Enhanced Hydrophobic and Icephobic Performance of Fluorinated Polyurethane Nanocomposite Coatings Reinforced with Graphene Oxide Nanoparticles

This study investigates the enhanced hydrophobic and icephobic properties of polyurethane (PUR) nanocomposite coatings through the incorporation of fluorinated agents and graphene oxide (GO) nanoparticles. Traditional PUR coatings, while robust, exhibit inherent hydrophilicity due to polar functional groups. To address this, silane modifiers were replaced with a fluorinated compound (perfluorooctyltriethoxysilane, PFOTES) to reduce surface energy, while GO nanoparticles (۱-۵ wt%) were introduced to create hierarchical roughness and improve mechanical stability. Coatings were applied via spray deposition on aluminum substrates and characterized using SEM, XPS, contact angle measurements, and ice accretion tests. The optimized fluorinated GO-PUR coating achieved a static contact angle of ۱۲۸°, with ice accretion reduced to ۶۸% of uncoated aluminum, outperforming previous silica-silane systems. The composite retained ۹۵% of its initial hydrophobicity after ۱۰ frosting/defrosting cycles and demonstrated robust adhesion (critical load: ۱۸ N). These results highlight the synergistic role of fluorination and GO in creating durable, energy-efficient icephobic coatings, offering significant potential for aerospace and cold-climate applications.

کلیدواژه ها:

Fluorinated polyurethane (FPU) ، graphene oxide (GO) ، nanocomposite coatings ، hydrophobicity