Particle laden fluid interfaces: dynamics and interfacial rheology

Alma J Mendoza; Eduardo Guzmán; Fernando Martínez-Pedrero; Hernán Ritacco; Ramón G Rubio; Francisco Ortega; Victor M Starov; Reinhard Miller

doi:10.1016/j.cis.2013.10.010

Particle laden fluid interfaces: dynamics and interfacial rheology

Adv Colloid Interface Sci. 2014 Apr:206:303-19. doi: 10.1016/j.cis.2013.10.010. Epub 2013 Oct 19.

Authors

Alma J Mendoza¹, Eduardo Guzmán², Fernando Martínez-Pedrero³, Hernán Ritacco⁴, Ramón G Rubio⁵, Francisco Ortega⁶, Victor M Starov⁷, Reinhard Miller⁸

Affiliations

¹ Departamento de Química Física I, Facultad de Química, Universidad Complutense, 28040 Madrid, Spain.
² CNR-Istituto per L'Energetica e l'Interfase, Via De Marini 6, Genova, Italy. Electronic address: e.guzman@ge.ieni.cnr.it.
³ Campus Internacional de Excelencia, Universidad Complutense, 28040 Madrid, Spain.
⁴ Departamento de Física, Universidad Nacional del Sur, Alem 1253, CP 8000 Bahía Blanca, Buenos Aires, Argentina.
⁵ Departamento de Química Física I, Facultad de Química, Universidad Complutense, 28040 Madrid, Spain. Electronic address: rgrubio@quim.ucm.es.
⁶ Departamento de Química Física I, Facultad de Química, Universidad Complutense, 28040 Madrid, Spain. Electronic address: fortega@quim.ucm.es.
⁷ Department of Chemical Engineering, Loughborough University, LE11 3TU Loughborough, UK.
⁸ Max Planck Institute for Colloids and Interfaces, Potsdam-Golm, Germany.

PMID: 24200090
DOI: 10.1016/j.cis.2013.10.010

Abstract

We review the dynamics of particle laden interfaces, both particle monolayers and particle+surfactant monolayers. We also discuss the use of the Brownian motion of microparticles trapped at fluid interfaces for measuring the shear rheology of surfactant and polymer monolayers. We describe the basic concepts of interfacial rheology and the different experimental methods for measuring both dilational and shear surface complex moduli over a broad range of frequencies, with emphasis in the micro-rheology methods. In the case of particles trapped at interfaces the calculation of the diffusion coefficient from the Brownian trajectories of the particles is calculated as a function of particle surface concentration. We describe in detail the calculation in the case of subdiffusive particle dynamics. A comprehensive review of dilational and shear rheology of particle monolayers and particle+surfactant monolayers is presented. Finally the advantages and current open problems of the use of the Brownian motion of microparticles for calculating the shear complex modulus of monolayers are described in detail.

Keywords: Diffusion coefficient of trapped particles; Interfacial dilational and shear rheology; Interfacial microrheology; Particle laden interfaces; Rheology of particle–surfactant monolayers.