Rheological and flow birefringence studies of rod-shaped pigment nanoparticle dispersions

Salamon, Péter; Geng, Yong; Eremin, Alexey; Stannarius, Ralf; Klein, Susanne; Börzsönyi, Tamás

Abstract

We study rheological and rheo-optical properties of suspensions of anisometric pigment particles in a non-polar fluid. Different rheological regimes from the dilute regime to an orientationally arrested gel state were characterized and compared with existing theoretical models. We demonstrate the intricate flow behaviour in a wide range of volume fractions. A unique combination of the optical properties of the particles results in a giant rheo-optical effect: an unprecedentedly large shear stress-induced birefringence was found in the isotropic range, exhibiting a sharp pre-transitional behaviour.

Citation

Salamon, P., Geng, Y., Eremin, A., Stannarius, R., Klein, S., & Börzsönyi, T. (2020). Rheological and flow birefringence studies of rod-shaped pigment nanoparticle dispersions. Journal of Molecular Liquids, 313, Article 113401. https://doi.org/10.1016/j.molliq.2020.113401

• Journal Article Type: Article
• Acceptance Date: May 19, 2020
• Online Publication Date: Jun 1, 2020
• Publication Date: Sep 1, 2020
• Deposit Date: Jun 15, 2020
• Publicly Available Date: Jun 16, 2020
• Journal: Journal of Molecular Liquids
• Print ISSN: 0167-7322
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 313
• Article Number: 113401
• DOI: https://doi.org/10.1016/j.molliq.2020.113401
• Keywords: Physical and Theoretical Chemistry; Spectroscopy; Materials Chemistry; Atomic and Molecular Physics, and Optics; Electronic, Optical and Magnetic Materials; Condensed Matter Physics
• Public URL: https://uwe-repository.worktribe.com/output/6025026
• Additional Information: This article is maintained by: Elsevier; Article Title: Rheological and flow birefringence studies of rod-shaped pigment nanoparticle dispersions; Journal Title: Journal of Molecular Liquids; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.molliq.2020.113401; Content Type: article; Copyright: © 2020 The Authors. Published by Elsevier B.V.