Preparation method of alkanol self-temperature control phase change material

Abstract

The invention discloses a preparation method of a phase change material. The preparation method is that dodecanol serving as a main phase change agent and paraffin serving as a secondary phase change agent are adopted for preparing a low-temperature phase change material. The low-temperature phase change material has phase change temperature about 22 DEG C, is relatively high in phase change enthalpy value which is about 180J / g, has stable performance, excellent phase change reversibility and little change in size during the phase change, and is safe, nontoxic and non-corrosive.

Description

technical field [0001] The invention relates to a preparation method of a phase change material, in particular to a phase change material with a phase change temperature of about 25°C. Background technique [0002] In recent years, phase change material (PCM) has become a research hotspot in energy utilization and material science at home and abroad. Phase change energy storage technology can solve the contradiction between energy supply and demand in time and space, and is an important way to improve energy efficiency. effective means of utilization. During the phase change process, phase change materials can absorb heat (cold) from the environment and release heat (cold) to the environment when needed, so as to achieve the purpose of controlling the temperature of the surrounding environment. The use of phase change latent heat of phase change materials for energy storage and application is a topic that has received extensive attention in recent years. [0003] As a typi...

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Problems solved by technology

[0004]However, there are usually two problems in this kind of inorganic phase change materials: one is the supercooling phenomenon, that is, the substance does not crystallize when it condenses to the "condensation point", and Crystallization begins at a certain temperature below the "condensation point". The current solution is to add a nucleating agent to promote its crystallization

[0005] At present, calcium chloride hexahydrate is the main heat storage agent, xanthan gum is the thickener, and SrO2 is Most of the phase change material systems of nucleating agents are put into appropriate occasions according to the melting point of calcium chloride hexahydrate, and the problem of reducing the phase change temperature is not mentioned.

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