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Metal phase change microcapsule with thermal expansion cavity and preparation method of metal phase change microcapsule

A technology of metal phase change and microcapsules, which is applied in the direction of microcapsule preparation, microsphere preparation, heat exchange materials, etc., can solve the problems of poor thermal cycle performance of metal microcapsules and easy rupture of metal microcapsules, and achieve a breakthrough in preparation technology Bottleneck, improving the level of phase change energy storage technology, and improving the effect of thermal cycle stability

Active Publication Date: 2021-03-12
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above deficiencies in the prior art, the object of the present invention is to provide a metal phase-change microcapsule with a thermal expansion cavity and a preparation method thereof, so as to solve the problem of poor thermal cycle performance of the existing metal microcapsules, and the metal microcapsules are easily damaged. problems such as rupture

Method used

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  • Metal phase change microcapsule with thermal expansion cavity and preparation method of metal phase change microcapsule
  • Metal phase change microcapsule with thermal expansion cavity and preparation method of metal phase change microcapsule
  • Metal phase change microcapsule with thermal expansion cavity and preparation method of metal phase change microcapsule

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Embodiment 1

[0033] The preparation method of the metal phase change microcapsule with thermal expansion cavity of the present embodiment comprises the following steps:

[0034] S1: Weigh 6g of spherical metal alloy powder (SnBi58), and evenly disperse it in 100ml of deionized water to obtain a dispersion; then add 0.55g of methacrylic acid (MAA) monomer, and then add 0.02g of ammonium persulfate as an initiator , under the power of 200w, ultrasound assists the interfacial polymerization reaction on the surface of the alloy particles, reacts for 30min, and obtains pre-microcapsules, uses deionized water to wash the pre-microcapsules three times, and then filters them with suction, and dries at 80°C for 5h to obtain PMMA / SnBi58 phase change microcapsules;

[0035] S2: preparation concentration is the ammonium fluorotitanate aqueous solution of 100g / L and the boric acid aqueous solution that concentration is 100g / L; Get the PMMA / SnBi58 phase change microcapsule that 5g step S1 obtains, add ...

Embodiment 2

[0039] The preparation method of the metal phase change microcapsule with thermal expansion cavity of the present embodiment comprises the following steps:

[0040]S1: Weigh 6g of spherical metal alloy powder (SnBi58), and evenly disperse it in 100ml of deionized water to obtain a dispersion; add 1g of methacrylic acid (MAA) monomer, and then add 0.02g of benzoyl peroxide as an initiator , under the power of 200w, ultrasound assists the interfacial polymerization reaction on the surface of the alloy particles, reacts for 30min, and obtains pre-microcapsules, uses deionized water to wash the pre-microcapsules three times, and then filters them with suction, and dries at 80°C for 5h to obtain PMMA / SnBi58 phase change microcapsules;

[0041] S2: preparation concentration is the ammonium fluorotitanate aqueous solution of 100g / L and the boric acid aqueous solution that concentration is 100g / L; Get the PMMA / SnBi58 phase change microcapsule that 5g step S1 obtains, add 0.5g surfact...

Embodiment 3

[0045] The preparation method of the metal phase change microcapsule with thermal expansion cavity of the present embodiment comprises the following steps:

[0046] S1: Weigh 6g of spherical metal alloy powder (SnBi58), and evenly disperse it in 100ml of deionized water to obtain a dispersion; add 2g of methacrylic acid (MAA) monomer, and then add 0.02g of benzoyl peroxide as an initiator , under the power of 200w, ultrasound assists the interfacial polymerization reaction on the surface of the alloy particles, reacts for 30min, and obtains pre-microcapsules, uses deionized water to wash the pre-microcapsules three times, and then filters them with suction, and dries at 80°C for 5h to obtain PMMA / SnBi58 phase change microcapsules;

[0047] S2: preparation concentration is the ammonium fluorotitanate aqueous solution of 100g / L and the boric acid aqueous solution that concentration is 100g / L; Get the PMMA / SnBi58 phase change microcapsule that 5g step S1 obtains, add 0.5g surfac...

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Abstract

The invention discloses a metal phase change microcapsule with a thermal expansion cavity, the microcapsule takes metal particles as a core material, the core material is coated with a porous inorganic wall material layer, and a layer of thermal expansion cavity is arranged between the core material and the porous inorganic wall material layer; the thermal expansion cavity and the porous inorganicwall material layer are subjected to thermal treatment through an organic layer and an inorganic layer which are coated outside the core material, and organic matters in the organic layer are decomposed into gas which escapes from the inorganic layer. The metal phase change microcapsule provided by the invention provides a thermal expansion space for metal, solves the problem of microcapsule breakage caused by metal thermal expansion from the source, greatly improves the thermal cycle stability, breaks through the technical bottleneck of metal microcapsule preparation, has good heat conduction, energy storage and temperature adjustment functions and the like, and can be widely applied to the fields of heat storage, electronic equipment heat dissipation and the like.

Description

technical field [0001] The invention relates to the technical field of phase change microcapsule materials, in particular to a metal phase change microcapsule with a thermal expansion cavity and a preparation method thereof. Background technique [0002] There is a large amount of waste heat in the exhaust gas of steel, chemical industry and marine diesel engine. Due to the unstable working conditions, this part of heat is difficult to be directly used and discharged directly. Therefore, the use of high-efficiency heat storage medium to recover this part of heat has a good application prospect. With the proliferation of electric vehicles, laptops and smartphones, the demand for high energy density Li-ion batteries is increasing. However, batteries generate a lot of heat during charging and discharging, and the performance of batteries is largely dependent on temperature, so developing advanced thermal management techniques for Li-ion batteries is crucial to ensure the safe u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02B01J13/16C09K5/06
CPCB01J13/02B01J13/16C09K5/063Y02E60/14
Inventor 邹得球王朔朱思贤鲍家明
Owner NINGBO UNIV
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