Preparation method of high-efficiency and environment-friendly graphene-paraffin phase change microcapsule material

A phase-change microcapsule and environmentally friendly technology, which is applied in the direction of microcapsule preparation, microsphere preparation, heat exchange materials, etc., can solve the problems of low production efficiency, high pollution, low yield, etc., and achieve low product loss and high yield High, low workload effect

Pending Publication Date: 2022-02-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The present invention solves the problems of low yield, high pollution and low production efficiency in the production process of the existing graphene-paraffin phase change microcapsule material, and then provides a high-efficiency and environment-friendly preparation of graphene-paraffin phase change microcapsule material method

Method used

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  • Preparation method of high-efficiency and environment-friendly graphene-paraffin phase change microcapsule material
  • Preparation method of high-efficiency and environment-friendly graphene-paraffin phase change microcapsule material
  • Preparation method of high-efficiency and environment-friendly graphene-paraffin phase change microcapsule material

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specific Embodiment approach 1

[0038] Specific embodiment one: the preparation method of a kind of highly efficient and environment-friendly graphene-paraffin phase change microcapsule material of this embodiment, it is carried out according to the following steps:

[0039] 1. Dilute the concentration of graphene oxide in the brown-black graphene oxide thick slurry, and ultrasonically disperse the agglomerated graphene oxide completely to obtain a graphene oxide dispersion;

[0040] 2. Under the condition of a water bath with a temperature of 70° C. to 90° C., adjust the pH of the graphene oxide dispersion to 9 to 10 to obtain a pH-adjusted solution;

[0041] 3. Under the condition of a water bath with a temperature of 70°C-90°C, add solid paraffin to the pH-adjusted solution, heat until the solid paraffin melts, and use a three-blade stirring paddle at a temperature of 70°C-90°C and a speed of 900r Under the condition of / min~1300r / min, stir at a high speed for 0.5h~1.5h to obtain a brown dispersion liquid...

specific Embodiment approach 2

[0061] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the brown-black graphene oxide thick slurry described in step one is specifically prepared according to the following steps:

[0062] Mix flake graphite and concentrated sulfuric acid to obtain a mixture. Under the conditions of an ice bath and a stirring speed of 300rpm-600rpm, add potassium permanganate to the mixture within 30min and stir for 2h-4h to obtain a purple-black viscous liquid. Under the condition of water bath and stirring speed of 300rpm-600rpm, the temperature of purple-black viscous liquid is raised to 30°C-50°C, and the temperature is 30°C-50°C, and heated for 15min-60min to obtain purple-black viscous liquid For slurry, under the conditions of water bath and stirring speed of 300rpm-600rpm, first raise the temperature of the purple-black viscous slurry to 45°C-55°C and add deionized water A, then raise the temperature to 65°C-75°C and add deionized water B ...

specific Embodiment approach 3

[0063] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the mass ratio of described flake graphite to the concentrated sulfuric acid is 1g:(15~30) mL; Described flake graphite and The mass ratio of potassium permanganate is 1:(5~8); the quality of described flake graphite and the volume ratio of deionized water A are 1g:(20~40) mL; the quality of described flake graphite and deionized water A The volume ratio of ionized water B is 1g:(30~60)mL; the volume ratio of the mass of described flake graphite to distilled water is 1g:(60~80)mL; the mass and mass percentage of described flake graphite is 3 The volume ratio of %-10% hydrogen peroxide is 1g:(30-60) mL; the mass percentage of the concentrated sulfuric acid is 98%. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a high-efficiency and environment-friendly graphene-paraffin phase change microcapsule material, and relates to a preparation method of a graphene-paraffin phase change microcapsule material. The problems of low yield, high pollution and low production efficiency in the existing graphene-paraffin phase change microcapsule material production process are solved. The preparation method comprises the following steps: 1, preparing a graphene oxide dispersion liquid; 2, adjusting the pH value; 3, adding solid paraffin; 4, adding L-ascorbic acid; 5, cooling; and 6, carrying out suction filtration, washing and drying in the shade. The method is used for preparing the high-efficiency and environment-friendly graphene-paraffin phase change microcapsule material.

Description

technical field [0001] The invention relates to a preparation method of a graphene-paraffin phase change microcapsule material. Background technique [0002] With the development of society and the improvement of productivity, energy has become an important factor related to national development and human progress. Thermal energy can be stored and transported, but most of it is difficult to use efficiently. Storing excess thermal energy and releasing it when there is a large demand for thermal energy is an effective way to improve energy utilization. Phase change materials are materials that can absorb and release a large amount of heat through their own physical state changes. Phase change materials have a strong heat storage capacity, among which organic phase change materials have the advantages of high latent heat of phase change and low corrosion, and have a wide range of applications, but are limited by the low thermal conductivity of the material itself and the high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02C09K5/06
CPCB01J13/02C09K5/063
Inventor 矫维成金浩正郭红缘
Owner HARBIN INST OF TECH
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