Complex solutions under shear and pressure: a rheometer setup for X-ray scattering experiments

A newly developed high-pressure rheometer for in situ X-ray scattering experiments is described. A commercial rheometer was modified in such a way that X-ray scattering experiments can be performed under different pressures and shear. First experiments were carried out on hyaluronan, a ubiquitous biopolymer that is important for different functions in the body such as articular joint lubrication. The data hint at a decreased electrostatic interaction at higher pressure, presumably due to the increase of the dielectric constant of water by 3% and the decrease of the free volume at 300   bar.

Source: Journal of Synchrotron Radiation - March 22, 2017 Category: Physics Authors: Wieland, D.C.F. Zander, T. Garamus, V.M. Krywka, C. Dedinaite, A. Claesson, P. Willumeit-R ö mer, R. Tags: rheology pressure small-angle X-ray scattering complex solutions hyaluronan research papers Source Type: research