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Preparation method of bacterial cellulose based carbon nanofibers

A bacterial cellulose and nano-carbon fiber technology, applied in fiber processing, natural fiber, fiber chemical characteristics, etc., can solve the problems of cumbersome preparation parameters, affect the preparation cost and application field of nano-carbon fiber, and cannot form three-dimensional network nanofibers, etc., to achieve The preparation process is simple and easy, the effect of good spatial network structure and excellent mechanical properties

Active Publication Date: 2014-05-28
钟春燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation of nanofibers by these methods often requires very complex equipment, setting tedious preparation parameters, and the prepared nanofibers have only one-dimensional or two-dimensional structures, and cannot form complex nanofibers with three-dimensional networks. These factors will affect nanofibers. Preparation cost and application field of carbon fiber

Method used

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  • Preparation method of bacterial cellulose based carbon nanofibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The bacterial cellulose fermented by Alcaligenes and Aerobacter was placed in 10wt% sodium hydroxide aqueous solution and cooked at high temperature for 1 hour, and washed with deionized water until neutral. The material was frozen at -80 °C for 24 h, and then dried under vacuum for 24 h.

[0023] The dried bacterial cellulose material is placed in an atmosphere furnace under the protection of nitrogen and heated from room temperature to 800°C for carbonization treatment. The heating rate in the range of 100-300°C is 5°C / min, and the heating rate in the range of 300-500°C is 1°C / min, the heating rate in the range of 500-800°C is 30°C / min; when the temperature reaches 800°C, continue to heat up to 3000°C, the heating rate is 30°C / min; after the heating is completed, the material is slowly cooled to room temperature in the atmosphere furnace to obtain the diameter A bacterial cellulose-based carbon nanofiber material with a thickness of about 30nm and a three-dimensional...

Embodiment 2

[0025] The bacterial cellulose fermented by Acetobacter xylinum was placed in 5wt% sodium hydroxide aqueous solution and cooked at high temperature for 1 hour, and washed with deionized water until neutral. The material was frozen at −20° C. for 24 h, and then dried under vacuum for 24 h.

[0026] The dried bacterial cellulose material is placed in an atmosphere furnace and heated from room temperature to 600°C under vacuum for carbonization treatment. The heating rate in the range of 100-300°C is 5°C / min, and the heating rate in the range of 300-500°C is 1°C. / min, the heating rate in the range of 500-600°C is 30°C / min; when the temperature reaches 600°C, continue to heat up to 2000°C, the heating rate is 50°C / min; after the heating is completed, the material is slowly cooled to room temperature in the atmosphere furnace to obtain the diameter A bacterial cellulose-based carbon nanofiber material with a size of about 10nm and a three-dimensional network space structure.

Embodiment 3

[0028] The bacterial cellulose fermented by Sarcina and Pseudomonas was placed in 6wt% sodium hydroxide aqueous solution and cooked at high temperature for 0.6h, and washed with deionized water until neutral. The material was frozen at -30 °C for 12 h and then dried in vacuo for 48 h.

[0029] The dried bacterial cellulose material is placed in an atmosphere furnace and heated from room temperature to 800°C under vacuum for carbonization treatment. The heating rate in the range of 100-300°C is 6°C / min, and the heating rate in the range of 300-500°C is 2°C / min, the heating rate in the range of 500-800°C is 30°C / min; when the temperature reaches 800°C, continue to heat up to 2200°C, the heating rate is 50°C / min; after the heating is completed, the material is slowly cooled to room temperature in the atmosphere furnace to obtain the A bacterial cellulose-based carbon nanofiber material with a size of about 10nm and a three-dimensional network space structure.

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Abstract

The invention discloses a preparation method of bacterial cellulose based carbon nanofibers and relates to a preparation technology of a carbon fiber material. The preparation method comprises the following steps: carrying out purification treatment on bacterial cellulose obtained by bacterial fermentation and carrying out freeze drying, carrying out carbonization treatment by putting the dried bacterial cellulose material into an atmosphere furnace and heating to 600-1200 DEG C, further heating the processed material to graphitize the material, and cooling to obtain the bacterial cellulose based carbon nanofiber material having a three-dimensional net structure. The preparation technology is simple and easy to carry out, is convenient to operate and has low cost. The obtained bacterial cellulose based carbon nanofiber has a good spatial net structure, has excellent mechanical property, thermal stability and conductivity, and can be applied in fields of electron devices, special composite materials, high efficient catalytic materials, biological materials and the like.

Description

technical field [0001] The invention relates to the field of carbon fiber materials, in particular to a method for preparing bacterial cellulose-based nano-carbon fibers. Background technique [0002] Carbon fiber is a carbon fiber obtained after carbonization of organic fibers. It has ultra-high tensile strength and tensile modulus, stable chemical properties, and high level of corrosion resistance. Good fatigue, specific heat and conductivity between non-metal and metal, small thermal expansion coefficient, good X-ray transparency, etc. With the development of science and technology, the application fields of carbon fiber are increasing day by day. In addition to being widely used in aerospace and other high-tech fields, they can also be used in stationery, textile machinery, medical equipment, bioengineering, building materials, chemical machinery, transportation vehicles, etc. [0003] Carbon nanofibers refer to carbon fibers with nanoscale. The nano-effects are added t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/14D01F11/16D06M11/38D06M101/02
Inventor 钟春燕钟宇光
Owner 钟春燕
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