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Degradable high thermal conductivity composite material and preparation method thereof

A technology of composite materials and high thermal conductivity, which is applied in the field of composite materials to achieve the effects of reducing production costs, efficient thermal conductivity, and environmental friendliness

Active Publication Date: 2022-07-01
四川华造宏材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the application of chitosan in the field of thermal management has been rarely reported.

Method used

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  • Degradable high thermal conductivity composite material and preparation method thereof
  • Degradable high thermal conductivity composite material and preparation method thereof

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preparation example Construction

[0023] The preparation method of the degradable high thermal conductivity composite material of the present invention includes the following steps: adding a thermally conductive filler into water to form a uniform suspension, then adding chitosan microspheres, stirring and fully mixing, and adding acid to form a thermally conductive filler, chitosan The mixture of sugar microspheres and acidic aqueous solution, the acid dissolves part of the surface of the chitosan microspheres, and the dissolved part of the chitosan becomes the binder between the microspheres and the filler, thereby adhering the thermally conductive filler to the surface of the microspheres, Then, it is dried and formed, and the fillers are arranged in the gaps of adjacent chitosan microspheres in an orderly manner to form a thermally conductive network to obtain a degradable high thermally conductive composite material.

[0024] In the method of the present invention, the principle used is that the acidic sub...

Embodiment 1

[0033] 4 g of chitosan powder was weighed and dissolved in 100 mL of 3% (v / v) acetic acid solution, stirred and dissolved at 50° C. to prepare a 4 wt% chitosan solution, cooled and stood to discharge air bubbles in the liquid. Take 80 mL of liquid paraffin in a three-necked flask as the oil phase, add 2 mL of surfactant Span 80, stir evenly, heat up to 40°C, and add 10 mL of chitosan acetic acid solution slowly dropwise to the liquid containing Span 80 under stirring conditions In paraffin, emulsify at 40 °C for 2 hours to form a stable water-in-oil emulsion, then add a certain amount of formaldehyde solution dropwise, cross-link and solidify for 4 hours, then cool to room temperature, centrifuge the product, and discard the upper oil phase. The centrifuged product was washed three times with acetone and anhydrous ethanol, and dried under vacuum at 60°C to obtain chitosan microspheres. Add 5 g of carbon nanotubes to 100 mL of fuming nitric acid, soak for 24 hours, filter with ...

Embodiment 2

[0036] Dissolve 4 g of chitosan in 100 mL of 1% acetic acid solution, stir well until the chitosan is completely dissolved, and prepare a chitosan acetic acid solution. Take 20 mL of the prepared chitosan acetic acid solution and put it in a 50 mL centrifuge tube, slowly add 4 mL of a certain concentration of sodium tripolyphosphate solution dropwise under high-speed stirring at room temperature, and centrifuge the suspension at 10,000 r / min for 3 minutes after the reaction for 1 h, and take the supernatant. spare. The precipitate was washed three times with deionized water, and dried under vacuum at 60°C to obtain chitosan microspheres. Add 5 g of carbon nanotubes to 100 mL of fuming nitric acid, soak for 24 hours, filter with suction, and wash with a large amount of distilled water to obtain acidified modified carbon nanotubes. 1 g of treated carbon nanotubes were added to 10 mL of water to form a uniform suspension, 4 g of chitosan microspheres were added, and 0.4 mL of acet...

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Abstract

The invention belongs to the technical field of composite materials, in particular to a degradable high thermal conductivity composite material and a preparation method thereof. The technical problem to be solved by the present invention is to provide a degradable high thermal conductivity composite material and a preparation method thereof. The preparation method includes the following steps: mixing the thermally conductive filler, the chitosan microspheres and the acidic aqueous solution, and then drying and molding. The composite material of the invention can be degraded, and at the same time, the heat-conducting material is oriented and arranged in the matrix to form a heat-conducting network, and has good heat-conducting performance.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a degradable high thermal conductivity composite material and a preparation method thereof. Background technique [0002] Since dense integrated circuits will generate a large amount of heat accumulation inside, effective heat dissipation is the key to ensuring the working efficiency and service life of thermally conductive materials. Therefore, it is necessary to use a thermal interface material with excellent thermal conductivity to dissipate heat. Polymers have the advantages of low cost, good processability, and light weight, and are ideal thermally conductive materials. Unfortunately, most polymers have thermal conductivity less than 0.5 W m -1 ·K -1 , its thermal management level is at a low level. But this problem can be solved by a common strategy of adding high thermal conductivity fillers and using polymers as matrix materials. Commonly used polymer sub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L5/00C08K9/02C08K3/04C08K9/00C08K7/00C08K9/06C08K3/38C09K5/14
CPCC08K9/02C08K3/041C08K9/00C08K7/00C08K3/042C08K9/06C08K3/38C09K5/14C08K2201/011C08K2003/385C08L2201/06C08L5/00
Inventor 盖景刚邹倩熊思维姜梦影郑珂
Owner 四川华造宏材科技有限公司
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