Low-temperature phase-change thermal storage microcapsule as well as preparation method and application thereof

A low-temperature phase change and microcapsule technology, applied in the field of materials, can solve the problems of few nanocapsules, complex equipment, high operation requirements, etc., and achieve the effect of good encapsulation, good coating and simple process

Active Publication Date: 2015-05-13
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent (CN 102407088A) relates to the preparation method of phase change energy storage microcapsules, which adopts the fusion coaxial electrospray process to prepare microcapsules, the equipment is complex, the operation requirements are high, and the particle size of the prepared microcapsules is also greater than 5 μm
[0005] The particle size of phase change microcapsules currently prepared is generally from one to tens of microns, while nanocapsules below one micron are still relatively rare.

Method used

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  • Low-temperature phase-change thermal storage microcapsule as well as preparation method and application thereof
  • Low-temperature phase-change thermal storage microcapsule as well as preparation method and application thereof
  • Low-temperature phase-change thermal storage microcapsule as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Add 100g (100mL) deionized water in a beaker, add dropwise hydrochloric acid to adjust its pH value to 2.18, then add 0.2g (4% of n-octadecane mass) sodium dodecylbenzenesulfonate, stir to make After dissolving it, add 5.0 g of n-octadecane (the mass ratio of water to water is 1:20), stir and mix evenly to obtain an oil-in-water mixed liquid.

[0036]2) Place the beaker in a water bath at 80°C, emulsify with a high-speed emulsifying dispersing homogenizer, the emulsifying speed is 12000rpm / min, slowly add 5mL of n-amyl alcohol (5% of the water volume in step 1) during the emulsification process, and emulsify After 20 minutes, the emulsion was obtained.

[0037] 3) Pour the emulsion into a three-necked flask and change it to magnetic stirring at a speed of 400rpm / min. After stabilization, add 3g of phenyltrimethoxysilane (the mass ratio to n-octadecane is 0.6:1) dropwise for hydrolysis. 10 minutes after the dropwise addition, the hydrolysis was completed. At this tim...

Embodiment 2

[0043] 1) Add 100g (100mL) deionized water in a beaker, add dropwise hydrochloric acid to adjust its pH value to 2.18, then add 0.1g (2% of n-octadecane mass) sodium dodecylbenzenesulfonate, stir to make After dissolving it, add 5.0 g of n-octadecane (the mass ratio of water to water is 1:20), stir and mix evenly to obtain an oil-in-water mixed liquid.

[0044] 2) Place the beaker in a water bath at 80° C., emulsify with a high-speed emulsifying and dispersing homogenizer, and the emulsifying speed is 3000 rpm / min. Slowly add 5 mL of n-amyl alcohol (5% of the water volume in step 1) during the emulsifying process to emulsify After 20 minutes, the emulsion was obtained.

[0045] 3) Pour the emulsion into a three-necked flask and change it to magnetic stirring at a speed of 400rpm / min. After stabilization, add 3g of phenyltrimethoxysilane (the mass ratio to n-octadecane is 0.6:1) dropwise for hydrolysis. 10 minutes after the dropwise addition, the hydrolysis was completed. At t...

Embodiment 3

[0049] 1) Add 100g (100mL) deionized water in a beaker, add dropwise hydrochloric acid to adjust its pH value to 2.18, then add 0.1g (2% of n-octadecane mass) sodium dodecylbenzenesulfonate, stir to make After dissolving it, add 5.0 g of n-octadecane (the mass ratio of water to water is 1:20), stir and mix evenly to obtain an oil-in-water mixed liquid.

[0050] 2) Place the beaker in a water bath at 80° C., emulsify with a high-speed emulsifying and dispersing homogenizer, and the emulsifying speed is 3000 rpm / min. Slowly add 5 mL of n-amyl alcohol (5% of the water volume in step 1) during the emulsifying process to emulsify After 20 minutes, the emulsion was obtained.

[0051] 3) Pour the emulsion into a three-necked flask and change it to magnetic stirring at a speed of 400rpm / min. After stabilization, add 3g of phenyltrimethoxysilane (the mass ratio to n-octadecane is 0.6:1) dropwise for hydrolysis. 10 minutes after the dropwise addition, the hydrolysis was completed. At t...

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Abstract

The invention provides a low-temperature phase-change thermal storage microcapsule as well as a preparation method and an application thereof. The microcapsule has a core-shell structure and belongs to low temperature thermal storage materials. The preparation method includes the following steps: by taking the n-octadecane as a thermal storage medium, dispersing the n-octadecane into the water solution, and adding an emulgator to emulsify to obtain an emulsion; by taking phenyl trimethoxysilane as a polymeric monomer, with the help of the O/W miroemulsion template effect, hydrolytically polymerizing the phenyl trimethoxysilane on the surface of the n-octadecane micro droplets to obtain the silicon dioxide, and then finishing the cladding and self-assembling process; and finally, washing and drying to obtain the microcapsule. The method disclosed by the invention has the characteristics of being simple in process and easy to control. The microcapsule disclosed by the invention has an integral spherical shape, a smaller particle size and good uniformity; and the microcapsule also has a higher thermal storage density, which can be applied in the fields of temperature self-operating fabrics, wall filling materials, solar energy development and utilization and industrial waste heat recovery.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a low-temperature phase change thermal storage microcapsule, a preparation method and application thereof. Background technique [0002] Traditional fossil fuel energy is running out, how to improve the efficiency of existing energy utilization and develop new renewable alternative energy is an urgent problem to be solved. Phase change heat storage material is a kind of material that can be used to control the temperature of the surrounding environment or store heat energy by using the phase change of the material at the phase change temperature, accompanied by the absorption or release of heat. In view of this characteristic, heat storage materials can be used as self-regulating materials in building walls, textiles, etc., and heat storage technology can also be used in the recovery of industrial waste heat, power supply "peak shifting and valley filling" and the development and utilizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/14
CPCB01J13/14C09K5/06
Inventor 马胜强邢建东陶鹏何雅玲王勇
Owner XI AN JIAOTONG UNIV
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