Abstract
We synthesized 6 amphoteric surfactants of 2 families derived from N-dodecyl-N, N-dimethyl amine, N-dodecyl-N, N-diethanol amine and N-dodecyl-N, N-dipropanol amine, so called [F-1] N-dodecyl-N, N-dimethyl betain (abrv. C12B), N-dodecyl-N, N-diethanol betain (C12-DEB) and N-dodecyl-N, N-dipropanol betain (C12-DPB), and [F-2] N-dodecyl-N, N-dimethyl amine oxide (C12AO), N-dodecyl-N, N-diethanol amine oxide (C12-DEAO) and N-dodecyl-N, N-dipropanol amine oxide (C12-DPAO).
The surface activities and protein denaturing potency of C12-DEB, C12-DPB, C12-DEAD and C12-DPAO which have not well known, were measured on various concentrations in comparison with well known amphoterics C12B and C12AO.
The suface activities of C12-DEB and C12-DEAO showed almost the same level as C12B and C12AO, while C12-DPB and C12-DPAO showed a little poor than C12B and C12AO.
As to alubumin protein denaturing potencies of the surfacatants, C12-DEB, C12-DPB, C12-DEAO and C12-DPAO showed very lower level than C12B and C12AO which are popular amphoterics.
Among them we conclude that Ci2-DEB and C12-DEAO are useful for lower irritaive surfactants, which used for body shampoo and kitchen detergent.
