Towards Sustainable Energy Storage: The Potential of anhydrous Pickering Emulsions
S, Sanabria, C. Delgado-Sánchez, F.J. Navarro Pro2TecS-Chemical Process and Product Technology Research Center, Dept. Chemical Engineering, ETSI, Universidad de Huelva, Campus El Carmen, Huelva (Spain) 2026-02-15

Abstract

As the global demand for renewable energyaccelerates, finding reliable and efficient energy storage solutions becomes increasingly essential to address the challenge of intermittency on energy generation, as in the case of solar and wind energy (1). One promising approach involves the use of emulsions containing phase change materials (PCMs), systems that can effectively store and release thermal energy during phase transitions (2). Despite their potential, PCM-based emulsions face key challenges, such as long-term stability and ensuring processability in practical applications. Our study introduces an innovative approach by developing and characterizing water-free Pickering emulsions, in which paraffin (with a melting point of 58-60°C) acts as the PCM dispersed as droplets, while PEG serves as the continuous phase, and are stabilized using solid silica nanoparticles.

Key words: Thermal energy storing, Phase change materials, Pickering emulsions.

References

[1] A. Shukla, D. Buddhi, y R. L. Sawhney, «Solar water heaters with phase change material thermal energy storage medium: A review», Renewable and Sustainable Energy Reviews, vol. 13, n.o 8, Art. n.o 8, oct. 2009, doi: 10.1016/j.rser.2009.01.024.

[2] G. Zhang, Z. Yu, G. Cui, B. Dou, W. Lu, y X. Yan, «Fabrication of a novel nano phase change material emulsion with low supercooling and enhanced thermal conductivity», Renewable Energy, vol. 151, pp. 542-550, may 2020, doi: 10.1016/j.renene.2019.11.044.

[3] C. Albert, M. Beladjine, N. Tsapis, E. Fattal, F. Agnely, y N. Huang, «Pickering emulsions: Preparation processes, key parameters governing their properties and potential for pharmaceutical applications», Journal of Controlled Release, vol. 309, pp. 302-332, sep. 2019, doi: 10.1016/j.jconrel.2019.07.003.

[4] L. Liu, J. Niu, y J.-Y. Wu, «Formulation of highly stable PCM nano-emulsions with reduced supercooling for thermal energy storage using surfactant mixtures», Solar Energy Materials and Solar Cells, vol. 223, p. 110983, may 2021, doi: 10.1016/j.solmat.2021.110983.

[5] X. Zhang, J. Wu, y J. Niu, «PCM-in-water emulsion for solar thermal applications: The effects of emulsifiers and emulsification conditions on thermal performance, stability and rheology characteristics», Solar Energy Materials and Solar Cells, vol. 147, pp. 211-224, abr. 2016, doi: 10.1016/j.solmat.2015.12.022.

[6] L. L. Schramm, Emulsions, Foams, and Suspensions: Fundamentals and Applications. John Wiley & Sons, 2006.

[7] S. R. Derkach, «Rheology of emulsions», Advances in Colloid and Interface Science, vol. 151, n.o 1, Art. n.o 1, oct. 2009, doi: 10.1016/j.cis.2009.07.001.