Amphiphilic diblock copolymers, Sz6 and Sz12, consisting of a polydimethylsiloxane block (average degree of polymerisation = 132) and a PEGylated−fluoroalkyl modified polystyrene block (Sz, average degree of polymerisation = 6, 12) were prepared by ATRP. Coatings were obtained from blends of either block copolymer (1–10 wt%) with a PDMS matrix. The coating surface presented a simultaneous hydrophobic and lipophobic character, owing to the strong surface segregation of the lowest surface energy fluoroalkyl chains of the block copolymer. Surface chemical composition and wettability of the films were affected by exposure to water. Block copolymer Sz6 was also blended with PDMS and a 0.1 wt% amount of multiwall carbon nanotubes (CNT). The excellent fouling-release properties of these new coatings against the macroalga Ulva linza essentially resulted from the inclusion of the amphiphilic block copolymer, while the addition of CNT did not seem to improve the fouling-release properties.
Amphiphilic block copolymer/PDMS blends and nanocomposites for release coatings of Ulva
GALLI, GIANCARLO;
2011-01-01
Abstract
Amphiphilic diblock copolymers, Sz6 and Sz12, consisting of a polydimethylsiloxane block (average degree of polymerisation = 132) and a PEGylated−fluoroalkyl modified polystyrene block (Sz, average degree of polymerisation = 6, 12) were prepared by ATRP. Coatings were obtained from blends of either block copolymer (1–10 wt%) with a PDMS matrix. The coating surface presented a simultaneous hydrophobic and lipophobic character, owing to the strong surface segregation of the lowest surface energy fluoroalkyl chains of the block copolymer. Surface chemical composition and wettability of the films were affected by exposure to water. Block copolymer Sz6 was also blended with PDMS and a 0.1 wt% amount of multiwall carbon nanotubes (CNT). The excellent fouling-release properties of these new coatings against the macroalga Ulva linza essentially resulted from the inclusion of the amphiphilic block copolymer, while the addition of CNT did not seem to improve the fouling-release properties.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
