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A phase-change composite material with light-to-heat conversion function and its preparation method

A phase-change composite material and technology of phase-change materials, applied in the field of phase-change composite materials and their preparation, can solve problems such as the lack of mature reports on photothermal conversion advanced energy conversion devices and systems, and achieve excellent photothermal conversion performance and extensive Application prospect, effect of controllable heat storage capacity

Active Publication Date: 2020-09-04
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its light-to-heat conversion associated with PCMs has not been well-reported in the rational design of advanced energy conversion devices and systems for practical applications

Method used

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  • A phase-change composite material with light-to-heat conversion function and its preparation method
  • A phase-change composite material with light-to-heat conversion function and its preparation method
  • A phase-change composite material with light-to-heat conversion function and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1 Preparation of a lightweight flexible carbon foam-based phase-change composite material

[0051] The specific preparation method is as follows:

[0052] Preparation of lightweight flexible carbon foam matrix: commercial melamine foam was used as raw material, pre-oxidized and carbonized: the pre-oxidation process was at a temperature of 280°C, and the holding time was 2h; the carbonization process was at 400°C, the holding time was 0.5h, and the heating rate was 5°C / min, to obtain lightweight flexible carbon foam; the density of the resulting carbon foam matrix material is 11.7kg / m 3 , the interior of the matrix is ​​a three-dimensional porous framework connected to each other, and the pore size is 50-200 μm.

[0053] Ti 2 o 3 Nanoparticle modification: Ti 2 o 3 The nanoparticles were mixed with a Tris solution of dopamine (2 mg / mL, pH 8.5) to infiltrate the foam material, and the photothermal conversion nanoparticles Ti were deposited on the surface of ...

Embodiment 2

[0056] Example 2 Preparation of a lightweight flexible carbon foam-based phase-change composite material

[0057] The specific preparation method is as follows:

[0058] The preparation steps of the lightweight flexible carbon foam matrix are the same as in Example 1; secondly, on the basis of the lightweight flexible carbon foam, Ti 2 o 3 Nanoparticles are mixed with a Tris solution of dopamine (2 mg / mL, pH 8.5) to infiltrate the foam material, and the photothermal conversion nanoparticle Ti is deposited on the surface of the carbon foam skeleton by utilizing the excellent adhesion of polydopamine. 2 o 3 , the nanoparticle specification is the same as in Example 1; the nanoparticle Ti 2 o 3 In the mixed system with Tris solution of dopamine, the concentration of nanoparticles was adjusted to 2.5%. The reaction time of the mixed solution was adjusted to 24 hours in a constant temperature oscillating shaker, and the constant temperature was 30°C.

[0059] Finally, the sol...

Embodiment 3

[0061] Example 3 Preparation of a lightweight flexible carbon foam-based phase-change composite material

[0062] The specific preparation method is as follows:

[0063] The preparation steps of the lightweight flexible carbon foam matrix are the same as in Example 1, wherein the pre-oxidation temperature is adjusted to 260°C; secondly, on the basis of the lightweight flexible carbon foam, Ti 2 o 3 The nanoparticles were mixed with a Tris solution of dopamine (2 mg / mL, pH 8.5) to infiltrate the foam material, and the photothermal conversion nanoparticles Ti were deposited on the surface of the carbon foam skeleton by utilizing the excellent adhesion of PDA. 2 o 3 , the Ti 2 o 3 Nanoparticle specification is the same as embodiment 1; Described nanoparticle Ti 2 o 3 In the mixed system with Tris solution of dopamine, the concentration of nanoparticles was adjusted to 5%. The mixed solution was reacted in a constant temperature shaking shaker for 24 hours, and the constant...

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Abstract

The invention discloses a phase-change composite material with a photo-thermal conversion function and a preparation method thereof, and belongs to the cross field of phase-change energy storage and energy conversion. The multifunctional phase change composite material is prepared by combining Ti2O3 nano particles with a heat storage phase change material for the first time, so that a photo-thermal conversion function is expected to be provided on the basis of phase-change heat storage and temperature control functions, and the carbon foam-based phase-change composite material which is is easy to cut and process, has a controllable appearance size, has light weight and flexibility, and has photo-thermal conversion performance is provided. Due to the three-dimensional porous carbon foam matrix of the phase change composite material, the phase-change material can be stably stored, and the storage capacity can be regulated and controlled. The phase-change composite material has excellent photo-thermal conversion and temperature adjusting functions and can be used in the aspects of heat energy storage and release, thermal insulation, photo-thermal conversion, infrared stealth and infrared decoy of military equipment, and the like.

Description

technical field [0001] The invention belongs to the interdisciplinary field of phase change energy storage and energy conversion, and in particular relates to a phase change composite material with light-to-heat conversion function and a preparation method thereof. Background technique [0002] Phase change energy storage technology is a new environmentally friendly and energy-saving technology that uses phase change materials (PCM) to absorb, store and release energy. It can be applied in solar energy storage, energy-saving buildings, air conditioning systems, waste heat recovery and other fields to solve energy The contradiction of supply imbalance in time and space can also use its own phase change characteristics to achieve temperature control and other purposes, and it is used in the fields of national defense, aerospace, medicine, temperature-regulated textiles, and electronic devices. [0003] Solid-liquid phase change materials have the advantages of high energy stor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06C09K3/00F24S60/10F41H3/00
CPCC09K3/00C09K5/063F24S60/10F41H3/00Y02E10/40
Inventor 蔡以兵王委委张炜栋乔辉魏取福
Owner JIANGNAN UNIV
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