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Method for quickly preparing nano-cellulose reinforced graphite material

A technology of nanocellulose and graphite materials, which is applied in the field of rapid preparation of nanocellulose reinforced graphite materials, can solve the problems of long process time, high price and high heating temperature, and achieves good mechanical properties and obvious strengthening and toughening effect. , the effect of high product quality

Inactive Publication Date: 2019-10-25
苏州山人纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the more mature materials on the market are carbon fiber reinforced carbon-carbon composite materials, which are generally prepared by chemical vapor deposition. The process takes a long time, the heating temperature is high, and the energy consumption is huge, resulting in high production costs and high prices.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] This example shows a rapid preparation method of nanocellulose reinforced graphite material, the specific steps are as follows:

[0023] (1) Weigh 50 grams of nanocellulose, disperse in 200 ml of 30% ethanol aqueous solution and perform ultrasonic oscillation;

[0024] (2) Weigh 100 grams of high-purity graphite powder with a particle size of about 1 micron and add it to the solution described in step 1 to continue ultrasonic oscillation for about 10 minutes, and a black slurry is gradually formed in the container;

[0025] (3) After taking out the container, quickly pour the slurry into a Buchner funnel with an inner diameter of 80 mm for vacuum filtration. After the suction filtration is completed, take it out carefully to obtain a filter cake with a thickness of about 30 mm;

[0026] (4) Put the filter cake into a vacuum oven with a vacuum degree of 1000Pa and a temperature of 60°C for 2 hours;

[0027] (5) Put the raw material obtained in step 4 into a cylindrical ...

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Abstract

The invention discloses a method for quickly preparing a nano-cellulose reinforced graphite material. The method comprise the following specific steps: 1) dispersing nano-cellulose in an ethanol aqueous solution, then adding high-purity ultra-fine graphite powder, and placing the mixture into an ultrasonic water bath for ultrasonic oscillation mixing to obtain precursor slurry; 2) pouring the precursor slurry into a Brinell funnel, and carrying out suction filtration to obtain a filter cake; 3) carrying out vacuum drying on the filter cake to prepare a blank body; 4) placing the raw material blank body into a graphite mold, placing the graphite mold in a direct current hot press sintering device, applying pressure and direct current voltage on two sides by electrodes, controlling the current to obtain an appropriate reaction temperature, and completing a reaction; and 5) carrying out cooling to obtain the nano-cellulose reinforced graphite material.

Description

technical field [0001] The invention relates to graphite material preparation technology, specifically, it shows a rapid preparation method of nanocellulose-reinforced graphite material. Background technique [0002] Carbon matrix composites reinforced by solid fibers and their fabrics have low density (<2.0g / cm 3 ), high strength, high specific modulus, high thermal conductivity, low expansion coefficient, good friction performance, good thermal shock resistance, and high dimensional stability. The temperature is as high as 2600°C, so it is considered to be one of the most promising high-temperature materials. Due to its unique properties, fiber-reinforced graphite composite materials have been widely used in aerospace, automobile industry, medicine and other fields, such as rocket engine nozzles and their throat linings, space shuttle end caps and thermal protection of wing leading edges systems, aircraft brake discs, etc. At present, the more mature materials on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/622
CPCC04B35/83C04B35/622C04B2235/425C04B2235/5212
Inventor 周晖雨贾建平
Owner 苏州山人纳米科技有限公司
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