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Method for preparing anisotropy heat conduction block material by Gibbs free energy induction

An anisotropic, heat-conducting block technology, applied in the direction of chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of low heat conduction efficiency of heat-conducting materials, achieve high speed, increase longitudinal thermal shock frequency, The effect of high heat transfer efficiency

Active Publication Date: 2018-11-16
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for using Gibbs free energy to induce the preparation of anisotropic heat-conducting block materials, and to solve the problem of low thermal conductivity of existing heat-conducting materials

Method used

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  • Method for preparing anisotropy heat conduction block material by Gibbs free energy induction
  • Method for preparing anisotropy heat conduction block material by Gibbs free energy induction
  • Method for preparing anisotropy heat conduction block material by Gibbs free energy induction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Take 20g of boron nitride powder as the raw material, and add 1.0g of polyvinylpyrrolidone into 300mL of N-methylpyrrolidone (NMP), and stir for 50min until completely dissolved.

[0029] (3) Take 300g of the mixed solution in step (2) and add it to the grinding equipment with balls, rods or segments as the medium, and grind for 20 hours to obtain oligolayer boron nitride with a concentration of 50mg / mL. See the attached electron transmission photo. figure 1 .

[0030] (4) Take the above 100mL boron nitride dispersion and mix it with the polymer material polypropylene, add sodium dodecylbenzenesulfonate equivalent to the dispersant grade, and stir mechanically for 30 minutes to obtain a two-dimensional nanomaterial dispersion.

[0031] (5) Using the spin centrifugal coating method, uniformly attach a layer of flat liquid film on a substrate with a diameter of 3 cm, place the substrate carrying the flat liquid film under a nitrogen system, and volatilize the solvent ...

Embodiment 2

[0034] (1) Weigh 1g of graphene powder and 1.0g of polyvinyl alcohol into 100mL of N-methylpyrrolidone, stir under ultrasonic waves for 60min until completely dispersed and dissolved.

[0035] (4) The graphene dispersion liquid of above-mentioned 100mL is mixed with macromolecular material polyethylene terephthalate, adds the hexadecyltrimethylammonium bromide of dispersant grade equivalent, mechanically stirs 30min under the ultrasonic wave to obtain two Dimensional nano material graphene dispersion.

[0036] (5) Using the spin centrifugal coating method, uniformly attach a layer of flat liquid film on a substrate with a diameter of 3 cm, place the substrate carrying the flat liquid film under a nitrogen system, and reduce the relative humidity of the solvent in the nitrogen atmosphere to 75%, The solvent in the liquid film is volatilized to gradually solidify it, thereby fixing the ordered structure inside the nano film inside the film.

[0037] (6) Stack the thin film laye...

Embodiment 3

[0039] Cut out each 1*1*0.3cm of the heat-conducting block materials prepared in Examples 1 and 2 2 , using the DZDR-R heat flow method to measure the thermal conductivity respectively, the thermal conductivity of the boron nitride-based thermally conductive block material is 5300W / (m·K), and the thermal conductivity of the graphene-based thermally conductive block material is 4900W / (m· K).

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Abstract

The invention relates to the preparation of heat conduction materials, and belongs to the field of material processing. The method for preparing an anisotropy heat conduction block material by Gibbs free energy induction is characterized in that two-dimensional nanometer materials in a two-dimensional nanometer material dispersion liquid planar liquid film are subjected to directional arrangementand are solidified into an anisotropy film; after overlapping, hot briquetting is carried out to obtain the anisotropy heat conduction block material. Internal two-dimensional nanometer particles havethe advantages of higher heat transfer efficiency and higher speed. Especially when a temperature difference is high, compared with other heat conduction materials of which the internal nanometer particles are in disordered arrangement, the heat conduction block material prepared by the method is characterized in that the lateral ineffective thermal vibration of the two-dimensional nanometer particles on a micro-level can be lowered, the longitudinal thermal vibration frequency of nanometer particles is improved, heat transfer efficiency is improved, and the heat transfer coefficient of the anisotropy heat conduction block material can be 5300W / (m.K).

Description

technical field [0001] The invention relates to the preparation of heat-conducting materials, in particular to a method for preparing anisotropic heat-conducting bulk material induced by Gibbs free energy. Background technique [0002] With the development of the information age, integrated electronic equipment has become the material basis of informatization. The integrated circuit integrates millions of logic switches within a centimeter-level space for fast calculations. The unit power density is very high, the conversion rate of electrical energy to heat energy is fast, and the integrated circuit generates a large amount of heat per unit time and heats up rapidly. If the large amount of heat energy generated inside the integrated circuit is not removed in time, its operating efficiency and service life will be greatly reduced, and it may even explode or burn out. [0003] In the prior art, heat-conducting silicon materials are often used for heat dissipation, and the he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/18B32B27/32B32B27/36B32B37/06B32B37/10C08L23/12C08L67/02C08K3/38C08K3/04C08J5/18
CPCC08J5/18B32B27/08B32B27/18B32B27/32B32B27/36B32B37/06B32B37/10B32B2307/302C08K3/042C08K2003/385C08J2367/02C08J2323/12
Inventor 滕超刘健
Owner QINGDAO UNIV OF SCI & TECH
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