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Preparation method of nano particle-doped phase change microcapsule

A technology of phase change microcapsules and nanoparticles, which can be used in microcapsule preparations, microsphere preparation, chemical instruments and methods, etc., and can solve the problems of single function of phase change materials.

Inactive Publication Date: 2015-10-07
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of phase-change microcapsules doped with nanoparticles, by doping nano-powders in the microcapsule core material, to prepare microcapsules with excellent mechanical, thermal, electrical, magnetic or optical properties Phase change materials to solve the problem of single function of existing nanocapsule phase change materials

Method used

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  • Preparation method of nano particle-doped phase change microcapsule
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  • Preparation method of nano particle-doped phase change microcapsule

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Step 1, nanomaterial surface treatment:

[0036] After diluting 5.2g of dodecyltrimethylsiloxane with 100mL ethanol solvent, adjust its pH value to 4 with 10% acetic acid solution, and stir at room temperature for 10min to obtain a surface treatment agent solution; take 6mL surface treatment agent solution Add it to 6g of P25 nano-titanium dioxide, stir and react for 20 minutes, heat up to 50°C, keep warm for 20 minutes, filter the product, dry it in an oven at 60°C, cool and grind it to get the treated P25 nano-titanium dioxide powder, spare;

[0037] Step 2, preparation of capsule wall material:

[0038] Mix 5.62g of melamine and 5.06mL of formaldehyde with a mass concentration of 37%, stir and react at 70°C for 30min to become a clear liquid, lower it to room temperature to obtain a prepolymer, and set aside;

[0039] Step 3, nanomaterial doping:

[0040] Place 30g of n-hexadecane in a water bath at 50°C, heat and stir to melt it, take 3g of the sodium salt of pol...

Embodiment 2

[0047] Step 1, nanomaterial surface treatment:

[0048] After diluting 12g of dodecyltrimethylsiloxane with 100mL of ethanol solvent, adjust its pH value to 4.5 with 10% acetic acid solution, and stir at room temperature for 10min to obtain a surface treatment agent solution; take 30mL of the surface treatment agent solution and add Add 6g of P25 nano-titanium dioxide, stir and react for 20 minutes, heat up to 55°C, keep warm for 20 minutes, filter the product, dry it in an oven at 63°C, cool and grind to obtain the treated P25 nano-titanium dioxide powder, set aside ;

[0049] Step 2, preparation of capsule wall material:

[0050] Mix 8.12g of melamine and 10.46mL of formaldehyde with a mass concentration of 37%, stir and react at 70°C for 30min to become a clear liquid, lower it to room temperature to obtain a prepolymer, and set aside;

[0051] Step 3, nanomaterial doping:

[0052] Place 30g of n-hexadecane in a water bath at 50°C, heat and stir to melt it, take 5g of sodi...

Embodiment 3

[0059] Step 1, nanomaterial surface treatment:

[0060] Dilute 25g of octyltrimethoxysilane with 100mL of methanol solvent, adjust its pH value to 5 with 10% acetic acid solution, and stir at room temperature for 10min to obtain a surface treatment agent solution; take 60mL of the surface treatment agent solution and add it to 6g of P25 nano In titanium dioxide, after stirring and reacting for 20 minutes, the temperature was raised to 60° C., and the heat preservation reaction was carried out for 20 minutes. After the product was suction-filtered, it was placed in an oven at 65° C. for drying, and after cooling and grinding, the processed P25 nano-titanium dioxide powder was obtained, which was set aside;

[0061] Step 2, preparation of capsule wall material:

[0062] Mix 2.35g of melamine and 7.6mL of formaldehyde with a mass concentration of 37%, stir and react at 70°C for 50min to become a clear liquid, lower it to room temperature to obtain a prepolymer, and set aside;

...

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Abstract

The invention discloses a preparation method of a nano particle-doped phase change microcapsule. The preparation method comprises following steps: a nano material is subjected to surface treatment, and then is added into a core material after surface treatment so as to obtain a composite nano core material emulsion; a prepared prepolymer capsule wall material is added into the nano core material emulsion so as to obtain a capsule suspension liquid loaded with the nano material; and the capsule suspension liquid is subjected to filtering, washing, drying, and grinding so as to obtain nano particle-doped phase change microcapsule powder. According to the preparation method, the functional nano material is subjected to pretreatment, and then is doped into a shell material or the core material of the microcapsule, so that synergistic effects with a phase change material in the microcapsule are achieved; and loading amount of the nano particle on different parts of the microcapsule is controlled by controlling surface energy of the nano material, and further more nano composite phase change material microcapsules with a plurality of functions (heat functions, optical functions, magnetic functions, and electric function) are prepared.

Description

technical field [0001] The invention belongs to the technical field of phase change materials, and in particular relates to a preparation method of phase change microcapsules doped with nanoparticles. Background technique [0002] Energy shortage and environmental issues have always attracted the attention of all walks of life. Energy conservation and environmental protection, and improvement of energy utilization efficiency have become the focus of research and development of energy workers in various countries. Latent heat storage technology is particularly attractive in terms of energy utilization. As a high-efficiency latent heat energy storage medium, phase change materials (PCM) can absorb heat (cold) from the environment or release it to the environment during the phase change process. Heat (cold) amount, so as to achieve the purpose of energy storage and release. [0003] In recent years, a new trend has emerged in the research field of phase change energy storage m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/04
Inventor 宋庆文王进美高晓晓任欢欢徐德斌
Owner XI'AN POLYTECHNIC UNIVERSITY
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