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Carbon fiber heating paper and preparation method thereof

A technology of carbon fiber heat generation and carbon fiber, which is applied in fiber raw material processing, synthetic cellulose/non-cellulose material pulp/paper, fiber dispersant addition, etc. Heating unevenness and other issues can be achieved to achieve more uniform heating, improved uniformity, and easy cost control

Active Publication Date: 2011-09-14
WUHAN SAIYANG INDOOR CLIMATE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The contact points between carbon fibers are completely random, and there is no contact between many carbon fibers and other fibers at all, which results in a considerable proportion of carbon fibers that cannot participate in the overall heating; in addition, the diameter of carbon fibers is very small, and the The point contact between them is often a Schottky contact, and the electrical conduction and thermal conduction efficiency of the Schottky contact are very poor.
To sum up, the random contact between carbon fibers causes some carbon fibers not to participate in heating, while the carbon fibers participating in heating tend to have relatively low thermal conductivity efficiency, resulting in low overall heating and thermal conductivity efficiency of heating paper, as well as uneven heating

Method used

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  • Carbon fiber heating paper and preparation method thereof
  • Carbon fiber heating paper and preparation method thereof
  • Carbon fiber heating paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Weigh 2 g of polyacrylonitrile-based carbon fiber and 0.02 g of graphene, immerse them in 0.01 mol / L NaOH solution for 1 hour, and then wash with pure water until the pH is neutral. After mixing with the dispersant, disperse ultrasonically for 10 minutes, and then rinse with pure water until it is neutral. After the above mixture is added to the beater for beating, it is then mixed with 8 g of pulp for beating. Sheet the mixed pulp and dry it.

[0032] In the carbon fiber paper prepared by this example, the mass percentage of polyacrylonitrile carbon fiber is 20%, graphene is 0.2%, vegetable fiber is 78%, and other components such as adhesive are 1.8%. The specific indicators are as follows: unit area weight 44 g / m 2 , Thickness of 0.12 mm, resistivity of 0.22 Ω? cm, electric power density of radiating surface is 0.92 W / cm 2 , The conversion efficiency of electric-heat radiation is 97%, and the unevenness of the radiating surface temperature is 0%.

[0033] The ...

Embodiment 2

[0034] Example 2: Weigh 2 g of polyacrylonitrile-based carbon fiber and 0.002 g of graphene, immerse them in 0.01 mol / L NaOH solution for 2 hours, then wash with pure water until the pH is neutral, and combine the solutions of the two substances with After mixing the dispersant, disperse ultrasonically for 10 minutes, and then rinse with pure water until it is neutral. After the above mixture is added to the beating machine for beating, it is then mixed with 8 g of pulp to be beaten. Sheet the mixed pulp and dry it.

[0035] In the carbon fiber paper prepared by this example, the mass percentage of polyacrylonitrile carbon fiber is 20%, graphene is 0.02%, plant fiber is 78%, and other components such as adhesive are 1.98%. The specific indicators are as follows: unit area weight 44.5 g / cm 2 , Thickness of 0.12 mm, resistivity of 0.24 Ω?cm, electric power density of radiating surface is 0.91 W / cm 2 . The electric-heat radiation conversion efficiency is 96%, and the uniformity of...

Embodiment 3

[0037] Example 3 As a comparison with no graphene added: Weigh 2 g of polyacrylonitrile-based carbon fiber, immerse it in a 0.01 mol / L NaOH solution for 1 hour, and then wash with pure water until the pH is neutral. The solution of the two substances After mixing with the dispersant, disperse ultrasonically for 10 minutes, and then rinse with pure water until it is neutral. After the above mixture is added to the beating machine for beating, it is then mixed with 8 g of pulp to be beaten. Sheet the mixed pulp and dry it.

[0038] In the carbon fiber paper prepared by this example, the mass percentage of polyacrylonitrile carbon fiber is 20%, plant fiber 78%, and other components such as adhesive 2%. The specific indicators are as follows: unit area weight 44.9 g / cm 2 , Thickness of 0.12 mm, resistivity of 0.27 Ω?cm, electric power density of radiating surface is 0.6 W / cm 2 . The electric-heat radiation conversion efficiency is 59%, and the temperature unevenness of the radiatio...

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Abstract

The invention provides a carbon fiber heating paper. The carbon fiber heating paper contains 5 to 60 percent of carbon fibers and 0.01 to 0.50 percent of graphene based on the total weight. A preparation method of the carbon fiber heating paper comprises the following steps of: mixing and pulping the graphene and the polyacrylonitrile-based carbon fibers, putting the mixture into paper pulp, beating the pulp, manufacturing paper with the pulp, and drying the paper to form the carbon fiber heating paper. The carbon fiber heating paper is applied in the field of electric heating paper; and compared with the common carbon fiber heating paper without the graphene, the heating efficiency of the carbon fiber heating paper is improved by nearly 90 percent, and the uniformity of the carbon fiber heating paper is greatly improved.

Description

Technical field [0001] The invention belongs to the field of carbon materials, and relates to a carbon fiber heating paper and a preparation method thereof. Background technique [0002] As a new type of carbon material, carbon fiber has a series of excellent characteristics such as low density, high strength, good rigidity, high temperature resistance, chemical corrosion resistance, radiation resistance, fatigue resistance, high thermal conductivity, and small thermal expansion. It has attracted much attention from the industry. Known as the fourth category of industrial materials. In application, carbon fiber is rarely used directly, and most of them are made into intermediate products or composite materials after deep processing. Carbon fiber paper is one of the deep processed products. [0003] Carbon fiber paper refers to the use of carbon fiber and other fibers (plant fiber or non-plant fiber) to add binders, surfactants and fillers, after beating, using wet papermaking, and...

Claims

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Application Information

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IPC IPC(8): D21H13/50D21H21/08
Inventor 刁炜江莉
Owner WUHAN SAIYANG INDOOR CLIMATE
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