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Determination method of adhesion number of carbon fiber precursors

A technology of carbon fiber precursor and measurement method, which is applied in the field of carbon fiber, can solve the problems of lack of testing methods, etc., and achieve the effect of standard requirements, strong comparability and accurate measurement results

Active Publication Date: 2017-12-15
兰州蓝星纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there is still a lack of a fast and accurate test method for the adhesion of carbon fiber precursor monofilaments.

Method used

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  • Determination method of adhesion number of carbon fiber precursors
  • Determination method of adhesion number of carbon fiber precursors
  • Determination method of adhesion number of carbon fiber precursors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take the 1# line raw silk sample from the spinning workshop for testing:

[0023] (1) Preparation of fiber dispersant; prepare 100mL of 0.1% aqueous solution of Noigen EA-157 as fiber dispersant;

[0024] (2) intercept the 3mm fiber in a bundle of silk as the fiber sample to be tested, with a weight of 0.009g (a bundle is 24000);

[0025] (3) Transfer all the intercepted fiber samples to be tested to the fiber dispersant, and stir on a magnetic stirrer (100 revolutions / min); the fibers are evenly distributed in the solution;

[0026] (4) Quickly pour the stirred sample solution into the Buchner funnel (the diameter of the funnel is 12.5cm), and the filter paper is pre-laid in the Buchner funnel, and the sample solution does not exceed the edge of the filter paper; for the convenience of observation, black filter paper is used for the original silk ;Take out the filter paper after the dispersant is basically drained; the non-adhesive monofilaments will be evenly distrib...

Embodiment 2

[0031] Except that the raw silks tested were another batch of raw silks (the process parameters of spinning were adjusted to produce another batch of raw silks), other measurement methods were all the same as in Example 1. Cut the 3mm fiber in a bundle of silk as the fiber sample to be tested, with a weight of 0.009g (a bundle is 24000);

[0032] Test results: the adhesion filaments are very obvious on the filter paper and are easy to identify; the number of adhesions is 6, which can be seen figure 2 .

[0033] Sampling was repeated 5 times, and the test was carried out in the same way. The test results were: 5, 6, 6, 5, and 6. It can be seen that under the same process conditions, the batch of samples has more adhesions; the measurement results of the adhesion number are very stable and have good repeatability.

Embodiment 3

[0035] Take the pre-oxidized silk sample from the 1# line of the carbonization workshop for testing:

[0036] (1) Preparation of fiber dispersant; prepare 100mL of 0.1% aqueous solution of Noigen EA-157 as fiber dispersant;

[0037](2) intercept the 3mm fiber in a bundle of silk as the fiber sample to be tested, with a weight of 0.009g (a bundle is 24000);

[0038] (3) Transfer all the fiber samples intercepted to the fiber dispersant, stir on a magnetic stirrer, 100 rpm; make the fibers evenly distributed in the solution;

[0039] (4) Quickly pour the stirred sample solution into the Buchner funnel (funnel specification: diameter 12.5cm), and filter paper is laid in the Buchner funnel in advance. For the convenience of observation, use white filter paper for the pre-oxygenation silk; After drying, take out the filter paper; the non-adhesive monofilaments will be evenly distributed on the filter paper; the cohesive filaments will be obviously thicker than the surrounding mono...

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Abstract

The invention relates to a determination method of an adhesion number of carbon fiber precursors. The determination method belongs to the field of carbon fibers. The determination method comprises the following steps: (1) preparation of a fiber dispersing agent; (2) intercepting fiber samples; (3) transferring all the intercepted fiber samples into the fiber dispersing agent, and stirring the mixture with a magnetic stirrer to enable fibers to be uniformly distributed in the solution; (4) quickly pouring the stirred sample solution into a funnel; taking out filter paper after the dispersing agent is pumped out, so that non-adhesion monofibers can be uniformly distributed on the filter paper, and adhesion fibers are obviously thicker than the monofibers; (5) counting the number of the adhesion fibers on the filter paper. According to the determination method, the adhesion degree of the carbon fiber precursors can be fast determined. A determination process is accurate and controllable, requirements are standard, and an obtained result is accurate and reliable and is comparatively strong in comparability.

Description

technical field [0001] The invention relates to the field of carbon fibers, and more particularly, relates to a method for measuring the number of carbon fiber precursors bonded together. Background technique [0002] Carbon fiber is mainly obtained by high-temperature carbonization of polyacrylonitrile precursor, and the quality of carbon fiber depends to a large extent on the quality of polyacrylonitrile precursor. High-quality raw silk is the prerequisite for the production of high-performance carbon fibers. High-quality raw silk should have the characteristics of high purity, high strength, high degree of orientation, fine denier and no adhesion. The adhesion between the monofilaments of the fiber sample will cause the filaments to be oxidized during the pre-oxidation and subsequent carbonization process, and the carbonization will be uneven to form a skin-core structure, and it will also cause wool and broken filaments due to excessive local heat release. The adhesion...

Claims

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Application Information

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IPC IPC(8): G01N11/00
CPCG01N11/00
Inventor 王斐严华
Owner 兰州蓝星纤维有限公司
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