In-situ and Post-cure Surface Modification of PDMS Elastomers for Low Surface Energy Applications.

摘要

Strategies aimed at promoting the formation of close-pack assemblies of fluoroalkyl helices on the surface of PDMS networks will be described and compared. Fluoroalkyl moieties were incorporated into Pt-catalyzed hydrosilylation networks in situ by using vinyl additives possessing either a single fluoroalkyl substituent, CH2=CH-(CF2)7CF3 (F8-vinyl), or eight ((methyl, vinyl)D1(F8H2)8T8 POSS or vinyl fluorodecyl POSS). Post-cure methods involving the incorporation of surface thiol groups and subsequent thiolene addition reactions were also explored for the facile production of PDMS networks with oleophobic surface properties. Synthetic routes and characterization of intermediates will be presented in addition to dynamic wettability analysis of modified PDMS networks.