Monitoring of the dynamics of structural transitions of the water-ethanol silicate solution mesophase in the presence of a surfactant by the method of acoustic emission

摘要

The method of continuous monitoring of acoustic emission (AE) descriptors was applied to minitor structural changes of the mesophase in the surfactant (CTAB) - silicate (TEOS) system is the water-alcohol solution. The AE signals that appeared due to structural changes about one hour after the solutions were mixed, differed both as concerned the times of duration and the maximum frequencies in comparison with the signals emitted during the second transforamtion in which the solid phase (gel) was formed. The first change was ascribed to the transformations of micelles of the cationic surfactant (CTAB) in the presence of silicate.