Concurrent structural and mechanical characterization of forming colloidal film by ultrasound and light

T. Karppinen (Corresponding Author), Heikki Pajari, J. Haapalainen, I. Kassamakov, E. Haggström

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

We combined noninvasive ultrasonic and optical measurements to estimate the mechanical properties of forming colloidal films. Light reflection measurements determined the stage of drying and film structure. A concurrent ultrasound measurement quantified the film stiffness. The main finding was that compressing capillary forces induced a temporal peak in film stiffness when air began to enter the pores in the film. We believe that empirically observing such a stiffening event has not been reported before. This finding advances the understanding of the physics of consolidating suspensions.
Original languageEnglish
Article number174102
JournalApplied Physics Letters
Volume96
Issue number17
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

Fingerprint Dive into the research topics of 'Concurrent structural and mechanical characterization of forming colloidal film by ultrasound and light'. Together they form a unique fingerprint.

  • Cite this