Interparticle attraction controls flow heterogeneity in calcite gels. Issue 40 (14th September 2020)

• Record Type: Journal Article
• Authors: Liberto, Teresa; Le Merrer, Marie; Manneville, Sébastien; Barentin, Catherine
• Is Part Of: Soft matter. Volume 16:Issue 40(2020)
• Page Start: 9217
• Page End: 9229
• Publication Date: 2020-09-14
• Subjects: Soft condensed matter -- Periodicals; 530.413
• DOI: 10.1039/d0sm01079k
• Languages: English
• ISSNs: 1744-683X

Abstract

Abstract : Increasing interparticle attraction in calcite colloidal gels leads to flow heterogeneities including shear bands and temporal fluctuations. Abstract : We couple rheometry and ultrasonic velocimetry to study experimentally the flow behavior of gels of colloidal calcite particles dispersed in water, while tuning the strength of the interparticle attraction through physico-chemistry. We unveil, for the first time in a colloidal gel, a direct connection between attractive interactions and the occurrence of shear bands, as well as stress fluctuations.