| 초록 |
In present study, multilayers based on the hydrogen bonding between hydrophobically modified poly(ethylene oxide) (HM-PEO) and poly(acrylic acid) (PAA) have been prepared by the LbL deposition method. The three dimensional surface structure in the multilayer films was developed due to the micelle formation and aggregation of HM-PEO in aqueous solution. The formation of surface morphology is studied in terms of solvent polarity, temperature, molecular weight and composition of HM-PEO and preparation method (i.e., dip vs. spin-assisted deposition). It is also shown that the different surface morphology has a remarkable effect on the wetting behavior of water droplets. The water contact angle showed the maximum at an intermediate bilayer number and then decrease rapidly as the surface structure is evolved and amplified. In the case of the spin-assisted LbL, there is no such surface morphology independent of the bilayer number, presumably due to the disruption of micelles during spinning. |
