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Sugar alcohol microcapsule capable of being used for phase change energy storage and preparation method thereof

A phase-change energy storage and microcapsule technology, which is applied in the direction of microcapsule preparation, microsphere preparation, chemical instruments and methods, etc., can solve the problems of poor thermal conductivity and thermal stability, poor thermal stability effect, and long time, and achieve thermal stability. Good stability and thermal conductivity, easy handling, and improved thermal conductivity

Pending Publication Date: 2020-05-05
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Capsules contain more impurities or poor thermal stability, low yield and long time
The improved existing technology can avoid the encapsulation of sugar alcohol with silicon dioxide by adding acid and alkali, so that it can well avoid the shortcomings of raw sugar alcohol as a phase change material; in addition, in engineering practical applications, improving thermal conductivity is also an important Disadvantages, poor thermal conductivity and thermal stability

Method used

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  • Sugar alcohol microcapsule capable of being used for phase change energy storage and preparation method thereof
  • Sugar alcohol microcapsule capable of being used for phase change energy storage and preparation method thereof
  • Sugar alcohol microcapsule capable of being used for phase change energy storage and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method of sugar alcohol microcapsules that can be used for phase change energy storage is made by the following steps:

[0035] (1) Prepare a saturated aqueous solution of mannitol: put 10 g of mannitol powder in a container (beaker), add 15 ml of deionized water, heat to 50° C., put it on a magnetic stirrer and stir at a speed of 800 rpm for 5 minutes to dissolve it; Place the mixed mannitol aqueous solution in an ultrasonic device with a power of 90w for 11 minutes to disperse evenly. When it appears insoluble, it becomes a saturated aqueous solution of sugar alcohol; crystallize it at room temperature 25°C, and place a magnetic stirrer after it is completely crystallized Heat and dissolve on the platform at 50°C, then place the mixed mannitol aqueous solution on an ultrasonic device with a power of 90w for 11 minutes for uniform dispersion;

[0036] (2) Preparation of aqueous phase: add 0.1 g of polysorbate 80 (Tween-80) to 15 ml of saturated DM (mannit...

Embodiment 2

[0043] A preparation method of sugar alcohol microcapsules that can be used for phase change energy storage is made by the following steps:

[0044] (1) Prepare a saturated aqueous solution of mannitol: put 8g of mannitol powder in a container (beaker), add 15ml of deionized water, heat to 40°C, and put it on a magnetic stirrer at a speed of 800rmp to stir for 8 minutes to make it To dissolve, the mixed mannitol aqueous solution can be placed in an ultrasonic device with a power of 95w for 12 minutes to disperse evenly. When it appears insoluble, it will be a saturated aqueous solution of sugar alcohol; crystallize it at room temperature 22°C, and place it again after it is completely crystallized. The magnetic stirrer platform is heated and dissolved at 40°C; then the mixed mannitol aqueous solution is placed in an ultrasonic device with a power of 95w for 12 minutes for uniform dispersion;

[0045] (2) Water phase preparation: add 0.1 g polysorbate 80 (Tween-80) to the satur...

Embodiment 3

[0052] A preparation method of sugar alcohol microcapsules that can be used for phase change energy storage is made by the following steps:

[0053] (1) Preparation of saturated aqueous solution of mannitol: put 10g of mannitol powder in a beaker, add 15ml of deionized water, heat to 60°C, and put it on a magnetic stirrer at a speed of 800rmp to stir for 11 minutes to dissolve it. Place the mixed mannitol aqueous solution in an ultrasonic device with a power of 85w for 13 minutes to disperse evenly. When it appears insoluble, it becomes a saturated aqueous solution of mannitol; crystallize it at room temperature 25°C, and place a magnetic stirrer after it is completely crystallized Heat and dissolve on the platform at 60°C, then place the mixed mannitol aqueous solution on an ultrasonic device with a power of 85w for 13 minutes for uniform dispersion;

[0054] (2) Preparation of the water phase: add 0.1 g polysorbate 80 (Tween-80) to the saturated DM (mannitol) solution, and c...

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Abstract

The invention discloses a sugar alcohol microcapsule capable of being used for phase change energy storage. The particle size of the sugar alcohol microcapsule is 140-300 nanometers. The preparation method of the sugar alcohol microcapsule capable of being used for phase change energy storage comprises the following steps: 5-6ml of 3-aminopropyltriethoxysilane (APTS) and 7-11ml of tetraethoxysilane (TEOS) are added into 15ml of a sugar alcohol saturated aqueous solution to change the coating rate and the thickness of a shell layer; then sugar alcohol phase change nanocapsules are prepared in arecrystallization manner, so that the core is subjected to multiple dissolution and crystallization processes; and meanwhile, graphene oxide is added into the water phase. The method is simple in rawmaterial, easy to operate, high in yield and low in time consumption, acid and alkali are not added into the system, and the core is prevented from being damaged. The heat stability and the heat-conducting property are better, and the defects of an original core serving as a phase change material are overcome.

Description

【Technical field】 [0001] The invention relates to the field of phase change materials, in particular to a sugar alcohol microcapsule which can be used for phase change energy storage and a preparation method thereof. 【Background technique】 [0002] In order to improve energy utilization efficiency and coordinate energy supply and demand, thermal storage of phase change materials has become an important research field; more and more attention has been paid to the application of phase change materials in electronic refrigeration, solar thermal energy storage systems and other fields. Polyol (sugar alcohol) is an important energy storage phase change material for heat storage. It has the advantages of wide melting point range, high energy density, non-corrosion, and high thermal stability, but it is easy to oxidize and crystallize. It's hard to avoid sublimation. Mannitol is a kind of sugar alcohol, its molecular formula is C 6 h 14 o 6 , with a molecular weight of 182.17, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02B01J13/04C09K5/06
CPCB01J13/02B01J13/04C09K5/063
Inventor 莫松平何利娟钟炜麟林鹏程贾莉斯陈颖
Owner GUANGDONG UNIV OF TECH