Journal
PLASMA PROCESSES AND POLYMERS
Volume 19, Issue 8, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppap.202200023
Keywords
atmospheric pressure plasma; crosslinkers; hydrophobicity; mechanical strength; plasma polymer
Funding
- Fonds National de la Recherche Luxembourg [FNR/BRIDGES2019/MS/13750980]
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Hydrophobic coatings based on DOCA and PFDA were prepared using postdischarge atmospheric pressure plasma deposition. The addition of HDMA and HDA crosslinkers showed different effects on the wettability and mechanical strength of the coatings.
Hydrophobic coatings based on dodecyl acrylate (DOCA) and perfluorodecyl acrylate (PFDA) have been generated via postdischarge atmospheric pressure plasma deposition. These coatings exhibit a water contact angle (WCA) of around 125 degrees but are accompanied by poor mechanical strength. To improve this property, two different types of chemical crosslinkers, that is, hexanediol methacrylate (HDMA) and hexanediol diacrylate (HDA), are incorporated into the precursor mixture. After plasma polymerization, both coatings with crosslinkers admixture show different wettability behavior. The addition of HDMA reduces the WCA while increasing the mechanical strength, while the addition of HDA retains the initial WCA magnitude while also increasing the mechanical strength. These changes are related to variations of the surface free energy (SFE) and topography of the plasma coatings.
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