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Composite phase change energy storage material containing ionic liquid and preparation method thereof

A technology of phase-change energy storage materials and ionic liquids, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of not being directly used as phase-change materials, and achieve large-scale popularization and application, low vapor pressure, and overcoming The effect of low thermal stability

Inactive Publication Date: 2016-07-13
MAANSHAN NBWAVE HEAT ENERGY SCI
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Problems solved by technology

[0009] Chinese invention patent CN101519581A discloses a phase change energy storage material and its preparation method: react polyethylene glycol prepolymer and cellulose ionic liquid solution at 60-80°C for 4-8 hours to obtain the required phase change energy storage material. Energy materials, wherein the ionic liquid used is imidazolium ionic liquid as a reaction intermediate, but the ionic liquid is used as a reaction intermediate, not directly as a phase change material, and the anion contained in the imidazolium ionic liquid is an organic functional group

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  • Composite phase change energy storage material containing ionic liquid and preparation method thereof

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preparation example Construction

[0031] b. Preparation of propylamine formate ionic liquid: Slowly add formic acid in an equimolar amount to propylamine to an aqueous solution of propylamine under vigorous stirring, react at room temperature for 4 hours, distill water under reduced pressure at 85°C, and dry in vacuum under reduced pressure for 24 hours.

[0032] Store the 1-methylimidazolium dihydrogen phosphate and alanine formate ionic liquid prepared above for future use.

Embodiment 1

[0034] Weigh 22.5g of 1-methylimidazolium dihydrogen phosphate ionic liquid, 22.5g of propylamine formate ionic liquid and 5g of diethanol monoisopropanolamine surfactant in a beaker, and place them in a water bath at 80°C After stirring evenly, add 8.33g of expanded graphite and continue to stir for 1h, then place it in a vacuum drying oven at 60°C for 4h, cool to room temperature after adsorption, and obtain ionic liquid / nonionic surfactant / expanded graphite for air energy water heater Composite shape-setting phase-change materials.

Embodiment 2

[0036] Weigh 47.5g of propylamine formate ionic liquid and 2.5g of fatty alcohol polyoxyethylene ether silane WA surfactant in a beaker, stir evenly in a water bath at 70°C, add 5g of expanded graphite and continue stirring for 2h , and then placed in a vacuum oven at 60°C for immersion for 6 hours, and cooled to room temperature after adsorption to obtain an ionic liquid / nonionic surfactant / expanded graphite composite phase change material for air energy water heaters.

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Abstract

The invention discloses a composite phase change energy storage material containing ionic liquid and a preparation method thereof and belongs to the technical field of phase change energy storage materials.The composite phase change material is formed by compounding a phase change energy storage material and a supporting material.The phase change energy storage material is formed by mixing one or two of 1-methyl imidazole dihydric phosphate and the propylamine formate ionic liquid and one or two of formate diethanolisopropanolamine, twain-80, polyethylene glycol 400 and fatty alcohol-polyoxyethylene ether WA, wherein the mass ratio of the ionic liquid is 90-95%.The supporting material is expanded graphite.The mass ratio of the phase change energy storage material to the expanded graphite is (6-10):1, and the phase change energy storage material is evenly adsorbed in holes of the expanded graphite.According to the composite phase change energy storage material containing the ionic liquid, the phase change temperature is about 46+ / -2.0 DEG C, the phase change latent heat is large (150-180 KJ / Kg), the volume slightly expands, the preparation method is simple, cost is low, no volatility exists, emissions of waste water, waste gas and waste residues are avoided, and large-scale application and popularization are promoted.

Description

technical field [0001] The invention belongs to the technical field of phase change energy storage materials, in particular to a composite phase change energy storage material containing ionic liquid and a preparation method thereof, which can be used as a phase change energy storage material for air energy water heaters. Background technique [0002] Air energy water heaters, also known as "air source heat pump water heaters", transfer heat from the air to water through refrigerants. Traditional electric water heaters and gas water heaters obtain heat energy by consuming electricity and gas, while air-energy water heaters heat water by absorbing heat in the air, which can absorb about three times the amount of electric energy when consuming the same amount of electric energy. thermal energy to heat water. However, since the current air energy water heater uses water as the energy storage medium, it is bulky and difficult to enter thousands of households. Therefore, to solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 冒爱琴汪吉平葛飞俞海云林娜郑翠红闫勇丁赔赔
Owner MAANSHAN NBWAVE HEAT ENERGY SCI
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