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Phase change energy storage microcapsule of composite shell and its making method

A technology of phase change energy storage and microcapsules, which is applied in the field of preparation of phase change energy storage microcapsules, phase change energy storage microcapsules and its preparation, and can solve the problems of microcapsules which are difficult to seal, crush resistance, poor mechanical and impact resistance, Poor sealing performance and other problems, to achieve the effect of improved sealing performance, good dispersion, low degree of supercooling

Inactive Publication Date: 2005-01-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ishiguro of Japan, Maohong Maeda and others (CN1161364A) have made shells that are phase-change energy-storage microcapsules of single-layer melamine resin, but the brittleness of melamine resin makes the microcapsules resistant to machinery and impact less Poor, fragile during recycling, short life
There are also people who choose materials with better flexibility than melamine resin to prepare phase change microcapsules, but this kind of microcapsules often have poor sealing properties.
According to the existing relevant technical reports, it is difficult for microcapsules with a single-layer structure to have both good sealing performance and excellent shatter resistance.

Method used

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  • Phase change energy storage microcapsule of composite shell and its making method
  • Phase change energy storage microcapsule of composite shell and its making method
  • Phase change energy storage microcapsule of composite shell and its making method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Preparation of melamine resin prepolymer A: Take 3.05g melamine, 10ml deionized water and 4.0g formaldehyde solution and stir evenly, adjust the pH value to 8.0 with 20% sodium hydroxide, and control the temperature at 70-75 °C, react for 30 minutes. Prepolymer A of melamine resin was prepared.

[0023] (2) Preparation of PEG200 modified melamine resin prepolymer B: Take 0.1527g PEG200, 10ml deionized water and 0.5g acetic acid and stir evenly, add 0.1916g melamine, the pH value of the reaction solution is 4.6-4.8, and the temperature is controlled At 90±2°C, react for 1 hour and drop to 80°C, adjust the pH value to 7.0 with 20% sodium hydroxide, add 3.0587g melamine and 4.25g, 37% formaldehyde solution, adjust the pH of the reaction solution with triethanolamine When the value reaches 8.0, the temperature is controlled at 75-80° C. to continue the reaction for 30 minutes to obtain PEG200-modified melamine resin prepolymer B.

[0024] (3) Preparation and character...

Embodiment 2

[0025] Example 2, microcapsules are prepared and characterized according to the method of Example 1, the difference is that the quality of the two resin prepolymers is different from that of Example 1, the quality of A increases by 1.1290g, and the quality of B decreases 1.1290g, the measurement results are shown in Table 1.

Embodiment 3

[0026] Example 3, microcapsules were prepared and characterized according to the method of Example 1, the difference being that in the resin prepolymer B, benzomelamine and melamine were mixed in a mass ratio of 1:19 instead of the dense one in Example 1. amine. The measurement results are shown in Table 1.

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Abstract

The invention discloses a phase change energy storage microcapsule of composite shell and its making method, wherein the core material of the microcapsule employs tetradecane, pentadecane or hexadecane, the shell layer has a composite construction, the inner layer is melamine resin, the outer layer is PEG200 modified melamine resin, or PEG200 modified melamine, or copolycondensation resin of methyl poultry manure amine, acetyl poultry manure amine or benzene substituted melamine.

Description

technical field [0001] The invention relates to a composite shell phase change energy storage microcapsule and a preparation method thereof. It belongs to the phase change energy storage microcapsule preparation technology. Background technique [0002] Phase change energy storage has been widely used in solar energy utilization, "peak shifting and valley filling" of electric power, waste heat recovery and energy saving of buildings and air conditioners. For the convenience of use, microencapsulation of phase change materials is an effective Methods. The methods of microencapsulation mainly include interfacial polymerization, in-situ polymerization, phase separation and spray drying, etc., and the microencapsulation of phase change materials is generally prepared by in-situ polymerization. Ishiguro of Japan, Maohong Maeda and others (CN1161364A) have made shells that are phase-change energy storage microcapsules of single-layer melamine resin, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/00B01J13/02
Inventor 时雨荃杜春霞赵镇南
Owner TIANJIN UNIV
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