Phase-change energy-storage composite film with sandwich structure and preparation method thereof

A sandwich structure, phase change energy storage technology, applied in the direction of chemical instruments and methods, heat exchange materials, sustainable manufacturing/processing, etc., can solve the problems of limiting the application of phase change materials, poor recyclability, easy phase separation, etc. Problems, to achieve good thermal stability and recyclability, low cost, good heat setting effect

Pending Publication Date: 2021-01-08
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the phase change material has poor recyclability and is prone to phase separation, which cannot meet the needs of practical applications.
In addition, because phase change materials are prone to leakage when solid-liquid phase transition occurs during use, this puts higher requirements on phase change composite materials, which severely limits the application of phase change materials in industry.

Method used

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  • Phase-change energy-storage composite film with sandwich structure and preparation method thereof
  • Phase-change energy-storage composite film with sandwich structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A method for preparing a phase-change energy storage composite film with a sandwich sandwich structure, comprising the following steps:

[0030] (1) Drop the polyethylene glycol methacrylate monomer of 10mmol into the graphene oxide dispersion (1mgmL -1 ), followed by the addition of nitric acid solution (1mg mL -1 ), the polymerization process was carried out at 60°C under nitrogen protection for 8h, and finally the original suspension was centrifuged and washed 5 times to remove unreacted monomer or residual homopolymer.

[0031] (2) Dissolve 1.54g of poly(ethylene-g-maleic anhydride) in toluene, add 5.41g of stearyl alcohol, stir until completely dissolved, then add p-toluenesulfonic acid as a catalyst, and react at 80°C under nitrogen protection for 8 -10h. After the reaction, the product was precipitated in distilled water and filtered to obtain a crude product. After repeated washing four times in anhydrous methanol, it was dried in a vacuum oven at 50°C to con...

Embodiment 2

[0038] Adjustment Example 1, poly(ethylene-g-maleic anhydride) stearyl alcohol and polyethylene glycol methacrylate modified graphene oxide mixed dispersion liquid is changed into 2mL drop coating volume on base film, other conditions Same as in Example 1, the properties of the prepared sandwich composite membrane are shown in Table 1.

Embodiment 3

[0040] Adjustment Example 1, poly(ethylene-g-maleic anhydride) stearyl alcohol and polyethylene glycol methacrylate modified graphene oxide mixed dispersion is changed into 3mL drop coating volume on the base film, other conditions Same as in Example 1, the properties of the prepared sandwich composite membrane are shown in Table 1.

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PUM

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Abstract

The invention provides a preparation method of a modified graphene oxide / comb-shaped polymer phase-change energy-storage composite film with a sandwich structure. The method comprises the following steps: by using polyethylene glycol monomer functionalized modified graphene oxide as an upper base membrane and a lower base membrane, introducing a comb-shaped polymer phase-change material in the form of a sheet-shaped embedded structure; and dispersing a part of modified graphene oxide into a comb-shaped polymer solution and fixing the powdery comb-shaped polymer in a modified graphene self-assembly film in a manner of dispensing, so that a composite film with a compact sandwich structure is obtained. The sheet-shaped embedded structure not only enhances the interface bonding strength between layers, but also strengthens the interface interaction between the layers. In addition, the introduction of the phase change material endows the composite material with thermal storage characteristics. The process is simple to operate, low in cost and controllable in layer number and thickness, is an environment-friendly and energy-saving production process, and is very wide in application range.

Description

technical field [0001] The invention relates to the field of phase change materials, in particular to preparing a modified graphene oxide / comb polymer phase change energy storage composite film with a sandwich sandwich structure by using self-assembly technology. Background technique [0002] Comb-like polymer phase change materials use comb-like polymers as structural units, and realize the phase-change functionalization of polymers by changing the type of side chains. Comb polymer phase change materials, as a new type of organic energy storage materials, have attracted widespread attention due to their high enthalpy, stable thermal properties and solid-liquid phase transition characteristics. [0003] Self-assembly is generally a process in which non-covalent bonds such as hydrogen bonds, electrostatic forces, and van der Waals forces are used as driving forces to form ordered assemblies of structural units. For graphene oxide, the existence of a large number of conjugate...

Claims

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Application Information

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IPC IPC(8): C08J5/18C09K5/06C08L23/26C08L33/20C08K9/04C08K9/02C08K3/04
CPCC08J5/18C09K5/063C08J2323/26C08J2333/20C08K9/08C08K9/02C08K3/042Y02P20/10
Inventor 石海峰钱彭华毛慧琴
Owner TIANJIN POLYTECHNIC UNIV
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