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Preparation method of bacterial-cellulose-fiber-based nano-grade carbon fiber

A technology of bacterial cellulose and carbon nanofibers, which is applied in the fields of fiber chemical characteristics, textiles and papermaking, and can solve the problems of inability to prepare carbon nanofibers

Inactive Publication Date: 2015-02-11
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using this traditional carbon fiber processing process, the diameter of the fiber that can be produced is generally in the range of 7 μm to 20 μm, and it is impossible to prepare nano-scale carbon nanofibers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Place the bleached bacterial cellulose wet film between a pair of holding rollers with a diameter of 20mm, and feed it at a certain speed (10 mm / min); through a polishing wheel composed of needle-shaped, superhard, and elastic stainless steel wires Needle-like carding on the surface, high-speed puncture, splitting and carding, transforming the bacterial cellulose wet film into bacterial cellulose fibers; the bacterial cellulose ultra-fine fibers are filtered by a filter press to prepare 100% moisture content Bacterial cellulose superfine fiber, superfine fiber diameter 100nm, superfine fiber length 40mm; the above bacterial cellulose superfine fiber is treated with liquid nitrogen, put into a vacuum freeze dryer to freeze-dry, and after the fiber does not contain moisture, Prepare the porous bacterial cellulose superfine dry fiber with the macroscopic appearance and constant volume when the wet state is maintained; the above superfine fiber is placed in a muffle furnace,...

Embodiment 2

[0027] Place the bleached bacterial cellulose wet film between a pair of holding rollers with a diameter of 50mm, and feed it at a certain speed (50mm / min); through a polishing wheel composed of needle-shaped, superhard, and elastic stainless steel wires Needle-like carding on the surface, high-speed puncture, splitting and carding, transforming the bacterial cellulose wet film into bacterial cellulose fibers; the bacterial cellulose ultra-fine fibers are filtered by a filter press to prepare 100% moisture content Bacterial cellulose superfine fiber, the diameter of the superfine fiber is less than 100nm, and the length of the superfine fiber is less than 60mm; after the above bacterial cellulose superfine fiber is treated with liquid nitrogen, it is placed in a vacuum freeze dryer and freeze-dried until the fiber does not contain moisture Finally, the porous bacterial cellulose superfine dry fiber with the macroscopic appearance and constant volume in the wet state is prepared...

Embodiment 3

[0029]Place the bleached bacterial cellulose wet film between a pair of holding rollers with a diameter of 80mm, and feed it at a certain speed (1000 mm / min); through a polishing wheel composed of needle-shaped, superhard, and elastic stainless steel wires Needle-like carding on the surface, high-speed puncture, splitting and carding, transforming the bacterial cellulose wet film into bacterial cellulose fibers; the bacterial cellulose ultra-fine fibers are filtered by a filter press to prepare 90% moisture content Bacterial cellulose superfine fiber, the diameter of the superfine fiber is less than 100nm, and the length of the superfine fiber is less than 100mm; after the above bacterial cellulose superfine fiber is treated with liquid nitrogen, it is placed in a vacuum freeze dryer to freeze-dry, and the fiber does not contain moisture Finally, the porous bacterial cellulose superfine dry fiber with the macroscopic appearance and constant volume in the wet state is prepared; ...

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PUM

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Abstract

The invention relates to a preparation method of bacterial-cellulose-fiber-based nano-grade carbon fiber. According to the invention, a bacterial cellulose wet film is adopted as a substrate raw material. The prepared nano-grade carbon fiber is a product obtained after pyrolytic carbonization and graphitization of ultrafine bacterial cellulose fiber processed through an acupuncture carding refining treatment. The bacterial-cellulose-fiber-based nano-grade carbon fiber preparation method provided by the invention is safe, simple, and highly efficient, and has the advantages of wide raw material source, low price, and environment-friendly processing method. The bacterial-cellulose-fiber-based nano-grade carbon fiber obtained by processing has wide application field and great potential economic benefit.

Description

technical field [0001] This patent relates to a method for processing nano-carbon fibers, in particular to a method for preparing and processing bacterial cellulose fiber-based nano-carbon fibers. technical background [0002] As the reinforcing fiber of a new generation of composite materials, carbon fiber is characterized by its high strength and high modulus ratio, low density, low x-ray absorption rate, corrosion resistance, ablation resistance, fatigue resistance, thermal shock resistance, electrical and thermal conductivity, small expansion coefficient and Excellent properties such as self-lubrication, composite materials with metal, resin, rubber, glass, etc. are widely used in various fields from high-tech industries such as aerospace, aviation, and navigation to automobiles, construction, and light industry. High-performance carbon fiber is the most important reinforcing material in high-tech composite materials. It has a decisive impact on national defense and nati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/16
Inventor 张迎晨张夏楠吴红艳
Owner ZHONGYUAN ENGINEERING COLLEGE
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