Nano zirconium carbide modified paraffin phase change microcapsules and preparation method thereof

A technology of nano-zirconium carbide and phase-change microcapsules, which can be used in microcapsule preparations, microsphere preparation, chemical instruments and methods, etc., and can solve the problems of poor thermal conductivity and poor light absorption capacity.

Inactive Publication Date: 2019-10-18
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a zirconium carbide modified microcapsule for the existing paraffin wax phase change microcapsules and the technical problems of poor thermal conductivity and poor light absorption capacity of the wall material in the preparation process, which lead to the light utilization rate of the phase change microcapsules. Paraffin phase-change microcapsules and a preparation method thereof, the modified paraffin phase-change microcapsules of the present invention not only enhance thermal conductivity, but also improve the utilization rate of the microcapsules to solar radiation

Method used

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  • Nano zirconium carbide modified paraffin phase change microcapsules and preparation method thereof
  • Nano zirconium carbide modified paraffin phase change microcapsules and preparation method thereof
  • Nano zirconium carbide modified paraffin phase change microcapsules and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0105] 1. Preparation of silane coupling agent solution

[0106] In a stirring state, the silane coupling agent KH550 is added to a concentration of 90wt% ethanol solution (concentration is usually 80-90wt%), stirring and mixing, the stirring speed is 300-400rpm; the stirring time is 30min (usually 20-40min ), until the solution is clear and transparent, the KH550 hydrolyzate (i.e. the silane coupling agent solution) is prepared for subsequent use, wherein the mass ratio of the silane coupling agent KH550 to the ethanol solution is 25:100 (usually (15-30):100) , that is, the mass concentration of the silane coupling agent solution is 20% (usually 15%-30%).

[0107] The silane coupling agent solution in the embodiment of the present invention is illustrated by taking the KH550 hydrolyzed solution with a concentration of 20% as an example, and other silane coupling agent solutions with a concentration of 15-30% are applicable to the present invention.

[0108] The silane coupli...

Embodiment 2

[0138] 1. Preparation of silane coupling agent solution

[0139] Same as Example 1.

[0140] 2. Hydrophobic treatment of nano zirconium carbide

[0141] Same as Example 1.

[0142] 3. Preparation of hydrophobically modified nano zirconium carbide dispersion

[0143] Except adding 0.6g hydrophobically modified nano-zirconium carbide powder to 20g deionized water to prepare a hydrophobically-modified nano-zirconium carbide-water dispersion (20.6g) with a concentration of 3wt%, the others were the same as in Example 1.

[0144] 4. Preparation of Nano Zirconium Carbide / Paraffin Pickering Emulsion

[0145] In addition to adding 20.6g hydrophobically modified nano-zirconium carbide-water dispersion to the paraffin-emulsifier mixed solution, a stable and uniform nano-zirconium carbide / paraffin Pickering emulsion (59.6g) was obtained, wherein the nano-zirconium carbide / paraffin Pickering emulsion modified Except that the mass ratio of zirconium carbide to paraffin is 3:100 (usuall...

Embodiment 3

[0151] 1. Preparation of silane coupling agent solution

[0152] Same as Example 1.

[0153] 2. Hydrophobic treatment of nano zirconium carbide

[0154] Same as Example 1

[0155] 3. Preparation of hydrophobically modified nano zirconium carbide dispersion

[0156] Except adding 0.4g hydrophobically modified nano-zirconium carbide powder to 20g deionized water to prepare a hydrophobically-modified nano-zirconium carbide-water dispersion (20.4g) with a concentration of 2wt%, all the others were the same as in Example 1.

[0157] 4. Preparation of Nano Zirconium Carbide / Paraffin Pickering Emulsion

[0158] In addition to adding 20.4g hydrophobically modified nano-zirconium carbide-water dispersion to the paraffin-emulsifier mixed solution, the hydrophobically modified nano-zirconium carbide in the hydrophobically modified nano-zirconium carbide-water dispersion and the paraffin wax in the paraffin-emulsifier mixed solution The mass ratio of the nanometer zirconium carbide / pa...

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Abstract

The invention discloses a preparation method of nano zirconium carbide modified paraffin phase change microcapsules. The method comprises the following steps: performing hydrophobic modification treatment on zirconium carbide, and dispersing the hydrophobic modified zirconium carbide into water to obtain a hydrophobic modified nano zirconium carbide-water dispersion liquid; mixing paraffin, an emulsifying agent, the hydrophobic modified nano zirconium carbide-water dispersion liquid and a dispersant, and performing emulsification treatment to prepare a zirconium carbide / paraffin Pickering emulsion; and mixing the zirconium carbide / paraffin Pickering emulsion and a melamine-urea-formaldehyde prepolymer, and performing curing treatment. According to the method provided by the invention, in the nano zirconium carbide modified paraffin phase change microcapsules prepared by the method, the nano zirconium carbide is used as a reinforcing material and present in a wall material of the microcapsules, so that the thermal conductivity and photothermal conversion performance of the paraffin phase change microcapsules are significantly improved.

Description

technical field [0001] The invention belongs to the technical field of functional phase-change energy storage materials, and in particular relates to a preparation method of nano-zirconium carbide modified paraffin phase-change microcapsules. Background technique [0002] Phase change materials are materials that can store and release a large amount of latent heat by melting or solidifying at a certain temperature, and are often used in thermal energy storage and thermal regulation systems. Applying phase change materials to solar heat collection systems can greatly reduce the use of fossil energy and reduce greenhouse gas emissions. At the same time, it can also solve the problem of discontinuous energy supply of solar energy in application. However, phase change materials often have problems such as large volume changes and easy leakage during the phase transition process. The use of microcapsule encapsulation technology can effectively improve this shortcoming. [0003]...

Claims

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Application Information

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IPC IPC(8): C09K5/06B01J13/16
CPCB01J13/16C09K5/063
Inventor 方健张喆刘旭静孙一凡席丽敏
Owner BEIJING FORESTRY UNIVERSITY
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