Preparation method of composite phase-change material

A composite phase change material and phase change material technology, applied in the application field of new materials, can solve the problems of difficult actual production, harsh preparation conditions, and complicated process.

Inactive Publication Date: 2011-05-04
沈阳临德陶瓷研发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the leakage of paraffin and other solid-liquid phase transitions, it must be packaged in containers, such as the application in building energy saving, which limits its use.
In recent years, researchers have considered a variety of methods to sol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 30g nano-SiO 2 and 10g nano TiO 2 After mixing evenly, put it into a beaker and heat at 90°C for 40 minutes.

[0017] Take 80g of paraffin, put it into a beaker, put the beaker in a constant temperature water bath and heat it at 90°C until it melts, then add 300ml of distilled water and 2g of sodium dodecylbenzenesulfonate to the paraffin, and use a high-shear emulsifier to shear at a high speed Cut and emulsify, then pour it into nano powder and mix evenly, put it into an electric blast oven and dry it at 50°C to get a block solid, and grind it into powder.

Embodiment 2

[0019] 35g nano-SiO 2 and 5g nano TiO 2 After mixing evenly, put it into a beaker and heat at 95°C for 40 minutes.

[0020] Take 90g of stearic acid, put it into a beaker, put the beaker in a constant temperature water bath and heat it at 95°C until it melts, then add 400ml of distilled water and 2g of calcium dodecylbenzenesulfonate to the stearic acid, use high shear The emulsifying machine high-speed shears and emulsifies, and then pours it into the nano-powder and mixes it evenly, puts it into an electric blast oven and dries it at 55°C to obtain a block solid, and grinds it into a powder.

Embodiment 3

[0022] 30g nano-SiO 2 and 10g nano TiO 2 After mixing evenly, put it into a beaker and heat at 90°C for 40 minutes.

[0023] Take 80g of pentadecane, put it into a beaker, put the beaker in a constant temperature water bath and heat it at 90°C until it melts, then add 300ml of distilled water and 3g of sodium dodecylbenzenesulfonate to the stearic acid, use high shear Cut and emulsify with high-speed shearing and emulsification, then pour it into nano powder and mix evenly, put it in an electric blast oven and dry it at 50°C to get a block solid, and grind it into powder.

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PUM

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Abstract

The invention relates to a preparation method of a composite phase-change material, belonging to the technical field of application of a new material. In the method, nano SiO2 powder having high adsorption property and nano TiO2 powder having an infrared shielding effect are used as substrates to adsorb paraffin so as to prepare a composite phase-change energy storage material. The preparation method comprises the following steps: A. placing a phase-change material in a beaker, heating the beaker in a thermostatic water bath, adding distilled water and emulsifying agent to the phase-change material, and carrying out high-speed shearing and emulsification with a high-shear emulsifying machine; B. uniformly mixing nano SiO2 and nano TiO2, and then, heating the mixture in a beaker; and C. pouring the phase-change material obtained after emulsification in the step A into the oxide powder in the step B, uniformly mixing, drying in an oven to obtain lumpish solids, and grinding the lumpish solids into powder. The invention has the advantages of simple process and low cost, can effectively solve the problem of leakage in the solid-liquid phase change process and can greatly improve the phase-change temperature, latent heat of phase change, thermal stability and heat storage effect of phase-change materials such as paraffin and the like.

Description

technical field [0001] The invention relates to a preparation method of a composite phase change material, in particular to a composite phase change material formed of nano inorganic oxides and a phase change material and a preparation method thereof. It belongs to the technical field of new material application. Background technique [0002] With the development of society and economy, human beings' demand for energy is increasing. However, at present, the global energy shortage is increasing day by day, and at the same time, irrational use causes a lot of waste, which makes people have to study new energy-saving materials to improve energy utilization. Among them, the use of phase change materials is considered to be one of the effective methods to improve energy utilization. [0003] Phase change materials have the characteristics of high heat storage density and approximately isothermal heat storage and release process, which can achieve the purpose of energy storage a...

Claims

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Application Information

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IPC IPC(8): C09K5/06C09K3/00
Inventor 亢永珍韩绍娟许壮志薛健张明高琳琳
Owner 沈阳临德陶瓷研发有限公司
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