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Flame-retardant shaping phase-change material and preparation method thereof

A technology of shape-setting phase change material and intumescent flame retardant, which is applied in the direction of heat exchange materials, chemical instruments and methods to achieve the effect of reducing cost, overcoming large addition amount and excellent thermal conductivity

Active Publication Date: 2010-11-03
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to propose a flame-retardant shape-setting phase-change material and its preparation method to overcome that the existing phase-change materials cannot simultaneously have good shape-setting performance and flame-retardant The defects of excellent performance and high thermal conductivity expand the application field of phase change materials

Method used

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  • Flame-retardant shaping phase-change material and preparation method thereof
  • Flame-retardant shaping phase-change material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Raise the temperature of the open rubber mixing machine to 180°C, and roll and melt the high-density polyethylene accounting for 19% of the total system mass percentage, and then mix uniformly the paraffin wax accounting for 60% of the total system mass percentage, 10% ammonium polyphosphate , 5% of pentaerythritol, 5% of melamine and 1% of iron powder are gradually added to the high-density polyethylene, after the addition is completed, melt and blend for 10 minutes, take out the mixture, cool it and add it to a plastic pulverizer for crushing , and then adding the pulverized blend into a screw extruder to melt and extrude it, then granulate and shape it to obtain the flame-retardant fixed phase change material of the present invention.

[0016] Cut the flame-retardant shaped phase-change material press plate prepared in this example into a standard sample of 100mmX100mmX3mm, and test the combustion performance of the material with a cone calorimeter, and the total heat...

Embodiment 2

[0022] Open type rubber mixing machine is heated up to 185 ℃, after the high-density polyethylene that accounts for 19% of total system mass percentage is fully rolled and melted, the paraffin wax that accounts for 58% of total system mass percentage, 10% ammonium polyphosphate, 5% of pentaerythritol, 5% of melamine and 3% of iron powder are gradually added to the high-density polyethylene, and after adding, melt and blend for 10 minutes, take out the mixture, add it to a plastic pulverizer after cooling, and pulverize it. Then, the pulverized blend is put into a screw extruder to be melted and extruded, and then granulated and shaped to obtain the flame-retardant fixed phase change material of the present invention.

[0023] figure 1 It is a scanning electron microscope photograph enlarged 1000 times for the microstructure of the cross section of the product. From the scanning electron microscope photograph, it can be seen that in the microstructure of the flame retardant fi...

Embodiment 3

[0033] Open type rubber mixing machine is heated up to 185 ℃, after the high-density polyethylene that accounts for 19% of total system mass percentage is fully rolled and melted, the paraffin wax that accounts for 58% of total system mass percentage, 10% ammonium polyphosphate, 5% of pentaerythritol, 5% of melamine and 3% of zinc powder are gradually added to the high-density polyethylene, and after adding, melt and blend for 10 minutes, take out the mixture, add it to a plastic pulverizer after cooling, and pulverize it. Then, the pulverized blend is put into a screw extruder to be melted and extruded, and then granulated and shaped to obtain the flame-retardant fixed phase change material of the present invention.

[0034] Cut the flame-retardant shaped phase-change material press plate prepared above in this example into a standard sample of 100mmX100mmX3mm, and test the combustion performance of the material with a cone calorimeter, and the total heat release is 70.9MJ / m ...

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Abstract

The invention discloses a flame retardant form-stable phase-change material and a preparation method thereof. The method is characterized in that 50-60 percent (accounting for the mass percentage of the whole system) of paraffin, 15-20 percent of intumescent flame retardant, and 1-10 percent of metal powder are mixed evenly and then added into 15-20 percent (accounting for the mass percentage of the whole system) of molten high-density polyethylene; after melting and blending, the obtained mixture is melted and extruded by an extruder, and carries out granulation and molding, so as to obtain the flame retardant form-stable phase-change material in a space mesh structure which is formed by the intumescent flame retardant, the paraffin and the metal powder that dispersed in the high-densitypolyethylene evenly. As the invention adopts synergistic flame retardance of the intumescent flame retardant and the metal powder, the addition of the intumescent flame retardant is greatly reduced, the flame retardance and the thermal conductivity of the form-stable phase-change material is improved, and the popularization and application of the phase-change material in the industries of building energy-saving materials, solar energy storage materials and heat storage tempering textile materials can be greatly expanded.

Description

technical field [0001] The invention belongs to the technical field of halogen-free intumescent flame-retardant phase-change materials, in particular to a shape-setting phase-change material containing intumescent composite flame retardant and metal powder and a preparation method thereof. Background technique [0002] According to "Heat and Mass Transfer" (Heat and Mass Transfer, 32, 1997, P307), the spatial network structure formed by high-density polyethylene in the phase change material of paraffin wax and high-density polyethylene system plays a good role in encapsulating paraffin wax. Effect. However, both paraffin wax and high-density polyethylene are flammable materials, so the large-scale use of this material will bring safety hazards, and at the same time, due to the low thermal conductivity of the material, the energy utilization rate is low. "International Journal of Heat and Mass Transfer" (Inter.J.Heat and Transfer, 44, 2001, P2727) introduced a paraffin-expa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06C08L91/08C08K13/02C08K3/08C08L23/06C08K3/32C08K5/053C08K5/3492C08K5/315
Inventor 胡源张平宋磊
Owner UNIV OF SCI & TECH OF CHINA
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