Preparation method of nano cellulose and carbon nanotube synergistically modified carbon fiber

A technology of nanocellulose and carbon nanotubes, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problem that the vacuum filtration method has not been applied to surface modification, etc., and achieves the advantages of interface stress transfer, simple equipment, low cost effect

Inactive Publication Date: 2021-10-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the circumferential surface of carbon fiber tow, the vacuum filtration method has not been applied to its surface modification at present.

Method used

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  • Preparation method of nano cellulose and carbon nanotube synergistically modified carbon fiber
  • Preparation method of nano cellulose and carbon nanotube synergistically modified carbon fiber
  • Preparation method of nano cellulose and carbon nanotube synergistically modified carbon fiber

Examples

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Effect test

Embodiment 1

[0025] This embodiment provides a method for preparing carbon fibers synergistically modified by nanocellulose and carbon nanotubes, which specifically includes the following steps:

[0026] 1) Freeze-drying the aqueous dispersion of cellulose nanofibers to obtain cellulose nanofibers for future use.

[0027] 2) Prepare an aqueous solution of cellulose nanofibers and carbon nanotubes with a mass fraction of 0.05% uniformly dispersed, respectively.

[0028] 3) The long carbon fiber tow was placed in an acetone solution at 80°C for condensing and refluxing for 24 hours, the extracted carbon fibers were cleaned with deionized water, and dried in a vacuum drying oven at 50°C for 3 hours.

[0029] 4) Mix the cellulose nanofiber aqueous solution and the carbon nanotube aqueous solution at a mass ratio of 1:1, and stir magnetically at 300 rpm / min for 30 minutes to disperse the solution evenly to obtain a mixed solution of cellulose nanofiber and carbon nanotube; process step 3) to ob...

Embodiment 2

[0032] This embodiment provides a method for preparing carbon fibers synergistically modified by nanocellulose and carbon nanotubes, which specifically includes the following steps:

[0033] 1) Freeze-drying the aqueous dispersion of cellulose nanofibers to obtain cellulose nanofibers for future use.

[0034] 2) Prepare an aqueous solution of cellulose nanofibers and carbon nanotubes with a mass fraction of 0.05% uniformly dispersed, respectively.

[0035] 3) The long carbon fiber tow was placed in an acetone solution at 100°C for condensing and refluxing for 12 hours, the extracted carbon fibers were cleaned with deionized water, and dried in a vacuum oven at 40°C for 5 hours.

[0036] 4) Mix the cellulose nanofiber aqueous solution and the carbon nanotube aqueous solution at a mass ratio of 1:1, stir the solution with a magnetic force at 500 rpm / min for 30 minutes to disperse the solution evenly, and obtain a mixed solution of cellulose nanofiber and carbon nanotube; process...

Embodiment 3

[0039] This embodiment provides a method for preparing carbon fibers synergistically modified by nanocellulose and carbon nanotubes, which specifically includes the following steps:

[0040] 1) Freeze-drying the aqueous dispersion of cellulose nanocrystals to obtain cellulose nanocrystals for future use.

[0041] 2) Prepare the cellulose nanocrystal aqueous solution and the carbon nanotube aqueous solution with a mass fraction of 2% and uniformly dispersed, respectively.

[0042] 3) The long carbon fiber tow was placed in an acetone solution at 80°C for condensing and reflux for 48 hours, the extracted carbon fibers were cleaned with deionized water, and dried in a vacuum oven at 70°C for 3 hours.

[0043]4) The carbon fiber tow obtained in step 3) is evenly placed on the filter membrane, and the cellulose nanocrystal is vacuumed on its surface according to the volume of the cellulose nanocrystal aqueous solution (ml): filter membrane diameter (cm)=0.2:1 The aqueous solution ...

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Abstract

The invention relates to a preparation method of nano cellulose and carbon nanotube synergistically modified carbon fiber. The preparation method comprises the following steps of 1) freeze-drying a nano cellulose aqueous dispersion to obtain nanofibers; 2) preparing a nano cellulose aqueous solution and a carbon nanotube aqueous solution; 3) uniformly mixing the nano cellulose aqueous solution and the carbon nanotube aqueous solution, and depositing the mixed solution of nano cellulose and carbon nanotubes on the surface of the uniformly laid carbon fiber tows by adopting a vacuum filtration method; or sequentially carrying out suction filtration on the nano cellulose aqueous solution and the carbon nanotube aqueous solution by adopting a vacuum suction filtration method, overturning the carbon fiber tows deposited on the nano cellulose aqueous solution and the carbon nanotube aqueous solution by 180 degrees, and repeating the deposition step to obtain the nano cellulose and carbon nanotube synergistically modified carbon fiber. The interface bonding strength of the composite material can be improved by 18%-64.7% through the carbon fibers synergistically modified by the nano cellulose and the carbon nanotubes.

Description

technical field [0001] The invention belongs to the technical field of surface and interface modification methods of materials, and in particular relates to a method for preparing carbon fibers synergistically modified by nanocellulose and carbon nanotubes. Background technique [0002] Carbon fiber is a new material with important strategic significance. Whether the excellent performance of carbon fiber / resin composites can be fully exerted is related to whether the interface can effectively transfer stress. However, the surface inertia of carbon fiber is not conducive to the infiltration of fiber and resin matrix, resulting in The problem of weak interface usually leads to premature failure of composite materials, which limits the application range of carbon fibers. Therefore, surface modification of carbon fibers, increasing the surface roughness and activity of carbon fibers, and improving the interfacial bonding strength between carbon fibers and the matrix have importa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/05D06M11/74C08J5/06C08L63/00C08K9/04C08K9/02C08K7/06D06M101/40
CPCD06M15/05D06M11/74C08J5/06D06M2101/40C08J2363/00C08K9/08C08K9/02C08K7/06
Inventor 武清白换换叶紫怡朱建锋
Owner SHAANXI UNIV OF SCI & TECH
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