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Continuous treatment method for improving surface performance of carbon fibers

A technology of surface properties and treatment methods, which is applied in fiber treatment, carbon fiber, ultrasonic/sonic fiber treatment, etc., can solve the problems of uneven surface structure performance, increase post-treatment process, and decrease in fiber strength, so as to achieve convenient preparation and improve carbon fiber Mechanical properties, performance-enhancing effects

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after soaking in ammonia water, it needs to be washed to remove the residual lye, which increases the post-treatment process, and also causes a decrease in fiber strength (about 5%)
[0007] Therefore, although the existing process methods can meet the requirements of improving the surface properties of carbon fibers to a certain extent, there are problems such as complex processes, long processing time, and uneven surface structure properties.

Method used

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  • Continuous treatment method for improving surface performance of carbon fibers
  • Continuous treatment method for improving surface performance of carbon fibers
  • Continuous treatment method for improving surface performance of carbon fibers

Examples

Experimental program
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Effect test

Embodiment 1～8

[0032] High-temperature carbonized carbon fiber is used as the raw material for surface treatment. The fiber specification is 12K, the bundle strength is 4.36GPa, and the modulus is 230GPa. Continuous surface treatment: wire speed, grafting liquid type and molar concentration, plasma gas type and flow rate, discharge Power, sizing agent mass concentration, and drying temperature, the process parameters are shown in Table 1; the sizing agent adopts bisphenol A epoxy resin emulsion type sizing agent (Shell EPON-828 and EPON-1001, the mass ratio of the two is 40 / 60) Finally roll up. The fiber properties after continuous surface treatment were tested, and the test results are shown in Table 2.

Embodiment 9

[0034] The carbon fiber after high temperature carbonization is adopted as the surface treatment raw material, the fiber specification is 24K, the bundle strength is 4.32GPa, and the modulus is 230GPa. The continuous surface treatment process parameters are shown in Table 1; EPON-828 and EPON-1001, the mass ratio of the two is 43 / 57), and finally wind up. The fiber properties after continuous surface treatment were tested, and the test results are shown in Table 2.

Embodiment 10

[0036] The carbon fiber after high temperature carbonization is adopted as the surface treatment raw material, the fiber specification is 48K, the bundle strength is 4.33GPa, and the modulus is 230GPa. The continuous surface treatment process parameters are shown in Table 1; EPON-828 and EPON-1001, the mass ratio of the two is 45 / 55), and finally wind up. The fiber properties after continuous surface treatment were tested, and the test results are shown in Table 2.

[0037] The surface treatment process parameter of table 1 embodiment 1-10

[0038]

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Abstract

The invention provides a continuous treatment method for improving the surface performance of carbon fibers, which comprises the following steps: firstly, coating carbon fibers subjected to high-temperature carbonization with a surface grafting solution, then carrying out surface treatment on the carbon fibers coated with the grafting solution in a plasma gas atmosphere, then sizing and drying the carbon fibers, and finally rolling. According to the carbon fibers treated through the continuous treatment method, surface active groups are increased, wettability is improved, sizing is rapid, film forming is uniform, surface energy is improved, surface defects of the treated fibers are reduced, tensile strength is improved, the treated fibers are good in bonding performance with resin, and the continuous treatment method is simple in procedure, easy to operate, rapid, efficient and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of improving fiber properties, in particular to a continuous treatment method for improving the surface properties of carbon fibers coated with grafting liquid by plasma treatment. Background technique [0002] Carbon fiber is a high-performance special fiber with high specific strength and specific modulus, good chemical stability, and low thermal expansion coefficient, so it is widely used in aerospace, satellite rockets, automobile industry, wind power, sports and leisure products, etc. field, and the global demand is increasing year by year. However, since its carbon content is more than 90% and there are very few surface active groups, it needs to be surface treated to enhance its interface adhesion with the matrix resin, so that the excellent performance of carbon fiber can be fully exerted in composite materials. . [0003] Surface treatment is an important process link in carbon fiber production. C...

Claims

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Application Information

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IPC IPC(8): D06M14/36D06M15/263D06M15/285D06M10/02D06M10/10D06M15/507D06M15/55D06M101/40
CPCD06M14/36D06M15/263D06M15/285D06M10/02D06M10/10D06M15/507D06M15/55D06M2101/40
Inventor 宋文迪黄翔宇吴嵩义袁玉红季春晓辛美音
Owner CHINA PETROLEUM & CHEM CORP
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