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Inorganic hydrated salt phase change energy storage microcapsule and preparation method thereof

A technology of inorganic hydrated salt and phase change energy storage, which is applied in the field of preparation of energy storage microcapsule materials, and achieves the effects of simple process, reduced supercooling degree and low cost

Inactive Publication Date: 2016-12-21
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, most of the microencapsulation of phase change materials is concentrated in organic phase change materials, while the microencapsulation of inorganic hydrated salt phase change materials is rarely reported in literature and patents.

Method used

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  • Inorganic hydrated salt phase change energy storage microcapsule and preparation method thereof

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preparation example Construction

[0022] In order to realize the preparation of the above-mentioned inorganic phase change energy storage microcapsules, the specific steps are as follows:

[0023] (1) adding the core material to deionized water to prepare a saturated solution of the core material;

[0024] (2) Add the emulsifier to the saturated solution of the core material. The quality of the emulsifier is 0.001 to 0.2 times the mass of the core material. Ultrasonic emulsify in an ultrasonic cell pulverizer or ultrasonic cleaning machine for 20 to 50 minutes, and then in 35 to Using magnetic stirring in a water bath at 60°C for 30 to 60 minutes at a speed of 600 to 1200 rpm to obtain a uniformly dispersed core material emulsion (A);

[0025] (3) Add the wall material prepolymer into the organic phase, and continue stirring for 30 minutes at a speed of 600-1000 rpm in a magnetic stirrer to obtain a transparent prepolymer solution (B); the wall material prepolymer The amount of polymer added is based on the c...

Embodiment 1

[0033] (1) Weigh 15g of sodium thiosulfate pentahydrate, dissolve it in 20mL of deionized water to form a solution, add 0.6-1.0g of sodium lauryl sulfate, and ultrasonically disperse in an ultrasonic cell pulverizer for 40 minutes, Then it was magnetically stirred in a constant temperature water bath at 35° C. at a stirring rate of 800 rpm for 30 minutes to obtain a uniform core material emulsion (A).

[0034] (2) Add 6-8 mL of tetraethyl orthosilicate to 25 mL of cyclohexane, and keep stirring for 30 minutes at a speed of 600-1000 rpm in a magnetic stirrer, then add 5 mL of amyl alcohol dropwise under stirring , and then continued to stir for 10 minutes at the same rotating speed to obtain a transparent prepolymer solution (B).

[0035](3) Add the uniformly dispersed core material emulsion (A) dropwise to the transparent prepolymer solution (B), keep a constant temperature at 60°C, and magnetically stir at a speed of 600-1000rpm for 30 minutes to form a uniformly dispersed so...

Embodiment 2

[0037] (1) Weigh 12g of sodium acetate trihydrate, dissolve it in 15mL of deionized water to form a solution, add 0.6-0.8g of sodium dodecylbenzenesulfonate, and ultrasonically disperse in an ultrasonic cell pulverizer for 30 minutes, and then magnetically stirred in a constant temperature water bath at 40° C. at a stirring rate of 600 rpm for 40 minutes to obtain a uniform core material emulsion (A).

[0038] (2) Add 8-10 mL of sodium silicate solution into 30 mL of ethanol, and continue stirring for 30 minutes at a speed of 600-1000 rpm in a magnetic stirrer to obtain a transparent prepolymer solution (B).

[0039] (3) Add the uniformly dispersed core material emulsion (A) dropwise to the transparent prepolymer solution (B), keep a constant temperature at 50°C, and magnetically stir at a speed of 600-1000rpm for 30 minutes to form a uniformly dispersed solution, Then, hydrochloric acid was added dropwise during the stirring process to adjust the pH value of the solution to 9...

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Abstract

Belonging to preparation methods of energy storage microcapsule materials, the invention provides an inorganic hydrated salt phase change energy storage microcapsule and a preparation method thereof. The energy storage microcapsule includes an inorganic hydrated salt serving as the core material and an inorganic material serving as the wall material. The core material is one or more of potassium fluoride dehydrate, sodium acetate trihydrate, sodium thiosulfate pentahydrate, calcium chloride hexahydrate, magnesium sulfate heptahydrate, barium hydroxide octahydrate, sodium sulfate decahydrate, sodium sulfate decahydrate, disodium hydrogen phosphate dodecahydrate, ammonium aluminium sulfate dodecahydrate, aluminum potassium sulfate dodecahydrate, and aluminum sulphate ocatadecahydrate. The wall material is one or more of silicon dioxide, calcium carbonate, alumina and titanium dioxide. The core material accounts for 30%-80% of the mass of the microcapsule composite material, and the wall material accounts for 20%-70% of the mass of the microcapsule energy storage material. The prepared phase change energy storage microcapsule material has a phase transition temperature of 25-100DEG C and a diameter of 0.1-50 micrometers. The phase change energy storage microcapsule has the advantages of high encapsulation rate, good sealing performance, large phase change potential heat value, and simple preparation method, and has great industrial application prospect.

Description

technical field [0001] The invention relates to a preparation method of an energy storage microcapsule material, in particular to an inorganic hydrate salt phase change energy storage microcapsule and a preparation method thereof. Background technique [0002] With the increasing energy shortage and environmental pollution, especially the impact of the massive use of fossil fuels such as coal and oil on the environment and global climate, the goal of human sustainable development is facing serious threats. Obviously, the research and development of new energy and renewable energy, seeking advanced methods to improve energy efficiency, has become the primary issue of global concern. In recent years, in order to improve energy utilization, phase change energy storage technology has been widely used in energy saving, consumption reduction and renewable energy utilization. Phase change energy storage technology uses phase change materials to absorb or release a large amount of ...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 饶中浩刘臣臻
Owner CHINA UNIV OF MINING & TECH
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