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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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-temperature applications, and is volatile, flammable, even explosive, or aging due to slow oxidation by oxygen in the air
[0004] US 4708812, CN 1844269A, CN1903971A introduced phase-change microcapsules, which use organic polymers as capsule wall materials to wrap and seal phase-change materials. The phase-change enthalpy is large, but the volume changes during phase-change. Repeated shrinkage and expansion make the material Shorter service life and with physical interaction between the core and shell, leakage and phase separation can still occur

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 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 crosslinking agent: 2 parts by weight of 2,4-toluene diisocyanate, mix at 50°C for 6 hours to prepare 2,2-dimethyl - propanol prepolymer. Then the formed 2,2-dimethyl-propanol prepolymer was stirred and mixed with 25 parts by weight of borax in a high-speed mixer at 95°C, and the speed of the mixer was set to 2000rpm. After 3 hours, add thickening Agent: 2 parts by weight of polyvinyl alcohol (molecular weight: 16,000) is solidified at low temperature, and the method of nitrogen gas flow through the refrigerant can be selected for low temperature solidifica...

Embodiment 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: polyethylene wax (molecular weight 2000) 3 parts by weight.

[0031] Preparation method: Mix 56 parts by weight of 2,2-dicarboxymethyl-propanol; mix with 3 parts by weight of crosslinking agent: hydroxyethyl acrylate, mix at 60°C for 4 hours to prepare 2,2-dicarboxymethyl-propanol propanol prepolymer. Then the formed 2,2-dicarboxymethyl-propanol prepolymer was stirred and mixed with 28 parts by weight of borax in a high-speed stirrer at 105° C., and the speed of the stirrer was set at 1800 rpm. After continuing for 4 hours, adding Thickening agent: 3 parts by weight of polyethylene wax (molecular weight: 2000) can be solidified at low temperature, and can be solidified at low temperature by passing nitrogen ...

Embodiment 3

[0033] The mixed phase change energy storage material of this embodiment, its raw material 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, 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 in a high-speed stirrer at 105° C., and the speed of the stirrer was set at 2300 rpm for 4 hours, and then added Thickening agent: 6 parts by weight of polyethylene wax (molecular weight: 3000) can be solidified at low temperature, and can be solidified at low temperature by...

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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.

Description

technical field [0001] The invention belongs to the field of research and development of new materials, and in particular relates to a hybrid phase change energy storage material and its preparation and application. Background technique [0002] Phase change energy storage is the theoretical understanding of energy storage in modern physics, and a relatively mature theory has been formed, but there is still a lot of room for development of phase change energy storage materials. Due to the rapid growth of energy consumption and the urgent need for efficient energy utilization, the research on phase change energy storage materials is very important, because it is the embodiment of energy saving and energy utilization. According to the way of energy storage, energy storage materials can be roughly divided into three categories: sensible heat energy storage, latent heat energy storage and chemical reaction energy storage. Phase change energy storage is a latent heat energy stor...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 储江顺毕宏海彭艳华毕宏清程启山汪丽陈旭睿毕宏俊欧阳贵薛明跃
Owner SHANGHAI BANZAN MACROMOLECULE MATERIAL
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