Microcapsule phase-change particles compounding nano-aluminum and carbon nanotube and preparation method thereof
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A composite nanoparticle and carbon nanotube technology, applied in the field of materials science, can solve the problems of poor thermal conductivity, poor particle stability, and unfavorable energy storage, and achieve the effects of improving thermal conductivity, low supercooling, and high thermal conductivity.
Inactive Publication Date: 2017-07-25
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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[0023] Aiming at the above-mentioned technical problems in the prior art, the invention provides a kind of microcapsule phase-change particles of composite nano-aluminum and carbon nanotubes, and the microcapsule phase-change particles o
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[0042] Example 1
[0043] 1) A step of weighing the core material and the wall material, according to the core-wall mass ratio of 2:1, weigh 40g of the core material n-octadecane, 10g each of the wall material gelatin and gum arabic;
[0044] 2) A step to determine the composite amount of nanoparticles, the total composite amount of composite nano aluminum and carbon nanotubes accounts for 3% of the total mass of the core wall, that is, 1.8 g;
[0045] 3) A step of preparing a mixture of nano-aluminum and carbon nanotubes, the mass ratio of nano-aluminum and carbon nanotubes is 1:1, and 0.9g nano-aluminum and 0.9g carbon nanotubes are taken to obtain a nano-aluminum and carbon nanotube mixture;
[0046] 4) A step of preparing a wall material solution: the first wall material gelatin and the second wall material gum arabic are respectively dissolved in 100 g of deionized water to prepare the first wall material solution and the second wall material solution;
[0047] 5) A step of prepari...
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[0050] Example 2
[0051] 1) A step of weighing the core material and wall material, according to the core-wall mass ratio of 3:1, weigh 60g of paraffin wax, wall material gelatin and gum arabic 10g each;
[0052] 2) A step of determining the composite amount of nanoparticles, the total composite amount of composite nano aluminum and carbon nanotubes accounts for 5% of the total mass of the core wall, that is, 4 g;
[0053] 3) A step of preparing a mixture of nano-aluminum and carbon nanotubes, the mass ratio of nano-aluminum and carbon nanotubes is 1:3, and 1g of nano-aluminum and 3g of carbon nanotubes are taken to obtain a mixture of nano-aluminum and carbon nanotubes;
[0054] 4) A step of preparing a wall material solution: the first wall material gelatin and the second wall material gum arabic are respectively dissolved in 100 g of deionized water to prepare the first wall material solution and the second wall material solution;
[0055] 5) A step of preparing the core material co...
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Abstract
The invention relates to microcapsule phase-change particles compounding nano-aluminum and carbon nanotube, which are respectively prepared from a core material and a wall material arranged at the outer side of the core material, wherein the wall material and the core material are respectively and internally provided with nano-aluminum and carbon nanotubes, and the sum of the mass of the nano-aluminum and the mass of the carbon nanotubes is 3-5% of the total mass of the core material and the wall material. The invention provides a preparation method of a microcapsule phase-change material. The method comprises the steps of weighing the core materials and the wall materials, weighing composite nanoparticles, preparing a wall material solution, preparing a core material composite solution, molding microcapsules, and drying the microcapsules. Three characteristics are improved at the same time by compounding the nano-aluminum and the carbon nanotubes into the core materials and the wall materials, namely, the particle density of the microcapsule phase-change material is changed, the heat conductivity coefficient of the microcapsule phase-change material is increased, and the supercooling degree of the microcapsule phase-change material is reduced; therefore, the microcapsule phase-change material compounding the nano-aluminum and the carbon nanotube, which is moderate in density, high in heat conductivity coefficient and low in supercooling degree, 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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