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Graphene oxide aerogel fiber fabric as well as preparation method and application thereof

A graphene aerogel and graphene gel fiber technology, applied in chemical instruments and methods, separation methods, chemical characteristics of fibers, etc., can solve the complex electrospinning preparation process, the material is subject to its own stability, and cannot be used for long-term use. and other problems, to achieve excellent PM2.5 capture performance, good application prospects, and the effect of improving filtration efficiency

Inactive Publication Date: 2020-09-18
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the product prepared by this method has a large pressure drop when it is filtered, and the electrospinning preparation process is complicated
In addition, due to the real PM 2.5 The chemical composition is complex, and the material is limited by its own stability, so it cannot achieve the goal of long-term use
These disadvantages limit its further application

Method used

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  • Graphene oxide aerogel fiber fabric as well as preparation method and application thereof
  • Graphene oxide aerogel fiber fabric as well as preparation method and application thereof
  • Graphene oxide aerogel fiber fabric as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method steps of graphene oxide airgel fiber fabric in the present embodiment are as follows:

[0025] (1) Disperse 24 mg of graphene oxide into 4 mL of deionized water, oscillate and mix for 2 min, and sonicate for 4 min to obtain a well-dispersed graphene oxide solution with a concentration of 6 mg / mL;

[0026] (2) At a rate of 10 μL / min, inject the graphene oxide solution obtained in step 1 into a rotating coagulation bath at 5 r / min through a spinning head with a diameter of 50 μm (in this example, the mass fraction of the rotating coagulation bath is 1% CaCl 2 solution, the solvent in the solution is a mixture of water and ethanol with a volume ratio of 1:9), solidified for 1 s and then washed with deionized water to obtain graphene oxide gel fibers;

[0027] (3) The gel fibers obtained in step (2) were taken, assembled by suction filtration to obtain gel fiber fabrics, and then freeze-dried for 24 h to obtain graphene oxide airgel fiber fabrics.

...

Embodiment 2

[0032] The preparation method steps of graphene oxide airgel fiber fabric in the present embodiment are as follows:

[0033] (1) Disperse 24 mg of graphene oxide into a mixture of 3 mL of deionized water and 3 mL of ethanol, oscillate and mix for 5 min, and sonicate for 10 min to obtain a well-dispersed graphene oxide solution with a concentration of 4 mg / mL ;

[0034] (2) At a rate of 50 μL / min, inject the graphene oxide solution obtained in step (1) into a rotary coagulation bath with a rotation speed of 15 r / min through a spinning head with a diameter of 100 μm (in this example, the rotary coagulation The bath is CaCl with a mass fraction of 5% 2 solution, the solvent in the solution is a mixture of water and ethanol with a volume ratio of 1:3), solidified for 50 s and washed with deionized water to obtain graphene oxide gel fibers;

[0035] (3) The gel fibers obtained in step (2) were taken, assembled by suction filtration to obtain gel fiber fabrics, and then freeze-dri...

Embodiment 3

[0039] The preparation method steps of graphene oxide airgel fiber fabric in the present embodiment are as follows:

[0040] (1) Disperse 4 mg of graphene oxide into 2 mL of deionized water, oscillate and mix for 5 min, and sonicate for 10 min to obtain a well-dispersed graphene oxide solution with a concentration of 2 mg / mL;

[0041] (2) At a rate of 150 μL / min, inject the graphene oxide solution obtained in step (1) into a rotary coagulation bath with a rotation speed of 20 r / min through a spinning head with a diameter of 250 μm (in this example, the rotary coagulation The bath is CaCl with a mass fraction of 25% 2 solution, the solvent in the solution is a mixture of water and ethanol with a volume ratio of 9:1), solidified for 150 s and washed with deionized water to obtain graphene oxide gel fibers;

[0042] (3) The graphene oxide gel fiber obtained in step (2) was taken, assembled by suction filtration to obtain a gel fiber fabric, and then freeze-dried for 48 h to obta...

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Abstract

The invention discloses graphene oxide aerogel fiber fabric as well as a preparation method and application thereof, and belongs to the technical field of nano material assembly and air filtration. The preparation method comprises the following steps of dispersing graphene oxide into a solvent, oscillating is carried out for uniform mixing, and carrying out ultrasonic treatment to obtain a graphene oxide solution; injecting the obtained graphene oxide solution into a rotary coagulating bath through a spinning head, and washing the graphene oxide solution with deionized water after coagulationto obtain graphene oxide gel fibers; and carrying out extraction filtration on the obtained graphene oxide gel fibers to obtain gel fiber fabric, and carrying out freeze drying to obtain the grapheneoxide aerogel fiber fabric. The graphene oxide aerogel fiber fabric as well as the preparation method and the application thereof have the advantages of environment-protecting preparation process, room-temperature operation, low energy consumption and the like, and the prepared product has a hierarchical porous structure formed by nanoscale gaps and micron-sized holes, is high in filtering efficiency and good in PM2.5 capturing performance, and has a wide application prospect in the field of air filtration.

Description

technical field [0001] The invention relates to the technical field of nanomaterial assembly and air filtration, in particular to a graphene oxide airgel fiber fabric and its preparation method and application. Background technique [0002] PM 2.5 Refers to fine particulate matter with an aerodynamic diameter less than or equal to 2.5 μm, which is one of the main components of air pollutants and an important factor affecting air quality. It will seriously affect human health; according to the air hygiene guidelines issued by the World Health Organization (WHO, 2005), long-term exposure to PM 2.5 >10 μg / m 3 95% increase in lung cancer mortality. Therefore, studies can effectively isolate PM 2.5 , and materials with low pressure drop characteristics are of great significance. [0003] At present, the common filter materials are usually made of polymer fibers by electrospinning, and then further assembled into fabrics. The obtained woven materials usually have high fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4242D04H1/4382D01F9/14B01D46/00
CPCB01D46/00D01F9/12D04H1/4242D04H1/4382
Inventor 胡晓珍周俊宏史开源
Owner NANJING UNIV OF INFORMATION SCI & TECH
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