Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of high thermal conductivity nylon-graphite-low melting point metal composite material and preparation method thereof

A low-melting-point metal and composite material technology, applied in the field of thermally conductive materials, can solve the problems of unproven thermal conductivity, affecting material processing performance, not mentioning thermal conductivity, etc. Effects with low equipment requirements

Active Publication Date: 2018-06-22
SOUTH CHINA UNIV OF TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention mainly relates to heat-conducting polyethylene pipes. The amount of modified heat-conducting fillers of heat-conducting polymer materials is as high as 60-90 components. Not only the amount of heat-conducting fillers is large, but also the cross-linking of cross-linkable precursors will affect the processing performance of materials. Patent There is no specific thermal conductivity data in the description
[0005] Chinese invention patent 2012104373774 discloses the production process of thermally conductive nylon material, which is composed of the following components by weight ratio, nylon: 5-70%, thermally conductive fiber: 3-45%; thermally conductive powder: 20-70%; lubricant: 2-5% %; Coupling agent: 0.2-1.0%; Other additives: 0.3-5.5%. This thermally conductive nylon material can replace metal raw materials to produce parts or shells. The heat conduction, heat dissipation function and thermal stability of the material, but the material uses a large amount of heat conduction fiber and heat conduction powder, which is likely to cause poor fluidity of the material and difficult processing. The specific thermal conductivity coefficient is not mentioned in the application document, and the heat conduction performance needs to be confirmed.

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
  • A kind of high thermal conductivity nylon-graphite-low melting point metal composite material and preparation method thereof
  • A kind of high thermal conductivity nylon-graphite-low melting point metal composite material and preparation method thereof
  • A kind of high thermal conductivity nylon-graphite-low melting point metal composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 34wt% of nylon 6, 45wt% of 20 μm flake graphite, 20wt% of tin powder, 0.5wt% of antioxidant 1076, 0.5wt% of white mineral oil were mixed in a high-speed mixer for 10 minutes at room temperature, and the mixed The raw materials are put into a twin-screw extruder to be melted and extruded and granulated. The screw temperature of the extruder is 220-270 ° C, and the main engine speed is 180 r-min. After drying, a high thermal conductivity nylon-graphite-low melting point metal composite material is obtained. After testing, its thermal conductivity is 5.364W-m K and its density is 1.795g-cm 3 . The microscopic morphology analysis of the material, such as figure 1 As shown, the thermally conductive filler is well dispersed in the nylon matrix, and the sample made of this material is tested for mechanical properties. The tensile strength is 56MPa, and the bending strength is 78MPa. The test results show that the high thermal conductivity nylon-graphite-low melting point met...

Embodiment 2

[0038] 37wt% nylon 66, 50wt% 15 μm flake graphite, 12wt% tin powder, 0.4wt% antioxidant 1010, 0.6wt% stearic acid amide were mixed at room temperature in a high-speed mixer for 5 minutes, mixed Good raw materials are melted and extruded into twin-screw extruder and granulated. The screw temperature of the extruder is 210-270°C, and the speed of the main engine is 180r-min. After drying, a high thermal conductivity nylon-graphite-low melting point metal composite material is obtained. Tested, its thermal conductivity is 3.162W-m K, density 1.695g-cm 3 . The microscopic morphology analysis of the material, such as figure 2 As shown, the thermally conductive filler is well dispersed in the nylon matrix.

Embodiment 3

[0040]50wt% nylon 66, 30wt% 30 μm dense crystalline graphite, 18wt% bismuth powder, 0.5wt% antioxidant 264, 0.5wt% antioxidant 168, 1wt% polypropylene wax at room temperature The high-speed mixer is mixed for 10 minutes, and the mixed raw materials are added to the twin-screw extruder to melt, extrude and pelletize. The screw temperature of the extruder is 220-270°C, and the main engine speed is 180r-min. Graphite-low melting point metal composites.

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
particle diameteraaaaaaaaaa
melting pointaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-thermal-conductivity nylon-graphite-low-melting-point metal composite and a preparation method thereof. The high-thermal-conductivity nylon-graphite-low-melting-point metal composite is prepared from, by weight, 20%-50% of nylon resin, 30%-60% of graphite, 5%-20% of low-melting-point metal, 0.1%-1% of antioxidant and 0.1%-1% of lubricant. The low-melting-point metal has the low melting point, the high thermal conductivity, and the low viscosity in a molten state, dispersion of filler in a matrix can be promoted through addition of the low-melting-point metal, the thermal conducting property is improved, and processing viscosity is reduced. The composite has the advantages of being high in thermal conductivity, low in density, good in mechanical and processing property, uniform in filler dispersion and the like.

Description

technical field [0001] The invention relates to a thermally conductive material, in particular to a high thermally conductive nylon-graphite-low melting point metal composite material and a preparation method thereof. Background technique [0002] With the continuous development of industrialization, the application of polymer materials in national production and life is becoming more and more extensive, and the research and development and application of polymer materials are constantly making new breakthroughs. In the field of heat conduction, although traditional heat conduction materials such as metal gold, silver, copper, aluminum, iron and other types of heat conduction materials have good heat conduction performance, the forming and processing of these materials are difficult, easy to be corroded, and expensive. More expensive and denser. The disadvantages of traditional heat conduction materials just provide opportunities for the application of polymer materials 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 Patents(China)
IPC IPC(8): C08L77/06C08L77/02C08K13/04C08K7/00C08K3/04C08K3/08C08K5/20B29C47/92B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08K3/04C08K3/08C08K5/20C08K7/00C08K13/04C08K2201/003C08L77/02C08L77/06C08L91/06C08L23/12
Inventor 何慧贾雲超
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products