| 초록 |
Many researches have been underway on the spreading behavior of the liquid / liquid interface driven by the difference in surface tension. From this spreading behavior, we developed a novel technique of thin polymer film formation by using the difference of surface tensions at an air-liquid interface: a spontaneous spreading (SS) process. In this study, we measured the surface tension and interfacial tension of the polystyrene solutions with different molecular weights and density to investigate the factors governing the spreading behavior. We discover the interfacial tension of the polymer solutions mainly determine whether it can make a stable membrane on water surface as the change in the interfacial tension is greater than the change in the surface tension. Thus, we improved the spreading behavior and film stability by selecting an additive, which can selectively control the interfacial tension. These results are expected to diversify the types of polymers used in the SS process. |
