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.
D'Arrigo
G
G
INFM, Dipartimento di Energetica, dell'Università di Roma La Sapienza, Via Scarpa 16, 00161, Roma, Italy. giovanni.darrigo@uniroma1.it
Giordano
R
R
Teixeira
J
J