Preparation method for thermal insulation material wet-molded from short-cut carbon fiber

A short-cut carbon fiber and wet forming technology, which is applied in the field of preparing thermal insulation materials, can solve the problems of poor thermal insulation performance, high thermal conductivity, and high production cost, and achieve the effects of low cost, low thermal conductivity, and high material utilization.

Inactive Publication Date: 2017-01-18
HUNAN NANFANG BOYUN NOVEL MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, carbon-carbon insulation materials mostly use long fibers such as carbon felt, carbon cloth, and three-dimensional braids as the matrix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] The method for preparing an insulation material by wet forming chopped carbon fibers in this embodiment includes the following steps:

[0031] (1) Ingredients: chopped polyacrylonitrile-based carbon fiber (10mm length), furan resin (manufacturer: Changshu Duwei Chemical Co., Ltd., FA-2), methyl cellulose dispersant (manufacturer: Feicheng Yutian Chemical Co., Ltd. Company, high-grade product) mix evenly according to the ratio to obtain a mixture, the mass ratio of the chopped polyacrylonitrile-based carbon fiber and the furan resin = 1: 2, the methyl cellulose dispersant and the furan resin Mass ratio=1:100;

[0032] (2) Molding: The mixture processed in step (1) is put into a plate-shaped mold with holes, and the liquid in the mixture is centrifuged to obtain a molded semi-moist mixture. The semi-moist mixture is only 25% of the weight of the mixture in step (1);

[0033] (3) Curing: Put the mixture and mold treated in step (2) in a curing oven for curing....

Example Embodiment

[0038] Example 2

[0039] The method for preparing an insulation material by wet forming chopped carbon fibers in this embodiment includes the following steps:

[0040] (1) Ingredients: chopped viscose-based carbon fiber (0.1mm long), water-based epoxy resin and its curing agent (manufacturer: Shenzhen Heima Chemical Co., Ltd., model: 652, curing agent manufacturer: Shenzhen Heima Chemical Co., Ltd. , Model: 536; Dosage of 652: Dosage of 536 is 2:1), Tween dispersant (manufacturer: Wuxi Zhanwang Chemical Reagent Co., Ltd., CAS9005-65-6), mix evenly in proportion to obtain the mixture, The mass ratio of chopped viscose-based carbon fiber to the water-based epoxy resin and its curing agent=1:10, and the mass ratio of the Tween dispersant to the water-based epoxy resin and its curing agent=1:10000;

[0041] (2) Molding: The mixture processed in step (1) is put into a cylindrical mold with holes, and the liquid in the mixture is subjected to vacuum filtration and separation treatment to...

Example Embodiment

[0047] Example 3

[0048] The method for preparing an insulation material by wet forming chopped carbon fibers in this embodiment includes the following steps:

[0049] (1) Ingredients: Combine chopped pitch-based carbon fiber (1.0mm length), oily epoxy resin and its curing agent (manufacturer: Shenzhen Heima Chemical Co., Ltd., resin dosage: curing agent 2:1), fluorine Carbon surface active dispersant (manufacturer: Shanghai Jianbang Industrial Co., Ltd., FS-3100) is mixed evenly in proportion to obtain a mixture, the mass ratio of the chopped pitch-based carbon fiber to the oily epoxy resin and its curing agent = 1:6, the mass ratio of the fluorocarbon surface active dispersant to the oily epoxy resin and its curing agent=1:1000;

[0050] (2) Molding: The mixture processed in step (1) is put into a cylindrical mold with holes, and the liquid in the mixture is subjected to mechanical vibration separation treatment to obtain a molded semi-moist mixture. The semi-moist mixture is onl...

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Abstract

Provided is a thermal insulation material wet molded from short-cut carbon fiber. The thermal insulation material is prepared from the following steps: (1) ingredients: mixing by proportions evenly the short-cut carbon fiber, resin, and dispersant, to obtain the mixture; (2) molding: obtaining the molded, half moist mixture; (3) solidifying: placing the treated mixture from step (2) and the mould into a curing oven to solidify; (4) mold releasing: mold releasing the treated mixture from step (3); (5) carbonizing: carbonizing the treated mixture from step (4):(6) high-temperature purifying: purifying under high temperature the treated mixture from step (5), cooling with the oven to obtain the finished product. The thermal insulation material prepared from present method, has low heat conductivity coefficient and good thermal insulation function. The production cost is low, the preparation process is short, and the material recovery rate is high. The carbon fiber and side wastes of carbon fiber product can be recycled and used, while solving environmental problems economic benefits can be seen.

Description

technical field [0001] The invention relates to a method for preparing thermal insulation materials, in particular to a method for preparing thermal insulation materials by wet forming of chopped carbon fibers. Background technique [0002] Carbon felt is a felt-like carbonaceous material composed of carbon fibers. Carbon felt not only has the characteristics of high temperature resistance, corrosion resistance, and non-melting of general block carbon materials, but also has the properties of softness, elasticity, small volume density, and small thermal conductivity of fibrous carbon. It is an excellent thermal insulation material. Insulation materials. At present, carbon felt is widely used in the insulation components of high-temperature furnaces, high-temperature induction furnaces and vacuum coating furnaces in vacuum or non-oxidizing atmospheres. [0003] The thickness of ordinary soft carbon felt is 5-10mm. In order to make the carbon felt reach the required thicknes...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/622
CPCC04B35/83C04B35/622C04B35/62204C04B2235/48C04B2235/77C04B2235/9607
Inventor 张治军戴开瑛康志卫伍盼阳
Owner HUNAN NANFANG BOYUN NOVEL MATERIAL
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