Polyurethane-based thin-film composites with carbon micro- to nanoscale fillers and their microwave properties

Abstract

Polyurethane-based thin-film composites (PUR-based TFCs) with different carbon fillers, namely, carbon flocs formed by carbon dots (CDs) containing O, N, and F heteroatoms and carbon nanotubes (CNTs), were prepared by hot pressing. The morphology and composition of the carbon fillers were investigated by SEM/EDX. Temperature-programmed desorption mass spectrometry and thermogravimetric analysis revealed that the CNTs have the highest thermostability among the fillers. Microwave studies in the X-band showed that the PUR-based TFCs with the CNTs were characterized by higher reflection losses and lower transmission losses than the PUR-based TFCs with the flocs formed by the studied CDs.

Keywords:

• Carbon floccules
• carbon nanotubes
• microwave properties
• polyurethane
• thin-film composites

Acknowledgments

This work has been supported in part by the Ministry of Education and Science of Ukraine: the Grant of the Ministry of Education and Science of Ukraine for the perspective development of a scientific direction: "Mathematical sciences and natural sciences" at the Taras Shevchenko National University of Kyiv. V. V. Lisnyak thanks to the project "University Science Park TECHNICOM for innovation applications supported by knowledge technologies" – Phase II, ITMS 313011D232 and acknowledges the partial support of the Ministry of Education and Science of Ukraine: Grant 0122U002023.

Disclosure statement

No conflicts of interest are disclosed by the authors.

Data availability statement

The corresponding author is willing to provide the datasets that were generated during and/or analyzed during this study.