Synthesis and Foam-Dissipation Effect of Novel Fluorosilicone Oligomers
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概要
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Five sorts of fluorosilicone oligomers having different fluorooxaalkyl groups (R<SUB>F</SUB>) and siloxane chain lengths were synthesized by the reaction of vinyl group-containing poly (dimethyl siloxane) <SUB>s</SUB> (VPSs) with bis (fluorooxaalkanoyl) peroxides. Unmodified VPSs were not able to dissipate bubbles caused by sodium dodecyl sulfate in aqueous solutions, while modified VPSs dissipated them did quite well. The foam-dissipation effect was almost independent of RF chain and siloxane chain lengths in the fluorosilicone oligomers, but fairly dependent of their concentrations. From a dynamic surface tension measurements, it was found that the foam-dissipation effect by the fluorosilicone oligomers is closely related to their adsorption rates to an air/water interface.
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