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N-tetradecanol phase change microcapsule and preparation method thereof

A phase-change microcapsule, n-tetradecanol technology, applied in microcapsule preparation, microsphere preparation and other directions, can solve the problems of slow heat transfer, poor temperature resistance of wall materials, etc., and achieves large latent heat, production safety, and low production cost. Effect

Inactive Publication Date: 2015-04-29
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, phase change materials also have some disadvantages after being microencapsulated, such as slow heat transfer, poor temperature resistance of wall materials, etc.

Method used

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  • N-tetradecanol phase change microcapsule and preparation method thereof
  • N-tetradecanol phase change microcapsule and preparation method thereof
  • N-tetradecanol phase change microcapsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] (1) Preparation of the water phase: the sodium chloride of 20g is dissolved in the deionized water of 100g, the 1% sodium nitrite aqueous solution of 1g and the 1% methyl cellulose aqueous solution of 1g are added, then the 25% colloidal dihydrogen of 10g is added Silicon oxide aqueous solution, and then add 9% hydrochloric acid aqueous solution to adjust the pH value of the solution to 4, adjust the temperature to 40° C., and stir at a speed of 500 rpm until a uniform aqueous solution is formed.

[0066] (2) Preparation of the oil phase: mix 15g of molten n-tetradecyl alcohol with 6g of acrylonitrile, 3.5g of butyl acrylate, 0.5g of methacrylic acid, 0.12g of benzoyl peroxide and 0.2g of trimethylolpropane trimethyl Base acrylate mixed, ultrasonic 5min, to get a homogeneous oil phase.

[0067] (3) Preparation of phase-change microcapsules: Slowly drop the oil phase into the water phase, keep the temperature at 40°C, and homogenize at a speed of 1200rpm for 30min, so th...

Embodiment 2

[0069] (1) Preparation of the water phase: the sodium chloride of 20g is dissolved in the deionized water of 100g, the 1% sodium nitrite aqueous solution of 1g and the 1% methyl cellulose aqueous solution of 1g are added, then the 25% colloidal dihydrogen of 10g is added Silicon oxide aqueous solution, and then add 9% hydrochloric acid aqueous solution to adjust the pH value of the solution to 4, adjust the temperature to 40° C., and stir at a speed of 500 rpm until a uniform aqueous solution is formed.

[0070] (2) Preparation of oil phase: mix 18g of molten n-tetradecyl alcohol with 7g of acrylonitrile, 2.5g of butyl acrylate, 0.5g of methacrylic acid, 0.12g of azobisisobutyronitrile and 0.2g of trimethylolpropane Methacrylates were mixed and ultrasonicated for 5 minutes to obtain a homogeneous oil phase.

[0071] (3) Preparation of phase-change microcapsules: Slowly drop the oil phase into the water phase, keep the temperature at 40°C, and homogenize at a speed of 1200rpm f...

Embodiment 3～10

[0073] Except changing the type and amount of monomers used, crosslinking agents, initiators and the amount of core material and polymerization temperature (see Table 1 for details), other conditions are the same as in Example 1, and different phase change microcapsules are prepared. The properties are shown in Table 2.

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Abstract

The invention discloses an n-tetradecanol phase change microcapsule. The n-tetradecanol phase change microcapsule comprises a polymer shell and an n-tetradecanol core material wrapped in the shell and is prepared by a suspension polymerization method, wherein the polymer shell is obtained by polymerizing monomers in the presence of an initiator and the monomers comprise nitrile, (meth)acrylate and carboxyl-containing monomers. According to the n-tetradecanol phase change microcapsule, nitrile monomers are introduced in the polymer shell so that the temperature resistance of the phase change microcapsule is improved and the application range of the phase change microcapsule is expanded; in addition, since the nitrile monomers has better film-forming property, the phase change microcapsule prepared from the nitrile monomers has better permeability resistance and the leakage of the phase change material can effectively prevented. The phase change microcapsule disclosed by the invention can have wide application prospects in such fields as textile, construction and paints. Since the monomers are free of formaldehyde, the production is safer and more conducive to environmental friendliness and human health.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of n-tetradecyl alcohol phase change microcapsules. Background technique [0002] Phase change materials refer to substances that change their physical state and provide latent heat with temperature changes. As a very effective energy storage material, it can absorb or release a large amount of latent heat when a substance undergoes a phase change. Energy is the basis for human survival and development. With the rapid development of the times, the energy crisis is becoming more and more serious. Therefore, saving energy, controlling energy consumption and developing new energy have become the focus of social attention. Phase change materials have attracted more and more attention due to their high heat storage capacity and recyclable properties. [0003] Phase-change microcapsules use microencapsulation technology to encapsulate phase-change materials so that the phase-change materi...

Claims

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Application Information

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IPC IPC(8): C08F220/44C08F220/42C08F220/18C08F220/06C08F222/14C08F2/18C08K5/05B01J13/14
Inventor 孙伟贤刘峰杨洪梅陈宝生刘兆吉高英罗颖喻国聪张玉军
Owner EAST CHINA UNIV OF SCI & TECH
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