Online testing method for oil solution concentration of polyacrylonitile production used in carbon fiber

A polyacrylonitrile and carbon fiber technology, applied in the field of measurement, can solve the problems of time-consuming, cumbersome, low efficiency, etc., and achieve the effect of fast test method and improved timeliness

Active Publication Date: 2007-08-15
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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  • Online testing method for oil solution concentration of polyacrylonitile production used in carbon fiber

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] Example 1, online detection of oil concentration of a certain brand

[0028] 1. Obtain the standard curve of oil concentration and refractive index;

[0029] 1.1. Prepare the oil concentration standard solution; assume that the integer value of the measured oil concentration value is α%; then the number of prepared concentration standard solutions is at least 5, one of which is α%, and the remaining half of the concentration standard solution is α%. 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%; 12 points are selected in this example, and the specific content is shown in the table 1.

[0030] The concentration of table 1 oil agent concentration standard solution

[0031] Sample serial number

Concentration (%)

1

2.49966

2

2.993

3

...

example 2

[0046] Example 2, online detection of oil concentration of a certain brand

[0047] 1. Obtain the standard curve of oil concentration and refractive index;

[0048] 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 4.

[0049] The concentration of table 4 oil agent concentration standard solution

[0050] Sample serial number

Concentration (%)

1

9.97392

[0051] 2

11.988

...

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Abstract

This invention belongs to measurement technique and relates to one carbon fiber polyacryl-nitrile protofilament process oil agent concentration online test method, which is characterized by the following: it uses series oil agent work pool to feed materials tube or to exit pipe online reflection index meter for online test and comprises the steps as: getting oil agent concentration and reflection index or sugar degree standard curve; optimizing line equation; online testing.

Description

technical field [0001] The invention belongs to measurement technology, and relates to an online detection method of oil agent concentration 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, oiling, and dr...

Claims

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Application Information

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