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High-latent-heat energy storage microcapsule based on reactive phase change core material and preparation method thereof

A phase-change core material and microcapsule technology, which is applied in the direction of microcapsule preparation, microsphere preparation, chemical instruments and methods, etc., can solve the problems of low density of wall material and low coating rate, achieve excellent performance and improve volatilization The effect of temperature

Pending Publication Date: 2021-12-10
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult for the above-mentioned wall materials to achieve low density and low covering rate.

Method used

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  • High-latent-heat energy storage microcapsule based on reactive phase change core material and preparation method thereof
  • High-latent-heat energy storage microcapsule based on reactive phase change core material and preparation method thereof
  • High-latent-heat energy storage microcapsule based on reactive phase change core material and preparation method thereof

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preparation example Construction

[0030] The present invention is based on the high latent heat of aliphatic amine itself, as a phase change core material and a monomer participating in the reaction, and forms a core-shell structure phase change energy storage microcapsule through interfacial polymerization reaction with isocyanate, and its preparation method includes the following steps:

[0031] Add a certain amount of fatty amine and emulsifier into a non-polar organic solvent, heat to a certain temperature and stir vigorously until a stable suspoemulsion is formed.

[0032] A certain amount of isocyanate is slowly added to the above suspoemulsion. During this process, part of the fatty amine core material and isocyanate polymerize at the oil-oil interface to form polyurea as the wall material to complete the microcapsule coating. Stir at a certain temperature for a period of time until the reaction is complete, and a white emulsion is obtained.

[0033] Pass the obtained emulsion through a spray drying dev...

Embodiment 1

[0041] The invention provides a high latent heat energy storage microcapsule based on a reactive phase change core material and a preparation method thereof, comprising the following steps:

[0042] Add 120 grams of dodecylamine and 4 grams of Span 80 emulsifier into 600 ml of petroleum ether, heat to 35 ° C, adjust the emulsifier speed to 5000 rpm, and emulsify for about 10 minutes to form a stable suspension.

[0043] Slowly add 30 grams of toluene diisocyanate into the above suspension at room temperature. During this process, part of the aliphatic amine core material and isocyanate polymerize at the interface to form polyurea as the wall material to complete the microcapsule coating. Stir at 300 rpm for 5 hours until the reaction is complete, and a white emulsion is obtained.

[0044] The above-mentioned emulsion is spray-dried at high temperature, and the spraying conditions are that the feed rate is 1L / h, the outlet pressure of the air compressor is 2 atmospheres, and th...

Embodiment 2

[0046] The invention provides a high latent heat energy storage microcapsule based on a reactive phase change core material and a preparation method thereof, comprising the following steps:

[0047] Add 100 grams of tetradecylamine and 2 grams of Tween 80 emulsifier into 350 ml of n-heptane, heat to 40 ° C, adjust the speed of the emulsifier to 3500 rpm and emulsify for about 15 minutes to form a stable suspension.

[0048]Slowly add 15 grams of toluene diisocyanate into the above suspension at room temperature. During this process, part of the aliphatic amine core material and isocyanate polymerize at the interface to form polyurea as the wall material to complete the microcapsule coating. Stir at 300 rpm for 5 hours until the reaction is complete, and a white emulsion is obtained.

[0049] The above-mentioned emulsion is spray-dried at high temperature, and the spraying conditions are that the feed rate is 1L / h, the outlet pressure of the air compressor is 2 atmospheres, and...

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Abstract

The invention discloses a high-latent-heat energy storage microcapsule based on a reaction type phase change core material and a preparation method thereof, and aims at utilizing high latent heat and reactivity of aliphatic amine, and enabling the aliphatic amine to be used as an energy storage core material and a reaction monomer to be subjected to an interface reaction with isocyanate in an oily solvent to obtain the phase change energy storage microcapsule. The microcapsule has a good energy storage effect and stability, and can be used in the application fields of textiles, energy-saving building materials, waste heat recovery, electronic heat dissipation / thermal insulation materials and the like. The preparation method comprises the following steps: (1) adding a certain amount of fatty amine and an emulsifier into a non-polar organic solvent, heating, and stirring to form a suspension; (2) slowly adding a certain amount of isocyanate into the suspension, polymerizing to form polyurea, completing microcapsule coating, and stirring for a period of time at a certain temperature until the reaction is complete; and (3) carrying out spray drying on the reacted emulsion to prepare phase change energy storage microcapsule powder.

Description

technical field [0001] The invention belongs to the field of energy materials, and in particular relates to a high latent heat energy storage microcapsule based on a reactive phase change core material and a preparation method thereof. Background technique [0002] The application of phase change microcapsules in latent heat storage systems is mainly divided into two categories: the first category is heat storage, and the second category is thermal management. Store solar energy during the day in phase change materials, and release heat at night to make up for the energy difference in different time periods; in addition, phase change materials can be used to recover waste heat in industrial sectors, and then applied to other sectors to make up for the energy gap in different spaces Poor energy. Both of the above have effectively improved the utilization rate of energy. Since the temperature during the solid-liquid phase transition is almost constant, this feature can be us...

Claims

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Application Information

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IPC IPC(8): C09K5/06B01J13/02
CPCC09K5/063B01J13/025Y02E60/14
Inventor 张国庆张朝霞周岚刘国金
Owner ZHEJIANG SCI-TECH UNIV