and aiming at the problem that the current hydrogel has no environmental stability and cannot realize automatic water replenishment, the present invention provides a composite gel that can realize simultaneous heat dissipation and waste heat recovery and automatic water replenishment Hydrogels for thermal management and waste heat reuse

Method used

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  • Composite hydrogel with synchronous evaporation heat dissipation and waste heat recovery capabilities, and preparation method and heat management method thereof
  • Composite hydrogel with synchronous evaporation heat dissipation and waste heat recovery capabilities, and preparation method and heat management method thereof
  • Composite hydrogel with synchronous evaporation heat dissipation and waste heat recovery capabilities, and preparation method and heat management method thereof

Examples

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preparation example Construction

[0030] The invention provides a composite hydrogel for heat management on the surface of a heat source and reuse of waste heat. The composite hydrogel with simultaneous evaporation and heat dissipation and waste heat recovery refers to polyacrylamide hydrogel with a certain concentration of hygroscopic salt and Materials composed of solutions of chemical thermoelectric materials. The hygroscopic salt is lithium bromide, lithium chloride, calcium chloride, etc., with a molar concentration of 0-17.3mol / L. The chemical thermoelectric material is potassium ferricyanide / potassium ferrocyanide or potassium ferricyanide / ammonium ferrocyanide, etc., with a molar concentration of 0-0.4mol / L. The surface of the composite hydrogel with simultaneous evaporative heat dissipation and waste heat recovery capability is smooth and smooth, and can directly cover the surface of a heat source. The concentration of the mixed solution composed of hygroscopic salts and chemical thermoelectric mater...

Embodiment 1

[0038] Provided in this example, the specific preparation method of the composite hydrogel with simultaneous evaporation and heat dissipation and waste heat recovery capabilities is as follows:

[0039] Step 1, 2M acrylamide as monomer, 0.001M N,N'-dimethylbisacrylamide as crosslinking agent, 0.002M 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylbenzene Acetone was used to prepare a mixed solution for the UV initiator.

[0040] Step 2. Pour the solution obtained in step 1 into 10×5×3.6cm 3 in the mold.

[0041] Step 3, using a UV lamp to cure for 8 hours under a nitrogen atmosphere to obtain a polyacrylamide hydrogel.

[0042] Step 4. Take out the polyacrylamide hydrogel from the mold, and place it on a heating platform at 60° C. until it is completely dry.

[0043] Step 5. Submerge the dried polyacrylamide hydrogel in a mixed solution of potassium ferricyanide / potassium ferrocyanide (0.1M) and lithium bromide (9.4M) until it swells completely.

[0044] Step 6. Take out the gel, w...

Embodiment 2

[0048] The specific preparation method of the composite hydrogel with simultaneous evaporation and heat dissipation and waste heat recovery capabilities provided in this example is as follows:

[0049] Step 1, 2M acrylamide as monomer, 0.001M N,N'-dimethylbisacrylamide as crosslinking agent, 0.002M 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylbenzene Acetone was used to prepare a mixed solution for the UV initiator.

[0050] Step 2. Pour the mixed solution obtained in step 1 into 10×6×2cm 3 in the mold.

[0051] Step 3, using a UV lamp to cure for 8 hours under a nitrogen atmosphere to obtain a polyacrylamide hydrogel.

[0052] Step 4. Take out the polyacrylamide hydrogel from the mold, and place it on a heating platform at 60° C. until it is completely dry.

[0053] Step 5. Submerge the dried polyacrylamide hydrogel in a mixed solution of potassium ferricyanide / potassium ferrocyanide (0.1M) and lithium bromide (5.4M) until it swells completely.

[0054] Step 6. Take out the gel...

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Abstract

The invention discloses a composite hydrogel with synchronous evaporation heat dissipation and waste heat recovery capabilities, and a preparation method and a heat management method thereof. The composite hydrogel is composed of a hydrogel with a cross-linked structure, a hygroscopic salt and a chemical thermoelectric solution. The preparation method comprises the following steps: preparing the hydrogel with the cross-linked structure; and heating and drying the hydrogel with the cross-linked structure, soaking the dried hydrogel in a solution formed by the hygroscopic salt and the chemical thermoelectric material, and taking out the hydrogel after the hydrogel is completely swelled to obtain the composite hydrogel with synchronous evaporation heat dissipation and waste heat recovery capabilities. The composite hydrogel can take away a large amount of heat through water evaporation at a high temperature, and meanwhile part of the heat is converted into electric energy, and the electric energy is output in a chemical thermoelectric conversion mode; and moisture in air can be absorbed at low temperature for automatic water supplement. The composite hydrogel has the characteristics of simple structure, excellent performances, convenience and intelligence, can synchronously remove waste heat and recover waste heat for a heating object, and solves the problem of waste of high-heatand low-grade heat energy.

Description

technical field [0001] The invention belongs to the field of heat dissipation and waste heat recovery, and relates to a synchronous heat dissipation and waste heat recovery technology, in particular to a composite hydrogel capable of synchronous evaporative heat dissipation and waste heat recovery, a preparation method and a heat management method. Background technique [0002] The miniaturization and integration of modern electronic devices makes the energy density of electronic devices huge when they work, and most of the energy is finally converted into heat energy, which makes the devices face the problem of excessive temperature. The bad temperature not only affects the stability of the device's work, but also brings about safety and service life problems. Therefore, solving the high temperature problem of devices is of great importance to improve the energy efficiency of devices, promote economic prosperity, energy security, and environmental protection. In addition, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L33/26C08K3/16C08K3/28C08F220/56C08F222/38C08F2/50H05K7/20
CPCC08F2/50C08F220/56C08J3/075C08J2335/00C08K3/16C08K3/28C08K2003/162H05K7/2029C08F222/385
Inventor 刘抗胡雪蛟蒲诗睿廖雨田傅佳
Owner WUHAN UNIV
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