Phase change composite, preparation method and application

A phase-change composite material and powder technology, which is applied in the direction of heat exchange materials, chemical instruments and methods, reagents, etc., can solve the problem of increasing the thermal resistance of heat transfer media and phase change materials, limiting popularization and application, and reducing heat transfer efficiency, etc. problems, to achieve the effect of improving thermal management efficiency, improving heat transfer efficiency, and overcoming low thermal conductivity

Inactive Publication Date: 2019-01-18
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This increases the thermal resistance between the heat transfer medium and the phase change material, reduces the heat transfer efficiency, and increases the cost, thus limiting its popularization and application.

Method used

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  • Phase change composite, preparation method and application
  • Phase change composite, preparation method and application
  • Phase change composite, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The type of extruder used in the present invention is TSE35PLUS, with a screw diameter of 35.6mm, a screw aspect ratio of 40, and ten screw heating zones.

[0047] The specific molding method is as follows:

[0048] 1. Primary mixing

[0049] According to the weight ratio, add 60 parts of paraffin powder, 7 parts of expanded graphite powder, 25 parts of polyethylene particles, 8 parts of SEBS, and 12 parts of flame retardant into a high-speed mixer and mix at a high speed for 30 minutes at 50 ° C to obtain a mixed powder. material.

[0050] 2. Extrude once

[0051] The obtained primary mixed powder is added to the feeding barrel of the extruder. Turn on the power supply, air source and water source, and set the heating temperature of the host screw in the ten areas from the machine head to the feeding port as 120°C, 120°C, 120°C, 110°C, 110°C, 100°C, 100°C, 80°C, 60°C, 40°C; machine head temperature 120°C; start-up valve temperature 120°C; transition plate temperatu...

Embodiment 2

[0065] The weight ratio is 70 parts of paraffin wax powder, 8 parts of expanded graphite powder, 13 parts of polyethylene particles, 9 parts of SEBS, and 14 parts of flame retardant. One-time extrusion set heating temperature The temperature of the ten areas from the machine head to the feeding port is 110°C, 110°C, 110°C, 100°C, 100°C, 90°C, 90°C, 70°C, 50°C, 30°C ; head temperature 110°C; driving valve temperature 110°C; transition plate temperature 110°C; set the contact pressure of the cutter head of the underwater pelletizer to 6kg; The temperature is 140°C, 140°C, 140°C, 130°C, 130°C, 120°C, 120°C, 100°C, 80°C, 60°C; the head temperature is 140°C; the start valve temperature is 140°C; the transition plate temperature is 140°C ; Setting underwater granulator cutter head contact pressure 8kg; Other steps are with embodiment 1.

[0066] The phase-change composite material pellets obtained in this example were thermocompressed to obtain a 5mm thick sheet, and performance te...

Embodiment 3

[0068] The weight ratio is 80 parts of paraffin wax powder, 9 parts of expanded graphite powder, 6 parts of polyethylene particles, 5 parts of SEBS, and 14 parts of flame retardant.

[0069] The specific preparation steps are the same as in Example 1.

[0070] The phase-change composite material pellets obtained in this example were thermocompressed to obtain a 5mm thick sheet, and performance tests were performed on it. The specific performance is shown in Table 1.

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Abstract

The invention provides a phase change composite, a preparation method and an application. The phase change composite is prepared from paraffin powder, expanded graphite powder, polyethylene particlesand SEBS. By adopting a material system in a special ratio, the defects that the conventional phase change energy storage material is low in thermal conductivity and required to be encapsulated in practical use to prevent leakage are overcome, thermal management efficiency is increased greatly, and popularization and application range of the phase change energy storage material is expanded.

Description

technical field [0001] The invention relates to a phase-change composite material, a preparation method and its use, in particular to a phase-change composite material for battery thermal management, a preparation method and its use, and belongs to the technical field of phase-change materials. Background technique [0002] Under the harsh conditions of energy shortage, environmental pollution, and climate warming, the development of new energy vehicles is of great significance to solve energy and environmental system problems and improve the country's comprehensive capabilities. In the first half of 2016, the production and sales of new energy vehicles in my country reached 215,000 units and 207,000 units respectively, a year-on-year increase of 120% and 123% respectively. The huge mass market has been gradually opened up, and the demand for new energy vehicles will reach a blowout growth in the future. However, one of the factors hindering the development of new energy veh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/06C08L23/06C08L53/02C08K7/24B29C48/92C09K5/06
CPCC08L91/06C08L2203/20C08L2205/03C09K5/063C08L23/06C08L53/025C08K7/24Y02P20/141
Inventor 刘妍张雅倩李德里
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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