Role of the surface chemistry of plasma-polymer layers on their long-term anti-fogging behavior
Résumé
Long-term anti-fogging capability of plasma-coatings obtained from hydrophilic precursor, such as 2-(dimethylamino)ethyl methacrylate or acrylic acid, and hydrophobic monomer, 1H,1H,2H-perfluoro-1-decene, deposited on polycarbonate is studied for two different aging. These films, when freshly prepared, show simultaneous hydrophilicity / oleophobicity for HDFD concentrations < 50 %. They fulfill anti-fogging criteria: low water contact angle (< 20°), high hexadecane contact angle around 70° and preservation of optical transparency after water vapor contact. Depending on their chemical structure, only p-AA-co-HDFD with 20-40 % of HDFD retain their anti-fogging properties after a thermal aging while all of them are altered when dipped in hot water. p-AA-co-HDFD is more efficient than p-DAME-co-HDFD reducing airborne contamination and improving the long-term anti-fogging performance.
Domaines
Chimie
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