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Strawberry-shaped thermochromic energy storage material and its preparation method and application

A technology of thermochromic and energy storage materials, which is applied in the direction of color-changing fluorescent materials, heat exchange materials, chemical instruments and methods, etc., can solve the problems of difficult energy storage of phase-change materials, and achieve improved temperature-change sensitivity and reversible discoloration , Accelerate the effect of energy absorption

Active Publication Date: 2022-02-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The fly in the ointment is that the phase change latent heat of the phase change material is certain. When the phase change material reaches the state of saturated energy storage or full energy release, the phase change material will no longer store or release energy, and the energy storage situation of the phase change material is difficult to pass. It is directly observed by the naked eye, so if a simple method can be developed to indicate the energy storage or energy release state of the phase change material, it will greatly improve the convenience of its use

Method used

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  • Strawberry-shaped thermochromic energy storage material and its preparation method and application
  • Strawberry-shaped thermochromic energy storage material and its preparation method and application
  • Strawberry-shaped thermochromic energy storage material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Mix 1g of divinylbenzene with 10g of styrene, 0.5g of acrylic acid, 1.5g of glycidyl methacrylate, 1g of polyvinylpyrrolidone and 3g of paraffin to form a mixture, then heat the mixture to 70°C, and use a homogenizer at 5500rpm After stirring at a constant speed for 30min, add 0.005g sodium dodecylbenzene sulfonate and 0.2g azobiscyanovaleric acid, then react with magnetic stirring at 700rpm for 12 hours at 70°C, centrifuge after cooling and wash repeatedly with ethanol 3 times to get pure phase change microspheres;

[0046] Mix 0.1g of crystal violet lactone with 1g of boric acid and 8g of myristyl alcohol to form a thermochromic core material mixture, then heat the mixture to 70°C and stir well to form a solution, then add 740g of deionized water, 20g of orthosilicate Ethyl ester, 5g KH550 and 0.05g alkylphenol polyoxyethylene ether, transferred to an ultrasonic instrument with a water bath temperature of 60°C for ultrasonic reaction for 3 hours, during the reaction, ...

Embodiment 2

[0049] Mix 1g of divinylbenzene with 15g of styrene, 1g of acrylic acid, 2.5g of glycidyl methacrylate, 1.5g of polyvinylpyrrolidone and 10g of paraffin to form a mixture, then heat the mixture to 75°C and use a homogenizer at 4000rpm After stirring for 15 minutes at the speed of rotation, add 0.1 g fatty acid polyoxyethylene ester and 0.3 g azobisisobutylamidine hydrochloride, then react with magnetic stirring at 800 rpm for 24 hours at 78 ° C, centrifuge after cooling and wash repeatedly with acetone for 3 Obtain pure phase change microspheres;

[0050] Mix 0.1g of phenolphthalein with 1.5g of bisphenol A and 10g of dodecanol to form a thermochromic core material mixture, then heat the mixture to 75°C and stir well to form a solution, then add 1200g of deionized water, 18g of orthosilicate Ethyl ester, 12g KH580 and 2g stearic acid were transferred to an ultrasonic instrument with a water bath temperature of 70°C for ultrasonic reaction for 4 hours. During the reaction, 0.5M...

Embodiment 3

[0053] Mix 1g of divinylbenzene with 20g of styrene, 3g of acrylic acid, 5g of glycidyl methacrylate, 3g of polyvinylpyrrolidone and 25g of paraffin to form a mixture, then heat the mixture to 85°C and use a homogenizer at a speed of 8000rpm After stirring for 30 minutes, add 0.5 g of oleic acid and 0.3 g of potassium persulfate, and then react with magnetic stirring at 1000 rpm for 36 hours at 85 ° C, centrifuge after cooling and wash repeatedly with acetone for 3 times to obtain pure phase change microspheres;

[0054] Mix 0.1g of phenol red with 5g of aromatic sulfone and 12g of stearyl alcohol to form a thermochromic core material mixture, then heat the mixture to 85°C and stir well to form a solution, then add 2000g of deionized water, 85g of orthosilicate tetra Ethyl ester, 34g KH590, 1g oleic acid and 4g stearic acid were transferred to an ultrasonic instrument with a water bath temperature of 60°C for ultrasonic reaction for 12 hours. During the reaction, 0.5M ammonia w...

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Abstract

The invention discloses a method for preparing a strawberry-shaped thermochromic energy storage material, which comprises the following steps: (1) mixing styrene, divinylbenzene, acrylic acid, glycidyl methacrylate, polyvinylpyrrolidone and paraffin, Add emulsifier and initiator, cool, and centrifuge to obtain pure phase change microspheres; (2) mix leuco dye, electron acceptor compound and solvent to form a mixture, then heat the mixture and fully stir to form a solution, Add deionized water, tetraethyl orthosilicate, silane coupling agent and emulsifier, add ammonia water to react under ultrasound, centrifuge, and dry at low temperature to obtain thermochromic silicon capsule particles; (3) phase change microspheres and heat The color-changing silicon capsules are mixed to form a mixture, an emulsifier and a catalyst are added for reaction, centrifuged and dried to obtain the strawberry-shaped thermochromic energy storage material. The strawberry-shaped thermochromic energy storage material of the present invention has the advantages of high heat enthalpy, fast temperature-sensitive response, reversible discoloration, reversible discoloration, stable properties, etc., and can be used as a new type of intelligent material in construction, energy saving, environmental protection, clothing, medical treatment and other fields have broad application prospects.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a strawberry-shaped thermochromic energy storage material and its preparation method and application. Background technique [0002] Energy storage material is a functional material that uses physical or chemical changes in the substance itself to achieve energy storage. The energy stored in it includes electrical energy, thermal energy, mechanical energy, chemical energy, etc. Among them, the storage of thermal energy is achieved by absorbing external thermal radiation. Phase change materials can store and utilize thermal energy through phase changes, which can help improve energy utilization efficiency and promote the development and use of renewable energy. The fly in the ointment is that the phase change latent heat of the phase change material is certain. When the phase change material reaches the state of saturated energy storage or full energy release, the phase change mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K9/02C09K5/06A62B17/00
CPCA62B17/003C09K5/06C09K9/02
Inventor 王潮霞张婉刘雯雯吴飞扬陈坤林殷允杰
Owner JIANGNAN UNIV
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