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Self-fused graphene oxide fiber paper and preparation method thereof

A technology of graphene fiber and fusion method, which is applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, fiber raw material processing, papermaking, etc., to achieve the effect of improving preparation efficiency, reducing the process of solvent removal, and broad application prospects

Inactive Publication Date: 2019-02-01
HANGZHOU GAOXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The work of obtaining thin films by wet fusion of fibers has not been reported before

Method used

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  • Self-fused graphene oxide fiber paper and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) The graphene oxide / N, N-dimethylformamide solution with a concentration of 5 mg / mL was used as the spinning solution, and ethyl acetate was used as the coagulation bath for continuous wet spinning.

[0025] (2) Place the obtained graphene oxide fiber at room temperature for 12 h, and then heat at 40° C. for 3 h.

[0026] (3) Soak the pretreated graphene oxide fibers in an aqueous solution for more than 10 minutes to make them fully swell, and then use a high-speed shear to cut the fibers at a speed of 3000 rpm to obtain a water dispersion of graphene oxide short fibers (1-7mm) liquid.

[0027] (4) vacuum filter the graphene oxide short fiber dispersion, make it deposited on the filter membrane and dry.

[0028] After the above steps, the obtained self-fused graphene oxide fiber paper is macroscopically indistinguishable from the graphene oxide film obtained by conventional methods, with a mechanical strength of about 82MPa and a density of about 1.1g / cm 3 . In te...

Embodiment 2

[0030] (1) The graphene oxide / N, N-dimethylformamide solution with a concentration of 5 mg / mL was used as the spinning solution, and ethyl acetate was used as the coagulation bath for continuous wet spinning.

[0031] (2) The obtained graphene oxide fiber was left at room temperature for 12 hours, and then heated at a temperature of 60° C. for 3 hours.

[0032] (3) Soak the pretreated graphene oxide fibers in an aqueous solution for more than 10 minutes to make them fully swell, and then use a high-speed shear to cut the fibers at a speed of 3000 rpm to obtain a water dispersion of graphene oxide short fibers (1-7mm) liquid.

[0033] (4) vacuum filter the graphene oxide short fiber dispersion, make it deposited on the filter membrane and dry.

[0034] After the above steps, the obtained self-fused graphene oxide fiber paper is macroscopically indistinguishable from the graphene oxide film obtained by conventional methods, the mechanical strength of the fiber paper is about 55...

Embodiment 3

[0036] Steps 1, 3, and 4 are the same as in Example 1, and in step 2, graphene oxide fibers are pretreated at 80°C.

[0037] After the above steps, the obtained self-fused graphene oxide fiber paper has an uneven thickness distribution macroscopically, with a tensile strength of about 10MPa and a density of about 0.8g / cm 3 . In terms of microstructure, the degree of fusion further decreases, the fiber network structure is obvious, and the porosity increases.

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Abstract

The invention discloses a self-fused graphene oxide fiber paper and a preparation method thereof. Different from the preparation method of a traditional graphene oxide film, the graphene oxide fiber paper is assembled by using the graphene oxide short fiber as a base through fusion with a wet method, Since the structural unit constituting the film material is a one-dimensional graphene oxide fiberhaving a diameter of several tens of micrometers instead of a two-dimensional graphene oxide sheet with a non-nano level thickness, the molding time of the fiber paper can be greatly shortened, and the performance of the graphene oxide film close to the film by a conventional process can be obtained. At the same time, through the selection of the composition and pretreatment process of the structural unit graphene oxide fiber and the control of a fusion degree, the flexible design of the structure and function of the fiber paper can be realized, and the application field of the graphene oxidefiber paper can be expanded.

Description

technical field [0001] The invention relates to graphene fibers and membrane materials, in particular to a graphene oxide paper formed by wet fusion of graphene oxide fibers and a preparation method thereof. Background technique [0002] Graphene oxide is a two-dimensional material with nanoscale thickness, which can be stably dispersed in polar solutions such as aqueous solution, so it has good film-forming properties and processability. The preparation of graphene oxide film was first reported by Ruoff et al. (Dikin et al. Nature 2007, 448:457–460), showing good flexibility and certain mechanical strength. With the in-depth development of graphene research field in recent years, graphene oxide / graphene membrane material is an important two-dimensional macroscopic assembly, and related preparation methods, structure optimization and functional applications are hot research directions in this field one. Researchers have developed commonly used graphene oxide film preparati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/50
CPCD21H13/50
Inventor 高超李拯
Owner HANGZHOU GAOXI TECH CO LTD