Synthesis and Some Properties of Higher ω-Perfluoropropylalkanesulfonates

Abstract

A series of partially fluorinated alkane sulfonates (3 F), n-C3F7(CH2)nSOsNa (n:5N9) were synthesized. Some physicochemical properties.of these anionics were examined in comparison with those of the'follQwing three series of sulfenate containing a Similar number of carbon in the hydrophobe n-alkane (HC), . n-perfluoroalkane (PF) and to-trimethylsilylalkane (1 Si).
1) Krafft point of3 F was significantly lower than that of PF and close to those of HC and 1 Si.
2) CMC value of 3 F was nearly intermediate between that of PF and HC for the lowest member, h owever, the value was close to those of HC and 1 Si as the member inereased.
3) Ability of ioweriRg aqueous surface tension increased in theorder of HC 1 Si tsg; 3 F e PF and increased with increasing chain length among 3 F series.
4) Wetting efliciency (canvass disc test) increased in the order of HC ISi x 3 F and foaming power 3 F HC 1Si.
These results were discussed interms of the orientation and packing state of the to-perfluoroprepylated anionics adsorbed on aqueous surface and associated into micelle.