Abstract
A variety of fluorinated surfactants soluble in organic solvent were prepared, including C 8F 17SO 2NHC n H 2 n+1 ( n = 2, 4, 6, 8, 10), C 8F 17SO 2NHR (R = C 6H 11, C 6H 5), C 8F 17SO 2N(C n H 2 n+1 ) 2 ( n = 1, 2, 3, 4) and C 8F 17SO 2NH(CH 2) n NHO 2SC 8F 17 ( n = 6, 10). Their surface activities in various organic solvents were determined by surface tension measurement. The results showed that these fluorinated surfactants can reduce the surface tension of both polar and non-polar organic solvents. In general, organic solvents with strong polarity or long alkyl chain are beneficial to increase the surface activity of these polar fluorinated surfactants. By comparing fluorinated surfactants with the same fluorocarbon segment and connecting group, C 8F 17SO 2N(C n H 2 n+1 ) 2 ( n = 1, 2, 3, 4) showed lower surface activity in organic solvents than C 8F 17SO 2NHC n H 2 n+1 ( n = 2, 4, 6, 8) with an equal carbon number of the solvophilic group. Through surface tension vs. concentration curves given for N-octyl perfluorooctanesulfonamide in various organic solvents, a break point like the critical micelle concentration of ordinary surfactants in aqueous solutions was observed, and the effect of the different types of organic solvents on adsorption and aggregation behavior was also studied.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
