Characterization of dispersions by ultrasound spectroscopy

In this work, a review of our main theoretical and experimental results in particle sizing of colloidal dispersions using ultrasound spectroscopy is given, with special emphasis on polymeric materials. Both low and high-concentration systems are analyzed. In the first case, a single particle literature model is shortly presented and the key problem of model parameter evaluation is addressed. With this respect, a specific approach to the direct evaluation of the intrinsic attenuation of bulk, solid materials is also mentioned. For high concentration systems, a semi-empirical modeling approach is described and validated by comparison with experimental data. A few conclusive remarks and perspectives are finally given.