@article{10272/19720,
year = {2021},
month = {3},
url = {http://hdl.handle.net/10272/19720},
abstract = {Oil-in-oil phase change emulsions, composed of phase change materials (PCMs) dispersed in a
continuous oily medium, have never been reported in the literature. The current study involves the
formulation, stabilisation and characterisation of novel anhydrous emulsions of polyethylene
glycol (PEG4000) as PCM in silicone oil. Emulsions with different dispersed phase concentrations
were evaluated by analysing the viscous flow properties, optical microscopy and modulated
differential scanning calorimetry. The results evidence that the emulsions can be pre-stabilised at
80 °C, under high shear conditions, by selecting an adequate silicone surfactant but undergo a
severe 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 nonaqueous
dispersions. This process gives rise to a reduction of the shear-thinning character of the
emulsion, shifts the melting and crystallization temperature of the PEG4000 to lower values and
reduce its crystallinity. This is attributed to partial compatibility of the crystalline fraction of
PEG4000 with other compounds of the emulsion.},
organization = {This work has received funding from MINECO (Economy and compe
titiveness Ministry of Spain) 
and from Junta de Andalucía (Spain) through the projects CTQ2017-89792-R
 (AEI/FEDER, UE) 
and P18-RT-4684.},
organization = {This work has received funding from MINECO (Economy and compe
titiveness Ministry of Spain) and from Junta de Andalucía (Spain) through the projects TQ2017-89792-R (AEI/FEDER, UE) 
and P18-RT-4684.},
publisher = {Elsevier},
title = {Formulation and processing of novel non-aqueous polyethylene glycol-in-silicone oil (o/o) phase change emulsions},
doi = {10.1016/j.solmat.2020.110898},
author = {Delgado Sánchez, Clara and Cuadri Vega, Antonio Abad and Navarro Domínguez, Francisco Javier and Partal López, Pedro},
}