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Preparation method of alkali lignin-based porous carbon fiber and tin oxide composite nano material

A technology of composite nanomaterials and porous carbon fibers, which is applied in the fields of fiber chemical characteristics, fiber treatment, rayon manufacturing, etc., can solve the problems of complex preparation process and poor control of the shape of prepared materials, and achieve simple preparation methods, Rich pore structure, improving the effect of high-value applications

Active Publication Date: 2020-04-14
NORTHEAST FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most of the published carbon materials and metal oxide composite nano-energy storage materials have complicated preparation procedures, and the heat-treated materials need to undergo in-situ polymerization or hydrothermal reaction, etc., and the morphology of the prepared materials at this stage cannot be well understood. control

Method used

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  • Preparation method of alkali lignin-based porous carbon fiber and tin oxide composite nano material
  • Preparation method of alkali lignin-based porous carbon fiber and tin oxide composite nano material
  • Preparation method of alkali lignin-based porous carbon fiber and tin oxide composite nano material

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Embodiment 1

[0024] Embodiment 1: In the present embodiment, the preparation method of alkali lignin-based porous carbon fiber and tin oxide composite nanomaterial is carried out according to the following steps:

[0025] Step a. Dissolve 17g of alkali lignin and 17g of polyacrylonitrile in N-N-dimethylformamide (DMF), stir magnetically at 60°C and a stirring speed of 600r / min for 12h, and obtain a mass fraction of alkali lignin of 7 % of nuclear layer solution;

[0026] Step b, dissolving 40g of stannous chloride dihydrate and 25g of polyvinylpyrrolidone in a mixed solvent prepared by 200mL of DMF and 50mL of absolute ethanol, stirring magnetically at room temperature to obtain a shell solution;

[0027] Step c, divide the core layer solution and the shell layer solution into two different syringes, and carry out coaxial electrospinning, such as figure 1 As shown in (a); the fibers are collected on the aluminum foil, and its microscopic appearance is as follows figure 1 As shown in (b) ...

Embodiment 2

[0030] Embodiment 2: In the present embodiment, the preparation method of alkali lignin-based porous carbon fiber and tin oxide composite nanomaterial is carried out according to the following steps:

[0031] Step a. Dissolve 34g of alkali lignin and 34g of polyacrylonitrile in N-N-dimethylformamide (DMF), stir magnetically at 60°C and a stirring speed of 800r / min for 12h, and obtain a mass fraction of alkali lignin of 7 % of nuclear layer solution;

[0032] Step b, dissolving 40g of stannous chloride dihydrate and 25g of polyvinylpyrrolidone in a mixed solvent prepared by 200mL of DMF and 50mL of absolute ethanol, stirring magnetically at room temperature to obtain a shell solution;

[0033] Step c, the core layer solution and the shell layer solution are divided into two different syringes, and coaxial electrospinning is carried out, and the fibers are collected on the grounded aluminum foil. After the coaxial electrospinning is completed, the collected composite nanofibers ...

Embodiment 3

[0036] Embodiment 3: In the present embodiment, the preparation method of alkali lignin-based porous carbon fiber and tin oxide composite nanomaterial is carried out according to the following steps:

[0037] Step a. Dissolve 51g of alkali lignin and 51g of polyacrylonitrile in N-N-dimethylformamide (DMF), stir magnetically at 60°C and a stirring speed of 1000r / min for 12h, and obtain a mass fraction of alkali lignin of 7 % of nuclear layer solution;

[0038] Step b, dissolving 40g of stannous chloride dihydrate and 25g of polyvinylpyrrolidone in a mixed solvent prepared by 200mL of DMF and 50mL of absolute ethanol, and stirring magnetically at room temperature to obtain a shell solution;

[0039] Step c, the core layer solution and the shell layer solution are divided into two different syringes, and coaxial electrospinning is carried out, and the fibers are collected on the grounded aluminum foil. After the coaxial electrospinning is completed, the collected composite nanofi...

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Abstract

The invention discloses a preparation method of an alkali lignin-based porous carbon fiber and tin oxide composite nano material, and belongs to the technical field of energy storage materials. According to the method, the consumption of petroleum resources is reduced, a carbon nano material with excellent performance is prepared, and meanwhile, the high-value application of lignin is improved. The porous carbon fiber and tin oxide composite nano material is prepared by taking alkali lignin as a main carbon source and tin chloride as a precursor through the combination of coaxial electrostaticspinning and heat treatment, and the material has huge application potential in the energy storage field. According to the method disclosed by the invention, the current situation that the conventional carbon fiber takes polyacrylonitrile as the unique carbon source is changed, and meanwhile, the method for preparing the composite nano energy storage material is simple, the operability is high, and the prepared material is controllable in morphology.

Description

technical field [0001] The invention belongs to the technical field of energy storage materials; in particular, it relates to a preparation method of alkali lignin-based porous carbon fiber and tin oxide composite nanomaterials. Background technique [0002] As one of the three major components of wood, lignin is second only to cellulose in storage in nature, and has the advantages of being environmentally friendly, renewable, and high in carbon content. However, lignin monomers have various types and compositions, and are a kind of three-dimensional, non-crystalline phenolic polymers. It is this complex amorphous structure that limits the application of lignin in industry. Most of the lignin produced in agricultural waste and papermaking wastewater is used to provide heat energy, which has low utilization rate and is not conducive to environmental protection. Functional application is extremely important. [0003] Carbon fiber is a carbon material with high mechanical str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22D01F9/17D01F1/10D01F1/08D01D5/00
CPCD01F9/22D01F9/17D01F1/10D01F1/08D01D5/0092D01D5/0076D01D5/003
Inventor 韩广萍曹美莲程万里倪晓慧牛兆轩黄佳琪
Owner NORTHEAST FORESTRY UNIVERSITY
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