Temperature and concentration dependence of SANS spectra of aqueous solutions of short-chain amphiphiles.
The small-angle neutron scattering (SANS) of some aqueous solutions of short-chain amphiphiles (glycols, diglycols, diols) has been measured as a function of concentration and temperature. The analysis of the spectra in terms of the Teubner-Strey phenomenological formula indicates that, on increasing the concentration of the amphiphile, the structure of all these systems evolves in a similar way, i.e. a transition from disordered structures toward correlated aggregates (microstructures). The transition is depressed by increasing the temperature.
INFM, Dipartimento di Energetica, dell'Università di Roma La Sapienza, Via Scarpa 16, 00161, Roma, Italy. giovanni.darrigo@uniroma1.it
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D'Arrigo
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Giordano
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Teixeira