Method for preparing hollow polymer microsphere coated with phase change material

A phase change material and hollow microsphere technology, which is applied in the field of preparation of polymer hollow microspheres, can solve the problems of thermal conductivity, mechanical properties of sealing performance, and insignificant improvement of thermal stability performance, and achieves large latent heat of phase change, High coverage and good thermal stability

Active Publication Date: 2013-09-11
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, only using polymers to realize the encapsulation of phase change materials does not significantly...

Method used

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  • Method for preparing hollow polymer microsphere coated with phase change material
  • Method for preparing hollow polymer microsphere coated with phase change material

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0026] 1. Uniformly disperse the ionic surfactant cetyltrimethylammonium bromide (CTAB) in water to prepare an aqueous solution with a mass fraction of 1%, and add it dropwise to a 6% hydrophilic solution with stirring at room temperature. Sex SiO 2 In aqueous solution of nanoparticles, SiO 2 The average particle size is 40nm. The weight of CTAB accounts for the SiO 2 The mass percentage is 10%, and the reaction is stirred for 1h to obtain the modified SiO 2 Nano Hydrosol.

[0027] 2. To the above modified SiO 2 Nano hydrosol, adding acrylonitrile monomer containing a carbon-carbon double bond, the weight of acrylonitrile is SiO 2 10 times the weight of nanoparticles; then add the phase change material dodecyl alcohol, the mass of dodecyl alcohol is SiO 2 10 times the weight of nanoparticles; then adding trimethylolpropane triacrylate containing three carbon-carbon double bonds, the weight of SiO 2 5 times the weight of the nanoparticles; finally add the initiator benzo...

Embodiment 2

[0030] 1. Experimental device and operation are the same as embodiment 1, silicon dioxide (SiO2) in embodiment 1 2 ) was changed to graphene oxide (GO), the average particle size was changed from 40nm to 2nm in thickness, and the width was 800nm, the mass fraction of aqueous solution of GO nanoparticles was changed to 0.2%, and the ionic surfactant CTAB was changed to hexadecylmethyl bromide Ammonium, the mass fraction of the surfactant aqueous solution was changed from 1% to 0.5%, and the mass percentage of the surfactant accounted for the mass percentage of GO nanoparticles was changed from 10% to 40%.

[0031] 2. The experimental device and operation are the same as in Example 1, and the monomer acrylonitrile in Example 1 is changed to styrene, and the quality of styrene monomer is 15 times that of the GO nanoparticle quality; trimethylolpropane triacrylate is changed to Divinylbenzene, the mass of divinylbenzene is 8 times the mass of GO nanoparticles; the phase change mat...

Embodiment 3

[0034] 1. Experimental device and operation are the same as embodiment 1, silicon dioxide (SiO2) in embodiment 1 2 ) to titanium dioxide (TiO 2 ), the average particle size is changed from 40nm to 10nm, TiO 2 The aqueous solution mass fraction of nanoparticle is changed into 1%, and ionic surfactant CTAB is changed into sodium dodecylbenzene sulfonate, and the mass fraction of surfactant aqueous solution 1% is changed into 2%, and the mass fraction of surfactant accounts for TiO 2 The mass percentage of nanoparticles was changed from 10% to 5%.

[0035] 2. experimental apparatus and operation are the same as embodiment 1, the monomer acrylonitrile in embodiment 1 is changed into the mixture of acrylonitrile and methyl acrylate, quality is TiO 2 20 times the mass of nanoparticles; trimethylolpropane triacrylate was changed to dipropylene glycol diacrylate, mass TiO 2 10 times the mass of nanoparticles; the phase change material lauryl alcohol is changed to octadecanoic acid,...

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Abstract

The invention belongs to the technical field of preparation of phase change materials and microcapsules, and specifically relates to a method for preparing a hollow polymer microsphere coated with a phase change material. The method comprises the following steps of: performing surface modification on hydrophilic inorganic nanoparticles by an ionic surfactant, and adding the phase change material and monomers to the modified inorganic nanoparticles, which are taken as a stabilizer, to prepare the hollow polymer microsphere coated with the phase change material through a Pickering suspension polymerization method. The preparation process is simple, the raw materials are cheap and easily available, the inner wall of the prepared hollow polymer microsphere is made from polymers, the outer layer of the prepared hollow polymer microsphere is made from the inorganic nanoparticles, and the organic phase change material is coated inside the prepared hollow polymer microsphere. The prepared microsphere has a small size, the coating rate of the phase change material is high, and the outer inorganic nanoparticle layer enhances thermal stability, heat transfer efficiency, sealing performance and mechanical properties of the microsphere.

Description

technical field [0001] The invention belongs to the technical field of phase change materials and microcapsule encapsulation, and in particular relates to a preparation method of polymer hollow microspheres for coating phase change materials. Background technique [0002] Phase change material (PCM, short for phase change material) refers to a substance that can undergo a phase change within a narrow temperature range, and release or absorb a large amount of energy in the form of latent heat during the phase change process. The research on phase change materials first started in 1949, but until the 1970s, due to the increasingly serious energy crisis, phase change materials received more and more attention, and they were widely used in the field of energy storage, such as Solar energy storage, smart fabrics, temperature-regulated buildings, and more. [0003] An ideal phase change material should have the advantages of high latent heat capacity, high heat storage density, s...

Claims

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Application Information

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IPC IPC(8): B01J13/02C09K5/06
Inventor 张毅王海涛杜强国
Owner FUDAN UNIV
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