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Aggregation Behavior of Sugar Surfactants in Aqueous Solutions: Effects of Temperature and the Addition of Nonionic Polymers

, : Aggregation Behavior of Sugar Surfactants in Aqueous Solutions: Effects of Temperature and the Addition of Nonionic Polymers. Journal of Colloid and Interface Science 206(1): 158-167

The aggregation behavior, critical micelle concentration (cmc) and micelle aggregation number (N), of dodecyl maltoside (DM), octyl glucoside (OG), and Hecameg has been investigated in water and in water plus one of the three water-soluble polymers, polyoxyethylene (POE), polyoxypropylene (POP), and polyvinyl pyrrolidone (PVP), by means of florescence probing and time-resolved fluorescence quenching. The cmc of DM in water increased with temperature and showed a slight increase in the presence of POE. The aggregation number N of DM micelles was nearly independent of concentration (0.25-1 wt %) and temperature (16-60 degreesC). It remained invariant upon addition of 2 wt % POE or PVP but decreased slightly upon addition of the more hydrophobic POP. With increasing temperature, the cmc of OG decreased, went through a shallow minimum at around 35 degreesC, and increased. Addition of POE slightly increased the cmc in the whole temperature range. The aggregation number of OG micelles showed a fairly flat maximum at around 30 degreesC, and was unaffected by the presence of 2 wt % POE or PVP. However, N showed a complex dependence on temperature in the presence of POP, with lower values than in pure water below 15 degreesC, and rapidly increasing quencher-dependent values above this temperature. Hecameg was characterized by N-values nearly independent of temperature and concentration. Intermicellar exchanges of probe and/or quencher were observed with OG and Hecameg, but not with DM. The above results are compared to those for the nonionic ethoxylated surfactants. The effect of various parameters on the micelle aggregation number, the micelle polydispersity, the occurrence of sugar surfactant/nonionic polymer interactions, and the mechanisms responsible for the observed intermicellar exchanges are discussed. Copyright 1998 Academic Press.


PMID: 9761639

DOI: 10.1006/jcis.1998.5627

Other references

Montalvo, S.; Junoy, J.; Roldan, C.; Garcia-Corrales, P., 1997: Ultrastructural study of the proboscis endothelium of Riseriellus occultus (Nemertea, Heteronemertea). We have examined with transmission electron microscopy the epithelial layer exposed to the rhynchocoel fluid of the proboscis in the heteronemertine Riseriellus occultus. This epithelium is organized as a monociliated, pseudostratified myoepitheli...

Chabane A.; Boyer C., 1979: Volcanic series and copper mineralizations of the upper Precambrian of Tanguerfa, Anti-Atlas, Morocco. Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, Serie D: Sciences Naturelles: 1, Pages 5-8. 1979.

Anthony, J., 1947: Cortical protuberances of vascular origin on the brain of the elephant. Previous attempts to study the anatomy of the elephant brain have been unsatisfactory owing to the difficulty of fixation. It is possible, however, to fix the brain directly in the cranium. A preliminary study of an adult Indian elephant showed th...

Owades, Jl, 1981: The role of osmotic pressure in high and low gravity fermentations. Technical quarterly Master Brewers Association of the Americas 18(4): 163-165

MacLean, A.B.; Tsimpanakos, I., 2014: Vulva or Aidoio: Latin or Greek but avoid hybrid terms. Journal of Obstetrics and Gynaecology 33(7): 647-647

Manske, Richard H.F., 1941: A new source of cocositol. The leaves of Calycanthus floridus and of C. glaucus contain a polyhydric alcohol, C6H12O6, which has been identified as cocositol.

Guazzi, M.; Reina, G.; Tumminello, G.; Guazzi, M.D., 2005: Alveolar-capillary membrane conductance is the best pulmonary function correlate of exercise ventilation efficiency in heart failure patients. In heart failure (HF), changes in lung mechanics and gas diffusion are limiting factors to exercise. Their contribution to an increased exercise ventilation to CO2 production (VE/VCO2) slope is undefined. A total of 67 stable HF patients underwent...

Rubinson K., 1969: Retinal projections in the toad bufo marinus. Anatomical Record 163(2): 254

Gross, R.; Tabenkin, H.; Schoen, C.; Brammli-Greenberg, S.; Simantov, E., 2006: Health counseling for women in the absence of financial barriers: comparing reported counseling rates of women in the United States and Israel. This study compares rates of health counseling for women in the United States and Israel and identifies factors affecting counseling rates, based on a weighted sample of 2,257 US and 848 Israeli women. In both countries, fewer than half of the wom...

Hnatko, S.I., 1977: Alternatives to hexachlorophene bathing of newborn infants. In controlled trials newborn infants were bathed with Lactacyd, pHisoHex, Hibitane, Lanohex or tap water. Bacteriologic samples were taken from three sites (groin, axilla and cord) immediately after birth, following an initial bath with one of the...