High-enthalpy-value flame-retardant phase-change material and preparation method thereof

A phase change material, high enthalpy technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of fire risk of electronic components, low enthalpy value of phase change materials, and only high flame retardancy, so as to avoid The effect of reducing enthalpy, improving heat storage and temperature control ability, and improving reliability

Pending Publication Date: 2020-12-04
SHENZHEN FRD SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current phase change material has a low enthalpy value, and its flame retardant performance only reaches the UL-94HB level. The flame retardant grade is low, and there is a certain fire risk when used in the thermal management of electronic components.

Method used

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  • High-enthalpy-value flame-retardant phase-change material and preparation method thereof
  • High-enthalpy-value flame-retardant phase-change material and preparation method thereof

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preparation example Construction

[0037] The preparation method of the high enthalpy flame retardant phase change material of the present invention may comprise the following steps:

[0038] S1. Perform surface treatment on the phase change microcapsules to eliminate easily reactive groups on the surface of the shell material.

[0039] Surface treatment of phase-change microcapsules includes: mixing and stirring silane coupling agent, water, ethanol, and ammonia water to obtain a mixed solution, mixing the mixed solution into phase-change microcapsule powder in proportion, and drying to obtain surface-treated phase-change microcapsules .

[0040] Specifically, stir silane coupling agent water, ethanol, and ammonia water in a flask at 300 rpm for 1 h to obtain a hydrolyzed silane coupling agent mixed solution, and the mass ratio of silane coupling agent, water, ethanol, and ammonia water is 1:1:1 :0.05. Then mix the mixed liquid into the phase-change microcapsule powder in proportion (silane coupling agent ma...

Embodiment 1

[0052] The raw materials are mixed with an open mill, the roll temperature is 40°C, the open mill time is 20min, and the eccentric roll distance is 0.2-0.8mm. After discharge, press film vulcanization in a flat vulcanizer, the vulcanization temperature is 120°C, the vulcanization time is 30min, and the pressure is 5MPa. The specific formula and properties are shown in Table 1.

Embodiment 2

[0054] The raw materials are mixed with an internal mixer, the mixing temperature is 40° C., the mixing time is 2 hours, the top cover is not pressed down, and the rotor speed is 30 rpm. Molded after discharging, cured at 85°C, curing time 2h, normal pressure. The specific formula and properties are shown in Table 2.

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Abstract

The invention discloses a high-enthalpy-value flame-retardant phase-change material and a preparation method thereof. The high-enthalpy-value flame-retardant phase-change material is prepared from thefollowing raw materials in parts by mass: 25-55 parts of a base material, 45-70 parts of phase-change microcapsules subjected to surface treatment and 10-55 parts of a flame retardant, wherein the base material comprises one or more of ethylene propylene diene monomer, phosphorus-containing epoxy resin and addition type silica gel; the enthalpy value of the high-enthalpy-value flame-retardant phase change material is higher than 100 J / g. The flame-retardant phase-change material disclosed by the invention realizes unification of flame retardance and high enthalpy value, not only improves thesafety of the phase-change material, but also improves the heat storage and temperature control capacity of the phase-change material, is particularly suitable for heat management of application scenes such as high-power charging, high-heat-flux chips and high-density battery packs, ensures that a device has no local overheating area, and the stability and reliability of a product is increased.

Description

technical field [0001] The invention relates to the technical field of flame-retardant phase-change materials, in particular to a high-enthalpy flame-retardant phase-change material and a preparation method thereof. Background technique [0002] With the continuous improvement of people's requirements for the integration and performance of portable electronic devices, the operating temperature of the system is expected to continue to increase, which will eventually lead to the decline of the functionality and reliability of electronic components. In the electronics industry, the thermal management of electronic components is getting more and more attention. As the heat flux of chips, batteries and other devices increases during the working or charging process, the heat dissipation problem of the device itself is gradually highlighted, and it has become a bottleneck for further performance improvement. In addition, almost all current mobile phone or automotive applications r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L91/06C08K13/04C08K3/32C08K7/00C08L63/00C08L83/05C08L83/07C08K13/06C08K9/10C08K7/24C09K5/06C09K21/14
CPCC08L23/16C08L63/00C08L83/04C09K5/063C09K21/14C08L2203/20C08L2201/02C08L2205/025C08L2205/03C08K2003/323C08L91/06C08K13/04C08K3/32C08K7/00C08K13/06C08K9/10C08K7/24
Inventor 李朋飞
Owner SHENZHEN FRD SCI & TECH
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