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http://dx.doi.org/10.14478/ace.2014.1001

Hydrophobic Coating on Fish Feed Using Dielectric Barrier Discharge Plasma Polymerization  

Lee, Sang Baek (Department of Chemical and Biological Engineering, Jeju National University)
Hung, Trinhquang (Department of Chemical and Biological Engineering, Jeju National University)
Jo, Jin Oh (Department of Chemical and Biological Engineering, Jeju National University)
Jung, Jun Bum (School of Marine Biomedical Sciences, Jeju National University)
Im, Tae Heon (Department of Chemical and Biological Engineering, Jeju National University)
Mok, Young Sun (Department of Chemical and Biological Engineering, Jeju National University)
Publication Information
Applied Chemistry for Engineering / v.25, no.2, 2014 , pp. 174-180 More about this Journal
Abstract
A plasma hydrophobic coating on commercial fish feed was conducted to prolong the floating time of feed, thereby enhancing the feed consumption rate and reducing the contamination of water in fish farms. The hydrophobic coating on the fish feed was prepared using an atmospheric-pressure dielectric barrier discharge (DBD) plasma with hexamethyldisiloxane (HMDSO), toluene and n-hexane as the precursors. The effect of the parameters such as input power, precursor type and coating time on the coating performance were examined. The physicochemical properties of the coating layer were analyzed using a Fourier transform infrared (FTIR) spectrometer and a contact angle (CA) analyzer. The water CA increased after the coating preparation, indicating that the surface changed from hydrophilic to hydrophobic. The FTIR characterization revealed that the hydrophobic layer was comprised of functional groups such as $CH_3$, Si-O-Si and Si-C. As a result of the hydrophobic coating, the floating time of the fish feed increased from several seconds to 3 minutes, which suggested that the plasma coating method could be a viable means for practical applications. Compared to the water CA measured as soon as the coating layer was prepared, the 6-day aged sample exhibited a substantial CA increase, confirming the aging effect on the improvement of the hydrophobicity.
Keywords
plasma; hydrophobic coating; fish feed;
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