| 초록 |
Recently, layer-by-layer assembly technique has gained attraction as a method to control surface wetting properties. In this study, LbL assembly of poly(ethylene-co-acrylic acid)(PEAC) ionomer and poly(allylamine hydrochloride)(PAH) was used to prepare hydrophobic surface. Film growth, surface morphologies, and wetting properties were studied. PEAC solution was prepared using mixture of tetrahydrofuran and water. pH of PEAC solution was chosen as 8.6 and 9.0 where stable PEAC dispersion was observed. pH of PAH solution was varied as 3.0, 5.0, 7.5, and 9.0. The LbL films grown successfully and showed rough porous structure when the pH of PAH was 7.5 and 9.0. In addition, the more rough and large porous structure was obtained when the pH of PEAC solution was 8.6. Water contact angle increase from 85° to 140° as the pH of PAH increased from 3.0 to 9.0. |
