Unlock instant, AI-driven research and patent intelligence for your innovation.

Photoelectric driving cellulose-based flexible phase change material and preparation method thereof

A technology of phase change materials and cellulose, which is applied in the field of photoelectrically driven cellulose-based flexible phase change materials and its preparation, can solve the problems of low electrical conductivity, limited application range of PCM, poor photothermal conversion efficiency of PCM, etc., and achieve repeated use High performance, improve the efficiency of light and heat utilization, and improve the effect of energy utilization

Pending Publication Date: 2022-03-22
SUZHOU UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these PCMs have poor light-to-heat conversion efficiency and low conductivity, and the application range of PCMs is limited.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Photoelectric driving cellulose-based flexible phase change material and preparation method thereof
  • Photoelectric driving cellulose-based flexible phase change material and preparation method thereof
  • Photoelectric driving cellulose-based flexible phase change material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This implementation provides a method for preparing a heat storage composite material, the steps are as follows:

[0032] (1): 5g of aminated cellulose nanocrystals (CNC-NH 2 ) and 5g deionized water and 0.6g carboxylated carbon nanotubes are mixed evenly, and 5g octadecane is slowly added dropwise under mechanical shock to obtain an oil-in-water high internal phase emulsion;

[0033] (2): Add 0.1g cross-linking agent (hexamethylene isocyanate) and 0.01g catalyst dibutyltin dilaurate to the above-mentioned oil-in-water high internal phase emulsion, and mix rapidly, then the emulsion is introduced into the mould, at 60 The polymerization was heated at ℃ for 4 hours, and finally a flexible phase change material driven by light or electricity (sample 1) was obtained.

Embodiment 2

[0035] This implementation provides a method for preparing a heat storage composite material, the steps are as follows:

[0036] (1): Mix 5g of nanocellulose (CNF), 5g of deionized water and 0.6g of MXene evenly, and slowly add 5g of hexadecane dropwise under mechanical shaking to obtain an oil-in-water high internal phase emulsion;

[0037] (2): Add 0.1g cross-linking agent (aziridine modified isocyanate) and 0.01g catalyst dibutyltin dilaurate to the above-mentioned oil-in-water high internal phase emulsion, and mix rapidly, then the emulsion is introduced into the mould, Heated and polymerized at 60°C for 4 hours to finally obtain a flexible phase-change material driven by light or electricity.

Embodiment 3

[0039] This implementation provides a method for preparing a heat storage composite material, the steps are as follows:

[0040] (1): Mix 5g cotton-sulfonated nanocellulose, 5g deionized water and 0.6g graphene oxide evenly, and slowly add 5g octadecane dropwise under mechanical vibration to obtain an oil-in-water high internal phase emulsion;

[0041] (2): Add 0.1g cross-linking agent (hexamethylene isocyanate) and 0.01g catalyst dibutyltin dilaurate to the above-mentioned oil-in-water high internal phase emulsion, and mix rapidly, then the emulsion is introduced into the mould, at 60 Heating and polymerizing at ℃ for 4h, and finally obtaining a flexible phase change material actuated by light or electricity.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
heat storage densityaaaaaaaaaa
angleaaaaaaaaaa
photothermal conversion efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention provides a photoelectric driving cellulose-based flexible phase change material and a preparation method thereof, and the preparation method comprises the following steps: mixing and stirring a dispersed phase and a continuous phase to obtain an oil-in-water high internal phase emulsion, the dispersed phase being an organic phase change material; the continuous phase includes cellulose particles, water, and a conductive material. And adding a cross-linking agent and a catalyst into the oil-in-water high internal phase emulsion, carrying out an interface reaction, heating, polymerizing and drying to obtain the photo-driven or electrically-driven flexible phase change material. The heat storage material has light or electric drive heat storage and can convert light energy into heat energy, the photo-thermal conversion efficiency is as high as 90%, electric energy can be converted into heat energy under the applied current, the heat storage density is as high as 218.3 J / g, and the material has good flexibility and can be bent and folded at room temperature, has hydrophobicity and cannot absorb moisture in air to deliquesce.

Description

technical field [0001] The invention belongs to the technical field of heat storage composite material preparation, in particular to a photoelectrically driven cellulose-based flexible phase change material and a preparation method thereof. Background technique [0002] The energy conversion and storage process is accompanied by a large amount of thermal energy consumption, and phase change materials (PCMs) are reusable energy storage materials that can absorb and release a large amount of heat during the phase change process. Therefore, it plays an important role in thermal management applications related to solar thermal storage systems, electronic thermal protection, comfortable clothing, energy-efficient buildings, etc. Although phase change materials have attracted extensive attention due to their high latent heat and energy storage density, their utilization is limited: poor flexibility, and most phase change materials tend to be very rigid, which will inevitably lead ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 张涛卢锦涛赵燕
Owner SUZHOU UNIV