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Graphene aerogel intelligent phase-change fiber, and preparation method and application thereof

A technology of graphene airgel and graphene airgel fiber, which is applied in the field of nanoporous materials and phase change energy storage, can solve problems such as inapplicability, achieve adjustable load capacity, simple preparation process, and wide application prospects

Active Publication Date: 2018-09-28
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this large size in traditional applications cannot be applied to current flexible wearable devices and increasingly miniaturized electronic circuits, so smart phase change fibers with good flexibility and conductivity will become an important direction for future development.

Method used

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  • Graphene aerogel intelligent phase-change fiber, and preparation method and application thereof
  • Graphene aerogel intelligent phase-change fiber, and preparation method and application thereof
  • Graphene aerogel intelligent phase-change fiber, and preparation method and application thereof

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preparation example Construction

[0060] Another aspect of the embodiments of the present invention also provides the preparation method of the aforementioned graphene airgel smart phase change fiber, which includes:

[0061] providing graphene airgel fibers and / or graphene hydrogel fibers;

[0062] Filling the graphene airgel fiber and / or graphene hydrogel fiber with a phase change material by means of melt filling and / or solution filling to obtain a graphene / phase change material composite fiber;

[0063] A hydrophobic coating is coated on the surface of the graphene / phase change material composite fiber to obtain a graphene airgel intelligent phase change fiber.

[0064] Further, the preparation method may include:

[0065] 1) Spinning preparation of graphene airgel fibers;

[0066] 2) Melt filling and / or solution filling of phase change materials;

[0067] 3) Hydrophobic coating coating.

[0068] In some embodiments, the preparation method includes: preparing graphene hydrogel fibers by spinning techno...

Embodiment 1

[0095] (1) Preparation of graphene airgel fibers: Graphene oxide liquid crystals are spun into HCl / VC mixed aqueous solution by wet spinning to obtain graphene hydrogel fibers, and then the hydrogel fibers are subjected to supercritical drying to obtain graphite olefin airgel fibers.

[0096] (2) Preparation of graphene / phase change material composite fibers: immerse graphene airgel fibers in molten paraffin, and place them in a vacuum environment at 100°C for 10 hours, then hang the fibers containing paraffin wax in an oven at 80°C 1h to remove residual paraffin on the surface of the fiber, followed by cooling at room temperature to obtain a graphene / phase change material composite fiber.

[0097] (3) Preparation of hydrophobic coating: Soak graphene / phase change material composite fiber in fluorocarbon resin solution for 5 seconds, then dry at room temperature to obtain graphene airgel smart phase change fiber, wherein the thickness of hydrophobic coating is 100nm .

[009...

Embodiment 2

[0100] (1) Preparation of graphene airgel fibers: Graphene oxide liquid crystals are spun into HCl / HI mixed aqueous solution by wet spinning to obtain graphene hydrogel fibers, and then graphene hydrogel fibers are obtained by freeze-drying Graphene airgel fibers.

[0101] (2) Preparation of graphene / phase change material composite fibers: soak graphene airgel fibers in molten PEG, and place them in a vacuum environment at 80°C for 1 hour, then hang the fibers containing paraffin in an oven at 80°C 1h to remove residual paraffin on the surface of the fiber, followed by cooling at room temperature to obtain a graphene / phase change material composite fiber.

[0102] (3) Preparation of hydrophobic coating: Soak graphene / phase change material composite fiber in fluorocarbon resin solution for 3-5s, then dry at room temperature to obtain graphene airgel smart phase change fiber, wherein, the thickness of hydrophobic coating 10nm.

[0103] The scanning electron microscope photo of...

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Abstract

The invention discloses a graphene aerogel intelligent phase-change fiber, and a preparation method and an application thereof. The graphene aerogel intelligent phase-change fiber comprises graphene aerogel fiber, a phase-change material and a hydrophobic coating layer, wherein the graphene aerogel fiber has a continuous graphene three-dimensional porous network structure formed by overlapping ofgraphene lamellas; the phase-change material is wrapped on the graphene lamellas, and fills and is embedded into the three-dimensional porous network structure; and the hydrophobic coating layer uniformly coats the surface of the graphene aerogel fiber. The graphene aerogel intelligent phase-change fiber provided by the invention has the advantages of excellent electrical properties, flexibility and hydrophobic properties, adjustable phase-change material loading capacity, thermal enthalpy value and melting point, and good application in the aspects of phase-change energy storage, photothermalconversion and storage, and electrothermal conversion and storage; meanwhile, the preparation process provided by the invention is simple, has mild and controllable reaction conditions, is green andpollution-free, is applicable to large-scale production and has extensive application prospects.

Description

Technical field [0001] The invention relates to a new type of graphene airgel intelligent phase change fiber, in particular to a graphene airgel intelligent phase change fiber and its preparation method and application, and belongs to the technical field of nanoporous materials and phase change energy storage. Background technique [0002] Phase change fiber has an intelligent temperature regulation function. When the external temperature changes drastically, the phase change material in the fiber will undergo solid-liquid or solid-solid phase transition, buffering the impact of temperature changes on the human body, thereby creating a comfortable microclimate for the human body. climate environment. With the development of wearable / portable electronic products, flexible energy storage devices have attracted people's attention. As a basic component of wearable devices, smart fibers with multi-function and multi-response have great demand. How to endow phase change fibers w...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 张学同李广勇
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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