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Anton Manakhov, Miroslav Michlíček, David Nečas, Josef Polčák, Ekaterina Makhneva, Marek Eliáš, Lenka Zajíčková

Carboxyl-rich coatings deposited by atmospheric plasma co-polymerization of maleic anhydride and acetylene

Surface and Coatings Technology 295 (2016) 37-45

Carboxyl coatings are extensively used for adhesion promotion, bio-immobilization and surface reactions thanks to their reactivity towards nucleophilic groups and high wettability. The deposition of relatively stable carboxyl-rich coatings using low-cost atmospheric pressure plasma processes is still challenging. This work is aimed at the investigation of the plasma copolymerization of maleic anhydride (MA) and C2H2 by atmospheric pressure dielectric barrier discharge. The quantification of the carboxyl groups is performed by X-ray photoelectron spectroscopy (XPS) C1s curve fitting and by derivatization with trifluoroethanol. The layer synthesized at optimized monomer flow rate and plasma power contains 5 at.% of carboxyl groups (determined by derivatization combined with XPS) and exhibits the thickness loss below 5% after 128 h in water. The influence of the MA:C2H2 ratio on the layer chemistry, morphology and stability is analyzed.

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DOI: 10.1016/j.surfcoat.2015.11.039

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