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Novel shaped phase-change material and preparation method thereof

A phase change material, a new type of technology, applied in the direction of microsphere preparation, heat exchange materials, chemical instruments and methods, etc., can solve the problems of reducing the phase change enthalpy of phase change materials, affecting the heat storage performance of phase change materials, etc., to achieve compensation Flammability, broaden applications, and improve the effect of flame retardancy

Active Publication Date: 2014-04-23
江苏丰彩建材(集团)有限公司 +2
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  • Abstract
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Problems solved by technology

[0003] The search found that Chinese patent ZL200810196742.0 discloses a flame-retardant shaped phase change material and its preparation method. The method is to prepare a shaped box-changed material with high-density polyethylene as a carrier by adding a flame retardant (chlorinated paraffin). The Chinese patent application discloses a preparation and application method of high thermal conductivity flame-retardant phase-change microcapsules. This method also prepares flame-retardant phase-change microcapsules by adding a flame retardant (chlorinated paraffin), but both methods are The flame retardant is directly mixed with the phase change matrix material. The flame retardant is an externally added flame retardant and can be directly mixed with the phase change material to reduce the phase change enthalpy of the phase change material, thereby affecting the heat storage of the phase change material performance

Method used

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  • Novel shaped phase-change material and preparation method thereof

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Effect test

Embodiment 1

[0025] Weigh 9g of butanediol, 4g of cyclohexane, 0.20g of butyl titanate and 0.12g of hydroquinone, put them into the reaction kettle, stir evenly, at 65°C at a rate of 0.2 drops / second After slowly adding 8.6g of methacrylic acid dropwise, the temperature was raised to 85°C for 6 hours, and then the temperature was lowered to below 40°C, and the mixture was obtained by distillation under reduced pressure. The mixture was stirred at a speed of 1500r / min and 7g of phosphorus pentoxide was divided into Add 3 to 5 times, react at 75°C for 6 hours, add 2 g of deionized water dropwise at a rate of 0.3 drops / second, raise the temperature to 110°C, and react for 2 hours to obtain a phosphate functional monomer.

[0026] Add 6g of methacrylic acid, 4g of phosphate ester functional monomer, 0.025g of dibenzoyl peroxide and 20g of paraffin into the vessel, stir and mix and ultrasonically disperse for 60 seconds to obtain an oil phase. At the same time, 150 g of deionized water and 0.5 ...

Embodiment 2

[0029] Weigh 4.5g of butanediol, 6g of benzene, 0.125g of concentrated sulfuric acid and 0.23g of tert-butylcatechol into the reaction kettle, stir well and slowly add 4.3g of methyl For acrylic acid, heat up to 60°C and react for 8 hours, then cool down to below 40°C, distill under reduced pressure to obtain the mixture, stir the mixture at a speed of 1700r / min and add 5g of phosphorus pentoxide in 3 to 5 times. After reacting at 50°C for 8 hours, 1 g of deionized water was added dropwise at a rate of 0.5 drops / second, the temperature was raised to 90°C, and the phosphate ester functional monomer was obtained after reacting for 3 hours.

[0030] Add 16g of acrylic acid and methyl methacrylate mixture (the ratio of the two is 1:1), 14g of phosphate functional monomer, 0.01g of azobisisobutyronitrile and 30g of capric acid into the vessel, stir to mix and ultrasonically disperse for 120s An oily phase is obtained. At the same time, 100 g of deionized water and 0.2 g of sodium ...

Embodiment 3

[0033]Weigh 10g of butanediol, 8g of petroleum ether, 0.165g of thionyl chloride and 0.4g of m-dinitrobenzene into the reaction kettle, stir evenly, and slowly drop 10g of formazan at a rate of 1 drop / second at 75°C. Base acrylic acid, heat up to 75°C and react for 6.5 hours, then cool down to below 40°C, and distill under reduced pressure to obtain the mixture. Stir the mixture at a speed of 1500r / min and add 10g of phosphorus pentoxide in 3 to 5 times, react at 65°C for 5 hours, add 3g of deionized water, raise the temperature to 100°C, and react for 1.5 hours Finally, the phosphate functional monomer is obtained.

[0034] Add 12g of a mixture of methacrylic acid, ethyl methacrylate and hydroxyethyl methacrylate (the ratio of the three is 2:1:1), 8g of phosphate functional monomer, 0.04g of ammonium persulfate and 50g of lauric acid into the vessel , the oil phase was obtained after stirring and ultrasonic dispersion for 180 seconds. Stir and mix 130 g of deionized water a...

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Abstract

The invention relates to a novel shaped phase-change material and a preparation method thereof. The novel shaped phase-change material is prepared from the following raw materials in parts by weight: 1-10 parts of acrylic monomers, 1-10 parts of phosphate ester functional monomer, 0.005-0.03 parts of initiator, 10-40 parts of organic phase-change materials, 50-90 parts of deionized water and 0.1-1 part of emulsifier. The novel shaped phase-change material is excellent in performance, safe and environment-friendly, not only can play good fire retardation by modification on a capsule wall through phosphate, but also compensates the defects of inflammable performance of the organic phase-change material, as a phosphate ester group is led to the capsule wall, the flame retardant property of the phase-change material is greatly improved, application of the phase-change material in the energy-saving field is expanded, direct mixing of the fire retardant and a phase-change master batch also can be avoided, high phase-change enthalpy of the phase-change material is ensured, and negative effects caused by the heat storage performance of the phase-change material is avoided.

Description

technical field [0001] The invention relates to a novel shaped phase-change material and a preparation method thereof, belonging to the technical field of building energy-saving materials. Background technique [0002] Phase change materials can store or release a large amount of heat during the phase change process and keep the phase change temperature relatively stable. It is an energy-saving material that can be widely used in the fields of heat storage and temperature control, especially in the field of building energy conservation. application. Phase change microcapsules are composite phase change materials with a core-shell structure formed by coating a layer of stable film on the surface of solid-liquid phase change material particles using microcapsule technology. In this way, the phase change materials can not only Improving the stability of the phase change material can also reduce the reaction between the phase change material and the external environment and inc...

Claims

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Application Information

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IPC IPC(8): C09K5/06B01J13/16
Inventor 朱灿银朱殿奎沈志明李晴李文李娟李安宁
Owner 江苏丰彩建材(集团)有限公司
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