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Electrospun nanofiber composite carbon aerogel and preparation method thereof

A technology of nanofibers and carbon aerogels, which is applied in the fields of fiber chemical characteristics, ceramic products, textiles and papermaking, etc., can solve the problems of uneven dispersion of supports, high packing density of raw materials, complicated preparation methods, etc. The effect of controllable shape, reduced bulk density and simple operation

Active Publication Date: 2019-01-04
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a nanofiber composite carbon aerogel and its preparation method in view of the problems of uncontrollable structure, general mechanical properties, complicated preparation method, high bulk density of raw materials, uneven dispersion of supports and the like existing in the above-mentioned carbon aerogel.

Method used

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  • Electrospun nanofiber composite carbon aerogel and preparation method thereof
  • Electrospun nanofiber composite carbon aerogel and preparation method thereof
  • Electrospun nanofiber composite carbon aerogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of nanofiber composite carbon airgel materials from polyacrylonitrile (PAN) and graphene oxide (GO):

[0034] (1) Preparation of spinning solution: Weigh 2 g of PAN polymer powder, add it to dimethylformamide (DMF), put it in a water bath at 60 °C and stir until dissolved, and obtain a PAN spinning solution with a mass fraction of 10%. liquid;

[0035] (2) Preparation of nanofiber / support dispersion: transfer the spinning solution in step (1) into a syringe and connect it to an autosampler, connect the needle to a high-voltage power supply for electrospinning, and the receiving solution is 0.2 mg / mL GO dispersion in water. Spinning conditions: the spinning voltage is 20 kV, -10 kV, the flow rate of the spinning solution is 1 mL / h, the distance between the needle and the receiving liquid surface is 15 cm, and the fiber density is 2 mg / mL;

[0036] (3) Preparation of nanofiber / support composite block: transfer the PAN nanofiber / GO composite dispersion prepar...

Embodiment 2

[0039] With PAN and manganese dioxide nanosheets (MnO 2 ) as raw material to prepare nanofiber composite carbon airgel material:

[0040] (1) Preparation of spinning solution: Weigh 2 g of PAN polymer powder, add it to DMF, place it in a water bath at 60 °C and stir until dissolved to obtain a PAN spinning solution with a mass fraction of 10%;

[0041] (2) Preparation of nanofiber / support dispersion: transfer the spinning solution in step (1) into a syringe and connect it to an autosampler, connect the needle to a high-voltage power supply for electrospinning, and the receiving solution is 0.5 mg / mL MnO2 / 50% tert-butanol / water dispersion. Spinning conditions: the spinning voltage is 15 kV, -5 kV, the flow rate of the spinning solution is 2 mL / h, the distance between the needle and the receiving liquid surface is 20 cm, and the fiber density is 2 mg / mL;

[0042] (3) Preparation of nanofiber / support composite block: transfer the PAN nanofiber / MnO2 dispersion prepared in step (...

Embodiment 3

[0045] Preparation of nanofiber composite carbon airgel materials with PAN, polymethyl methacrylate (PMMA) and GO as raw materials:

[0046] (1) Preparation of spinning solution: Weigh 2 g of PAN and 1 g of PMMA polymer powder, add them to DMF, place in a 60 °C water bath and stir until dissolved to obtain a mixed spinning solution with a mass fraction of 15%;

[0047] (2) Preparation of nanofiber / support dispersion: transfer the spinning solution in step (1) into a syringe and connect it to an autosampler, connect the needle to a high-voltage power supply for electrospinning, and the receiving solution is 0.2 mg / mL GO / 50% ethanol / water dispersion. Spinning conditions: the spinning voltage is 30 kV, -5 kV, the flow rate of the spinning solution is 0.5 mL / h, the distance between the needle and the receiving liquid surface is 20 cm, and the fiber density is 1 mg / mL;

[0048] (3) Preparation of nanofiber / support composite block: transfer the PAN / PMMA nanofiber / GO dispersion prep...

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Abstract

The invention provides a preparation method of nanofiber composite carbon aerogel and belongs to the field of nanofiber carbon aerogel. The method comprises the steps of obtaining a composite dispersion liquid of nanofibers and a support body by means of electrospinning and receiving of a support body dispersion liquid; obtaining the fluffy carbon aerogel through freeze-drying, pre-oxidation and carbonization treatment. According to the method for directly receiving the electrospun nanofibers through the support body dispersion liquid, the support body can be simultaneously diffused into fibernetworks in the spinning process, so that the step of mechanically dispersing and re-crosslinking fiber membranes in most preparation methods is omitted, and the problem of nonuniform dispersion of additives is also solved. The interior of the composite carbon aerogel prepared by means of the method is of an open pore structure formed by assembling the nanofibers and the support body, and the material has excellent mechanical performance and compression resilience. The carbon aerogel can be applied to environmental governance and has a good application prospect in the field of supercapacitorelectrode materials.

Description

technical field [0001] The invention discloses an electrostatic spinning nanofiber composite carbon aerogel and a preparation method thereof, belonging to the field of nanofiber carbon aerogel. Background technique [0002] Carbon airgel is a three-dimensional lightweight porous carbon material with high specific surface area, ultra-low density and good electrical conductivity; it can be used as adsorbent, catalyst carrier, electrode material, and applied to the adsorption, catalysis and Electrocatalytic treatment; it is also an ideal electrode material for new energy batteries and electric double layer supercapacitors, and it also has a good application prospect in hydrogen storage, which is one of the research hotspots in recent years. The current types of carbon aerogels mainly include biochar, carbon nanotubes, graphene, and carbon nanofiber-based carbon aerogels. Bio-carbon aerogels are limited by the structure of their raw materials, and the microstructure of the mate...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/622C04B35/84C04B35/80D01F9/22D01F9/21D01F9/28C04B38/06
CPCC04B35/622C04B35/80C04B35/83C04B38/067C04B2235/3267D01F9/21D01F9/22D01F9/28C04B35/803
Inventor 郑煜铭林英正钟鹭斌
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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