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A double-network phase-change airgel and its preparation method

An airgel and double-network technology, applied in the field of materials, can solve the problems of closed pores, limited adsorption capacity, and uneven distribution of phase change materials, etc., to achieve high porosity, simple preparation process, and good immobilization effect Effect

Active Publication Date: 2021-03-09
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the vacuum impregnation method is generally used for phase change aerogels. The phase change material is fixed in the pores of the airgel by capillary action through the vacuum degree formed by the vacuum drying oven. It is made by physical adsorption in steps, and the distribution of the phase change material is insufficient. Disadvantages such as uniformity, limited adsorption capacity, and closed pores

Method used

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  • A double-network phase-change airgel and its preparation method
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  • A double-network phase-change airgel and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] (1) Preparation of aqueous phase DN solution

[0041] Put 30g of PEG1500 into a 250ml beaker, melt it in a water bath at 60°C, put 90g of water, 1.38g of MBA, 6.58g of AM, 1.38g of SA, and 0.13g of KPS into the melted PEG1500 to form an aqueous phase solution;

[0042] (2) Preparation of oil phase solution

[0043] Weigh 19.5g of emulsifier Span 60, measure 5.6ml of Tween 60, and 332ml of cyclohexane as the dispersed phase, add them into a three-necked flask, dissolve in a water bath at 60°C, and make an emulsion.

[0044] (3) Emulsion polymerization

[0045] Fix the three-necked flask containing the oil phase solution in a water bath at 30°C, extract the water phase solution with a 20ml syringe, adjust the speed of the high-speed disperser to 5400r / min, and feed the water phase solution drop by drop at a speed of 10mm / min. Add it dropwise to a three-necked flask, and continue emulsifying for 30 minutes after the addition. Then set the temperature of the water bath t...

Embodiment 2

[0049] (1) Preparation of aqueous phase DN solution

[0050] Put 30g of PEG1500 into a 250ml beaker, melt it in a water bath at 60°C, put 90g of water, 1.38g of MBA, 6.58g of AM, 1.38g of SA, and 0.13g of KPS into the melted PEG1500 to form an aqueous phase solution;

[0051] (2) Preparation of oil phase solution

[0052] Weigh 19.5g of emulsifier Span 60, measure 5.6ml of Tween 60, and 332ml of dispersed phase cyclohexane, add them into a three-necked flask, dissolve in a water bath at 60°C, and make an emulsion.

[0053] (3) Emulsion polymerization

[0054] Fix the three-necked flask containing the oil phase solution in a water bath at 30°C, extract the water phase solution with a 20ml syringe, adjust the speed of the high-speed disperser to 5400r / min, and feed the water phase solution drop by drop at a speed of 10mm / min. Add it dropwise to a three-necked flask, and continue emulsifying for 30 minutes after the addition. Then set the temperature of the water bath to 75°C,...

Embodiment 3

[0058] (1) Preparation of aqueous phase DN solution

[0059] Put 30g of PEG1500 into a 250ml beaker, melt it in a water bath at 60°C, put 90g of water, 1.38g of MBA, 6.58g of AM, 1.38g of SA, and 0.13g of KPS into the melted PEG1500 to form an aqueous phase solution;

[0060] (2) Preparation of oil phase solution

[0061] Weigh 19.5g of emulsifier Span 60, measure 5.6ml of Tween 60, and 332ml of dispersed phase cyclohexane, add them into a three-necked flask, dissolve in a water bath at 60°C, and make an emulsion.

[0062] (3) Emulsion polymerization

[0063] Fix the three-necked flask containing the oil phase solution in a water bath at 30°C, extract the water phase solution with a 20ml syringe, adjust the speed of the high-speed disperser to 5400r / min, and feed the water phase solution drop by drop at a speed of 10mm / min. Add it dropwise to a three-necked flask, and continue emulsifying for 30 minutes after the addition. Then set the temperature of the water bath to 75°C,...

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Abstract

The invention discloses a double-network phase-change airgel and a preparation method thereof. Double-network phase-change aerogels were prepared by emulsion polymerization. The prepared phase change aerogel not only retains the rich pore structure of the aerogel, but also realizes the dual functions of the phase change material and the aerogel material, which provides a basis for more functionalization; the phase change aerogel can effectively Realize the immobilization of PEG, the phase change temperature can be regulated by the molecular weight of PEG, the phase change enthalpy can reach more than 90J / g, and the specific surface area can reach 230m 2 It can be used in smart textiles, thermal insulation materials, protective materials, smart adsorbents, industrial waste heat utilization and other fields. Moreover, based on its chemical structure and morphological structure regulation mechanism, different dual-network immobilized components can be selected to achieve more functionalities such as light and electricity.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a double-network phase-change airgel and a preparation method thereof. Background technique [0002] Phase change aerogels are usually prepared with phase change materials as the core, which are fixed in the pore structure of the existing airgel, and the phase change materials are fixed in the airgel to undergo a phase change. For PEG-like solid-liquid phase change materials, the airgel restricts the flow of the phase change material so as to avoid the leakage of the phase change material and increase the storage stability and long-term performance of the phase change material. [0003] In recent years, there have been patents for preparing composite phase change materials using airgel as a matrix. Patent No. CN107617396A uses airgel microspheres as a template, and immerses airgel microspheres in molten state phase change materials. , cooling and solidification to obtain pha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C09K5/06C08F251/00C08J9/28C08J3/24C08L71/02C08L51/08C08K3/16
CPCC08F251/00C08J3/246C08J9/28C08J2201/0504C08J2371/02C08J2451/08C08K2003/162C09K5/063C08F220/56
Inventor 张鸿邹新全赵云鹤刘玲伟朱浩彤闫铭
Owner DALIAN POLYTECHNIC UNIVERSITY
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