Preparation method of high-performance composite carbon felt

A composite carbon, high-performance technology, applied in the direction of carbon fiber, textiles, papermaking, fiber treatment, etc., can solve the problems of increasing the input cost of manufacturers, affecting the service life of carbon felt, and affecting the use effect of carbon felt, so as to ensure the service life, The effect of improving the stretching effect and preventing the loss of resistivity or thermal conductivity

Inactive Publication Date: 2019-12-24
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the existing carbon felt finished products, due to the impurities contained in the raw materials, the use effect of the carbon felt will be directly affected, and some carbon fibers will be broken during use, which will affect the service life of the carbon felt. If the high-purity raw material is directly used , will greatly increase the input cost of the manufacturer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The invention provides a kind of preparation method of high-performance composite carbon felt, and described specific steps are as follows:

[0033] Step 1. Raw material purification:

[0034] a: Clean the polyacrylonitrile fiber with an ultrasonic cleaner to remove impurities stuck on the outside;

[0035] b: drying the polyacrylonitrile fibers cleaned in step a at room temperature for subsequent use, and removing pollutants on the surface of the polyacrylonitrile fibers;

[0036] Step 2. Preparation of PAN precursor: In an air environment, wet-spin the clean polyacrylonitrile raw material and viscose filament obtained in Step 1 to obtain PAN precursor. The reaction time is 0.5-3h, and the PAN precursor is The color of the silk gradually changes from white to yellow and brown, and finally forms black pre-oxidized fibers;

[0037] Step 3, pre-oxidation: pre-oxidize the PAN precursor obtained in step 2, and control the temperature range at 200-300°C;

[0038] Step 4. ...

Embodiment 2

[0043] The invention provides a kind of preparation method of high-performance composite carbon felt, and described specific steps are as follows:

[0044] Step 1. Raw material purification:

[0045] a: Put the polyacrylonitrile fiber into n-butanol, control the temperature at 60-80 degrees Celsius, stir for 4-6 hours, and obtain a solution of a small amount of residue (this substance is an insoluble substance, which will affect the properties of the formed carbon fiber);

[0046]b: Under a helium environment, filter the solution in step c to remove intolerant impurities and avoid mixing with polyacrylonitrile raw materials again, and then raise the temperature to a temperature range of 120-140 degrees Celsius to obtain clean polyacrylonitrile Raw materials, n-butanol reaches the boiling point within this temperature range, and n-butanol volatilizes, leaving only clean polyacrylonitrile raw materials;

[0047] Step 2. Preparation of PAN precursor: In an air environment, wet-s...

Embodiment 3

[0054] The invention provides a kind of preparation method of high-performance composite carbon felt, and described specific steps are as follows:

[0055] Step 1. Raw material purification:

[0056] a: Clean the polyacrylonitrile fiber with an ultrasonic cleaner to remove impurities stuck on the outside;

[0057] b: Dry the polyacrylonitrile fibers cleaned in step a at room temperature and set aside to remove the pollutants on the surface of the polyacrylonitrile fibers to ensure the subsequent preparation of clean polyacrylonitrile:

[0058] c: Put the dry polyacrylonitrile fiber obtained in step b into n-butanol, control the temperature at 60-80 degrees Celsius, stir for 4-6 hours, and obtain a solution of a small amount of residue (this substance is a poorly soluble substance, which will affect the formation of carbon fibers. nature);

[0059] d: Under a helium environment, filter the solution in step c to remove intolerant impurities and avoid mixing with polyacrylonitr...

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Abstract

The invention discloses a preparation method of a high-performance composite carbon felt, and particularly relates to the technical field of fiber products. The preparation method comprises the specific steps of material cleaning, PAN (polyacrylonitrile) precursor preparation, pre-oxidation, carbonization, graphitization, surface treatment and coating treatment. According to the invention, a material cleaning step is added to the composite carbon felt process, impurities in the finished carbon felt can be effectively eliminated from the source, and the influence of the impurities upon the quality of the finished carbon felt is prevented; polyacrylonitrile is dissolved using n-butyl alcohol, the characteristics of the carbon fiber and the carbon felt of the subsequent branch are ensured accordingly, the parts of the carbon felt are stressed uniformly so that the fracture caused by uneven stress at impurity positions in the traditional process is avoided, the stretching effect of the finished carbon felt in the using process is effectively improved, and the service life of the carbon felt is ensured; volatilized n-butyl alcohol vapor can be liquefied again after being cooled for secondary use, and therefore, the production cost of a manufacturer is guaranteed.

Description

technical field [0001] The invention relates to the technical field of fiber products, more specifically, the invention relates to a preparation method of high-performance composite carbon felt. Background technique [0002] Carbon fiber is a new material with excellent mechanical properties. Its specific gravity is less than 1 / 4 of that of steel. The tensile strength of carbon fiber resin composite materials is generally above 3500Mpa, which is 7-9 times that of steel. The tensile modulus of elasticity is 23000 -43000Mpa is also higher than steel. Therefore, the specific strength of CFRP, that is, the ratio of the strength of the material to its density, can reach 2000Mpa / (g / cm 3 ) above, while the specific strength of A3 steel is only 59Mpa / (g / cm 3 ), its specific modulus is also higher than that of steel. The higher the specific strength of the material, the smaller the weight of the component, and the higher the specific modulus, the greater the stiffness of the compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/432D06M11/82D01F9/22D06M101/40
CPCD01F9/225D06M11/82D06M13/432D06M2101/40
Inventor 柴万红
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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