Delgado Sánchez, ClaraPartal López, PedroMartín Alfonso, María JoséNavarro Domínguez, Francisco Javier2023-12-152023-12-152021-11Delgado-Sánchez, C., Partal, P., Martín-Alfonso, M. J., & Navarro, F. J. (2021). Role of crystallinity on the thermal and viscous behaviour of polyethylene glycol-in-silicone oil (o/o) phase change emulsions. In Journal of Industrial and Engineering Chemistry (Vol. 103, pp. 348–357). Elsevier BV. https://doi.org/10.1016/j.jiec.2021.08.0031226-086Xhttps://hdl.handle.net/10272/22749Stable polyethylene glycol-in-silicone oil phase change emulsions were successfully prepared with a selected silicone surfactant. These oil-in-oil (o/o) emulsions have been scarcely examined up, despite the highly remarkable properties of both phases for energy recovery applications and cosmetic/pharmaceutical compositions. The objective of the present work was to study the effect of composition (surfactant and disperse phase concentrations) and the post-processing conditions (further agitation at the processing temperature for 24 h) on the final features of the emulsion. For this purpose, optical morphology, thermo-physical and the rheological behaviour of the emulsions and binary blends of their compounds were measured and analysed. Special attention has been paid to structural changes and crystallinity modifications of the emulsion disperse phase. The observed miscibility of the silicone surfactant and silicone chains with the disperse phase reduces its crystallinity degree and modifies in the crystallization mechanism of the polyethylene glycol, from heterogeneous to homogeneous nucleation. Interestingly, the change in the disperse phase crystallinity remarkably modifies final thermal and rheological properties of the emulsion.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Non-aqueous emulsionPhase change material (PCM)CrystallisationViscosityjournal article10.1016/j.jiec.2021.08.003open access3303 Ingeniería y Tecnología Químicas