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Method for detecting concentration of oil solution in producing polyacrylonitrile raw yarn in use for carbon fiber

A technology of polyacrylonitrile and carbon fiber, which is applied in the field of measurement, can solve problems such as time-consuming, cumbersome, and low efficiency, and achieve the effect of being suitable for large-scale promotion and fast test methods

Active Publication Date: 2009-02-04
WEIHAI TUOZHAN FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To overcome the traditional chemical method's tedious, time-consuming and low-efficiency shortcomings, improve the dynamics and accuracy of oil concentration control in the production process of polyacrylonitrile raw silk, and lay the foundation for automatic control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] Example 1, rapid detection of oil concentration of a certain brand

[0027] 1. Obtain the standard curve of oil concentration and refractive index;

[0028] 1.1. Prepare the oil concentration standard solution; if the integer value of the measured oil concentration value is α%, then the prepared concentration standard solution must have at least 5, one of which is α%, and the remaining half of the concentration standard solution is α%. If the value is less than α%, the value of the other half of the concentration standard solution is greater than α%, and the distance between the concentration values ​​of two adjacent standard solutions is 0.1*α%~0.5*α%; 6 points are selected in this example, and the specific content is shown in the table 1.

[0029] Table 1 Concentration value of concentration standard solution

[0030] Sample serial number

Concentration (%)

1

0.09728

2

0.20429

3

0.30372

4

0.395...

example 2

[0042] Example 2, rapid detection of oil concentration of a certain brand

[0043] 1. Obtain the standard curve of oil concentration and sugar content;

[0044] 1.1. Prepare oil concentration standard solution; use the same raw materials in the production of polyacrylonitrile raw silk for carbon fiber to prepare different concentrations of oil standard solution; if the integer value of the measured oil concentration value is α%, then the prepared concentration The number of standard solutions is at least 5, one of which is α%, the value of the other half of the concentration standard solutions is less than α%, and the value of the other half of the concentration standard solutions is greater than α%, and the distance between two adjacent standard solution concentration values ​​is 0.1*α%~0.5*α%; 11 points are selected in this example, see Table 4 for details.

[0045] Table 4 Concentration value of concentration standard solution

[0046] Sample serial number

C...

example 3

[0058] Example 3, rapid detection of oil concentration of a certain brand

[0059] 1. Obtain the standard curve of oil concentration and refractive index;

[0060] 1.1. Prepare the oil concentration standard solution; if the integer value of the measured oil concentration value is α%, then the prepared concentration standard solution must have at least 5, one of which is α%, and the remaining half of the concentration standard solution is α%. If the value is less than α%, the value of the other half of the concentration standard solution is greater than α%, and the distance between the concentration values ​​of two adjacent standard solutions is 0.1*α%~0.5*α%; 10 points are selected in this example, and the specific content is shown in the table 7.

[0061] Table 7 Concentration value of concentration standard solution

[0062] Sample serial number

[0063] 1.2. Measure the refractive index of the standard solution; use a digital refractometer to measure the refra...

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Abstract

A method for detecting concentration of oiling agent in production of polyacry / onitrile raw filament being used to prepare carbon fiber includes obtaining concentration and refractive power of oiling agent, optimizing linear equation, sampling, measuring refractive power and converting measured refractive power to be concentration.

Description

technical field [0001] The invention belongs to the measurement technology and relates to the improvement of the oil agent concentration detection method in the production process of polyacrylonitrile raw silk for carbon fiber. Background technique [0002] Polyacrylonitrile-based carbon fibers have the characteristics of high specific strength, high specific modulus, high temperature resistance, corrosion resistance, creep resistance, and strong stability. They are widely used in various fields such as aerospace, mechanical electronics, chemical building materials, and energy transportation. Applications. The production of polyacrylonitrile-based carbon fiber includes two major links: production of polyacrylonitrile precursor and carbonization of precursor, among which the production of precursor is the key link. Sex is decisive. The production of polyacrylonitrile raw silk includes multiple processes such as polymerization, defoaming, single removal, spinning, washing, o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/41G01N33/00
Inventor 景朝俊李书乡
Owner WEIHAI TUOZHAN FIBER
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