RU1796602C - Process for manufacturing fibrous carbon articles - Google Patents

Abstract

Usage: electrical industry, in the manufacture of carbon thermal insulation products and materials. SUMMARY OF THE INVENTION: carbon fiber material is treated with a binder containing in wt.%: Graphite colloidal solution 96-98, carbon black colloidal solution 2-4, the product is assembled and dried. Product characteristics: thermal conductivity of the material - 0.2 W / m K. Strength - 0.054-0.056 kgf / cm2. 1 tab.

Description

The invention relates to the electrical industry and can be used in the manufacture of carbon thermal insulation products and materials.

The use of colloidal graphite in the manufacture of carbon fiber-based insulating material is known. Colloidal graphite is introduced into the binder (a mixture of epoxy and phenol-formaldehyde resins) as a filler to impart antifriction properties to the material.

The disadvantage of this method is the complexity and duration of the process, the use of thermosetting resins as an impregnating substance that have a harmful effect on the human body.

As a prototype, a method for processing carbon products was selected, where a mixture of a solution of colloidal graphite and powdered is used to process carbon fiber materials

graphite and / or soot. A description of the practical implementation of the method selected for the prototype (example 1, 2) and the proposed method (example 3, 4) are given below.

The method is intended for coating carbon products. It includes a number of operations: preparing a mixture of a colloidal solution of graphite and powdered graphite, applying the mixture to the surface of the product, heat treatment and grinding. To obtain a layered product, using the method in the entire scope of protection is not possible, because after the heat treatment operation, the mixture of a colloidal solution of graphite and powdered graphite is cured and completely loses the adhesive properties. The purpose of the invention is to improve working conditions and thermal insulation properties of products.

The goal is achieved due to the fact that in the method comprising impregnation of the carbon fiber material with a carbon-containing binder, the layout

ate with

h o o o o

N3

products and heat treatment, a colloidal solution of graphite is taken as a binder, and also due to the additional introduction of a soot colloidal solution of carbon black into the colloidal solution in the following ratio, May. %:

Colloidal Graphite Solution 96-98

Soot colloidal solution 2-4

Example 1. Mixed 16 g (80 wt.%) Graphite crucible GT GOST 4596-75 and 40 g (20 wt.%) 10% aqueous colloidal solution of the brand TO-12 TU 16.538: 317-77. The resulting paste was evenly distributed over the surface of the NTM-200 TU 16.538.357-80 material plate, 100 x 100 mm in size. A second plate of NTM-200 material was laid on the surface of the mixture, onto which a graphite paste and a colloidal graphite solution were again applied. The operation was repeated 3 more times until a sample of 5 layers / plates of NTM-200 material was obtained. The resulting sample was placed in an oven heated to 100 ° C and heat treated to remove volatile components. Measured density, thermal conductivity of the obtained material, strength in the transverse direction. The measurement data are given in the table.

Example 3. The same as in example 1, but a strip of NTM-200 material coated with paste was wound onto a cylindrical metal base with a diameter of 20 mm in 8 rows.

PRI me R 3. Plates of carbon material NTM-200, size 100x100 mm, was impregnated with a binder of the following composition, wt.%:

Water colloidal

graphite solution

KM 2 Т1 brands 16538317-77 97

Water colloidal

soot solution of KRS-OTU16538317-77 3 brand

Composed a sample of 5 layers of plates and heat treated in an oven at 100 ° C. Measured density, thermal conductivity of the obtained material, strength in the transverse direction. The measurement data are given in the table,

Example 4. The same as in example 3, but an impregnated strip of NTM-200 material was wound onto a cylindrical metal base with a diameter of 20 mm in 8 rows.

PRI me R 5. The same as in example 1, but as a binder used a mixture of the following composition, wt.%:

Water colloidal.

graphite solution

brands TO-12 TU 16-538.317-77 95

Water colloidal

soot solution of KRS-OTU brand 16-538.317-775 Example. The same as in example 1, but as a binder used a mixture of the following composition, wt.%:

Water colloidal

TO-12 grade graphite solution TO 16.538.317-77 96

Water colloidal

carbon black solution

KRS-0 brands TU 16.538.317-774

PRI me R 7. The same as in example 1, but as a binder used a mixture of the following composition, wt.%:

Water colloidal

graphite solution

brands TO-12 TU 16.538.317-7798 Water colloidal

brand soot solution

KRS-OTU 16-538.317-772

PRI me R 8. The same as in example 1, but as a binder used a mixture of the following composition, wt.%:

Water colloidal

brand graphite solution

TO-12 TU 16-538.317-7799

Aqueous colloidal solution of carbon black

KRS-0 brands TU 16-538.317-77 1

PRI me R 9. The same as in example 1, but as a binder used a mixture of the following composition, wt.%: -Water colloidal ....

TO-3 grade graphite solution TU 16-538.317-7797

Water colloidal

solution of carbon black Mar Ki KRS About TU 16-538.317-773

Example 10. The same as in example 1, but as a binder used a mixture of the following composition, wt.%:

Alcohol colloidal solution of graphite grade T-12 TU 16-538.317-7797

Colloidal alcohol

brand soot solution

KRS-0 TU 16-538.317-773 PRI me R 11. The same as in example 1, but as a binder used a mixture of the following composition, wt.%:

Acetone colloidal

TO-12 grade graphite solution TU 16-538.317-77 97

Acetone colloidal

brand soot solution

KRS-0 TU 16-538.317.773

Claims (1)

The claims A method of manufacturing carbon fiber products, comprising treating a carbon fiber material with a binder containing a colloidal solution graphite, product layout and heat treatment, on the other hand and with the fact that. in order to improve working conditions and thermal insulation properties of products, a colloidal solution of soot in an amount of May 2-4 is additionally introduced into the binder. % Note. The duration of the heat treatment process “of all examples was 4 hours.