Relaxation models for analyzing NMR T2 spectra of O/W and W/O/W emulsions

Abstract

This study aimed at comprehending the transversal relaxation time(T₂) spectra and relaxation mechanism for O/W and W/O/W emulsions in NMR CPMG experiment. The T₂ relaxation model for O/W and W/O/W emulsions was established respectively. T₂ spectra of O/W emulsions with different water content and W/O/W emulsions with settling time in demulsification were analyzed based the relaxation models. The results show that the T₂ spectra characteristics of emulsions in NMR CPMG experiment are consistent with the prediction of relaxation models, which indicated that relaxation models were practical and contribute to the analysis of T₂ spectra for emulsions. Those study laid a foundation for analyzing the characters of single or double emulsions basing T₂ spectra.