The wettability of new amphiphilic block copolymer films was studied by measuring different types of water contact angles (static, receding, advancing, and most stable). The most stable contact angles were used to calculate the surface tensions of the films following the recently developed Marmur–Valal correlation. Most stable contact angles of water in an air-in-water system were also measured to study the changes in surface tension over relatively long periods of immersion time. The new approach yields surface tension values that are higher than those calculated by previous methods. The results suggest that reconstruction of the surface takes place at short time scale and continues to occur at long time scale. The responsive character of the polymer films can have implications for their use as biofouling release coatings.
Wettability and surface tension of amphiphilic polymer films: Time-dependent measurements of the most stable contact angle
GALLI, GIANCARLO;
2012-01-01
Abstract
The wettability of new amphiphilic block copolymer films was studied by measuring different types of water contact angles (static, receding, advancing, and most stable). The most stable contact angles were used to calculate the surface tensions of the films following the recently developed Marmur–Valal correlation. Most stable contact angles of water in an air-in-water system were also measured to study the changes in surface tension over relatively long periods of immersion time. The new approach yields surface tension values that are higher than those calculated by previous methods. The results suggest that reconstruction of the surface takes place at short time scale and continues to occur at long time scale. The responsive character of the polymer films can have implications for their use as biofouling release coatings.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
