Polymer nanoparticles to decrease thermal conductivity of phase change materials

Fabien Salaün (1) , Devaux Eric , Serge Bourbigot (2) , Pascal Rumeau (3) , Pierre-Olivier Chapuis (4) , Sourabh Kumar Saha (4) , Sebastian Volz (4)

1 GEMTEX - Génie et Matériaux Textiles
2 UMET - Unité Matériaux et Transformations - UMR 8207
3 Institut Français Textile-Habillement
4 EM2C - Laboratoire d'Énergétique Moléculaire et Macroscopique, Combustion

Microparticles including paraffin are currently used for textiles coating in order to deaden thermal shocks. We will show that polymer nanoparticles embedded in those microsized capsules allow for decreasing the thermal conductivity of the coating and enhance the protection in the stationary regime. A reasonable volume fraction of polymer nanoparticles reduces the conductivity more than predicted by Maxwell mixing rules. Besides, measurements prove that the polymer nanoparticles do not affect the latent heat and even improve the phase change behaviour as well as the mechanical properties.

Mots clés: polymer nanoparticles; phase change microparticles; microencapsulation

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Thermique [physics.class-ph]; Thermique [physics.class-ph]; Polymères

Fabien Salaün, Devaux Eric, Serge Bourbigot, Pascal Rumeau, Pierre-Olivier Chapuis, et al.. Polymer nanoparticles to decrease thermal conductivity of phase change materials. Thermochimica Acta, 2008, 477, pp.25-31. ⟨hal-00192605⟩