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Preparation method of carbon nanotube/paraffin microcapsule with light absorption performance

A technology of paraffin microcapsules and carbon nanotubes, applied in the direction of microcapsule preparation, microsphere preparation, chemical instruments and methods, etc., can solve the problems of heat storage and temperature control performance and application space limitations, and achieve improved heat storage and release Efficiency, improvement of emulsion stability, effect of increasing thermal conductivity

Inactive Publication Date: 2017-05-31
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a preparation method of carbon nanotube / paraffin microcapsules with light-absorbing properties, which solves the problem of certain limitations in heat storage and temperature control performance and application space in the prior art

Method used

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  • Preparation method of carbon nanotube/paraffin microcapsule with light absorption performance
  • Preparation method of carbon nanotube/paraffin microcapsule with light absorption performance
  • Preparation method of carbon nanotube/paraffin microcapsule with light absorption performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of compound paraffin:

[0039]Weigh 16.2g of 46# solid paraffin and 37.8g of liquid paraffin in a 100ml beaker, stir in a water bath at 70°C for 30min, then weigh 6g of microcrystalline wax in the beaker, and continue stirring for 30min to obtain 60g of compound wax sample.

[0040] Hyperbranched multi-walled carbon nanotubes (WCNTs-HBP):

[0041] Accurately weigh 26.2856g (0.25mol) of ethylene glycol amine and 25ml of methanol in a 250ml three-necked flask equipped with a thermometer and a magnetic stirring device, and stir at room temperature. After the ethylene glycol amine is completely dissolved, slowly add 21.5230g (0.25mol) of methyl acrylate dropwise, raise the temperature to 40°C, stir with a constant temperature magnetic force for 4h, and then distill off the methanol under reduced pressure to obtain a colorless and transparent solution DEAM (N,N - Dihydroxyethyl-3-amine methyl acrylate). Then add 0.25g of p-toluenesulfonic acid and 0.25g of pen...

Embodiment 2

[0054] The mass ratio of the compounded paraffin, TAPP, WCNTs, OP-10 emulsifier and distilled water is 6:0.01:0.003:0.2:40.

[0055] The mass ratio of the hyperbranched multi-walled carbon nanotubes (WCNTs-HBP), distilled water, urea, melamine, and 37% formaldehyde solution is 0.01:50:1:2:10. Other steps are the same as in Example 1.

Embodiment 3

[0057] The mass ratio of the compounded paraffin, TAPP, WCNTs, OP-10 emulsifier and distilled water is 8:0.02:0.008:0.5:40.

[0058] The mass ratio of the hyperbranched multi-walled carbon nanotubes (WCNTs-HBP), distilled water, urea, melamine, and 37% formaldehyde solution is 0.02:50:3:5:15. Other steps are the same as in Example 1.

[0059] The microcapsules shown in Table 1 were prepared with the same experimental conditions and methods.

[0060] Results and discussion

[0061] Structural characterization of carbon nanotubes and porphyrins: figure 1 It is the infrared detection spectrum of polyhydroxypolyurethane. 3380cm -1 The stretching vibration absorption peak of the O-H bond is at 2950cm -1 is the stretching vibration absorption peak of -CH3 and -CH2, 1730cm -1 It is the stretching vibration absorption peak of the C=O bond in the ester group, 1620cm -1 The place is -OH bending vibration absorption peak, 1440~1200cm -1 The bending vibration of C-H bond and the a...

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Abstract

The invention relates to a preparation method of a carbon nanotube / paraffin microcapsule with light absorption performance. The preparation method comprises the following steps: first acidifying and grafting a carbon nanotube to obtain a polyhydroxy carbon nanotube; nitrifying and reducing tetraphenylporphyrin to obtain amino porphyrin; secondly, placing the polyhydroxy carbon nanotube in a round-bottom flask with distilled water, ultrasonically dispersing, and adding melamine, urea and a formaldehyde solution into the system to prepare a prepolymer; then adding the amino porphyrin into molten paraffin, ultrasonically dispersing, adding an emulsifier and distilled water, and preparing an emulsion; and finally mixing the prepolymer, the emulsion, sodium chloride, glacial acetic acid and a curing agent, and reacting to obtain the microcapsule. The phase change potential heat is increased, and the carbon nanotube is uniformly dispersed in the compound paraffin to increase the heat conductivity, so that the stability of the emulsion is improved; the heat conducting performance of a wall material is improved, and the heat storage and release efficiency of the microcapsule is improved; and meanwhile, the microcapsule has an obvious absorption peak in a visible light zone, and has a photosensitive property.

Description

technical field [0001] The invention relates to a phase-change material with a shell-core structure, in particular to a preparation method of a carbon nanotube / paraffin microcapsule with light-absorbing properties. Background technique [0002] Microcapsule technology is a new material preparation technology developed in the past 50 years. The size of microcapsules is generally 1-1000 / μm, and can present various shapes, such as spherical, grain-shaped, amorphous, etc. The preparation methods of microcapsules mainly include in-situ polymerization, interfacial polymerization, suspension polymerization and so on. [0003] The in-situ polymerization method means that during the encapsulation process, the reaction monomers and catalysts are all located inside or outside the emulsified droplets of the phase change material, and the monomers are soluble in the continuous phase of the microcapsule system. The prepolymer of the reactive monomer polymerizes on the surface of the emul...

Claims

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Application Information

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IPC IPC(8): B01J13/02B01J13/16C09K5/06
CPCB01J13/02B01J13/16C09K5/06
Inventor 周莉李彦庆张丽燕李怡蕙刘国洪
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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