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Flame retardant phase change microcapsule and its preparation method and use

A technology of phase change microcapsules and flame retardants, which is applied in the field of power batteries, flame retardant phase change microcapsules and their preparation, and preparation of flame retardant phase change microcapsules. Problems such as uneven distribution of enthalpy value of microcapsules

Inactive Publication Date: 2016-05-04
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used methods for preparing phase change microcapsules include interfacial polymerization, in-situ polymerization, orifice method, etc. However, most of the phase change microcapsules prepared by the above methods for battery thermal management have uneven particle size distribution. As a result, the enthalpy distribution of microcapsules with the same quality is uneven, which brings a lot of inconvenience to the estimation of the amount of phase change microcapsules in practical applications. Therefore, it is very important for phase change to solve the problem of particle size distribution of microcapsules.
[0005] Therefore, the current method for preparing phase change microcapsules still needs to be improved.

Method used

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  • Flame retardant phase change microcapsule and its preparation method and use
  • Flame retardant phase change microcapsule and its preparation method and use

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Heat 5 g of paraffin wax with a phase transition temperature of 25° C. to 50° C., add 1 g of chlorinated paraffin, 2 g of styrene, and 1 g of divinylbenzene, and mix evenly. The obtained mixed solution is called mixed solution one.

[0047] The aqueous solution of 10 g of emulsifier was added into 81 g of water, and 0.06 g of water-soluble initiator potassium persulfate was added, and the obtained mixed solution was used as mixed solution 2.

[0048] The mixed solution 1 and mixed solution 2 obtained above were injected into microchannels 1 and 2 with a microsyringe pump, and the injection flow rates were controlled to be 50 μL / min and 100 μL / min, respectively.

[0049] Receive the emulsion formed after the mixed solution 1 and 2 are mixed, raise the temperature of the emulsion to 70° C., and react for 8 hours under nitrogen to obtain the flame-retardant phase-change microcapsules.

[0050] The particle size of the obtained flame-retardant phase-change microcapsules was...

Embodiment 2

[0052] Heat 6 g of alkane mixture with 12 to 25 carbon atoms until it melts, add 0.5 g of chlorinated paraffin, 1 g of acrylate, and 0.5 g of ethylene glycol dimethacrylate, and mix evenly. The obtained mixed solution is called mixed solution 1.

[0053] The aqueous solution of 15g of emulsifier was added into 70g of water, and 0.08g of water-soluble initiator potassium persulfate was added, and the obtained mixed solution was used as mixed solution 2.

[0054] The mixed solution 1 and mixed solution 2 obtained above were injected into microchannels 1 and 2 with a microsyringe pump, and the injection flow rates were controlled to be 25 μL / min and 150 μL / min, respectively.

[0055] Receive the emulsion formed after the mixed solution 1 and 2 are mixed, raise the temperature of the emulsion to 100°C, and react under nitrogen for 10 hours to obtain the flame-retardant phase-change microcapsules.

[0056] The particle size of the obtained flame-retardant phase-change microcapsules...

Embodiment 3

[0058] Heat 4g of paraffin wax with a phase transition temperature of 25°C to 50°C, add 1.5g of chlorinated paraffin, 3g of methyl methacrylate, and 1.5g of divinylbenzene, and mix evenly. The obtained mixed solution is called mixed solution 1.

[0059] The aqueous solution of 5 g of emulsifier was added into 90 g of water, and 0.04 g of water-soluble initiator potassium persulfate was added, and the obtained mixed solution was used as mixed solution 2.

[0060] The mixed solution 1 and mixed solution 2 obtained above were injected into microchannels 1 and 2 with a microsyringe pump, and the injection flow rates were controlled to be 15 μL / min and 75 μL / min, respectively.

[0061] Receive the emulsion formed after the mixed solution 1 and 2 are mixed, raise the temperature of the emulsion to 50° C., and react under nitrogen for 6 hours to obtain the flame-retardant phase-change microcapsules.

[0062] The particle size of the obtained flame-retardant phase-change microcapsules...

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Abstract

The invention provides a flame retardant phase change microcapsule and its preparation method and use. The preparation method of the flame retardant phase change microcapsule comprises 1, mixing a phase change material, a monomer, a cross-linking agent and a fire retardant to obtain a first mixed solution, 2, dissolving an emulsifier and an initiator in water to obtain a second mixed solution, 3, mixing the first mixed solution and the second mixed solution through a micro-injection pump to obtain an emulsion and 4, carrying out a reaction process on the emulsion at a preset temperature to obtain the flame retardant phase change microcapsule. The preparation method realizes fast and effective preparation of the flame retardant phase change microcapsules with uniform particle size distribution, good monodispersity and ideal flame resistance.

Description

technical field [0001] The present invention relates to the field of preparation of new thermal management materials, in particular, to a flame-retardant phase-change microcapsule and its preparation method and application, more specifically to a method for preparing a flame-retardant phase-change microcapsule, a flame-retardant phase-change microcapsule, and a flame-retardant phase-change microcapsule containing the Power battery with flame-retardant phase-change microcapsules. Background technique [0002] Electric vehicles have become a hotspot in the research of new energy vehicles because of their environmental protection and energy saving. However, the driving range of electric vehicles is short and the safety is poor, which affects the development of electric vehicles to a certain extent. The safety of power batteries has become the main factor affecting the safety of electric vehicles. Many fire incidents of electric vehicles are related to improper thermal manageme...

Claims

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Application Information

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IPC IPC(8): C09K5/06C09K21/14B01J13/02H01M10/6569
CPCB01J13/14C09K5/06C09K21/14
Inventor 王彦红秦兴权杨重科俞会根
Owner BEIJING ELECTRIC VEHICLE
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