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Carbon crystal electrothermo-material and preparing method

A carbon crystal and carbon crystal powder technology, which is applied in the field of carbon crystal electric heating materials and their preparation, can solve the problems of endangering life safety, difficulty in ensuring construction quality, and risk of using carbon fiber materials at temperature, and achieves the effect of increasing surface strength

Inactive Publication Date: 2007-03-28
陆上驰 +2
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Problems solved by technology

However, although carbon fiber materials have been developed and applied in the field of civil heating for more than ten years, they have not been widely promoted. The fundamental reason is that carbon fiber materials cannot work in salt spray or humid environments. The most direct manifestation is that they are embedded in concrete. Finally, carbon fiber materials will generate a large amount of leakage current, which will endanger life safety when used
This has also led to the fact that the carbon fiber planar heating material has been unable to obtain permission to enter the construction of hidden construction projects for more than 10 years since its birth, making it lose the most mainstream market; It is difficult to ensure its construction quality; in addition, the uncertainty of the temperature of carbon fiber materials makes it a great risk to use after entering the concealed project

Method used

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  • Carbon crystal electrothermo-material and preparing method

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Experimental program
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Effect test

preparation Embodiment 1

[0044] The modulus indicators of the selected carbon fiber raw materials are: acryl cyano group, resistance 10K modulus, fiber length 3-5mm, no glue, soluble in water.

[0045] The preparation of carbon crystal powder comprises the following steps successively:

[0046] a) Soak the carbon fiber raw material in prepared thinner, which can be mixed with 35% by weight xylene, 55% acetone solution and 10% dipropylene glycol dimethyl ether solution to drive out impurities;

[0047] b) Put the above raw materials into a clean container and bake at 80°C to ensure that the thinner is completely volatilized;

[0048]c) Use a strong magnetic field above 30,000 gauss to strengthen the electrode polarity;

[0049] d) Deep processing with a high-power electronic ball mill, repeated several times, until a uniform powder body with a diameter of 1-2μ and a large mesh (about 1500 mesh) is produced to form a carbon crystal raw material.

preparation Embodiment 2

[0051] The modulus indicators of the selected carbon fiber raw materials are: acrylonitrile, resistance 10K modulus, fiber length 4-6mm, no glue, soluble in water. Carbon crystal powder is prepared according to the above method to form a carbon crystal raw material.

[0052] Carbon crystal plate preparation example 1

[0053] a) Preparation of raw materials:

[0054] 1. The above-mentioned carbon crystal powder is mixed with ordinary pulp in a ratio of 3% by weight, and the viscosity additive epoxy resin with a weight percentage of 3% of the total amount of pulp is added, and homogenized with a high-speed homogenizer;

[0055] ②. Carbon crystal paper is produced on small paper-making equipment as a raw material for making carbon crystal plates;

[0056] ③. Use the cutting equipment to cooperate with the modulus detection device to select the base paper whose carbon crystal content meets the product requirements from the large roll of carbon crystal paper, and cut it into the...

preparation Embodiment 3

[0081] The above-mentioned carbon crystal powder is mixed with ordinary pulp in a proportion of 11% by weight, and a viscosity aid epoxy resin with a weight percentage of 3% of the total amount of pulp is added, homogenized with a high-speed homogenizer, and then according to the carbon crystal plate embodiment The steps in 1 prepare the carbon crystal plate.

[0082] For the carbon crystal plate prepared by the above method, the heating time test, the surface temperature uniformity test and the surface insulation test were respectively carried out, and the obtained results are as follows:

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Abstract

This invention discloses a carbon crystal material and a method for preparing plates with the crystals, in which, the carbon crystal material is prepared by taking carbon fibers as the raw material to be grinded and modified, the plate is a panel heater prepared by mixing carbon crystal material with paper pulp and adding viscosity aid to be heated and pressed and is harmonic with concrete, which can be used as a heat collecting product.

Description

technical field [0001] The invention relates to a heating product for electric heating and its preparation technology, in particular to a carbon crystal electric heating material for civil electric heating with high weather resistance, stability and working life and a preparation method thereof. Background technique [0002] Carbon fiber has the characteristics of electrical conductivity, thermal conductivity, anti-oxidation (long-term use at 300°C), light weight, thin diameter (<7μm), small temperature coefficient of resistance, stable electrical performance, far-infrared radiation, shielding or damping electromagnetic wave interference, etc. The chopped conductive carbon fiber can be uniformly dispersed in various matrix fibers, is easy to produce on an industrial scale, and has been widely used in conductive heating materials. The planar heating element produced by carbon fiber material has the characteristics of large-area uniform heating and heat dissipation, high el...

Claims

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Application Information

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IPC IPC(8): F24D13/00D01F9/00D21H17/00
Inventor 陆上驰赖贤修朱元杰
Owner 陆上驰
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