Materials
Sodium ricinoleate was purchased from TCI chemicals (Tokyo, Japan),
tetra butyl ammonium bromide (TBA-Br), tetra propyl ammonium bromide
(TPA-Br), cetyl trimethyl ammonium bromide (CTA-Br) and butyl hexyl
imodazolium bromide (BHI-Br) were purchased from Sigma Aldrich (St.
Louis, USA). Highest grade purity of solvents were purchased from SD
Fine Chemicals (Mumbai, India).