A kind of polyethylene glycol/ethyl cellulose phase change microcapsule and preparation method thereof

A technology of ethyl cellulose and phase-change microcapsules, applied in chemical instruments and methods, heat exchange materials, etc., can solve problems such as difficult to degrade, fail to meet the needs of use, environmental pollution, etc., and achieve the effect of easy recycling
CN109054765BActive Publication Date: 2021-01-01NANJING FORESTRY UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING FORESTRY UNIV
Publication Date
2021-01-01

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Abstract

The invention discloses a polyethylene glycol / ethyl cellulose phase-changing microcapsule and a preparation method thereof. A core material of the phase-changing microcapsule is polyethylene glycol, awall material is ethyl cellulose, a diameter is 2 to 10 micrometers, and the phase-changing heat is 95 to 135 J / g. The preparation method adopts dichloromethane as a solvent to dissolve the polyethylene glycol and ethyl cellulose and prepares the polyethylene glycol / ethyl cellulose phase-changing microcapsule by virtue of spraying drying. The polyethylene glycol / ethyl cellulose phase-changing microcapsule novel material adopting the ethyl cellulose as a wall material does not release formaldehyde in the use process; and the ethyl cellulose is easy to degrade. Compared with other preparation methods, the spraying drying method adopting the dichloromethane as the solvent does not need additional emulsifier, is easy for recycling the dichloromethane, and is an environment-friendly preparation method. The particle size range of the polyethylene glycol / ethyl cellulose phase-changing microcapsule is 2 to 10 micrometers, the phase changing heat is 95 to 135 J / g, and the application range iswide in the preparation field of the phase-changing material.
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Description

technical field

[0001] The invention relates to the technical field of phase-change microcapsules, in particular to a polyethylene glycol / ethylcellulose phase-change microcapsule and a preparation method thereof. Background technique

[0002] As a common phase change material, polyethylene glycol has received extensive attention and research because of its wide range of phase transition temperature and high phase transition heat. However, it has disadvantages such as easy leakage during use, large volume change during phase transition, and low thermal conductivity. In view of the above shortcomings, the microcapsule technology that uses film-forming materials to coat phase change materials to form phase change microcapsules can prevent the leakage of phase change materials and contact with the external environment, control the volume change during phase change, and increase the heat transfer area. Therefore, phase change microcapsules have become the most developed type of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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