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T. Charinpanitkul,W. Suthabanditpong,H. Watanabe,T. Shirai,K. Faungnawakij,N. Viriya-empikul,M. Fuji 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.4
ZnO nanoparticles suspended in poly(acrylic acid) (PAA) were deposited onto layer-by-layer (LBL)polyelectrolyte (PET) films fabricated from poly(allylamine hydrochloride) (PAH) and PAA by dip coating method. Effect of etching time and concentration of ZnO suspension on hydrophilicity of the LBL-PET films before and after UV irradiation was examined using water contact angle measurement. 2.0 M PAH/PAA solutions with a dipping speed of 3.0 cm/min provided stable LBL-PET films with thickness sufficient for HCl etching. Glass substrates with the etched LBL-PET film dipped into 0.2 wt.% ZnO suspension exhibited the contact angle of 108 after irradiated by UV for 60 min.