New methods to analyse fragmentation mechanisms of precipitated silicas

Timothée Dumas (1, 2, 3) , Olivier Bonnefoy (1, 2, 3) , Gérard Thomas (1, 2, 3) , Sébastien Nebut (4) , Laurent Guy (4)

1 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
2 P2MC-ENSMSE - Département Poudres et Matériaux Multi-Composants
3 LPMG-EMSE - Laboratoire des Procédés en Milieux Granulaires
4 Rhodia Opérations

Precipitated silica is traditionally used as reinforcing filler in rubber applications. In pneumatic manufacture, it offers several advantages compared to carbon black. Indeed, in tyres treads, precipitated silica can yield a lower rolling resistance and better wet grip at equal wear resistance than carbon black. The development of a new method to study the fragmentation mechanism of precipitated silica is investigated. Usually, the dispersion of granules is done in high viscous media (elastomer or oils). In this paper, the study is carried out in a friendlier medium (air or water).

Mots clés: Structure-property; Fluidized bed; Ultrasounds; Breakage; Attrition; Silica

Domaines: Génie des procédés

Timothée Dumas, Olivier Bonnefoy, Gérard Thomas, Sébastien Nebut, Laurent Guy. New methods to analyse fragmentation mechanisms of precipitated silicas. 5th International Workshop on Granulation. Granulation Conference Lausanne, Zwitzerland,, Jun 2011, Lausanne, Switzerland. pp.10. ⟨hal-00616514⟩