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26 April 2018 Structure changes in metastable and unstable foams probed by multispeckle diffusing light spectroscopy
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Abstract
The temporal evolution of the metastable and unstable foams had been studied. Diffusion wave spectroscopy was chosen as the diagnostic method, with calculation of the correlation time of the fluctuations in the intensity of the probing radiation. It was established that the correlation time increases with the time according to the power law with different parameters, depending on the type of the evolution and was found to be equal to 0.5 for the case of the metastable and to 2,52 for the unstable foam. It was also determined that the behaviour of the correlation time agrees well with the evolution of the characteristic dimensions of the scatterers in the form of bubbles in the medium, which can be used for contactless monitoring of the foaming processes in the production of the foam-like materials for various applications, for example, in the synthesis of the biocompatible polymer matrices - scaffolds.
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S. A. Yuvchenko, D. V. Tzyipin, A. A. Isaeva, E. A. Isaeva, O. V. Ushakova, M. S. Macheev, and D. A. Zimnyakov "Structure changes in metastable and unstable foams probed by multispeckle diffusing light spectroscopy", Proc. SPIE 10717, Saratov Fall Meeting 2017: Laser Physics and Photonics XVIII; and Computational Biophysics and Analysis of Biomedical Data IV, 107171I (26 April 2018); https://doi.org/10.1117/12.2315909
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