Abstract
Static light scattering has been measured for aqueous NaCl solutions of cetyltrimethylammonium chloride (CTAC) at 25 °C. While spherical micelles are formed above the critical micelle concentration for 0–1.5 M NaCl solutions, rodlike micelles are formed at NaCl concentrations higher than 1.18 M.
The aggregation number of rodlike micelles increases markedly with increasing NaCl concentration, and it is as large as 11400 in 4.0 M NaCl. Long rodlike micelles are semiflexible and behave like wormlike chains. Their contour length and persistence length have been calculated as 630 and 46.4 nm, respectively, in 4.0 M NaCl.
Rodlike micelles overlap and entangle together to form a network in semidilute solutions above a threshold micelle concentration. The radius of gyration of the blob can be scaled for its molecular weight with the exponent, 0.55, coinciding with that for isolated rodlike micelles in dilute solutions. The scaling laws for the reciprocal envelope of light scattered in the semidilute regime and for the molecular weight and the radius of gyration of the blob are also discussed with reference to the micelle concentration.
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Imae T, Kamiy R, Ikeda S (1985) J Coll Interf Sci 108:215
Imae T, Ikeda S (1986) J Phys Chem 90:5216
Ozeki S, Ikeda S (1982) J Coll Interf Sci 87:424
Ozeki S, Ikeda S (1981) Bull Chem Soc Jpn 54:552
Appell J, Porte G, Poggi Y (1982) J Coll Interf Sci 87:492
Flamberg A, Pecora R (1984) J Phys Chem 88:3026
Imae T, Ikeda S (1984) Coll & Polym Sci 262:497
Van De Sante W, Persoons A (1985) J Phys Chem 89:404
Imae T, Ikeda S (1985) Coll & Polym Sci 263:756
Kratky O, Porod G (1949) Roc Trav Chim 68:1106
de Gennes PG (ed) (1979) Scaling Concepts in Polymer Physics, Cornell Univ Press, Ithaca London
Candau SJ, Hirsch E, Zana R (1984) J Phys, Paris 45:1263
Candau SJ, Hirsch E, Zana R (1985) J Coll Interf Sci 105:521
Reiss-Husson E, Luzzati V (1964) J Phys Chem 68:3504
Hayter JB, Penfold J (1983) Coll & Polym Sci 261:1022
Roelants E, Geladé E, Van Der Auweraer M, Croonen Y, De Schryver FC (1983) J Coll Interf Sci 96:288
Dorshow RB, Bunton CA, Nicoli DF (1983) J Phys Chem 87:1409
Roelants E, Geladé E, Smid J, De Schryver FC (1985) J Coll Interf Sci 107:337
Malliaris A, Le Morgne J, Zana R (1985) J Phys Chem 89:2709
Abe A, Imae T, Ikeda S (1987) Coll & Polym Sci 265:637
Ekwall P, Mandell L, Solyom P (1971) J Coll Interf Sci 35:519
Sepúlveda L, Cortés J (1985) J Phys Chem 89:5322
Zana R (1980) J Coll Interf Sci 78:330
Benoit H, Doty P (1953) J Phys Chem 57:958
Geiduschek EP, Holtzer A (1958) Advan Biol Med Phys 6:431
Daoud M, Cotton JP, Farnoux B, Jannink G, Sarma G, Benoit H, Duplessix R, Picot C, de Gennes PG (1975) Macromolecules 8:804
des Cloiseaux J (1975) J Phys, Paris 36:281
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Imae, T., Ikeda, S. Characteristics of rodlike micelles of cetyltrimethylammonium chloride in aqueous NaCl solutions: Their flexibility and the scaling laws in dilute and semidilute regimes. Colloid & Polymer Sci 265, 1090–1098 (1987). https://doi.org/10.1007/BF01417467
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DOI: https://doi.org/10.1007/BF01417467