Unlock instant, AI-driven research and patent intelligence for your innovation.

Polymer-based heat-conducting composite material and preparation method thereof

A thermally conductive composite material and polymer-based technology, which is applied in the field of polymer-based thermally conductive composite materials and their preparation, can solve the problems of insignificant improvement of thermal conductivity and increased force, and achieves enhanced thermal conductivity and reduced interface thermal resistance. Effect

Pending Publication Date: 2022-05-06
SHENZHEN INST OF ADVANCED ELECTRONICS MATERIALS +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the effective way to solve the effect of the interaction between the matrix and the filler on the thermal conductivity is to modify the surface of the filler, and graft some polymer segments to increase the force between the matrix and the filler surface and reduce the contact thermal resistance. This method of grafting polymer segments has no obvious effect on improving the thermal conductivity

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
  • Polymer-based heat-conducting composite material and preparation method thereof
  • Polymer-based heat-conducting composite material and preparation method thereof
  • Polymer-based heat-conducting composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Synthesis of silver-coated aluminum powder: adjust the pH of 200ml of pure water to about 10.60 with ammonia water, add 1.5g of aluminum powder (particle size 15-18μm) to it, and add 0.18g of polyvinylpyrrolidone, stir for 10min and take it out Filter and vacuum dry, then put into 200ml pure water containing 2.15g sodium potassium tartrate, 1.8g disodium ethylenediaminetetraacetate, 1g anhydrous copper sulfate and 0.0024g 2,2'-bipyridine, stir and filter under vacuum Dry, then add the obtained powder to 150ml pure water containing 1.4g potassium sodium tartrate, use ammonia water to adjust the silver ammonia solution containing 2.267g silver nitrate and add it to the above reaction system, stir evenly, filter and vacuum dry to obtain Silver clad aluminum powder.

[0045] (2) The mass ratio of the silver-coated aluminum powder with a particle size of 20-21 microns prepared in the fixing step (1) to lipoic acid and cross-linking agent is 70:20.3:9.7. Add 1.5g of lipo...

Embodiment 2

[0048]Except that the mass ratio of the 20-21 micron silver-coated aluminum powder prepared in step (2) to lipoic acid and crosslinking agent was changed to 50:33.8:16.2, the rest were the same as in Example 1. Add 1.5g of lipoic acid into a small glass bottle, heat it in a water bath at 180°C, and wait for it to dissolve. After dissolving, add 0.72g of polyethylene glycol diacrylate-10000 and 0.004g of anhydrous aluminum chloride, at 150°C, 200r / min , after stirring for 5 minutes, add 2.22g of silver-coated aluminum powder, at 150°C, 200r / min, stir for 15 minutes, pour it into a mold and keep it warm for 2 hours. The product is named TIM-50%.

Embodiment 3

[0050] Except that the mass ratio of silver-coated aluminum powder with a particle size of 20-21 microns prepared in step (2) to lipoic acid and crosslinking agent was changed to 30:47.4:22.6, the rest were the same as in Example 1. Add 1.5g of lipoic acid into a small glass bottle, heat it in a water bath at 180°C, and wait for it to dissolve. After dissolving, add 0.72g of polyethylene glycol diacrylate-10000 and 0.004g of anhydrous aluminum chloride, at 150°C, 200r / min , after stirring for 5 minutes, add 1.24g of silver-coated aluminum powder, at 150°C, 200r / min, stir for 15 minutes, pour it into a mold and keep it warm for 2 hours. The product is named TIM-30%.

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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of interface materials in a supramolecular structure technology, and particularly discloses a polymer-based heat-conducting composite material and a preparation method thereof. The polymer-based heat-conducting composite material is prepared from the following raw materials: lipoic acid and / or derivatives thereof, a cross-linking agent, silver-coated aluminum powder and metal salt. The preparation method comprises the following steps: heating and dissolving lipoic acid and / or a derivative thereof, adding a cross-linking agent and metal salt, stirring for the first time, adding silver-coated aluminum powder, and stirring for the second time to obtain a mixed product; and preserving heat of the obtained mixed product to obtain the polymer-based heat-conducting composite filler. According to the in-situ interface enhancement method based on Ag-s coordination reaction induction, a thin silver layer is plated on an original filler, so that the filler reacts with an active sulfur terminal in a lipoic acid matrix to form firm silver-sulfur bond coordination, the interface thermal resistance can be reduced, and the purpose of enhancing the thermal conductivity is achieved.

Description

technical field [0001] The invention belongs to the technical field of supramolecular structures, specifically relates to the technical field of interface materials, in particular to a polymer-based heat-conducting composite material and a preparation method thereof. Background technique [0002] With the development of modern science and technology, people are more pursuing electronic and electrical equipment that is easy to carry and operate. Most electronic and electrical equipment are constantly developing towards miniaturization. If it cannot be delivered, it will seriously affect the service life of the equipment. Polymer-based thermally conductive composite materials can dissipate the heat generated by electronic components during work, and have the advantages of easy processing, light weight, and good chemical stability, and play a pivotal role in the field of microelectronic devices. However, the polymer matrix itself has very low thermal conductivity (TC) (0.1–0.5...

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): C08L71/02C08K3/08C08K9/02C08K5/45C08K3/16
CPCC08K3/08C08K9/02C08K5/45C08K3/16C08K2003/0806C08K2003/164C08L71/02
Inventor 曾小亮何冬逸王振宇任琳琳胡煜琦艾代锋何斌
Owner SHENZHEN INST OF ADVANCED ELECTRONICS MATERIALS