Preparation method of phase change gel material with variable mechanical state

A technology of mechanical state and gel material, which is applied in the field of phase change materials, can solve the problems of complex operation and high cost, and achieve the effect of simple operation, low cost, and improved temperature regulation and temperature control performance

Active Publication Date: 2021-10-22
苏州双碳新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the manufacturing techniques used to synthesize existing shape-setting composite phase change materials usually involve hydrothermal methods, freeze-drying, and vacuum impregnation, etc., which are complicated to operate and costly
Therefore, how to obtain phase change materials with high latent heat storage and good shape stability, and the mechanical state can be changed with demand or operating conditions is still a great challenge for this field.

Method used

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  • Preparation method of phase change gel material with variable mechanical state
  • Preparation method of phase change gel material with variable mechanical state
  • Preparation method of phase change gel material with variable mechanical state

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preparation example Construction

[0037] In a first aspect, the application provides a method for preparing a phase-change gel material with a variable mechanical state, which includes the following steps:

[0038] (1) Using the initiator / tetramethylethylenediamine oxidation-reduction system as the initiating system, prepare a poly-N-isopropylacrylamide hydrogel with a three-dimensional crosslinked network structure, and then soak it in a lower alcohol for alcoholization to obtain alcohol gel; and

[0039] (2) heating and melting the phase change material to perform solvent replacement with the alcohol gel to obtain the phase change gel material.

[0040] In this application, an easy-to-implement, novel and low-cost preparation method for three-dimensional cross-linked gel-supported phase-change gel materials is proposed. Wherein, the phase change gel material has a three-dimensional cross-linked network gel as a supporting frame, which can prevent the contained phase change material from leaking, and can mai...

Embodiment 1

[0068] According to the preparation method of the phase-change gel material of variable mechanical state of the present application, it comprises the following steps:

[0069] (1) Dissolve 2.3g of N-isopropylacrylamide, 0.069g of methylenebisacrylamide and 0.023g of initiator potassium persulfate in 10mL of deionized water, and in a nitrogen atmosphere, at 25°C Stir in an oil bath for 30 min. Subsequently, 20 μL of tetramethylethylenediamine was added thereto, and the system was isolated from air, and heated and reacted in an oil bath at 50° C. for 30 minutes. When the temperature drops to room temperature, pour acetone and soak for 12 hours, then soak in deionized water for 12 hours, and finally soak in ethanol for 24 hours to fully alcoholize to obtain alcohol gel;

[0070] (2) Heating 2g of the phase change material stearyl alcohol at 80°C until completely melted, adding 0.66g of the alcohol gel into the above stearyl alcohol melt, and incubating at 80°C for 12h to perform...

Embodiment 2

[0075] According to the preparation method of the phase-change gel material of variable mechanical state of the present application, it comprises the following steps:

[0076] (1) Dissolve 1.8g of N-isopropylacrylamide, 0.072g of methylene bisacrylamide and 0.018g of initiator potassium persulfate in 10mL of deionized water, and in a nitrogen atmosphere, at 25°C Stir in an oil bath for 30 min. Subsequently, 10 μL of tetramethylethylenediamine was added thereto, the system was isolated from air, and heated and reacted in an oil bath at 50° C. for 30 minutes. When the temperature drops to room temperature, pour acetone and soak for 12 hours, then soak in deionized water for 12 hours, and finally soak in ethanol for 24 hours to fully alcoholize to obtain alcohol gel; further replace ethanol with dichloromethane.

[0077] (2) Heating 2g of the phase change material hexadecane at 80°C until completely melted, adding 0.66g of the alcohol gel to the above hexadecane melt, and keepin...

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Abstract

The invention discloses a preparation method of a phase change gel material with a variable mechanical state. The method comprises the following steps: (1) preparing poly (N-isopropylacrylamide) hydrogel with a three-dimensional cross-linked network structure by taking an initiator/tetramethylethylenediamine oxidation-reduction system as an initiation system, and then soaking the hydrogel in lower alcohol for alcoholization to obtain alcogel; and (2) heating and melting a phase change material, and carrying out solvent replacement on the phase change material and the alcogel to obtain a phase change gel material. The phase change gel material prepared according to the preparation method disclosed by the invention is high in phase-change latent heat and excellent in stability, has good elasticity and softness, is an energy storage material with more excellent mechanical properties, can change the shape and rigidity as required, and can be applied to multi-scale adhesion and attachment of various three-dimensional surfaces.

Description

technical field [0001] The present application relates to the field of phase-change materials, and more specifically, to a preparation method of a phase-change gel material with variable mechanical states. Background technique [0002] Phase Change Materials (PCMs) are functional materials that can reversibly absorb and release thermal energy during a phase change process. These materials have been widely used in areas such as battery thermal management, solar heating systems, and electronics cooling. Among them, solid–liquid organic PCMs have been extensively studied due to their stable chemical and thermodynamic properties, small undercooling, and no phase segregation during phase transition. However, all solid-liquid PCMs suffer from leakage during melting, which severely restricts their large-scale practical application. [0003] At present, the above-mentioned problems are solved in the field by preparing shape-setting composite phase change materials. For example, C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/54C08F222/38C08F4/40C08J3/09C09K5/06C08L33/24
CPCC08F220/54C08F4/40C08J3/095C08J3/092C09K5/06C08J2333/24C08F222/385Y02E60/14
Inventor 陈晓高鸿毅刘盼盼李昂其他发明人请求不公开姓名
Owner 苏州双碳新材料有限公司
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