抄録
Quaternary ammonium salts were prepared from pyridine or triethylamine and higher n-alkyl (C10-C16) monochloroacetates and their surface activities were determined.
Pyridinium salts were superior than the triethylammonium salts in surface tension, foaming property and wettability, especially the salt containing C12-alkyl group showed better surface activity than other salts and the value of its surface tension was 26.9 dyne/cm in 0.2% aqueous solution. The triethylammonium salt with C16-alkyl group showed 38.2-40.8 dyne/cm in the solution of 0.05-0.5%.
Pyridinium salts containing C12 and C14-alkyl groups showed good emulsifying power for benzene and kerosene and the salt with C16-alkyl group had good emulsifying power for soy bean oil. Triethylammonium salts were also found to have good emulsifying power for each of tested oils according to the choice of alkyl group as follows ;
for benzene : C16H33 > C12H25 > C10H21 > C14H29
for kerosene : C12H25> C14H29 > C10C21 > C16H33
for soy bean oil : C16H33 > C12H25 > C14H29 > C10H21
