Manufacturing method of ternary ammonification modified T400-stage 12K carbon fiber

A carbon fiber manufacturing and modification technology, applied in the direction of fiber chemical characteristics, wet spinning method, stretch spinning method, etc., can solve the problems of severe fiber and brittle fiber breaking, and achieve high cohesion strength, increased orientation degree and crystallinity, The effect of excellent mechanical properties

Active Publication Date: 2013-07-03
XIAN KANGBEN MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the PAN-based precursors are pre-oxidized at (150-300) °C, and then directly enter the low-temperature carbonization process in a single temperature zone of 700 °C. Brittle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The present embodiment is a manufacturing method of T400 grade 12K carbon fiber modified by ternary ammoniation, and the specific process is:

[0040] Step 1, preparation of spinning solution. The spinning solution is a ternary copolymer spinning solution, which is prepared by free radical solution polymerization. The specific method is as follows: AN, IA, AS and initiator AIBN are used as solutes, and DMSO is used as solvent, and the DMSO is dimethyl sulfoxide, and the reaction solution is prepared. The weight ratio of AN, IA and AS is 98:1.5:0.5; the mass concentration of AIBN in the solute is 0.9%; the mass concentration of the solute in the reaction solution is 22%.

[0041] The reaction solution was pumped into the polymerization kettle through the pipeline to carry out the polymerization reaction, and was protected by nitrogen gas. The polymerization reaction temperature was 61° C., and the reaction time was 27 h to obtain a spinning solution. The obtained spinni...

Embodiment 2

[0064] This embodiment is a manufacturing method of T400 grade 12K carbon fiber modified by ternary ammoniation.

[0065] The specific process includes spinning solution preparation, spinning solution ammoniation and defoaming treatment, spinning solution filtration, preparation of precursor, pre-oxidation of precursor, low temperature carbonization, high temperature carbonization and post-treatment. The specific process of this example is the same as that of Example 1, and the parameters in the process of spinning solution ammoniation treatment, coagulation molding, and low-temperature carbonization are different.

[0066] The steps of this embodiment are:

[0067] Step 1, preparation of spinning solution. The preparation method of the spinning solution is the same as that described in step 1 of Example 1.

[0068] Step 2, the spinning solution is ammoniated and defoamed. The obtained spinning solution was pumped into an ammoniation tank through a pipeline, and the spinnin...

Embodiment 3

[0088] This embodiment is a manufacturing method of T400 grade 12K carbon fiber modified by ternary ammoniation.

[0089]The specific process includes spinning dope preparation, spinning dope ammoniation and defoaming treatment, spinning dope filtration, preparation of raw silk, pre-oxidation of raw silk, low temperature carbonization, high temperature carbonization and post-treatment. The specific process of this example is the same as that of Example 1, and the parameters in the process of spinning solution ammoniation treatment, coagulation molding, and low-temperature carbonization are different.

[0090] The steps of this embodiment are:

[0091] Step 1, preparation of spinning solution. The preparation method of the spinning solution is the same as that described in step 1 of Example 1.

[0092] Step 2, the spinning solution is ammoniated and defoamed. The obtained spinning solution was pumped into an ammoniation tank through a pipeline, and the spinning solution was ...

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Abstract

The invention relates to a manufacturing method of ternary ammonification modified T400-stage 12K carbon fiber. Acrylonitrile, itaconic acid and 2-acrylamido-2-methylpropanesulfonic acid are taken as copolymerization monomers for performing polymerization of a ternary free radical solution, ammonification modification is performed on an obtained spinning solution and then spinning is performed through a 12K spinning nozzle. 12K raw yarn is prepared by performing solidification, water washing, hot water drafting, oiling and drying on a tow, and then performing steam drafting and heat setting treatment. Pre-oxidation and carbonization treatment are further performed on the obtained raw yarn to prepare the carbon fiber. According to the manufacturing method disclosed by the invention, the non-toxic solid powder raw materials are taken as the copolymerization monomers, the ammonification modification treatment is performed on the spinning solution, the hydrophilicity and the draftability of the spinning solution obtained by the method are obviously improved, and the compactness, the orientation degree and the crystallinity of the obtained raw yarn after the spinning process are also obviously improved. After the pre-oxidation treatment of the raw yarn, gradient carbonization is performed in a low-temperature carbonization furnace at the temperature of 400-750 DEG C, drafting treatment is further performed, and the prepared carbon fiber has the advantages of high mechanical properties and strong binding force.

Description

technical field [0001] The invention relates to a method for manufacturing polyacrylonitrile (PAN)-based carbon fibers, in particular to a method for manufacturing large tow PAN-based carbon fibers. Background technique [0002] Carbon fiber has comprehensive and excellent properties such as light weight, high strength, high modulus, thermal conductivity, high temperature resistance, corrosion resistance, and low expansion. It is an ideal component of ablation-resistant functional composite materials and structural composite materials. (Space Shuttle), civil aircraft and other cutting-edge aerospace high-tech fields are playing an increasingly important role and are important basic materials for the sustainable development of the national economy. [0003] At present, the domestic production of PAN-based carbon fiber precursors usually adopts the free radical solution batch polymerization, wet one-step method of terpolymerization of acrylonitrile (AN), methyl acrylate (MA) a...

Claims

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Application Information

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IPC IPC(8): D01F9/22C08F220/46C08F8/30D01D5/06D01D5/14D01D10/02D01D10/06
Inventor 葛光涛刘红卫郭继荣张善营石磊
Owner XIAN KANGBEN MATERIAL
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