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Graphene composite aerogel film with rivet structure as well as preparation method and application of graphene composite aerogel film

A graphene composite, aerogel technology, applied in graphene, chemical instruments and methods, carbon compounds, etc., to achieve the effects of good mechanical strength, easy operation, and mild reaction conditions

Active Publication Date: 2020-11-24
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, ferroferric oxide and graphene oxide composite airgel material (CN104479174A) and magnetic cellulose and graphene oxide composite airgel (CN109535485A) based on nanometer ferroferric oxide, but the graphene function of controlling the synthesis of special structure Aerogel films also have certain challenges

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  • Graphene composite aerogel film with rivet structure as well as preparation method and application of graphene composite aerogel film
  • Graphene composite aerogel film with rivet structure as well as preparation method and application of graphene composite aerogel film
  • Graphene composite aerogel film with rivet structure as well as preparation method and application of graphene composite aerogel film

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preparation example Construction

[0079] Another aspect of the embodiments of the present invention also provides a method for preparing a rivet-structured graphene composite airgel film, comprising:

[0080] Using the sol-gel preparation technology assisted by wet-spinning membrane, a rivet-structured graphene composite hydrogel film was prepared;

[0081] Carry out drying treatment (such as supercritical fluid drying and / or freeze-drying treatment) to described rivet structure graphene composite hydrogel film, while keeping the gel network from being destroyed, remove the solvent molecule in the gel, obtain rivet Structural graphene composite airgel films.

[0082] In some embodiments, the preparation method of the rivet structure graphene composite airgel film specifically includes:

[0083] (1) providing a coagulation bath comprising reducing ferrous metal ions;

[0084] (2) Using wet spinning method, the graphene oxide liquid crystal is injected into the coagulation bath, and the reducing ferrous metal ...

Embodiment 1

[0131] (a) The graphene oxide liquid crystal of 5mg / ml is injected into the coagulation bath of 0.01wt% ferrous sulfate solution simultaneously with the injection speed of 0.01ml / min through wet-spun film needle (width is 5mm), obtains continuous graphene Hydrogel film.

[0132] (b) immerse the graphene hydrogel film in the step (a) in the coagulation bath solution, utilize the ferrous ion in the coagulation bath to reduce the graphene oxide, leave it at 20 DEG C for 6h, generate iron oxyhydroxide nanofibers, and then After waiting for chemical sol-gel aging, the graphene composite hydrogel film with rivet structure was obtained.

[0133] (c) the rivet structure graphene composite hydrogel film in step (b) is replaced ten times through ethanol solvent, the time of each replacement is 3h, and the volume ratio of ethanol and rivet structure graphene composite hydrogel film is 5: 1. Afterwards, at 30°C, supercritically dry for 24 hours to obtain a rivet-structured graphene compo...

Embodiment 2

[0139] (a) The graphene oxide liquid crystal of 10mg / ml is injected into the coagulation bath of 0.1wt% ferrous chloride solution simultaneously with the injection speed of 0.1ml / min through wet-spun film needle (width is 8mm), obtains continuous graphite Alkene hydrogel films.

[0140] (b) immerse the graphene hydrogel film in the step (a) in the coagulation bath solution, utilize the ferrous ion in the coagulation bath to reduce the graphene oxide, leave it at 30 DEG C for 8h, generate iron oxyhydroxide nanofibers, and then After waiting for chemical sol-gel aging, the graphene composite hydrogel film with rivet structure was obtained.

[0141] (c) the rivet structure graphene composite hydrogel film in step (b) is replaced ten times through ethanol solvent, the time of each replacement is 5h, and the volume ratio of ethanol and rivet structure graphene composite hydrogel film is 8: 1. After that, supercritically dry at 44°C for 24 hours to obtain a rivet-structured graphen...

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Abstract

The invention discloses a graphene composite aerogel film with a rivet structure as well as a preparation method and an application of the graphene composite aerogel film. The rivet-structured graphene composite aerogel film has a continuous, regular and ordered graphene three-dimensional porous network structure and a rivet structure, wherein the three-dimensional porous network structure is formed by overlapping graphene sheet layers; and the rivet structure is formed by compounding hydroxyl iron oxide nanofibers and the graphene sheet layers in a manner that the hydroxyl iron oxide nanofibers bridge and penetrate through the graphene sheet layers. The preparation method comprises the following steps: preparing a graphene composite hydrogel film with a rivet structure by utilizing a sol-gel preparation technology assisted by wet spinning, and then carrying out solvent replacement and drying treatment to obtain the graphene composite aerogel film with the rivet structure. The graphenecomposite aerogel film with the rivet structure has relatively high mechanical strength and excellent hydrophilicity, and can be assembled into a photovoltaic device to realize high-efficiency brinepower generation, and in addition, the preparation process is concise, the reaction conditions are mild, the operation is easy, the cost is low, the film is green and pollution-free, and realize continuous production can be realized.

Description

technical field [0001] The invention relates to a preparation method of a graphene composite airgel film, in particular to a rivet-structured graphene composite airgel film and its preparation method and application, belonging to the technical field of nano energy. Background technique [0002] Airgel is a low-density solid material with a continuous three-dimensional porous network structure formed by the sol-gel method and a special drying process (such as supercritical fluid drying). Since 1932, the American chemist Kistler first used supercritical fluid drying technology to prepare silica aerogels. Subsequently, aerogels, as a new member of the material family, have attracted people's attention and research. With the continuous enrichment of airgel research methods and the continuous deepening of basic research, more and more new aerogels continue to emerge today, and aerogels have changed from the original SiO 2 Aerogels developed into a huge family of airgel. Such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198C01B32/194C01B32/184
CPCC01B32/198C01B32/194C01B32/184C01B2204/22C01B2204/32C01B2204/20
Inventor 张学同汪伟
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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