A kind of preparation method of carbon nanotube/paraffin microcapsule with light-absorbing performance

A paraffin microcapsule, carbon nanotube technology, applied in microcapsule preparations, microsphere preparation, chemical instruments and methods, etc., can solve the problems of heat storage and temperature control performance and application space limitations, and improve heat storage and release. Efficiency, improve emulsion stability, increase the effect of thermal conductivity

Inactive Publication Date: 2019-02-26
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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  • A kind of preparation method of carbon nanotube/paraffin microcapsule with light-absorbing performance
  • A kind of preparation method of carbon nanotube/paraffin microcapsule with light-absorbing performance
  • A kind of preparation method of carbon nanotube/paraffin microcapsule with light-absorbing performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of compound paraffin wax:

[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 into the beaker and continue to stir for 30min to obtain 60g of compound wax sample.

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

[0041] Accurately weigh, 26.2856 g of glycolamine and 25 mL of methanol in a 250 mL three-necked flask equipped with a thermometer and a magnetic stirring device, and stir at room temperature. After the glycol amine is completely dissolved, slowly add 21.5230g methyl acrylate dropwise, heat to 40℃, stir with constant temperature magnetic force for 4h, then distill under reduced pressure to remove the methanol to obtain a colorless transparent solution DEAM(N,N-dihydroxyethyl) Methyl-3-amine acrylate). Then, 0.25 g of p-toluenesulfonic acid and 0.25 g of pentaerythritol were added to the system, the temperature was rais...

Embodiment 2

[0054] The mass ratio of the compound paraffin wax, TAPP, M 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 (M WCNTs-HBP), distilled water, urea, melamine, and 37% formaldehyde solution in mass fraction is 0.01:50:1:2:10. The other steps are the same as in Example 1.

Embodiment 3

[0057] The mass ratio of the compound paraffin wax, TAPP, M 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 (M WCNTs-HBP), distilled water, urea, melamine, and 37% formaldehyde solution by mass is 0.02:50:3:5:15. The other steps are the same as in Example 1.

[0059] The microcapsules shown in Table 1 were prepared under 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 polyhydroxy polyurethane. 3380cm -1 The stretch vibration absorption peak of O-H bond at 2950cm -1 There is the stretching vibration absorption peak of -CH3 and -CH2, 1730cm -1 Is the stretching vibration absorption peak of the C=O bond in the ester group, 1620cm -1 It is the absorption peak of -OH bending vibration, 1440~1200cm -1 The C-H bond bending vibration and the C-O,...

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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 core-shell structure, in particular to a method for preparing carbon nanotube / paraffin microcapsules with light absorption 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 to 1000 / μm, and can take various forms, such as spherical, grain-shaped, and amorphous. The preparation methods of microcapsules mainly include in-situ polymerization, interfacial polymerization, and suspension polymerization. [0003] In-situ polymerization means that during the encapsulation process, the reacting monomers and catalysts are all located inside or outside the phase change material emulsion droplets, and the monomers are soluble in the continuous phase of the microcapsule system. The prepolymers of the reactive monomers polymerize on the surface of the emulsified droplets to produce insolubl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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