Preparation method of carbon nanotube packaged paraffin phase-change material

A technology of carbon nanotubes and phase change materials, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., to achieve the effects of green preparation process, low equipment requirements, and simple operation.

Active Publication Date: 2016-04-20
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Preparation method of carbon nanotube packaged paraffin phase-change material
  • Preparation method of carbon nanotube packaged paraffin phase-change material
  • Preparation method of carbon nanotube packaged paraffin phase-change material

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Example Embodiment

[0020] Example 1

[0021] (1) Mix oleylamine (4 g) with paraffin (20 g, melting point 60° C.), and stir at 35° C. at a stirring speed of 100 rpm for 1 hour to obtain a binary mixture of oleylamine / paraffin.

[0022] (2) Add carbon nanotubes (2 g) into the oleylamine / paraffin binary mixture obtained in step (1), and ultrasonically disperse at 75° C. at 90 KHz for 15 minutes to obtain a reaction mixture.

[0023] (3) Heat the reaction mixture obtained in step (2) to 220°C, and stir for 2h at a stirring speed of 800 rpm, then cool the reaction mixture to room temperature naturally, add n-hexane (300mL), and disperse with 95KHz ultrasonic 5 minutes, and then centrifuged at a centrifugal rate of 12000 rpm for 5 minutes, and dried to obtain 2.10 g of the carbon nanotube-encapsulated paraffin wax phase change material.

[0024] figure 1 It is a transmission electron micrograph of the carbon nanotube-encapsulated paraffin phase change material prepared in this embodiment.

Example Embodiment

[0025] Example 2

[0026] (1) Mix oleylamine (6 g) with paraffin (20 g, melting point 60° C.) and stir at 35° C. at a stirring speed of 100 rpm for 1 hour to obtain a binary mixture of oleylamine / paraffin.

[0027] (2) Add carbon nanotubes (2 g) into the oleylamine / paraffin binary mixture obtained in step (1), and ultrasonically disperse at 75° C. at 90 KHz for 15 minutes to obtain a reaction mixture.

[0028] (3) Heat the reaction mixture obtained in step (2) to 220°C, and stir at a stirring speed of 600 rpm for 2h, then cool the reaction mixture to room temperature naturally, add n-hexane (300mL), and disperse with 95KHz ultrasonic 5min, then centrifuged at a centrifugal rate of 12000 rpm for 5min, and dried to obtain 2.15g of the carbon nanotube-encapsulated paraffin phase-change material.

[0029] figure 2 It is a transmission electron micrograph of the carbon nanotube-encapsulated paraffin phase change material prepared in this embodiment.

Example Embodiment

[0030] Example 3

[0031] (1) Mix oleylamine (5 g) with paraffin (15, melting point 60° C.) and stir at 35° C. at a stirring speed of 100 rpm for 1 hour to obtain a binary mixture of oleylamine / paraffin.

[0032] (2) Add carbon nanotubes (2 g) into the oleylamine / paraffin binary mixture obtained in step (1), and ultrasonically disperse at 75° C. at 90 KHz for 15 minutes to obtain a reaction mixture.

[0033] (3) Heat the reaction mixture obtained in step (2) to 230°C, and stir at a stirring speed of 1000 rpm for 2h, then cool the reaction mixture to room temperature naturally, add n-hexane (300mL), and disperse it by ultrasonication at 95KHz 5 minutes, and then centrifuged at a centrifugal rate of 12000 rpm for 5 minutes, and dried to obtain 2.20 g of the carbon nanotube-encapsulated paraffin phase-change material.

[0034] image 3 It is a transmission electron micrograph of the carbon nanotube-encapsulated paraffin phase change material prepared in this embodiment.

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Abstract

The invention provides a method for preparing a carbon nanotube packaged paraffin phase-change material. the preparation method comprises the following steps: mixing oleylamine and paraffin, stirring to obtain an oleylamine/paraffin binary mixture, adding carbon nanotube, carrying out ultrasonic dispersion to obtain a reaction mixture, heating the reaction mixture to 220-230 DEG C, stirring at the stirring speed of 600-1000 r/m for 2-3 h, naturally cooling the reaction mixture to room temperature, adding n-hexane, carrying out ultrasonic dispersion, centrifuging, and drying to obtain the carbon nanotube packaged paraffin phase-change material. Under high-speed stirring, oleylamine modified molten liquid paraffin enters the inner cavity of the carbon nanotube through continuous self-diffusion, and there is no need to add toxic chemical reagents such as benzene, hydrazine hydrate, etc. The preparation technology is green and environmentally friendly; operation is simple; and cost is low.

Description

(1) Technical field [0001] The invention relates to an environment-friendly method for preparing a carbon nanotube-encapsulated paraffin phase-change material, which belongs to the field of compound preparation of inorganic / organic materials. (2) Background technology [0002] Due to its high latent heat of fusion, high volume expansion near the melting point, chemical inertness, and no phase change precipitation, paraffin wax has good application prospects in phase change energy storage and driving. However, the low thermal conductivity of paraffin wax leads to a long melting time (thermal response), which limits the further development of paraffin wax in the above-mentioned fields. In order to improve the low thermal conductivity of paraffin, some scholars tried to combine nano-copper (WuShuying, ZhuDongsheng, ZhangXiurong, HuangJin. 管(WangJ,XieH,XinZ.Thermalpropertiesofparaffinbasedcompositescontainingmulti-walledcarbonnanotubes[J].ThermochimicaActa,2009,488(1-2):39-42)、膨...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 徐斌周静王博诣楼白杨
Owner ZHEJIANG UNIV OF TECH
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