Abstract
The microstructure of the normal micelles formed by dimeric surfactants with long spacers, [Br−(CH3)2N+(C m H2 m +1)-(CH2) S -(C m H2 m +1)N+(CH3)2Br−, m = 10 and s = 8, 10 and 12], has been investigated by small-angle neutron scattering and compared with previously reported results for micelles of the same dimeric surfactants with shorter spacers (m = 10 and s = 2, 3, 4 and 6). It was found that for dimeric surfactants with long spacers (s = 8 and 10), both micellar growth and variation in shape occur to only a small extent, if at all, compared with dimeric surfactants with short spacers. However, for the dimeric surfactant with the longest spacer, s = 12, the extent of micellar growth and shape variation is also large. These results are due to the differences in conformation of dimeric surfactants with short spacers (s = 2–6) compared with that of the surfactants with long spacers (s = 8–12).
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Received: 15 June 1998 Accepted: 22 July 1998
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Hattori, N., Hirata, H., Okabayashi, H. et al. Small-angle neutron-scattering study of bis(quaternaryammonium bromide) surfactant micelles in water. Effect of the long spacer chain on micellar structure. Colloid Polym Sci 277, 95–100 (1999). https://doi.org/10.1007/s003960050373
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DOI: https://doi.org/10.1007/s003960050373