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Monodisperse high-stability inorganic hydrated salt phase change nanocapsule as well as preparation method and application thereof

A technology of inorganic hydrated salts and nanocapsules, which is applied in the direction of microcapsule preparations, microsphere preparation, chemical instruments and methods, etc., can solve the problems of no phase change nanocapsules, etc., and achieve good market application prospects, stable performance, and packaging The effect of high coverage

Pending Publication Date: 2022-03-29
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods use organic or inorganic materials as the shell to prepare micron-sized phase-change microcapsules, but there are no similar reports on the preparation of nano-sized phase-change nanocapsules by in-situ polymerization.

Method used

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  • Monodisperse high-stability inorganic hydrated salt phase change nanocapsule as well as preparation method and application thereof
  • Monodisperse high-stability inorganic hydrated salt phase change nanocapsule as well as preparation method and application thereof
  • Monodisperse high-stability inorganic hydrated salt phase change nanocapsule as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of monodisperse highly stable inorganic hydrated salt phase-change nanocapsules, comprising the following steps:

[0040] (1) Preparation of water phase

[0041] Weigh 10g of disodium hydrogen phosphate dodecahydrate, 0.5g of Tween80 and 0.5g of maleic anhydride into a sample bottle, place it in a water bath at 50°C and heat it with stirring to melt it completely to obtain an aqueous phase;

[0042] (2) Preparation of oil phase A and oil phase B

[0043] Weigh 50ml of hexadecane into a 100ml beaker, heat to 50°C to obtain oil phase A; weigh 50ml of hexadecane, 5g of MMA and 0.1g of AIBN into a sample bottle, and place in an ultrasonic cleaner , sonicate for 10 minutes to obtain oil phase B;

[0044] (3) Preparation of core material emulsion

[0045] Add the water phase to the oil phase A, and emulsify it with a high-speed shearing machine at a shear rate of 7000 rpm for 5 minutes to obtain a core material emulsion;

[0046] (4) Preparation of hy...

Embodiment 2

[0049] A preparation method of monodisperse highly stable inorganic hydrated salt phase-change nanocapsules, comprising the following steps:

[0050] (1) Preparation of water phase

[0051] Weigh 10g of calcium chloride hexahydrate, 0.5g of Tween80 and 0.5g of maleic anhydride into a sample bottle, place it in a water bath at 50°C and heat it with stirring to melt it completely to obtain an aqueous phase;

[0052] (2) Preparation of oil phase A and oil phase B

[0053] Weigh 50ml of hexadecane into a 100ml beaker, heat to 50°C to obtain oil phase A; weigh 50ml of hexadecane, 5g of styrene and 0.1g of AIBN into a sample bottle, and place in ultrasonic cleaning In the device, ultrasonic for 10 minutes to obtain oil phase B;

[0054] (3) Preparation of core material emulsion

[0055] Add the water phase to the oil phase A, and emulsify it with a high-speed shearing machine at a shear rate of 12000 rpm for 5 minutes to obtain a core material emulsion;

[0056] (4) Preparation ...

Embodiment 3

[0059] A preparation method of monodisperse highly stable inorganic hydrated salt phase-change nanocapsules, comprising the following steps:

[0060] (1) Preparation of water phase

[0061] Weigh 10g of sodium acetate trihydrate, 0.5g of Tween80 and 0.5g of maleic anhydride into a sample bottle, place it in a water bath at 60°C and heat it with stirring to melt it completely to obtain an aqueous phase;

[0062] (2) Preparation of oil phase A and oil phase B

[0063] Weigh 50ml of hexadecane into a 100ml beaker, heat to 60°C to obtain oil phase A; weigh 50ml of hexadecane, 10g of styrene and 0.1g of AIBN into a sample bottle, and place in ultrasonic cleaning In the device, ultrasonic for 10 minutes to obtain oil phase B;

[0064] (3) Preparation of core material emulsion

[0065] The water phase is added in the oil phase A, and it is emulsified using a high-speed shearing machine at the same time, the shear rate is 15000rpm, and continues for 10min to obtain the core materia...

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Abstract

The invention belongs to the technical field of phase-change materials and preparation thereof, and discloses a monodisperse high-stability inorganic hydrated salt phase-change nanocapsule as well as a preparation method and application thereof. A wall material of the nanocapsule is an organic polymer material such as polymethyl methacrylate and polystyrene, a core material is an inorganic hydrated salt phase change material, and the mass ratio of the core material in the capsule is 20-95%. According to the invention, an in-situ polymerization preparation technology is adopted, a water-based inorganic hydrated salt core material is dispersed in an alkane solvent for emulsification to form a W / O type emulsion with good dispersion stability, and an oil-soluble nanocapsule shell material is added, so that a polymer is enriched on an oil-water interface and is polymerized to form a compact shell which completely coats the core material; and finally obtaining the hydrated salt nano phase change capsule material with the hydrated salt wrapped by the polymer. The hydrated salt nanocapsule disclosed by the invention is high in coating rate, good in dispersion system and stable in performance, and has a good market application prospect.

Description

technical field [0001] The invention belongs to the technical field of phase change materials and their preparation, in particular to a monodisperse high stability inorganic hydrated salt phase change nanocapsule and its preparation method and application Background technique [0002] Phase change materials are a new class of energy storage materials with high heat storage density and constant phase transition temperature. It has important application value for solar heat utilization, industrial waste heat recovery, power grid peak shifting, electronic heat dissipation, green building and other fields. [0003] Crystalline hydrate salt is a common inorganic phase change material, which has the advantages of various types, wide phase change temperature range, high energy storage density, good thermal conductivity, low cost, non-toxic and harmless, etc. It has been widely used in solar thermal Utilization, building heating and other fields. But hydrated salts are prone to ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/18
CPCC09K5/063B01J13/18
Inventor 李俊陈颖陈浩鑫贾莉斯朱肖运
Owner GUANGDONG UNIV OF TECH
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