Cheap and high-quality mixed phase-change energy storage material

An energy storage material and mixed-phase technology, which is applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of large volume change, small thermal conductivity, supercooling, etc., and achieves simple preparation process, good thermal stability, The effect of high energy storage density

Inactive Publication Date: 2017-07-04

SHANGHAI BANZAN MACROMOLECULE MATERIAL

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Problems solved by technology

At the same time, there are the following disadvantages: one is supercooling phenomenon, the other is phase separation

Organic phase change energy storage materials have the advantages of good formability in solid state, generally less prone to supercooling and phase separation, less corrosive materials, relatively stable performance, low toxicity, and low cost; The material has the following disadvantages: low thermal conductivity, low energy storage density, and organic matter generally has a low melting point, which is not suitable for high-t...

Abstract

The invention belongs to the fields of research and development of new materials, and specifically relates to a cheap and high-quality mixed phase-change energy storage material and an preparation and an application thereof. The mixed phase-change energy storage material provided by the invention comprises the following raw materials in parts by weight: 55 to 58 parts by weight of 2,2-dimethyl-propanol, 25 to 30 parts by weight of borax, 2 to 4 parts by weight of a crosslinking agent and 2 to 6 parts by weight of a thickening agent. The mixed phase-change energy storage material provided by the invention realizes storage and release of energy through reversible solid-liquid phase transition, has a phase-change temperature of 40 to 60 DEG C, can reach a phase-change enthalpy of 240 J/g, and has the advantages of high energy storage density, good thermal stability, no liquid leakage and phase separation, simple preparation process, no toxicity, harmlessness, and good utilization value in the field of phase-change energy storage materials.

Application Domain

Heat-exchange elements

Technology Topic

ChemistryPhase transition +11

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Examples

Experimental program(4)

Example Embodiment

[0025] Example 1

[0026] The mixed phase change energy storage material of this embodiment contains the following components in parts by weight: 55 parts by weight of 2,2-dimethyl-propanol; 25 parts by weight of borax; crosslinking agent: 2,4-toluene 2 parts by weight of diisocyanate; thickener: 2 parts by weight of polyvinyl alcohol (molecular weight 16000).

[0027] Preparation method: mix 55 parts by weight of 2,2-dimethyl-propanol with 2 parts by weight of crosslinking agent: 2,4-toluene diisocyanate, and mix at 50°C for 6 hours to prepare 2,2-dimethyl -Propanol prepolymer. Then mix the formed 2,2-dimethyl-propanol prepolymer with 25 parts by weight of borax at 95℃ in a high-speed mixer and mix it evenly. The rotation speed of the mixer is set to 2000rpm. After 3h, add thickening. Agent: 2 parts by weight of polyvinyl alcohol (molecular weight 16000) is solidified at low temperature, and the method of nitrogen gas through the refrigerant can be selected for low temperature solidification. After curing, the desired phase change energy storage material is obtained.

[0028] In addition, it is found through experiments that the molecular weight of the polyvinyl alcohol in this embodiment can also be 20,000. The crosslinking agent can also be 2,6-toluene diisocyanate. Both can achieve the same effect.

Example Embodiment

[0029] Example 2

[0030] The mixed phase-change energy storage material of this embodiment contains the following components in parts by weight: 56 parts by weight of 2,2-dimethyl-propanol; 28 parts by weight of borax; crosslinking agent: hydroxyethyl acrylate 3 Parts by weight; Thickener: 3 parts by weight of polyethylene wax (molecular weight 2000).

[0031] Preparation method: mix 56 parts by weight of 2,2-dicarboxymethyl-propanol; mix with crosslinking agent: 3 parts by weight of hydroxyethyl acrylate, and mix at 60°C for 4 hours to prepare 2,2-dicarboxymethyl- Propanol prepolymer. Then the formed 2,2-dicarboxymethyl-propanol prepolymer was stirred and mixed uniformly with 28 parts by weight of borax at 105°C in a high-speed stirrer. The speed of the stirrer was set to 1800 rpm for 4 hours, and then added Thickener: 3 parts by weight of polyethylene wax (molecular weight 2000) is solidified at low temperature. The method of nitrogen gas through the refrigerant can be selected for low temperature solidification. After curing, the desired phase change energy storage material is obtained.

Example Embodiment

[0032] Example 3

[0033] The mixed phase change energy storage material of this embodiment contains the following components in parts by weight: 58 parts by weight of 2,2-dimethyl-propanol; 30 parts by weight of borax; crosslinking agent: hydroxyethyl methacrylate 4 parts by weight of ester; thickener: 6 parts by weight of polyethylene wax (molecular weight 3000).

[0034] Preparation method: 58 parts by weight of 2,2-dicarboxymethyl-propanol; mix with crosslinking agent: 4 parts by weight of hydroxyethyl methacrylate, and mix at 65°C for 6 hours to prepare 2,2-dicarboxymethyl -Propanol prepolymer. Then, the formed 2,2-dicarboxymethyl-propanol prepolymer was stirred and mixed with 30 parts by weight of borax at 105°C in a high-speed stirrer. The speed of the stirrer was set to 2300rpm for 4h, and then added Thickener: 6 parts by weight of polyethylene wax (molecular weight 3000) is solidified at low temperature, and the method of nitrogen gas through the refrigerant can be selected for low temperature solidification. After curing, the desired phase change energy storage material is obtained.

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

High energy storage density
good thermal stability

Cheap and high-quality mixed phase-change energy storage material

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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