March 29, 2024
Shahriar Osfouri

Shahriar Osfouri

Academic Rank: Professor
Address:
Degree: Ph.D in Chemical Engineering
Phone: 88019360
Faculty: Faculty of Petroleum, Gas and Petrochemical Engineering

Research

Title Dynamics of Water State in Nano confined Environment
Type Article
Keywords
Journal Journal of the Taiwan Institute of Chemical Engineers
DOI
Researchers Shahriar Osfouri (First researcher) , Reza Azin (Second researcher) ,

Abstract

To investigate water state in vitro conditions, cetyltrimethylammonium bromide/isooctane 1-hexanol reverse micellar system was used as a model for nano scale medium. Using Fourier transform infrared spectroscopy and deconvolution technique, the water states in these systems were studied at several water/surfactant molar ratios, wo, with respect to time. The presence of four sub-peaks in deconvolution of FT-IR absorption spectra of OH stretching band certified four different states of water. The results showed time dependency of water state, especially in those systems having low wo, that are more dynamic. Also, exchange of water molecules between different states results in approaching each state to a final steady state value. Based on deconvolution results, it was found that mechanism of ionizing surfactant head group can control water bonded to the bromide counter ion. Moreover, more than 50% of water molecules are like frozen water in reverse micelles and they are not available for solubilization of hydrophilic compounds. Based on the results of this study, state and properties of water in nano scale medium are quite different from bulk scale.