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

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...

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

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