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- W2351603978 abstract "Intermediate N,N-dimethyl-N'-(2-trifluorometyl-1-pentafluoroethyl) perfluoropropenyl ethane diamine was prepared with hexafluoropropene dimmer and 2-(dimethylamino) ethylamine,which was used to prepare four quaternary ammonium cationic fluorinated surfactants with bromoethane,1-bromobutane,1-bromohexane and 1-bromooctane respectively.The results of surface tension measurements indicated that all the four fluorinated surfactants displayed higher surface activity,and the minimum surface tension in aqueous solution were as low as 25 mN·m-1,which was better than the traditional hydrocarbon surfactants.According to the contact angle measurements,they could reduce the contact angle between water and ethylene terephthalate as well as paraffin to 20°,which was favorable for the spreading of water on the two interfaces.The effects of the size of hydrophilic group on the performance of these cationic fluorinated surfactants were discussed.It showed that the size of hydrophilic group was insignificantly to their surface activity while fluorocarbon chains could influence their surface activity and wetting properties dramatically on a count of strong hydrophobicity.The detailed differences between the behaviors of these surfactants could be explained from the arrangement form of hydrophobic groups and adsorption state on the air / water interface." @default.
- W2351603978 created "2016-06-24" @default.
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- W2351603978 date "2013-01-01" @default.
- W2351603978 modified "2023-09-25" @default.
- W2351603978 title "Synthesis and properties of fluorinated surfactants based on hexafluoropropene dimmer" @default.
- W2351603978 hasPublicationYear "2013" @default.
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