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A composite capsule wall phase change energy storage microcapsule and its preparation method

A phase-change energy storage and microcapsule technology, which is applied in the field of preparation of phase-change energy storage microcapsules, can solve problems such as overcooling and unfavorable microcapsule popularization and application, and achieve difficult reunion, favorable production costs, and good fusion Effect

Active Publication Date: 2017-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the course of the experiment, it was found that octadecane was selected as the core material, and obvious supercooling phenomenon would occur, that is, after multiple phase transition reactions, the phase transition temperature of the core material would not return to the normal phase transition point. It is not conducive to the popularization and application of such microcapsules

Method used

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  • A composite capsule wall phase change energy storage microcapsule and its preparation method
  • A composite capsule wall phase change energy storage microcapsule and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Take 100 parts of deionized water and 0.5 parts of styrene-maleic anhydride polymer sodium salt, put them in a 500mL three-necked flask, and stir continuously at room temperature for 20min to form a uniform solution;

[0033] (2) Take 5 parts of tetraethyl orthosilicate and 250 parts of deionized water, mix and stir evenly, add 0.2mol / L dilute hydrochloric acid to adjust the pH value of the system to 2, and carry out hydrolysis reaction at 50°C to obtain a silica-containing precipitate the suspension;

[0034] (3) Weigh 1 part of cetyl palmitate, 10 parts of sodium polyacrylate and 0.1 part of organically modified carbon nanofibers with phase transition temperature and phase transition latent heat value of 50 °C and 180 kJ / kg, respectively, at 60 °C Stir and react for 30 minutes to obtain a uniformly dispersed emulsion;

[0035] (4) Add the emulsion containing the phase change material to the solution containing the sodium salt of styrene-maleic anhydride polymer, ...

Embodiment 2

[0039] In Example 1, the number of parts of sodium polyacrylate was increased to 20 parts, and other operating methods and material compositions were kept unchanged, and a phase change energy storage microcapsule B of the present invention was obtained.

Embodiment 3

[0041] In Example 1, the number of parts of tetraethyl orthosilicate was increased to 10 parts, and its operation method and material composition remained unchanged, and a kind of phase change energy storage microcapsule C of the present invention was obtained.

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Abstract

The invention relates to a composite-wall phase-change energy storing microcapsule. The microcapsule is characterized in that aliphatic ester is used as a core material, an organic-inorganic composite polymer formed by a silicon dioxide precursor and an organic polymer monomer is used as the microcapsule material. The preparation method of the composite-wall phase-change energy storing microcapsule comprises the following steps: mixing deionized water and a stabilizer to obtain a solution A; uniformly agitating the silicon dioxide precursor and deionized water; regulating pH of the system to be 1 to 5; hydrolyzing to obtain turbid liquid B; mixing and reacting the organic polymer monomer, a cross-linking agent, a phase-change material and deionized water to obtain emulsion C; adding the emulsion C to the solution A to obtain emulsion D; dropwise adding the emulsion D to the turbid liquid B; synchronously adding an initiator; performing suction filtration, washing and drying to obtain the composite-wall phase-change energy storing microcapsule. The prepared microcapsule is high in mechanical strength and pressure resistance, and can be combined well with organic and inorganic base materials.

Description

technical field [0001] The invention relates to the preparation technology of phase-change energy storage materials, in particular to a preparation method of phase-change energy storage microcapsules using organic and inorganic materials as composite wall materials. Background technique [0002] Microcapsules are micro-container units made of inorganic materials, natural or synthetic polymer materials as capsule walls and core materials using microcapsule technology. Among them, the microcapsules whose core material is a phase change material are called microcapsule phase change materials (MicroPCMs). Microcapsule phase change materials can absorb, store or release a large amount of latent heat when undergoing solid-liquid and liquid-solid phase transitions, while their own temperature remains basically unchanged. It is a good performance cycle energy storage composite material. Since it came out in the 1970s, it has been used in energy-saving building materials, heat trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/14C09K5/06
CPCB01J13/14C09K5/063
Inventor 赵亮王刚方向晨孙剑锋
Owner CHINA PETROLEUM & CHEM CORP
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