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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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 an...

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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.

Application Domain

Graphene

Technology Topic

Graphite oxideGroup treatment +6

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Examples

Experimental program(3)
Comparison scheme(3)
Effect test(1)

Example Embodiment

[0033]Example 1

[0034]The preparation method of high-density graphene heat film regulated by the group, including the following steps:

[0035]0.1% hydrochloric acid was added to 10 g of deionized water, and stirring was stirred using a high speed mixer to obtain a first slurry;

[0036]The oxidized graphene filter cake was referred to in 5% first slurry, and the granulated treatment was carried out using a blade pulverizer to be treated into 1 mm particles, then in the above-described first slurry, stirred at 300 rpm for 15 min, and then stirred at 1000 rpm 30 min is stirred at high speed to obtain a hydrophobic high-containing slurry;

[0037]Ultrasonic homogenizing machine is used to use ultrasonic homogeneous machine using ultrasonic homogeneous machine, with a frequency of 20 kHz, a sound intensity of 1 W / cm.2, Obtain a uniformly dispersed second slurry;

[0038]The second slurry was dispersed using a dual planet mixer, and an ammonia water having a mass of 0.1% of the slurry was added thereto, and the viscosity of the slurry was 3000 MPa • s;

[0039]The above-mentioned slurry having the viscosity is treated with a single-channel Y-type microjection homogeneity under 30 bar pressure, stirred, and the vacuum is deprived to obtain a coated slurry;

[0040]The injection molding process is used to pour the coated slurry into a rectangular model of 1 cm * 1 cm, and the resulting surface is dried over 40 ° C for 8 h at 40 ° C, and then raised to 300 ° C at 0.2 ° C / min for foaming. Get a single layer dry film;

[0041]2 layers of 10 μm dry film were selected, and the tablets were pressed under a 10PA pressure of 10 min using a tablet machine to obtain a composite dry film;

[0042]The resulting dry film was carbonized for 1000 ° C, 14H carbonization treatment and 2400 ° C, 10H graphitization treatment, and the roller was pressed to 10 μm to obtain a high density graphene thermal film.

Example Embodiment

[0043]Example 2

[0044]The preparation method of high-density graphene heat film regulated by the group, including the following steps:

[0045]10% of hydrochloric acid was added to 10 kg deionized water, and stirring was stirred using a high speed mixer to obtain a first slurry;

[0046]The oxidized graphene filter cake was referred to as 5% first slurry, and the granulated treatment was carried out using a blade pulverizer to be treated into 1 cm particles, and then it was added to the first slurry, and the mixture was stirred at 600 rpm for 5 min, and then stirred at 1500 rpm 15 min is stirred at high speed to obtain a hydrophobic high solid slurry;

[0047]Ultrasonic homogeneous treatment is used for the obtained hydrophobic high-containing slurry to use ultrasonic homogeneous machine, with a frequency of 300 kHz, a sound strength of 20W / cm.2, Obtain a uniformly dispersed second slurry;

[0048]The second slurry was dispersed using a dual planet mixer, and a pulp mass was added thereto, and the viscosity of the slurry was 300,000 MPa • s;

[0049]The above-mentioned slurry has a multi-channel Y-shaped microjection homogeneous treatment under 1000 bar pressure, stirred, and then deprived, the coating is obtained;

[0050]The injection molding process is used to pour the above-described coated slurry into a rectangular model of 40 cm * 40 cm, and the casting the resulting die is dried over 80 ° C for 12 h, then at 1 ° C / min to warm to 400 ° C for foaming, Get a single layer dry film;

[0051]A 10 layer 100 μm dry film was selected, and the tablet was pressed under a pressure of 120 min under a pressure of 100 MPa, resulting in a composite dry film;

[0052]The resulting dry film was carbonized for 1500 ° C for 14 h and 3100 ° C for 6 hhth graphitization treatment, and the roller was pressed to 200 μm to obtain a high density graphene thermal film sheet.

Example Embodiment

[0053]Example 3

[0054]The preparation method of high-density graphene heat film regulated by the group, including the following steps:

[0055]3% hydrochloric acid was added to 1 kg deionized water, and stirring was stirred using a high-speed mixer to obtain a first slurry;

[0056]The oxidized graphene filter cake was referred to as 3% first slurry solid content, and the granulened treatment was carried out using a blade pulverizer to form a 4 mm particles, and then the first slurry was added, stirred at 400 rpm for 8 min, and then stirred at 1200 rpm 20min is stirred at high speed to obtain a hydrophobic high-containing slurry;

[0057]Ultrasonic homogenizing machine is used to use ultrasonic homogeneous machine using ultrasonic homogeneous machine, frequency is 100 kHz, and the sound is 10W / cm2, Obtain a uniformly dispersed second slurry;

[0058]The second slurry was dispersed using a dual planet mixer, and an ammonia water of the slurry mass was added thereto, and the viscosity of the slurry was 80000 MPa • s;

[0059]The above-mentioned slurry has a multi-channel Z-type microjection homogeneity under 400 bar pressure, and the coating is obtained after stirring.

[0060]The injection molding process is used to pour the coated slurry into a rectangular model of 20 cm * 20 cm, and the resulting surface is dried over 60 ° C for 12 h at 60 ° C, then raised by 0.5 ° C / min to 400 ° C for foaming, Get a single layer dry film;

[0061]Select 4 floors of 50 μm dry film, using a tablet machine under 60 mPa pressure under a pressure of 60 min to obtain a composite dry film;

[0062]The resulting dry film was carbonized for 1500 ° C, 10H carbonization treatment and 3100 ° C, 2H graphitization treatment, and the roll was pressed to 160 μm to obtain a high density graphene thermal film.

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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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

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

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Description & Claims & Application Information

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