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N-tetradecyl alcohol phase-change microcapsule and preparation method thereof

A technology of phase-change microcapsules and n-tetradecyl alcohol, which is applied in the field of polymer composite material preparation, can solve the problems of easy agglomeration of emulsions, difficult microencapsulation, and difficult emulsification, and achieves good water resistance, uniform particle size, and high water resistance. The effect of organic solvents

Inactive Publication Date: 2012-04-18
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0003] N-tetradecyl alcohol is a phase change material with high latent heat of phase change, but because its molecule is a linear structure and contains polar hydroxyl groups, it has always had problems such as difficult emulsification and easy agglomeration of emulsions, making it difficult to Microencapsulation

Method used

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  • N-tetradecyl alcohol phase-change microcapsule and preparation method thereof
  • N-tetradecyl alcohol phase-change microcapsule and preparation method thereof
  • N-tetradecyl alcohol phase-change microcapsule and preparation method thereof

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preparation example Construction

[0032] The preparation method of n-tetradecyl alcohol phase-change microcapsules, carries out batching according to above-mentioned components and proportioning thereof, and its steps are:

[0033] The preparation steps of n-tetradecyl alcohol emulsion are:

[0034] (1) Add the styrene-maleic anhydride copolymer resin, sodium hydroxide and emulsifier into the deionized water, mix, heat in a water bath at 60°C, stir evenly to obtain the styrene-maleic anhydride copolymer resin sodium salt solution, Then use 10% citric acid aqueous solution to adjust the pH=4 to 5 to make an emulsifier aqueous solution for subsequent use;

[0035] (2) n-tetradecyl alcohol is added in the emulsification reactor, heated and melted;

[0036] (3) At a stirring speed of 1000r / min, divide the emulsifier aqueous solution into 5 parts and add them to the emulsification reaction kettle in batches, with an interval of 5 minutes each time. After the last batch of emulsifier aqueous solution is added, dire...

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Abstract

The invention provides n-tetradecyl alcohol phase-change microcapsule and a preparation method thereof. According to the invention, a melamine-formaldehyde resin is used as a wall material, n-tetradecyl alcohol is used as a core material, and an emulsification method of combined liquid crystalline phase emulsification method of microemulsion and phase inversion temperature method is utilized to prepare n-tetradecyl alcohol emulsion; prepared melamine-formaldehyde performed polymers and n-tetradecyl alcohol emulsion are utilized to prepare the n-tetradecyl alcohol phase-change microcapsule by using in situ polymerization. The n-tetradecyl alcohol phase-change microcapsule has the advantages of no residual formaldehyde, an uniform particle size, great latent heat of phase change, resistance to organic solvents and good water resistance, and is easy to blend with cement concrete and a variety of resins to form composite high-molecular phase-change materials with more excellent performance.

Description

technical field [0001] The invention relates to the preparation of polymer composite materials. Background technique [0002] Phase change microcapsule material is a new type of composite phase change material with a core-shell structure formed by coating a layer of stable polymer film on the surface of solid-liquid phase change material particles using microcapsule technology. During the phase change process of phase change microcapsule materials, the phase change material as the inner core undergoes a solid-liquid phase transition, while the polymer film on the outer layer remains solid, so this type of phase change material will always be solid particles macroscopically. . The heat-absorbing and exothermic functions of the phase-change microcapsules can keep their temperature relatively constant within a certain period of time, thus playing the role of "temperature control". [0003] N-tetradecyl alcohol is a phase change material with high latent heat of phase change, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/18
Inventor 郭军红马永强杨保平周应萍崔锦峰李延华刘永亮李军
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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