Microcapsule phase change particles of compound nano-copper and nano graphene sheet and preparation method

Abstract

The invention relates to microcapsule phase change particles of a compound nano-copper and nano graphene sheet. Each of the particles comprises a core material, wherein a wall material is arranged on the outer side of the core material, nano-copper and nano graphene sheets are arranged in the wall material and the core material, and the nano-copper and nano graphene sheets account for 3-5% of the total mass of the core and wall. The invention provides a preparation method of an improved microcapsule phase change material. The preparation method comprises a step of weighing the core material and the wall material, a step of forming a microcapsule and a step of drying the microcapsule. By compounding the nano-copper and the nano graphene sheet in the core material and the wall material, three characteristics are improved: namely, the density of the microcapsule phase change particles is changed, the heat conductivity coefficient is increased, and the degree of supercooling is reduced; and the microcapsule phase change material of the compound nano-copper and nano graphene sheet moderate in density, high in heat conductivity coefficient and low in degree of supercooling is obtained.

Description

technical field [0001] The invention belongs to the field of materials science and relates to a phase change material, in particular to an improved microcapsule phase change material and a preparation method. Background technique [0002] Microcapsule technology is a technology that uses film-forming materials to coat solids or liquids to form tiny particles. The tiny particles obtained are called microcapsules, and the general particle size is in the range of 1 to 300 μm. The material wrapped inside the microcapsule is called the capsule core (also called core material, core), and the capsule core material is called a phase change material (PCM) called a microcapsule phase change material (MPCM). The phase change microcapsule suspension is a suspension formed by dispersing the prepared microcapsule phase change material particles in a single-phase fluid (such as water, heat transfer oil, etc.). [0003] Research on microcapsule technology began in the 1930s and achieved...

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Problems solved by technology

[0023] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a microcapsule phase-change particle of an improved micro-composite nano-copper and nano-graphene sheet and a preparation method thereof, the composite nano-copper and nano-graphene sheet The microcapsule phase change particles and the preparation method shall solve the technical problems of poor stability, poor thermal conductivity, and unfavorable storage and release of the microcapsule phase change material particles in the prior art

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