Tuning the thermostability of GHG gels by salts at different positions on the Hofmeister scale.

ABSTRACT: The influence of Hofmeister cations (NH₄⁺, Na⁺, Mg²⁺) and anions (H₂PO₄^-, CH₃COO^-, Cl^-_, NO₃^-) on the thermostability of a GHG hydrogel was investigated. The combined results of UV circular dichroism (UVCD) and Small Amplitude Oscillatory Shear Rheology experiments reveal that the addition of salt reduces the stability of the gel phase and the underlying fibrils. In line with the cationic Hofmeister hierarchy, the chaotropic Mg²⁺ ions caused the greatest thermal destabilization of the gel phase with the gel → sol transition temperature T_gs value lowered by 10 °C. In the absence of salt, the gel → sol transition probed by the sto

SUBMITTER: O'Neill NS 

PROVIDER: S-EPMC11208536 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature