Strong Interface Construction of Carbon Fiber–reinforced PEEK Composites: An Efficient Method for Modifying Carbon Fiber with Crystalline PEEK

Yanchao Yang; Tianjiao Wang; Shengdao Wang; Xin Cong; Shuling Zhang; Mei Zhang; Jiashuang Luan

doi:10.1002/marc.202000001

journal article Apr 16, 2020

Strong Interface Construction of Carbon Fiber–reinforced PEEK Composites: An Efficient Method for Modifying Carbon Fiber with Crystalline PEEK

Yanchao Yang Tianjiao Wang

Shengdao Wang Xin Cong Shuling Zhang

Mei Zhang

Jiashuang Luan

Macromolecular Rapid Communications Vol. 41 No. 24 · Wiley

View at Publisher Save 10.1002/marc.202000001

Abstract

AbstractIn order to improve the poor solvent resistance and poor temperature resistance caused by traditional sizing agents, crystalline poly(ether ether ketone) (PEEK) is introduced to the interfacial phases of carbon fiber (CF) reinforced PEEK composites by a soluble precursor named PEEK‐1,3‐dioxolane. By changing the soluble precursor molecular weight and concentration in the sizing solution, the content of PEEK coated on the CF fiber surface can be controlled and the different interfacial properties of the PEEK composites can be obtained. The results shows that, with this method, crystalline PEEK can be completely coated on the CF surface, and the interfacial shear strength of the PEEK composites increases from 43.42 to 83.13 MPa. Due to none of any soluble compounds in the PEEK composites, the interfacial layer is well preserved under organic solvents and hygrothermal conditions, and the interfacial shear strength (IFSS) of the PEEK composites maintained above 85.4% and 90.44%, respectively. Scanning electron microscope clarifies that the mechanism of interface enhancement comes from a better wetting of crystalline PEEK on the fiber surface. Additionally, the sizing system of this investagation has the potential commercial value because of no toxic reagent (such as 2,4,5‐trichloro‐1‐hydroxy‐benzene or concentrated sulfuric acid) is required during sizing.

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References

Details

Published: Apr 16, 2020
Vol/Issue: 41(24)
License: View

Authors

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Yanchao Yang