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

Timo Karppinen; Heikki Pajari; Jonne Haapalainen; Ivan Kassamakov; Edward Hæggström

doi:10.1063/1.3387814

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

Timo Karppinen^*
, Heikki Pajari
, Jonne Haapalainen
, Ivan Kassamakov
, Edward Hæggström

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-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 language	English
Article number	174102
Journal	Applied Physics Letters
Volume	96
Issue number	17
DOIs	https://doi.org/10.1063/1.3387814
Publication status	Published - 2010
MoE publication type	A1 Journal article-refereed

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title = "Concurrent structural and mechanical characterization of forming colloidal film by ultrasound and light",

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.",

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AU - Karppinen, Timo

AU - Pajari, Heikki

AU - Haapalainen, Jonne

AU - Kassamakov, Ivan

AU - Hæggström, Edward

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

U2 - 10.1063/1.3387814

DO - 10.1063/1.3387814

M3 - Article

SN - 0003-6951

VL - 96

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 17

M1 - 174102

ER -

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

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