RT Journal Article
T1 Formulation and processing of novel non-aqueous polyethylene glycol-in-silicone oil (o/o) phase change emulsions
A1 Delgado Sánchez, Clara
A1 Cuadri Vega, Antonio Abad
A1 Navarro Domínguez, Francisco Javier
A1 Partal López, Pedro
AB Oil-in-oil phase change emulsions, composed of phase change materials (PCMs) dispersed in acontinuous oily medium, have never been reported in the literature. The current study involves theformulation, stabilisation and characterisation of novel anhydrous emulsions of polyethyleneglycol (PEG4000) as PCM in silicone oil. Emulsions with different dispersed phase concentrationswere evaluated by analysing the viscous flow properties, optical microscopy and modulateddifferential scanning calorimetry. The results evidence that the emulsions can be pre-stabilised at80 °C, under high shear conditions, by selecting an adequate silicone surfactant but undergo asevere destabilisation after a cooling and heating cycle. Nevertheless, a post-processing protocol(low shear agitation at 80 °C for 24 h) leads to thermal cycle resistant and storage stable nonaqueousdispersions. This process gives rise to a reduction of the shear-thinning character of theemulsion, shifts the melting and crystallization temperature of the PEG4000 to lower values andreduce its crystallinity. This is attributed to partial compatibility of the crystalline fraction ofPEG4000 with other compounds of the emulsion.
PB Elsevier
SN 0927-0248
YR 2021
FD 2021-03
LK http://hdl.handle.net/10272/19720
UL http://hdl.handle.net/10272/19720
LA eng
NO Delgado Sánchez, C., Cuadri Vega, A. A., Navarro  Domínguez, F. J. & Partal López, P. (2021). Formulation and processing of novel non-aqueous polyethylene glycol-in-silicone oil (o/o) phase change emulsions. Solar Energy Materials and Solar Cells, 221, 110898. DOI: https://doi.org/10.1016/j.solmat.2020.110898
NO This work has received funding from MINECO (Economy and competitiveness Ministry of Spain) and from Junta de Andalucía (Spain) through the projects CTQ2017-89792-R (AEI/FEDER, UE) and P18-RT-4684.
NO This work has received funding from MINECO (Economy and competitiveness Ministry of Spain) and from Junta de Andalucía (Spain) through the projects TQ2017-89792-R (AEI/FEDER, UE) and P18-RT-4684.
DS Repositorio Institucional de la Universidad de Huelva
RD 13 jun 2026