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

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.