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A high thermal conductivity flame retardant polyethylene-based composite material and its preparation method

A technology of flame-retardant polyethylene and composite materials, applied in the direction of heat exchange materials, chemical instruments and methods, plastic/resin/wax insulators, etc., can solve the problems of poor thermal conductivity and flame retardancy of polyethylene, and achieve improved flame retardancy and The effect of thermal conductivity, excellent insulation performance, and simple equipment

Active Publication Date: 2021-02-09
JIANGSU BAOYUAN GAOXIN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem of poor thermal conductivity and flame retardancy of polyethylene, and to provide a high thermal conductivity and flame-retardant polyethylene-based composite material and its preparation method

Method used

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  • A high thermal conductivity flame retardant polyethylene-based composite material and its preparation method
  • A high thermal conductivity flame retardant polyethylene-based composite material and its preparation method
  • A high thermal conductivity flame retardant polyethylene-based composite material and its preparation method

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Effect test

Embodiment 1

[0031] A method for preparing a high thermal conductivity flame-retardant polyethylene-based composite material, comprising the following steps:

[0032] S1: Weigh the Al(OH) prepared by the sol-gel method according to the mass ratio of 1:1 3 Zero-dimensional powder and the purchased BN two-dimensional sheet, that is, hexagonal boron nitride two-dimensional sheet, the two powders are placed in a mixed liquid of absolute ethanol and ionic water with a volume ratio of 1:0.75, and an ultrasonic disperser is used to Disperse and strip the mixed powder with 600W ultrasonic for 24 hours, then stir the mixed liquid with a magnetic stirrer at room temperature at a speed of 600r / min for 1 hour, and finally use a centrifuge to centrifuge at a high speed of 10000r / min for 10min, and the obtained mixed powder The body is dried and ground for use;

[0033] S2: Put the mixed powder prepared in step S1 in a beaker, then measure an appropriate amount of absolute ethanol and place it in the b...

Embodiment 2

[0039] A method for preparing a high thermal conductivity flame-retardant polyethylene-based composite material, comprising the following steps:

[0040] S1: Weigh 1.2g of Al(OH) by sol-gel method 3 Zero-dimensional powder and 1.2g of purchased BN two-dimensional tablets, the two powders were placed in a mixed liquid of 30mL of absolute ethanol and 20mL of ionic water, and the mixed powder was subjected to 600W ultrasound for 24h using an ultrasonic disperser. Disperse and peel off, then use a magnetic stirrer to stir the mixed liquid at room temperature at a speed of 600r / min for 1h, and finally use a centrifuge to centrifuge at a high speed of 10000r / min for 10min, and dry and grind the obtained mixed powder for use;

[0041]S2: Put the mixed powder prepared in step S1 in a beaker, then measure 50mL of absolute ethanol and place it in the beaker, place the beaker on a magnetic stirrer and stir evenly for a period of time, then add 0.24g of amino functional silane (KH550 ), ...

Embodiment 3

[0047] A method for preparing a high thermal conductivity flame-retardant polyethylene-based composite material, comprising the following steps:

[0048] S1: Weigh the Al(OH) prepared by the sol-gel method according to the mass ratio of 1:0.2 3 Zero-dimensional powder and the purchased BN two-dimensional sheet, that is, hexagonal boron nitride two-dimensional sheet, the two powders are placed in a mixed liquid of absolute ethanol and ionic water with a volume ratio of 1:0.75, and an ultrasonic disperser is used to Disperse and strip the mixed powder with 550W ultrasound for 20 hours, then stir the mixed liquid with a magnetic stirrer at room temperature at a speed of 600r / min for 1h, and finally use a centrifuge to centrifuge at a high speed of 8000r / min for 10min, and mix the obtained mixed powder body drying and grinding for later use, wherein the mass ratio of the two-dimensional hexagonal boron nitride sheet to deionized water is 1:4.5;

[0049] S2: Put the mixed powder p...

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Abstract

The invention discloses a high-heat-conducting and flame-retardant polyethylene-based composite material and a preparation method thereof, belongs to the field of flame-retardant cables, and aims to solve the technical problems of poor heat conductivity and flame retardance inside a material during heat accumulation of a polyethylene-based cable. The preparation method comprises the following steps: firstly, mixing aluminum hydroxide particles with hexagonal boron nitride according to a certain ratio, and performing ultrasonic dispersion; then, performing surface modification on composite powder by using silane with an amino functional group; finally, uniformly mixing the composite powder with polyethylene according to a certain ratio by an internal mixer, and performing hot-press moldingby using a flat vulcanizer to obtain the high-heat-conducting and flame-retardant polyethylene-based composite material. A synthesis technology and required equipment are simple, raw materials and intermediates are low in price, the preparation method is environmentally-friendly, pollution-free and easy to implement, and the heat-conducting and flame-retardant performance of the prepared polyethylene-based composite material is significantly improved.

Description

technical field [0001] The invention belongs to the field of electric wires and cables, and in particular relates to a high thermal conductivity flame-retardant polyethylene-based composite material and a preparation method thereof. Background technique [0002] Polyethylene (PE) has the advantages of good electrical insulation performance, small dielectric constant, small dielectric loss and excellent chemical stability, and is one of the materials widely used in wire and cable. However, the flame retardancy and thermal conductivity of polyethylene are poor, the oxygen index is only 17.4, and the thermal conductivity is only 0.3-0.5W / mK, so it is easy to burn under the influence of uneven heating or external environment, and its combustion calorific value is high. When burning, the heat release rate is high, the flame spreads fast, and it is not easy to extinguish. At the same time, the molten droplets produced by polyethylene burning may also ignite other combustibles, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08K9/00C08K9/06C08K3/22C08K7/00C09K5/14H01B3/44
CPCC08K3/22C08K7/00C08K9/00C08K9/06C08K2003/2227C08K2201/011C08L2201/02C08L2203/202C09K5/14H01B3/441C08L23/06
Inventor 迟庆国孙江波解朝辉王宣
Owner JIANGSU BAOYUAN GAOXIN ELECTRIC
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