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

Method used

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

Examples

Experimental program
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Effect test

Example Embodiment

[0032] Example 1: Mix 5 kg of paraffin wax and 0.5 kg of expanded graphite at 60°C. Add the obtained materials into 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, and put it at 160℃ Stir slowly to mix. After the mixing is uniform, the temperature is reduced to 130°C, and 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 are slowly added in order. The functionalized phase change composite material obtained by hot pressing at 150°C using the pressing process can pass the GB / T 11785 and GB / T 8626 standards in the flame retardant test. When a standard sunlight is irradiated (100mW / cm 2 The photothermal conversion efficiency of) is greater than 70%, the thermal conductivity measured by the laser thermal conductivity meter is 1.1W / mK, the melting point measured...

Example Embodiment

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

Example Embodiment

[0034] Example 3: Mix 4kg of methyl palmitate and 0.8kg of expanded graphite uniformly at 80°C; combine the obtained material with 2.4kg of polyvinyl chloride, 1kg of methyl methacrylate and styrene copolymer, and 0.8kg of expandable graphite Graphite, 0.1kg of chlorinated paraffin, 0.2kg of antimony trioxide and 0.3kg of aluminum hydroxide are mixed in a high-speed mixer to 60°C. The extrusion process is used to form at 180°C to obtain a functional phase change composite material. Its flame retardant test can pass GB / T 11785 and GB / T 8626 standards, when a standard sunlight (100mW / cm 2 The light-to-heat conversion efficiency of) is greater than 70%, the thermal conductivity measured by the laser thermal conductivity meter is 1.8W / mK, the melting point measured by the differential scanning calorimeter is 24°C, and the phase transition enthalpy is 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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