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Preparation method of group-regulated high-density graphene heat-conducting film and obtained product

A high-density, graphene technology, applied in the field of graphene, can solve the problems of poor film performance, low density of low-solid slurry, high viscosity of high-solid slurry, etc., to achieve uniform density, large coating density, Excellent surface condition and homogeneous effect

Active Publication Date: 2021-05-14
HAIKE GRP RES INST OF INNOVATION & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a method for preparing a group-controlled high-density graphene heat conduction film and the resulting product. The method is based on effectively dispersing the slurry, and by controlling the dispersion uniformity and viscosity applicability of the slurry, the The preparation of high solid content slurry effectively solves the problems of high viscosity of high solid content slurry, low density of low solid content slurry and poor performance of finished film

Method used

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  • Preparation method of group-regulated high-density graphene heat-conducting film and obtained product

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A method for preparing a high-density graphene heat conduction film regulated by groups, comprising the following steps:

[0035] Add 0.1% hydrochloric acid to 10 g of deionized water, and use a high-speed mixer to stir and disperse to obtain the first slurry;

[0036] Weigh the graphene oxide filter cake according to the solid content of the first slurry of 5%, use a blade mill to granulate it into 1mm particles, and then add it to the above first slurry, first stir at 300rpm for 15min, then stir at 1000rpm Stir at a high speed for 30 minutes to obtain a hydrophobic high-solid slurry;

[0037] Use an ultrasonic homogenizer to perform ultrasonic homogenization treatment on the obtained hydrophobic high solid content slurry, the frequency is 20kHz, and the sound intensity is 1W / cm 2 , to obtain a uniformly dispersed second slurry;

[0038] Use a double planetary mixer to disperse and stir the second slurry, add ammonia water with a mass of 0.1% of the slurry to it, and...

Embodiment 2

[0044] A method for preparing a high-density graphene heat conduction film regulated by groups, comprising the following steps:

[0045] 10% hydrochloric acid was added to 10kg deionized water, and a high-speed mixer was used to stir and disperse to obtain the first slurry;

[0046] Weigh the graphene oxide filter cake according to the solid content of the first slurry of 5%, use a blade mill to granulate it into 1cm particles, and then add it to the above first slurry, first stir at 600rpm for 5min, then stir at 1500rpm Stir at a high speed for 15 minutes to obtain a hydrophobic high-solid slurry;

[0047] Use an ultrasonic homogenizer to perform ultrasonic homogenization treatment on the obtained hydrophobic high solid content slurry, the frequency is 300kHz, and the sound intensity is 20W / cm 2 , to obtain a uniformly dispersed second slurry;

[0048] Use a double planetary mixer to disperse and stir the second slurry, add ammonia water with a mass of 10% of the slurry to ...

Embodiment 3

[0054] A method for preparing a high-density graphene heat conduction film regulated by groups, comprising the following steps:

[0055] 3% hydrochloric acid was added to 1 kg of deionized water, and a high-speed mixer was used to stir and disperse to obtain the first slurry;

[0056] Weigh the graphene oxide filter cake according to the solid content of the first slurry of 3%, use a blade mill to granulate it into 4mm particles, and then add it to the above-mentioned first slurry, first stir at 400rpm for 8min, then stir at 1200rpm Stir at a high speed for 20 minutes to obtain a hydrophobic high-solid slurry;

[0057] Use an ultrasonic homogenizer to perform ultrasonic homogenization treatment on the obtained hydrophobic high solid content slurry, the frequency is 100kHz, and the sound intensity is 10W / cm 2 , to obtain a uniformly dispersed second slurry;

[0058] Use a double planetary mixer to disperse and stir the second slurry, add ammonia water with a mass of 4% of the...

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Abstract

The invention provides a preparation method of a group-regulated high-density graphene heat-conducting film and an obtained product, and belongs to the technical field of graphene. The method provided by the invention is based on a time separation principle (research and development of a TRIZ theory), and adopts a two-stage treatment method for treatment, namely performing group treatment on graphene oxide by using a group binder, completing effective dispersion of slurry, and performing group repair by using a modifier; the high-solid-content slurry can be prepared while the dispersion uniformity and viscosity applicability of the slurry are controlled, and the problems that the high-solid-content slurry is high in viscosity and difficult to treat, the low-solid-content slurry is low in density, and the performance of a finished product film is poor are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a method for preparing a group-controlled high-density graphene heat conduction film and a product obtained therefrom. Background technique [0002] With the multi-functionalization and miniaturization of digital devices, how to maintain the normal high-load use of the devices and efficiently dissipate heat and reduce consumption has become a hot research issue. Heat dissipation products generally have two types: passive heat dissipation and active heat dissipation. Graphene heat conduction film is a new passive heat dissipation product that has emerged in recent years. Its theoretical thermal conductivity reaches 5,300W / m K, which is the material with the highest thermal conductivity known. Due to the rapid thermal conductivity and rapid heat dissipation of graphene , making it a hot spot in the current research on heat dissipation materials. [0003] In terms of ...

Claims

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Application Information

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IPC IPC(8): C01B32/184C01B32/198C01B32/194
CPCC01B2204/24C01B32/184C01B32/194C01B32/198
Inventor 崔云龙张聪陈忠洲苗力孝丁建涛张琪张善如于鑫
Owner HAIKE GRP RES INST OF INNOVATION & TECH
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