EFFECT OF ANTEISO-BRANCH MOIETY OF 18-MEA 517 CONCLUSIONS The following conclusions are based on the fi ndings reported in this paper: 1. The surface of alkaline-color-treated weathered hair treated with 18-MEA/SPDA complex can maintain its hydrophobicity even after one instance of shampooing with a plain shampoo, while the hair treated with n-HEA/SPDA or 19-MEA/SPDA complex cannot create a hydrophobic surface. The results indicate that the anteiso-branch moiety of 18-MEA is vital for providing persistent hydrophobicity to alkaline-color-treated weathered hair. 2. Characterization of adsorbed layers of 18-MEA/SPDA on a mica surface, as a possible hydrophilic surface model, was performed using AFM, although it might be open to question whether these surfaces behave differently due to the different compositions of these surfaces. The results reveal that the mechanism of the sustainable hydrophobicity of the hair surfaces generated by the anteiso-branch moiety of 18-MEA is that the anteiso- branch moiety of 18-MEA in 18-MEA/SPDA can produce higher fl uidity to the upper region of the 18-MEA/SPDA layer compared to the straight chain of n-HEA in n-HEA/ SPDA or the iso-branch moiety of 19-MEA in 19-MEA/SPDA. Table II Formulation of Conditioners 1 2 3 4 5 6 (control) Stearoxypropyldimethylamine 2 2 Dimethylaminopropylstearamide 2 Stearyltrimethylammonium chloride 2 Docosyldimethylamine 2 Stearoxyhydroxypropyldimethelamine 2 Benzyl alcohol 0.5 0.5 0.5 0.5 0.5 0.5 Stearyl alcohol 3 3 3 3 3 3 18-MEA 1 1 1 1 1 Lactic acid 0.3 0.3 0.3 0.3 0.6 Water Balance APPENDIX ERRATUM A previous paper (14) by the present authors [H. Tanamachi et al., Deposition of 18-MEA onto alkaline-color-treated weathered hair to form a persistent hydrophobicity, J. Cosmet. Sci., 60, 31–44 (2009)] contained an incorrect representation of Table II. The corrected table is reprinted below: REFERENCES (1) D. J. Evans, J. D. Leeder, J. A. Rippon, and D. E. Rivett, Separation and analysis of the surface lipids of the wool fi ber, Proc. 7th Int. Wool Text. Res. Conf., Tokyo, Japan, I, 135–142 (1985). (2) P. W. Wertz and D. T. Dowing, Integral lipids of human hair, Lipids, 23, 878–881 (1988). (3) P. W. Wertz and D. T. Dowing, Integral lipids of mammalian hair, Comp. Biochem. Physiol., 92B, 759– 761 (1989).
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