Hemorheology; Hemostasis; Materials Testing; Rheology
We learn from biological systems and apply the gained results to technical systems and vice versa. See here the curves gained from blood compared to nanofiller reinforced resins. 1. Biological materials: we gathered several comparative blood rheology data, both, from husbandry, and from exotic animals. Due to its fluidity, blood is tested in double gap cylinders or large cone-plate symmetries. We analyse blood and its components in rotation and oscillation. Indeed, we are still searching for the zeroviscosity of blood… Being your cooperation partner, we test each viscoelastic biological material of your choice that fits into our measuring systems and that is able to stay in close contact to the rotating or oscillating surface. Specific tissue architecture or the material´s change during shear, however, can result in inhomogeneity of the applied shear field throughout the test material. If you want to collaborate, please contact us and discuss with us. 2. Technical materials: we characterize polymer resins containing different kind of fillers.
Techniques, methods & infrastructure
Rheometers (Physica MCR series, Anton Paar, Graz, Austria) for the characterisation of viscoelastic materials. Different shear geometries for gels and liquids, Rheo-Optik. Viscosity, thixotropy by 3-ITT, storage (G´) and loss modulus (G´´), flow point, yield point, time- and stress-dependent stabilisation of materials. Kinetic tests (f.i. gelation, glass transition). Ectacytometer (Lorrca, Mechatronics, Netherland) for the measurement of RBC elongation with shear stress, Myrenne aggregometer (Roetgen, Germany) for RBC aggregation, rolling ball viscometer (AMVn, Anton Paar, Graz) for Newtonian liquids, LS30 viscometer (Contraves, Zurich, Switzerland).