Synthesis and surface active properties of cationic surface active agents from crude rice bran oil

Cationic surfactants of 2-hidroxy-3-(2-alkylamidopolyethyl amino) propane-1-triethylammonium hydroxides (ix-xiii)(a-d) were prepared from fatty acids (i)(a-d) {[}palmitic, stearic, oleic, linoleic acid] and mixed fatty acids of crude rice bran oil i(e) {[}RBO]. The reaction of these acids with ethylenediamine, diethylenetriamine, triethylenetetramine and tetraethylenepentamine (ii)(a-d) produced (iii-vii)(a-d). The produced amidopolyethylamine (iii-vii)(a-d) reacted with 2-epoxypropylenetriethylammonium chloride (viii) to give the cationic surfactants (ix-xiii)(a-d). The produced derivatives were purified and characterized by microanalysis, molecular weight determination, infra-red (IR), and proton nuclear magnetic resonance (H-1 NMR) spectra. The surface active properties and inhibition efficiency of the prepared cationic surfactants were determined.