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Flame-retarding functionalized phase-change composite material

A phase change composite material and phase change energy storage material technology, applied in the field of building materials, can solve problems such as low thermal conductivity and only 0.36-0.42 thermal conductivity, reduce building energy consumption, increase self-temperature regulation function, and improve human comfort sense of effect

Inactive Publication Date: 2017-09-15
PEKING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the patent of Publication No. CN101531885 adds metal iron powder, but the thermal conductivity of its phase-change composite material sample is only 0.36-0.42WmK, which is still low for practical applications. The thermal conductivity of the product generally needs to be higher than that of water ( 0.6W / mK)

Method used

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  • Flame-retarding functionalized phase-change composite material
  • Flame-retarding functionalized phase-change composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1. 5kg of paraffin and 0.5kg of expanded graphite were mixed at 60°C. Add the obtained material to the mixing system, add 2kg polyethylene, 0.2kg styrene-ethylene / butylene-styrene, 0.02kg copper oxide, 0.02kg stabilizer and 0.2kg ethylene vinyl acetate copolymer, at 160°C Stir slowly to combine. After mixing evenly, lower the temperature to 130°C, and slowly add 0.7kg of expandable graphite, and a mixture of 0.2kg of melamine, 0.6kg of ammonium polyphosphate, 0.5kg of pentaerythritol and 0.06kg of nano-montmorillonite in order. The functionalized phase-change composite material obtained by hot-pressing at 150°C using a pressing process can pass the flame retardant test of GB / T 11785 and GB / T 8626 standards, and when a standard sunlight is irradiated (100mW / cm 2 ) has a photothermal conversion efficiency greater than 70%, a thermal conductivity of 1.1W / mK measured by a laser thermal conductivity meter, a melting point of 20°C measured by a differential scanni...

Embodiment 2

[0033] Example 2, 5.7kg of a formulation of methyl palmitate and methyl stearate and 0.5kg of graphite were mixed at 80°C. The obtained material was slowly kneaded at 180° C. with 2 kg of high-density polyethylene, 0.3 kg of styrene-ethylene / butylene-styrene and 0.2 kg of ethylene-vinyl acetate copolymer. After mixing evenly, slowly add a mixture of 0.5kg of expandable graphite, 0.5kg of ammonium polyphosphate, and 0.3kg of melamine, and mix evenly again at 150°C. Formed at 160°C by pressing process, the obtained functionalized phase change composite material can pass the flame retardant test of GB / T 11785 and GB / T 8626 standards, under a standard sunlight irradiation (100mW / cm 2 ) has a photothermal conversion efficiency greater than 70%, a thermal conductivity of 1.4W / mK measured by a laser thermal conductivity meter, a melting point of 22°C measured by a differential scanning calorimeter, and a phase change enthalpy of 92.1kJ / kg.

Embodiment 3

[0034] Embodiment three, 4kg methyl hexadecanoate and 0.8kg expanded graphite are mixed uniformly at 80 ℃; Graphite, 0.1kg chlorinated paraffin, 0.2kg antimony trioxide and 0.3kg aluminum hydroxide were mixed in a high-speed mixer to 60°C. The functionalized phase-change composite material is obtained by extruding at 180°C. Its flame retardant test can pass GB / T 11785 and GB / T 8626 standards, under a standard sunlight irradiation (100mW / cm 2) has a photothermal conversion efficiency greater than 70%, a thermal conductivity of 1.8W / mK measured by a laser thermal conductivity meter, a melting point of 24°C measured by a differential scanning calorimeter, and a phase change enthalpy of 60.3kJ / kg.

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Abstract

The invention discloses a flame-retarding functionalized phase-change composite material which includes, by mass, 20-70% of a phase-change energy storage material, 17-55% of a support material, 3-10% of a porous material, 5-25% of a flame retarder and a synergist, 2-5% of a compatilizer, 1-5% of a heat conductive material, 3-8% of a light absorbing material, and 1-5% of other functional additives. The functionalized phase-change composite material has homogeneous texture and large latent heat, and has excellent photo-to-heat conversion capability and flame-retarding performance.

Description

technical field [0001] The invention relates to a flame-retardant functionalized phase-change composite material and its powder, granule and plate products, belonging to the field of building materials. technical background [0002] The research on the application of phase change energy storage building materials to building materials began in 1982, initiated by the Solar Energy Corporation of the US Department of Energy. Phase change energy storage building materials have the advantages of both ordinary building materials and phase change materials: they can absorb and release a large amount of heat energy; they can be used in conjunction with other traditional building materials; they are easy to install and do not require special knowledge and skills; Production; Competitive in terms of economy and benefit. [0003] Phase change materials refer to materials that can change their physical state within a certain temperature range, and use the temperature difference between...

Claims

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Application Information

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IPC IPC(8): C08L91/06C08L23/06C08L53/00C08L23/08C08L33/12C08L27/06C08L23/12C08L75/04C08K13/04C08K7/24C08K3/22C08K5/3492C08K3/32C08K5/053C08K3/34C09K5/06
CPCC08L91/06C08K2003/026C08K2003/2227C08K2003/2248C08K2003/323C08K2201/011C08K2201/014C08L23/06C08L23/12C08L27/06C08L2201/02C08L2205/03C08L2205/035C08L2207/062C09K5/063C08L53/00C08L23/0853C08K13/04C08K7/24C08K3/22C08K5/34922C08K3/32C08K5/053C08K3/346C08K3/04C08L33/12C08K3/2279C08L75/04C08K7/26C08K3/02
Inventor 邹如强赵晓娜姚锐敏
Owner PEKING UNIV
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