Waste silk-based flexible carbon nanofiber membrane and preparation method thereof

A carbon nanofiber, nanofiber membrane technology, applied in fiber processing, rayon manufacturing, fiber chemical characteristics, etc., can solve the problems of low comprehensive utilization rate of waste silk, environmental pollution, waste of resources, etc., and achieve easy control of reaction conditions and The effect of realizing, avoiding environmental pollution and reducing damage

Inactive Publication Date: 2020-10-09
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the comprehensive utilization rate of waste silk is still very low, and the main treatment methods are still traditional incineration and landfill, which will cause serious environmental pollution and waste of resources

Method used

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  • Waste silk-based flexible carbon nanofiber membrane and preparation method thereof
  • Waste silk-based flexible carbon nanofiber membrane and preparation method thereof
  • Waste silk-based flexible carbon nanofiber membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A method for preparing a waste silk-based flexible carbon nanofiber film, the specific steps of the method are as follows:

[0056] (1) Pre-treatment of waste silk:

[0057] Ⅰ. Dissolve 2 g of sodium carbonate, 2 g of sodium bicarbonate, and 1 g of soap in 500 mL of deionized water, add 10 g of discarded cocoons, and degumming-refining at 95 °C for 1 h to obtain silk fibroin.

[0058] Ⅱ. Dissolve 5 g of anhydrous calcium chloride in 100 g of formic acid, then add 10 g of silk fibroin, and stir at room temperature for 5 h to obtain a silk fibroin solution.

[0059] Ⅲ. Pour the silk fibroin solution into a dialysis bag (molecular weight cut-off: 8000-14000 Da), dialyze with deionized water for 3 days, remove calcium chloride and formic acid by centrifugation, and obtain pure silk fibroin.

[0060] Ⅳ. The pure silk fibroin solution after dialysis was frozen at -25°C for 24 hours, and then freeze-dried at a temperature of -50°C and a pressure of 40 Pa for 24 hours to obtai...

Embodiment 2

[0065] A method for preparing a waste silk-based flexible carbon nanofiber film, the specific steps of the method are as follows:

[0066] (1) Pre-treatment of waste silk:

[0067] Ⅰ. Dissolve 2 g of sodium carbonate, 2 g of sodium bicarbonate, and 1 g of soap in 500 mL of deionized water, add 10 g of discarded cocoons, and degumming-refining at 95 °C for 1 h to obtain silk fibroin.

[0068] Ⅱ. Dissolve 5 g of anhydrous calcium chloride in 100 g of formic acid, then add 10 g of silk fibroin, and stir at room temperature for 5 h to obtain a silk fibroin solution.

[0069] Ⅲ. Pour the silk fibroin solution into a dialysis bag (molecular weight cut-off: 8000-14000 Da), dialyze with deionized water for 3 days, remove calcium chloride and formic acid by centrifugation, and obtain pure silk fibroin.

[0070] Ⅳ. The pure silk fibroin solution after dialysis was frozen at -25°C for 24 hours, and then freeze-dried at a temperature of -50°C and a pressure of 40 Pa for 24 hours to obtai...

Embodiment 3

[0075] A method for preparing a waste silk-based flexible carbon nanofiber film, the specific steps of the method are as follows:

[0076] (1) Pre-treatment of waste silk:

[0077] Ⅰ. Dissolve 2 g of sodium carbonate, 2 g of sodium bicarbonate, and 1 g of soap in 500 mL of deionized water, add 10 g of waste silk fiber, and degumming-refining at 95 °C for 1 h to obtain silk fibroin.

[0078] Ⅱ. Dissolve 5 g of anhydrous calcium chloride in 100 g of formic acid, then add 10 g of silk fibroin, and stir at room temperature for 5 h to obtain a silk fibroin solution.

[0079] Ⅲ. Pour the silk fibroin solution into a dialysis bag (molecular weight cut-off: 8000-14000 Da), dialyze with deionized water for 3 days, remove calcium chloride and formic acid by centrifugation, and obtain pure silk fibroin.

[0080] Ⅳ. The pure silk fibroin solution after dialysis was frozen at -25°C for 24 hours, and then freeze-dried at a temperature of -50°C and a pressure of 40 Pa for 24 hours to obtain...

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Abstract

The invention relates to a preparation method of a novel carbon-based nano material, in particular to a waste silk-based flexible carbon nanofiber membrane and a preparation method thereof, and belongs to the technical field of carbon-based nano materials. The preparation method comprises the following steps of: firstly, pretreating waste silk, including degumming-refining, dissolving, dialyzing,freeze-drying and the like, to obtain dried silk fibroin; secondly, mixing and dissolving the silk fibroin and transition metal salt into formic acid to obtain a spinning solution, and preparing a silk fibroin-based nanofiber membrane through electrostatic spinning or centrifugal spinning; and finally, obtaining the flexible carbon nanofiber membrane through pre-oxidation and carbonization processes. The material has high electrical conductivity and mechanical flexibility, and can be applied to the fields of energy storage, catalysis, sensing and the like.

Description

technical field [0001] The invention relates to a preparation method of a novel carbon-based nanometer material, in particular to a waste silk-based flexible carbon nanofiber film and a preparation method thereof, belonging to the technical field of carbon-based nanometer materials. Background technique [0002] Carbon-based nanomaterials have the characteristics of abundant resources, high electrical conductivity, good chemical stability, excellent mechanical properties and environmental friendliness, so they are widely used in the field of energy storage and conversion. Common carbon-based nanomaterials include graphene, carbon nanotubes, carbon nanofibers, graphene quantum dots, etc. Although these carbon-based nanomaterials have good electrical conductivity, they can meet the basic needs of energy storage and conversion. However, the raw materials of the above-mentioned carbon-based nanomaterials are mostly fossil raw materials such as PAN, petroleum, asphalt, etc., whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4242D04H1/728D04H3/002D04H3/02D01D5/00D01F4/02D01F1/10
CPCD01D5/003D01F1/10D01F4/02D04H1/4242D04H1/728D04H3/002D04H3/02D10B2401/16
Inventor 潘鹏胡毅王子希张亚茹
Owner ZHEJIANG SCI-TECH UNIV
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