Coke/sulfonated graphene carbon-graphite material for sealing piece and preparation method thereof

A technology for sulfonated graphene and seals, which is applied in the field of coke/sulfonated graphene carbon and graphite materials for seals and its preparation, and can solve the problems of insufficient ability to expand micro-cracks, reduced impact resistance, compression resistance, and flexural resistance Low-level problems, to achieve the effect of alleviating thermal stress and mechanical deformation, improving sealing failure, and improving product qualification rate

Active Publication Date: 2016-09-21
窦钦宝
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of bending resistance, impact resistance and ability to reduce microcrack propagation in the service of mechanical seal carbon graphite materials of existing structures and functional materials, it often leads to the fact that such carbon graphite materials can only be reimpregnated and rebaked. It can meet the conventional physical and mechanical properties, such as low compression and bending resistance, but the bulk density is too large
With the improvement of mechanical seal requirements, traditional carbon graphite materials can no longer meet the application requirements under harsh conditions, and there is an urgent need to develop special carbon graphite materials with high strength, high air tightness, active toughening and other properties
In addition, there are few reports on the preparation of carbon-graphite materials with low density, high strength and high flexural resistance from raw material granulation modification and binder quenching and tempering

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coke/sulfonated graphene carbon-graphite material for sealing piece and preparation method thereof
  • Coke/sulfonated graphene carbon-graphite material for sealing piece and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A coke / sulfonated graphene carbon graphite material for a seal, comprising the following raw materials in mass fractions: 22% coal tar pitch, 77% coke material and 1% additive; wherein: the additive is sulfonated graphene.

[0039] Sulfonated graphene is: the dispersion in water is >20%, and the sheet diameter can reach up to 100 microns.

[0040] Coal tar pitch is mixed with high-purity pitch and modified coal pitch at a mass ratio of 4:6.

[0041] High-purity asphalt is ultra-low quinoline insoluble high-purity coal tar pitch; ultra-low quinoline insoluble high-purity coal tar pitch physical and chemical indicators: softening point 85-90 ° C, ash ≤ 500ppm, coking value ≥ 48%, toluene insoluble ≥ 18%; quinoline insoluble matter ≤ 0.05%.

[0042] The modification of coal tar pitch is as follows: sulfonated graphene and anionic surfactant are maintained in distilled water at a temperature of 172°C, sheared at a speed of 5000r / min for 1h, dispersed, and then added to the...

Embodiment 2

[0053] A coke / sulfonated graphene carbon graphite material for a seal, comprising the following raw materials in mass fraction: coal tar pitch 27.5%, coke material 72% and additive 0.5%; wherein: additive is sulfonated graphene and dispersant polystyrene A mixture of water-based resins, the mass ratio of sulfonated graphene to dispersant is 10:0.5.

[0054] Sulfonated graphene is: the dispersion in water is >20%, and the sheet diameter can reach up to 100 microns.

[0055] Coal tar pitch is mixed with high-purity pitch and modified coal pitch at a mass ratio of 5:5.

[0056] High-purity asphalt is ultra-low quinoline insoluble high-purity coal tar pitch; ultra-low quinoline insoluble high-purity coal tar pitch physical and chemical indicators: softening point 85-90 ° C, ash ≤ 500ppm, coking value ≥ 48%, toluene insoluble ≥ 18%; quinoline insoluble matter ≤ 0.05%.

[0057] The modification of coal tar pitch is as follows: sulfonated graphene and anionic surfactant are maintai...

Embodiment 3

[0068] A coke / sulfonated graphene carbon graphite material for a seal, comprising the following raw materials in mass fractions: 25% coal tar pitch, 74.5% coke material and 0.5% additive; wherein: the additive is sulfonated graphene and dispersant polystyrene A mixture of water-based resins; the mass ratio of sulfonated graphene to dispersant is 10:0.5.

[0069] Sulfonated graphene is: the dispersion in water is >20%, and the sheet diameter can reach up to 100 microns.

[0070] Coal tar pitch is mixed with high-purity pitch and modified coal pitch at a mass ratio of 6:4.

[0071] High-purity asphalt is ultra-low quinoline insoluble high-purity coal tar pitch; ultra-low quinoline insoluble high-purity coal tar pitch physical and chemical indicators: softening point 85-90 ° C, ash ≤ 500ppm, coking value ≥ 48%, toluene insoluble ≥ 18%; quinoline insoluble matter ≤ 0.05%.

[0072] The modified coal tar pitch is as follows: sulfonated graphene and anionic surfactant are maintaine...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
softening pointaaaaaaaaaa
diameteraaaaaaaaaa
flexural strengthaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the carbonaceous composite material field, and in particular, relates to a coke/sulfonated graphene carbon-graphite material for a sealing piece and a preparation method thereof. The coke/sulfonated graphene carbon-graphite material comprises the following raw materials by the mass fraction: 22-27.5% of coal pitch, 72-77.5% of a coke material and 0.5-1% of an additive, wherein the additive is sulfonated graphene or a mixture of sulfonated graphene and a dispersant. Micro cracks and defects caused by thermal stress and mechanical deformation can be effectively alleviated, the qualified rate of the product is greatly improved, and thus the sealing failure caused by insufficient strength of a pure carbon base material is improved. The invention also provides the preparation method of the material; sulfonated graphene and polystyrene water-based resin are partially chelated, and then are dispersed into a composite coke material system, and a secondary aggregate is formed and then is kneaded with the binder coal pitch to form a granulation system having relatively high dispersion degree and having relatively fixed sulfonated graphene lapped position; the problem of uneven internal stress of a blank material is solved.

Description

technical field [0001] The invention belongs to the field of carbonaceous composite materials, and in particular relates to a coke / sulfonated graphene carbon graphite material for sealing parts and a preparation method thereof. Background technique [0002] Fluid sealing components are key basic components that determine the safety and reliability of engineering machinery and equipment, and are widely used in machinery, petroleum, chemical, aerospace and other fields. Carbon graphite material has many characteristics such as self-lubrication, high thermal conductivity, low linear expansion coefficient, high heat resistance, etc., and is the most widely used matching material for mechanical seal friction pairs. The existing high-performance engineering materials (mechanical sealing carbon graphite materials) have the characteristics of high temperature resistance, corrosion resistance, good thermal conductivity, and small thermal expansion coefficient, and are widely used in ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B31/04
CPCC01P2004/03
Inventor 窦钦宝涂川俊陈良修田凯于坤
Owner 窦钦宝
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap