Carbon fiber with low cost and high strength

A high-strength, low-cost technology, applied in fiber chemical characteristics, textiles and papermaking, rayon manufacturing, etc., can solve the problems of lack of strength and rigidity of materials, high energy consumption of polyacrylonitrile, large loss of energy, etc., to achieve improved alignment and crystallinity, increasing carbon content, reducing the effect of oxidation temperature

Inactive Publication Date: 2020-11-13
ANHUI XUSHENG NEW CONCEPT MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the carbon fibers in the market are mostly made of polyacrylonitrile (PAN), and the production of PAN consumes a lot of energy and the process is very complicated. In the process of oxidizing the PAN precursor, the PAN must be Acrylonitrile filaments are heated to 200-300°C to oxidize them; next, they must be heated to 1200-1600°C to turn the atoms into carbon; finally, they must be heated to 2100°C to ensure that the molecules are properly aligned
This step is energy-intensive, but without this series of steps, the resulting material lacks the strength and rigidity it needs

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0027] Embodiments of the present invention also provide a method for preparing low-cost and high-strength carbon fibers, which includes the following steps:

[0028] Step 1: mixing and stirring acrylonitrile, methyl acrylate, itaconic acid, an initiator, a coagulation bath and a solvent, and undergoing a polymerization reaction to obtain a polyacrylonitrile spinning solution;

[0029] Step 2: adding the additive to the polymer spinning solution for stirring, filtering and defoaming to obtain the additive / polyacrylonitrile spinning solution;

[0030] Step 3: Spinning, drawing, washing, oiling, drying and heat-setting the additive / polyacrylonitrile spinning solution in order to obtain high-strength polyacrylonitrile precursors;

[0031] Step 4: Pre-oxidize and carbonize high-strength polyacrylonitrile precursors to obtain low-cost and high-strength carbon fibers.

[0032] Preferably, the stirring temperature in step 1 is 60-75° C., the stirring time is 2-5 hours, and cooling i...

Embodiment 1

[0037] The embodiment of the present invention provides a low-cost high-strength carbon fiber, which is prepared in parts by mass from the following raw materials: 45 parts of acrylonitrile, 4 parts of methyl acrylate, 2 parts of itaconic acid, carbon nanotubes 4 parts, 1 part of glycerol, 0.5 parts of ammonium sulfite, and 70 parts of a mixed solution of dimethylformamide and methylpyrrolidone.

[0038] Its preparation method comprises the following steps:

[0039] Step 1: Mix and stir the mixed solution of acrylonitrile, methyl acrylate, itaconic acid, ammonium sulfite, glycerol, dimethylformamide and methylpyrrolidone, the stirring temperature is 60°C, the stirring time is 3h, after Polymerization reaction, cooling to obtain polyacrylonitrile spinning solution;

[0040] Step 2: adding the carbon nanotubes into the polymer spinning solution for stirring, the stirring temperature is room temperature, and the stirring time is 4 hours, and after filtering and defoaming, the ca...

Embodiment 2

[0045] The embodiment of the present invention provides a low-cost high-strength carbon fiber, which is prepared from the following raw materials in parts by mass: 35 parts of acrylonitrile, 3 parts of methyl acrylate, 4 parts of itaconic acid, raw graphene 4 parts, 1 part of diethylene glycol, 1 part of ammonium persulfate, and 50 parts of a mixed solution of dimethylacetamide and dimethyl sulfoxide.

[0046] Its preparation method comprises the following steps:

[0047]Step 1: Mix and stir a mild solution of acrylonitrile, methyl acrylate, itaconic acid, ammonium persulfate, diethylene glycol, dimethylacetamide and dimethyl sulfoxide at a stirring temperature of 70°C for a stirring time of 4h, after polymerization, cooling to obtain polyacrylonitrile spinning solution;

[0048] Step 2: adding the original graphene to the polymer spinning solution for stirring, the stirring temperature is room temperature, the stirring time is 5h, after filtering and defoaming, the original ...

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Abstract

The invention relates to a carbon fiber with low cost and high strength. The carbon fiber is prepared from the components in parts by mass: acrylonitrile 10-50 parts, methyl acrylate 1-5 parts, itaconic acid 1-5 parts, an additive 0.1-5 parts, coagulation bath 0.1-2 parts, an initiator 0.1-1 part and a solvent 30-80 parts. The additive is at least one of carbon nanotubes and original graphene. Byadding at least one of carbon nanotubes and original graphene, the oxidation temperature of polyacrylonitrile precursor can be reduced, the energy consumption can be significantly reduced and cost inthe manufacturing process of carbon fiber can be reduced, and the produced carbon fiber has high tensile strength.

Description

technical field [0001] The invention relates to the technical field of carbon fiber, in particular to a low-cost high-strength carbon fiber and a preparation method thereof. Background technique [0002] At present, most of the carbon fibers in the market are mostly made of polyacrylonitrile (PAN), and the production of PAN consumes a lot of energy and the process is very complicated. In the process of oxidizing the PAN precursor, the PAN must be Acrylonitrile filaments are heated to 200-300°C to oxidize them; next, they must be heated to 1200-1600°C to turn the atoms into carbon; finally, they must be heated to 2100°C to ensure that the molecules are properly aligned. This step is energy-intensive, but without this series of steps, the resulting material lacks the strength and rigidity it needs. [0003] If the loss energy of oxidized polyacrylonitrile can be reduced without reducing the tensile strength of carbon fibers, low-cost and high-strength carbon fibers can be obt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22D01F1/10C08F220/46C08F220/14C08F222/02
CPCC08F220/46D01F1/10D01F9/225C08F220/14C08F222/02
Inventor 蔡福泉
Owner ANHUI XUSHENG NEW CONCEPT MATERIAL CO LTD
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