SYNTHESIS OF BORON-CONTAINING NANOCOATINGS BY PLASMA ENHANCED CHEMICAL VAPOR DEPOSITION

Date

2025-11-24

Author

Yeşilyaprak , Elif Deniz

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

70
views

203
downloads

Cite This

This Master’s thesis focuses on the need for environmentally sustainable alternatives to per- and polyfluoroalkyl substances (PFAS) in hydrophobic coatings by developing novel boron-containing methacrylate-based monomers polymerized via plasma enhanced chemical vapor deposition (PECVD). Three distinct monomers were synthesized and characterized. The structural characterization was confirmed through ¹H NMR, ¹¹B NMR, ¹⁹F NMR, and FTIR. PECVD polymerization of these monomers yielded functional hydrophobic thin films on diverse substrates including bamboo fabric, tissue paper, carbon composite, and polyamide plates. Contact angle measurements demonstrated remarkable hydrophobic enhancement across all tested surfaces. The non-fluorinated polymer increased water contact angles from 84° to 117° on polyamide. The 12-fluorinated polymer exhibited superior performance, achieving contact angles of 138° on polyamide and 136° on tissue paper substrates. The 16-fluorinated polymer showed exceptional performance with contact angles reaching 130° on polyamide and 143° on tissue paper and bamboo fabric, demonstrating the highest overall hydrophobicity. X-ray photoelectron spectroscopy (XPS) analysis confirmed the incorporation of boron and fluorine elements in the polymer thin films, validating the retention of functional groups during PECVD processing. Scanning electron microscopy (SEM) revealed the morphological characteristics of the coatings on porous substrates, indicating successful deposition despite substrate complexity. This master thesis establishes boron-containing methacrylate monomers as promising PFAS-free alternatives for producing environmentally friendly hydrophobic coatings with tunable surface properties.

Subject Keywords

Boron-containing polymers, Hydrophobic coatings, Methacrylate, PECVD

URI

https://hdl.handle.net/11511/118249

Collections

Graduate School of Natural and Applied Sciences, Thesis