Wettability of Polyhedral Oligomeric Silsesquioxane Nanostructured Polymer Surfaces

✍ Scribed by Stefano Turri; Marinella Levi

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 130 KB
• Volume: 26
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200500274

✦ Synopsis

Abstract

Summary: Some model structures of waterborne polyurethane anionomers containing various amounts (ca. 3–20%) of a diol functionalized polyhedral oligomeric silsesquioxane (POSS) nanofiller were prepared. X‐ray diffraction showed the formation of a nanocrystalline structure in all copolymers considered. Static contact angle measurements indicated a significant enhancement of surface hydrophobicity as well as reduction in surface tension components even at the least POSS level (3%). Dynamic contact angle cycles allowed the evaluation of the hysteresis, which was found to be large and kinetically increasing in POSS‐modified samples. Film topography was analyzed by AFM, showing a more pronounced roughness in the nanostructured surface.

The AFM image showing a moderate roughness increase.

magnified imageThe AFM image showing a moderate roughness increase.