ISSN:
1435-1536
Keywords:
Key words Long spacer
;
bis (quaternaryammonium bromide)
;
micelle
;
Small-angle-neutron scattering
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
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).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s003960050373
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