Title :
Ultrasonic and optical characterization of forming colloidal films
Author :
Karppinen, Timo ; Haapalainen, Jonne ; Kassamakov, Ivan ; Hæggström, Edward ; Pajari, Heikki
Author_Institution :
Dept. of Phys., Univ. of Helsinki, Helsinki
Abstract :
Consolidation mechanisms for colloidal suspensions are currently inadequately characterized due to lack of suitable experimental techniques. We contributed to this question by combining ultrasonic and optical measurements. White light specular and diffuse reflection measurements provided information about colloidal film formation, i.e. the stage of drying and its structure while a concurrent ultrasound reflection measurement non-destructively provided a quantitative film stiffness estimate during the film formation. The sample was typical coating color used in the paper industry.
Keywords :
colloids; elasticity; light reflection; light scattering; shear modulus; suspensions; ultrasonic materials testing; ultrasonic reflection; colloidal film formation; colloidal suspensions; concurrent ultrasound reflection measurement; consolidation mechanisms; diffuse reflection measurement; drying; optical characterization; quantitative film stiffness estimation; ultrasonic characterization; white light specular measurement; Coatings; FCC; Optical films; Optical reflection; Pigments; Pulp and paper industry; Pulse measurements; Suspensions; Ultrasonic imaging; Ultrasonic variables measurement; component; diffuse reflection; film formation; light; longitudinal modulus; non-destructive; optical; paper coating; quantitative; shear modulus; specular reflection; ultrasound;
Conference_Titel :
Ultrasonics Symposium, 2008. IUS 2008. IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2428-3
Electronic_ISBN :
978-1-4244-2480-1
DOI :
10.1109/ULTSYM.2008.0468
