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Three-dimensional gel network carrier and form-stable phase change composite material

A three-dimensional gel and network technology, applied in the field of new shape-setting phase change materials, can solve the problems of loss of phase change heat storage capacity of thermosetting polymers, difficult to control cross-link density, low thermal conductivity, etc., and achieve less phase change enthalpy loss. , The effect of good setting effect and simple preparation process

Inactive Publication Date: 2010-05-19
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its phase transition temperature is high, but the thermal conductivity is too low, and the density of crosslinking points is difficult to control. Excessive crosslinking will become a thermosetting polymer and lose its phase transition heat storage capacity.

Method used

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  • Three-dimensional gel network carrier and form-stable phase change composite material
  • Three-dimensional gel network carrier and form-stable phase change composite material
  • Three-dimensional gel network carrier and form-stable phase change composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The preparation of embodiment 1 gel carrier

[0052] Using pure N-methylolacrylamide as the network agent monomer, N,N'-methylenebisacrylamide as the crosslinking agent, ammonium persulfate as the initiator, and ethanol as the solvent, carry out solution polymerization to form a three-dimensional network gel, of which

[0053] A. The molar ratio of crosslinking agent to monomer is 1:9

[0054] B. The mass ratio of monomer to solvent is 1:10

[0055] C. The initiator accounts for 1.5% of the mass fraction of the monomer

[0056] Weigh the reagents according to the above ratio, and then place them in the flask, and add the solvent last, raise the temperature of the ultrasonic disperser to 70°C, put the flask in the ultrasonic disperser to disperse, melt and disperse all kinds of reagents uniformly, and wait for the reaction After the gel appears in the system, turn off the ultrasound and continue the reaction in a constant temperature water bath at 70°C. After the reac...

Embodiment 2

[0060] (1) Preparation of binary phase change materials suitable for tempering textiles with phase change temperature

[0061] It is prepared by blending 41% of lauric acid and 59% of cetyl alcohol in mole fraction respectively, and the phase transition temperature is 34°C. The specific process is to take 41% lauric acid and 59% cetyl alcohol respectively in mole fractions, add them into a water bath at a constant temperature of 60° C. to melt them, and then continuously stir for 30 minutes.

[0062] (2) Using pure N-methylolacrylamide as a network agent monomer, N, N'-methylenebisacrylamide as a crosslinking agent, ammonium persulfate as an initiator, and ethanol as a solvent to carry out solution polymerization, To generate a three-dimensional network gel, weigh the above reagents according to the following ratio:

[0063] A. The molar ratio of crosslinking agent to monomer is 1:9

[0064] B. The mass ratio of monomer to solvent is 1:10

[0065] C. The initiator accounts ...

Embodiment 3

[0072] The preparation of embodiment 3 gel carrier

[0073] Using pure N-methylolacrylamide as the network agent monomer, N,N'-methylenebisacrylamide as the crosslinking agent, ammonium persulfate as the initiator, and ethanol as the solvent, carry out solution polymerization to form a three-dimensional network gel, of which

[0074] A. The molar ratio of crosslinking agent to monomer is 1:5

[0075] B. The mass ratio of monomer to solvent is 1:10

[0076] C. The initiator accounts for 3% of the mass fraction of the monomer

[0077] Weigh the reagents according to the above ratio, and then place them in the flask, and add the solvent last, raise the temperature of the ultrasonic disperser to 70°C, put the flask in the ultrasonic disperser to disperse, melt and disperse all kinds of reagents uniformly, and wait for the reaction After the gel appears in the system, turn off the ultrasound and continue the reaction in a constant temperature water bath at 70°C. After the reacti...

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Abstract

The invention relates to a three-dimensional gel network carrier and a form-stable phase change composite material which adopt fatty acid (hydrocarbon), polyethylene glycol and other organic phase change materials as work material and use poly-(N-hydroxymethyl)-acrylamide heat-shrinkable interpenetration network as form-stable carrier. The preparation method of the phase change composite material comprises the following steps: firstly adopting low temperature eutectic method to select multiple components composite phase change material with proper phase change temperature, high phase change enthalpy and low cost, designing and determining the preparation method of the interpenetration network carrier and the addition mode of the composite phase change material and the combination mode of the carrier, preparing the form-stable phase change composite material based on multiple actions of bonding, physical adsorption and network confinement, cooling and grinding to obtain the form-stable heat storage functional particles. The form-stable phase change composite material containing 50%-75% of material can be prepared by the method, the maximum phase change enthalpy can be up to 110J / g, and the form-stable phase change composite material prepared by the method can be directly applied in the textile field, building field, military field, etc.

Description

technical field [0001] The invention belongs to the field of new shape-setting phase-change materials, and specifically relates to the design and preparation of a new three-dimensional network carrier and the preparation of a composite phase-change material using the three-dimensional gel network as a shape-setting carrier. Background technique [0002] With the rapid development of global industry, the world's energy is becoming increasingly tense, and environmental pollution is becoming more and more serious. Energy storage materials have special energy storage functions, conform to the theme of energy saving, and are widely valued. Since the 1930s, especially affected by the energy crisis in the 1980s, the basic theory and applied technology research of phase change heat storage has developed rapidly in developed countries (such as the United States, Canada, Japan, Germany, etc.). The mutual penetration of materials science, solar energy, aerospace technology, buildings,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/58C08F236/02C08F2/06C09K5/06
Inventor 张鸿武晓华刘辉王晓磊
Owner DALIAN POLYTECHNIC UNIVERSITY
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