Preparation method of novel reticulate structure capsule wall microcapsule phase-change material

A network structure, phase change material technology, applied in microcapsule preparations, microsphere preparation, heat exchange materials, etc. Leakage, improved density and stability, less cracking effect

Inactive Publication Date: 2017-09-26
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problem that the microcapsule wall prepared by the reaction of polyisocyanate and polyamine compound has high permeability, poor stability and compactness, and cannot prevent the core material from leaking well

Method used

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  • Preparation method of novel reticulate structure capsule wall microcapsule phase-change material
  • Preparation method of novel reticulate structure capsule wall microcapsule phase-change material

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preparation example Construction

[0029] A method for preparing the phase change material of the above-mentioned novel net-like capsule wall microcapsules, characterized in that it comprises the following steps:

[0030] Step 1, weighing the capsule core component and polyisocyanate and mixing to form the first solution;

[0031] Weigh the raw materials according to the mass ratio of the polyisocyanate to the capsule core component being 0.05-0.40:1; mix the capsule core component and the polyisocyanate at a temperature 5-20°C higher than the melting point of the capsule core component to form the first a solution.

[0032] The capsule core component is aliphatic hydrocarbon or fatty acid ester compound, preferably n-tetradecane, n-octadecane or butyl stearate, the polyisocyanate is aliphatic diisocyanate, and the polyisocyanate is preferably isocyanate Phorne diisocyanate.

[0033] Step 2, configure the emulsion;

[0034] Measure the emulsifier according to the mass ratio of the emulsifier to the capsule c...

Embodiment 1

[0042] The invention relates to a new phase-change material of capsule wall microcapsule with network structure, which includes two parts of capsule core material and outer capsule wall. Its core material is n-tetradecane, its shell has a network structure, and the capsule wall is a polyurethane polymer with a network structure formed by the polymerization of dibasic isocyanate, polyamine compounds and polyol compounds. .

[0043] Wherein, polyamine compounds refer to aliphatic diamines or polyamines, preferably diethylenetriamine.

[0044] Among them, the polyol compound is a polyol containing three or more hydroxyl groups, preferably pentaerythritol containing four hydroxyl groups.

[0045] A method for preparing the phase change material of the above-mentioned novel net-like capsule wall microcapsules, characterized in that it comprises the following steps:

[0046] Step 1, weighing the capsule core component and polyisocyanate and mixing to form the first solution;

[0...

Embodiment 2

[0058] The invention relates to a new phase-change material of capsule wall microcapsule with network structure, which includes two parts of capsule core material and outer capsule wall. Its core material is n-octadecane, its shell is a network structure, and the capsule wall is a polyurethane polymer with a network structure capsule wall formed by the polymerization of dibasic isocyanate, polyamine compounds and polyol compounds. thing.

[0059] Wherein, polyamine compounds refer to aliphatic diamines or polyamines, preferably diethylenetriamine.

[0060] Among them, the polyol compound is a polyol containing three or more hydroxyl groups, preferably pentaerythritol containing four hydroxyl groups.

[0061] A method for preparing the phase change material of the above-mentioned novel net-like capsule wall microcapsules, characterized in that it comprises the following steps:

[0062] Step 1, weighing the capsule core component and polyisocyanate and mixing to form the first...

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Abstract

The invention discloses a novel reticulate structure capsule wall microcapsule phase-change material. The novel reticulate structure capsule wall microcapsule phase-change material comprises a capsule core material and an external capsule wall. The core material is a fatty hydrocarbon or fatty acid ester compound, preferably n-tetradecane, n-octadecane or butyl stearate, the shell layer adopts a reticulate structure, and the capsule wall is a polyurethane high polymer with a reticulate structure capsule wall and is formed by polymerizing diisocyanate and polyamine compounds as well as polyol compounds. The problems that the capsule wall of the microcapsule prepared through reaction of polyisocyanate and polyamine compounds has high permeability, low stability and low compactness and cannot prevent leakage of the core material well are solved. The invention also discloses a preparation method of the phase-change material. The preparation method particularly comprises the following steps: 1, weighing a capsule core component and polyisocyanate, and mixing to form a first solution; 2, preparing an emulsified liquid; 3, performing mixed reaction on the solutions prepared in the step 1 and step 2; 4, adding a water-soluble reaction monomer; 5, continuously performing temperature-increasing reaction obtained through preparation.

Description

technical field [0001] The invention belongs to the preparation technology of microcapsule phase-change energy storage materials, and relates to a preparation method of a novel net-like structure capsule wall microcapsule phase-change material. Background technique [0002] Energy is the driving force for national development, and human activities are closely related to energy. However, with the development of society, human beings' demand for energy is also increasing. In addition, human beings' energy utilization rate is generally not high, which makes the world's energy supply increasingly tense. Therefore, the development of renewable energy and new energy is imminent. Phase change materials are a very active field of research and development in energy utilization at home and abroad in recent years. Using them to absorb heat (cold) from the environment or release heat (cold) to the environment during the phase change process can effectively use energy. use. In order t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/32B01J13/14C09K5/06
CPCB01J13/14C09K5/063C08G18/3206C08G18/3228C08G18/755Y02P20/141
Inventor 陆少锋申天伟宋庆文辛成
Owner XI'AN POLYTECHNIC UNIVERSITY
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