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A low-cost, multi-functional, high-efficiency polymer-based insulating and heat-conducting composite material and its preparation method

A technology of insulating and heat-conducting composite materials, applied in the field of functional composite materials, can solve the problems of uncontrollable directional distribution area of ​​fillers, large overall performance deviation of materials, complicated processing process, etc., and achieves improved mechanical properties, good bonding condition, and operation control. handy effect

Active Publication Date: 2019-03-26
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the processing process of this method is cumbersome, and the directional distribution area of ​​the filler is not controllable, but in a random state, which makes the overall performance of the material deviate greatly and the performance is single, so it is difficult to be popularized.

Method used

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  • A low-cost, multi-functional, high-efficiency polymer-based insulating and heat-conducting composite material and its preparation method
  • A low-cost, multi-functional, high-efficiency polymer-based insulating and heat-conducting composite material and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Use high-density polyethylene (5000s, produced by Yanshan Petrochemical Co., Ltd.), with a melt index of 1g / 10min (190°C, 2.16kg); hexagonal boron nitride (RH-N, produced by Dandong Science and Technology Co., Ltd.), the main content 99%, boron trioxide ≤0.5%, moisture ≤0.5%, particle size 10μm; graphite (325 mesh, Qingdao Xingyuan Graphite Milk Co., Ltd.), particle size about 44μm. High-density polyethylene and boron nitride are mixed in a high-speed mixer at a weight ratio of 4:1, and high-density polyethylene and graphite are mixed in a high-speed mixer at a weight ratio of 3:2. Dry in a vacuum oven at 80°C for 12 hours.

[0029](2) Mix and granulate the dried mixture with a twin-screw extruder to form cylindrical premixed particles with a diameter of about 1mm and a length of about 3mm. Mixture, wherein the temperature of twin-screw feeding port, conveying section, melting section, homogenizing section and die is 155°C, 195°C, 195°C, 195°C, 190°C respectively. ...

Embodiment 2

[0033] (1) Use high-density polyethylene (5000s, produced by Yanshan Petrochemical Co., Ltd.), with a melt index of 1g / 10min (190°C, 2.16kg); hexagonal boron nitride (RH-N, produced by Dandong Science and Technology Co., Ltd.), the main content 99%, boron trioxide ≤0.5%, moisture ≤0.5%, particle size 10μm; graphite (325 mesh, Qingdao Xingyuan Graphite Milk Co., Ltd.), particle size about 44μm. High-density polyethylene and boron nitride are mixed in a high-speed mixer at a weight ratio of 4:1, and high-density polyethylene and graphite are mixed in a high-speed mixer at a weight ratio of 3:2. Dry in a vacuum oven at 80°C for 12 hours.

[0034] (2) Mix and granulate the dried mixture with a twin-screw extruder to form a cylindrical premix with a diameter of about 1mm and a length of about 3mm. The twin-screw feeding port, conveying section, melting section, and uniform The temperatures of the chemical section and the die are 155°C, 195°C, 195°C, 195°C, and 190°C, respectively....

Embodiment 3

[0038] (1) Use high-density polyethylene (5000s, produced by Yanshan Petrochemical Co., Ltd.), with a melt index of 1g / 10min (190°C, 2.16kg); hexagonal boron nitride (RH-N, produced by Dandong Science and Technology Co., Ltd.), the main content 99%, boron trioxide ≤0.5%, moisture ≤0.5%, particle size 10μm; graphite (325 mesh, Qingdao Xingyuan Graphite Milk Co., Ltd.), particle size about 44μm. High-density polyethylene and boron nitride are mixed in a high-speed mixer at a weight ratio of 4:1, and high-density polyethylene and graphite are mixed in a high-speed mixer at a weight ratio of 3:2. Dry in a vacuum oven at 80°C for 12 hours.

[0039] (2) Mix and granulate the dried mixture with a twin-screw extruder to form a cylindrical premix with a diameter of about 1mm and a length of about 3mm. The twin-screw feeding port, conveying section, melting section, and uniform The temperatures of the chemical section and the die are 155°C, 195°C, 195°C, 195°C, and 190°C, respectively....

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Abstract

The invention discloses a low-cost multifunctional high-efficiency polymer-based insulation and heat conduction composite material. The composite material has an alternately assigned special double-percolation structure formed through mutual superposition of an electricity and heat conduction layer and an insulation and heat conduction layer. An electricity and heat conduction filler has higher heat conductivity and lower price than an insulation and heat conduction filler, so compared with traditional insulation and heat conduction materials, the directionally layered-assigned composite material has the advantages of material cost reduction, integral heat conduction performance improvement, and certain antistatic and electromagnetic shielding properties due to introduction of the electricity and heat conduction layer. The low-cost multifunctional high-efficiency polymer-based insulation and heat conduction composite material has the advantages of controllable layer number and thickness, adjustable formula, excellent mechanical performances, simple production method, stable performances, and easy large-scale production, and can be widely applied to produce multifunctional high-heat conduction polymer-based plates, sheets and membranes.

Description

technical field [0001] The invention relates to a low-cost, multi-functional and high-efficiency polymer-based insulating composite material and a preparation method, belonging to the technical field of functional composite materials. Background technique [0002] With the integration, high speed and high frequency of electronic components, the phenomenon of local heat generation is particularly serious, which will not only reduce its working efficiency, but also shorten its service life exponentially. Therefore, in order to solve this problem, many scholars have devoted themselves to the development of new high-efficiency thermal conductive composite materials. Among them, polymer-based materials have attracted extensive attention due to their light weight, corrosion resistance, and low cost. In consideration of the operational safety of electronic components, high insulation requirements are put forward for thermally conductive composite materials, because when thermally ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C48/18B29C48/49C08L23/06C08K3/38C08K3/04B29C48/92
CPCB29C48/18B29C48/49B29C48/92C08K3/04C08K3/38C08K2003/385C08L23/06
Inventor 吴宏张晓朦郭少云
Owner SICHUAN UNIV
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