Microwave properties of chlorinated viscose-based carbon fibers for X-band radars

Abstract

Viscose-based carbon fibers (VBCFs) were chlorinated with CCl₄ vapor to investigate the effect of chlorination temperature on their microwave properties. The maximum chlorine content of 2.0 mmol g⁻¹ was obtained at 450 °C. TEM and SEM showed carbon nanostructures and surface morphology preservation, respectively. TGA and TPD MS confirmed the formation of carbon-oxygen and chlorine-carbon groups, including CCl₃ groups. The prepared chlorinated VBCFs can effectively reflect X-band microwaves, with nearly constant reflection losses over a wide frequency range, and are characterized by minimum transmission losses of −22 dB.

Keywords:

• Chlorination
• electromagnetic radiation
• microwaves
• radiation-absorbent materials
• viscose-based carbon fibers

Acknowledgments

This work was supported by the Ministry of Education and Science of Ukraine: a Grant for the perspective development of the scientific direction: "Mathematical Sciences and Natural Sciences" at the Taras Shevchenko National University of Kyiv. Authors thanks to the project "University Science Park TECHNICOM for innovation applications supported by knowledge technologies" – Phase II, ITMS 313011D232.

Compliance with ethics guidelines

This article does not contain any studies with human or animal subjects performed by any of the authors.

Disclosure statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this article.

Data availability statement

The authors confirm that the data supporting the findings of this study are available within the article.