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Bossler, Frank

Dipl.-Ing. Frank Bossler

Group: 

Capillary Suspensions (CapS)

Applied Mechanics (AME)


Room: 206
Phone: +49 721 608 -48824
Fax: +49 721 608 -43758
frank bosslerWvc2∂kit edu

KIT - Campus Süd
Institut für Mechanische Verfahrenstechnik und Mechanik
Arbeitsgruppe Angewandte Mechanik

Gotthard-Franz-Str. 3, Bldg. 50.31
76131 Karlsruhe



Publications Frank Bossler
Titel Autor Quelle

F. Bossler, J. Maurath, K. Dyhr, N. Willenbacher, E. Koos

Journal of Rheology, 62 (1), 183–196 (2018) 

F. Bossler, L. Weyrauch, R. Schmidt, E. Koos

Colloids and Surfaces A: Physicochemical and Engineering Aspects 518, 85-97 (2017)

F. Bossler, E. Koos

Langmuir, 32 (6), 1489–1501 (2016)

C. Oelschlaeger, F. Bossler, N. Willenbacher

Biomacromolecules, 17 (2), pp 580–589 (2016)



My research topic

Microstructure of capillary suspensions

For the directed development of new products that are based on capillary suspensions, it is not only necessary to know the macrostructure, but also the microstructure of such suspensions. In particular, the influence of different system parameters (e.g. contact angle and amount of added secondary fluid) on the developing sample structure is of great interest.

To elucidate the microstructure, we utilise different imaging techniques. Capillary suspensions can be displayed with very high resolution in all three spatial dimensions by using confocal microscopy. From advanced analysis of the recorded image data, it is possible to get structure parameters such as the number of capillary bridges per particle or size and composition of the hypothesised particle clusters.

The sample macrostructure also can be inferred from measured rheological parameters, like viscosity, complex shear modulus or yield stress. Finally, the determined microstructure parameters may be coupled with the macrostructure results of the rheological measurements. This allows to investigate some more demanding tasks like the connection between yield stress and the capillary force which strongly depends on the microstructure.

A basic requirement for all of these studies is the buildup of a sample spanning network structure. For this, appropriate mixing conditions during sample preparation and suitable combinations of fluids and particles have to be chosen. Otherwise spherical agglomeration and insufficient droplet breakup during sample preparation can heavily complicate the formation of capillary suspensions.

Conference contributions

F. Bossler, I. Natalia, M. Weiß, S. Fischer and E. Koos:
Structure of capillary suspensions and their applications (talk).
2017 MRS Fall Meeting & Exhibition, Boston (USA), November 26 - Dezember 01 2017. 

 

F. Bossler, S. Bindgen and E. Koos:
Structural transitions with variation of the secondary fluid volume fraction in liquid-liquid-solid systems (talk).
31st Conference of The European Colloid and Interface Society, Madrid (Spain), September 03-08 2017. 

 

F. Bossler, J. Maurath, N. Willenbacher and E. Koos:
Untersuchung der Mikrostruktur von Kapillarsuspensionen zur Entwicklung innovativer Pasten (talk).
Gemeinsame Diskussionstagung der Deutschen Rheologischen Gesellschaft und der ProcessNet-Fachgruppe "Rheologie", Berlin (Germany), March 13-14 2017. 

 

F. Bossler, J. Maurath, K. Dyhr, N. Willenbacher and E. Koos:
Fractal Dimensions of Capillary Force Induced Particle Networks Determined from Rheology and Confocal Microscopy (poster).
30th Conference of The European Colloid and Interface Society, Rome (Italy), September 04-09 2016.
 

 

F. Bossler, J. Maurath, K. Dyhr, N. Willenbacher and E. Koos:
Fractal Dimensions of Capillary Force Induced Particle Networks Determined from Rheology and Confocal Microscopy (talk).
17th International Congress on Rheology, Kyoto (Japan), August 08-13 2016.
 

 

I. Natalia, F. Bossler and E. Koos:
Strength and Deformation of Capillary Suspension Networks (poster).
17th International Congress on Rheology, Kyoto (Japan),
August 08-13 2016. 

 

F. Bossler, J. Maurath, K. Dyhr, N. Willenbacher and E. Koos:
Scaling Behavior of the Yield Stress in Capillary Suspensions (poster).
89th ACS Colloid & Surface Science Symposium, Pittsburgh (USA), June 15-17 2015.
 

 

C. Oelschlaeger, L. Lintis, E. Hnátková, F. Bossler and N. Willenbacher:
Structural, macro- and microrheological properties of Hyaluronic Acid (HA) cryogels (poster).
10th Annual Hyaluronan Conference, Florence (Italy), June 07-11 2015.
 

 

F. Bossler, I. Natalia and E. Koos:
Networks induced by the capillary force (talk).
15th Conference of the International Association of Colloid and Interface Scientists, Mainz (Germany), May 24-29 2015.
 

 

F. Bossler, J. Maurath, K. Dyhr, N. Willenbacher and E. Koos:
Scaling Behavior of the Yield Stress in Capillary Suspensions (poster).
15th Conference of the International Association of Colloid and Interface Scientists, Mainz (Germany), May 24-29 2015.
 

 

F. Bossler, L. Weyrauch, R. Schmidt and E. Koos:
Influence of droplet breakup and particle agglomeration on the rheology of capillary suspensions (talk).
10th Annual European Rheology Conference, Nantes (France), April 14-17 2015.
 

 

C. Oelschlaeger, L. Lintis, E. Hnátková, F. Bossler and N. Willenbacher:
Structural, mechanical and microrheological properties of hyaluronic acid cryogels (talk).
10th Annual European Rheology Conference, Nantes (France), April 14-17 2015.
 

 

F. Bossler and E. Koos:
Structure of networks induced by the capillary force (talk).
28th Conference of The European Colloid and Interface Society, Limassol (Cyprus), September 07-12 2014.

Teaching

Winter semester 2014/15: 

   Exercises to "Technical Mechanics I (Statics)"

   Organisation of exercises in small groups in "Technical Mechanics I (Statics)"

 

Summer semester 2015:

   Exercises to "Technical Mechanics II (Elastostatics)"

   Organisation of exercises in small groups in "Technical Mechanics II (Elastostatics)"

Supervised Bachelor/Master/Student/Diploma Theses Frank Bossler
Titel Typ Datum
Bachelorarbeit finished 03/2015
Bachelorarbeit finished 03/2015
Bachelor-, Studien-, Diplom- oder Masterarbeit finished 10/2014