Open AccessComplex solutions under shear and pressure: a rheometer setup for X‐ray scattering experiments
Author(s) -
Wieland D. C. F.,
Zander T.,
Garamus V. M.,
Krywka C.,
Dedinaite A.,
Claesson P.,
Willumeit-Römer R.
Publication year - 2017
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577517002648
Subject(s) - rheometer , scattering , materials science , lubrication , shear (geology) , composite material , mechanics , optics , rheology , physics
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.