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Bacterial cellulose-plant fiber composite conductive paper as well as preparation method and application thereof

A technology of bacterial cellulose and plant fibers, which is applied in non-fibrous pulp addition, fiber raw material treatment, hybrid capacitor electrodes, etc. The effect of improving the specific capacitance retention rate, enhancing the uniformity and stability

Active Publication Date: 2020-04-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stability of the paper electrode prepared by this method is not high enough, and the capacitance is poor

Method used

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  • Bacterial cellulose-plant fiber composite conductive paper as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0036] Bacterial cellulose is secreted by Glucoacetobacter xylinus. The main components of the bacterial culture medium are: 50 mL of fermented coconut water, 0.1 g of ammonium sulfate, 0.1 g of magnesium sulfate, 0.1 g of potassium dihydrogen phosphate, 3.0 g of sucrose, 50 mL of distilled water, adjust the pH value to 4.1 with NaOH, and sterilize at 100 ° C for 5 min . A static fermentation culture method is adopted, the culture medium is placed in a 250 mL beaker, inoculated with 5% (V / V) gluconacetobacter, and the temperature is 30° C. for static culture for 6 days. The obtained bacterial cellulose wet film had a solid content of 1.5 wt%.

[0037] Cut 30 g of bacterial cellulose (BC) wet film into small pieces of 1 cm × 1 cm × 0.8 mm, and crush it 3 times in the instant mode with a laboratory mixer. The disintegrated BC and 60mL NaOH solution (1M) were mixed and poured into an Erlenmeyer flask, and activated with magnetic stirring at room temperature for 3h. Mix it with...

Embodiment 2

[0041] Bacterial cellulose is secreted by Glucoacetobacter xylinus. The main components of the bacterial culture medium are: 50 mL of fermented coconut water, 0.1 g of ammonium sulfate, 0.1 g of magnesium sulfate, 0.1 g of potassium dihydrogen phosphate, 3.0 g of sucrose, 50 mL of distilled water, adjust the pH value to 4.1 with NaOH, and sterilize at 100 ° C for 5 min . A static fermentation culture method is adopted, the culture medium is placed in a 250 mL beaker, inoculated with 5% (V / V) gluconacetobacter, and the temperature is 30° C. for static culture for 6 days. The obtained bacterial cellulose wet film had a solid content of 1.5 wt%.

[0042] Cut 30 g of bacterial cellulose (BC) wet film into small pieces of 1 cm × 1 cm × 0.8 mm, and crush it 3 times in the instant mode with a laboratory mixer. Suspend the disintegrated BC in 100 mL of aqueous solution containing 0.48 g of 2,2,6,6-tetramethylpiperidine-nitrogen-oxide (TEMPO) and 3 g of sodium bromide, by adding NaCl...

Embodiment 3

[0047] Bacterial cellulose is secreted by Glucoacetobacter xylinus. The main components of the bacterial culture medium are: 50 mL of fermented coconut water, 0.1 g of ammonium sulfate, 0.1 g of magnesium sulfate, 0.1 g of potassium dihydrogen phosphate, 3.0 g of sucrose, 50 mL of distilled water, 5 mL of diethylenetriamine, and sterilized at 100°C for 5 minutes. A static fermentation culture method is adopted, the culture medium is placed in a 250 mL beaker, inoculated with 5% (V / V) gluconacetobacter, and the temperature is 30° C. for static culture for 6 days. The obtained diethylenetriamine-modified bacterial cellulose wet film had a solid content of 2.1 wt%.

[0048] Diethylenetriamine-modified bacterial cellulose (Bacterial Cellulose, BC) wet film 30g was cut into small pieces of 1cm × 1cm × 0.8mm, and crushed 3 times in the instant mode by a laboratory mixer. After the reaction is completed, the product is filtered and washed, mixed with the secondary fiber pulp at a ma...

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Abstract

The invention discloses bacterial cellulose-plant fiber composite conductive paper as well as a preparation method and an application thereof. According to the method, bacterial cellulose and plant fibers are compounded into paper, and then conductive filler is loaded on the composite paper through an impregnation method or a coating method to prepare the conductive paper. The bacterial celluloseis cellulose secreted and synthesized by bacterial microorganisms or modified bacterial cellulose. The conductive filler is the filler with conductivity such as carbon nanotubes, silver nanowires, carbon fibers and graphene. The plant fiber pulp is a papermaking pulp raw material prepared from wood fibers, non-wood plant fibers or secondary fibers through a mechanical or chemical pulping method and the like, and comprises hardwood pulp, softwood pulp, bagasse pulp, bamboo pulp, straw pulp, secondary fiber pulp and the like. The conductive paper prepared by the method has the advantages of simplicity in preparation, strong conductivity, high mechanical stability, low leaching rate of the conductive filler, strong recycling capability and the like, and has excellent performance in application of paper-based conductors, paper-based electrodes, paper-based capacitors and the like.

Description

technical field [0001] The invention relates to the field of conductive paper, in particular to bacterial cellulose-plant fiber composite conductive paper and a preparation method and application thereof. Background technique [0002] Paper-based materials have the advantages of low cost, degradability, low density, and good flexibility. In addition, paper is a cellulose-based carrier structure, and its porous structure endows ions with good accessibility, so that it can be used in supercapacitors. areas play an important role. However, the conductive filler has a large specific surface area, and is easy to agglomerate in the paper-based material and aqueous solution, reducing the recyclability of the paper-based material. Moreover, cellulose has strong hydrophilicity. In aqueous solution, the hydrogen bonds between fibers are destroyed, resulting in dissociation of the fiber structure, which greatly affects its recycling ability. [0003] Bacterial cellulose is a special ...

Claims

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Application Information

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IPC IPC(8): D21H17/25D21H17/67D21H17/09D21H21/14H01G11/30
CPCD21H17/25D21H17/67D21H17/09D21H21/14H01G11/30Y02E60/13
Inventor 项舟洋吴潇吕发创
Owner SOUTH CHINA UNIV OF TECH
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