Designing Stress-Adaptive Dense Suspensions Using Dynamic Covalent Chemistry.

ABSTRACT: The non-Newtonian behaviors of dense suspensions are central to their use in technological and industrial applications and arise from a network of particle-particle contacts that dynamically adapt to imposed shear. Reported herein are studies aimed at exploring how dynamic covalent chemistry between particles and the polymeric solvent can be used to tailor such stress-adaptive contact networks, leading to their unusual rheological behaviors. Specifically, a room temperature dynamic thia-Michael bond is employed to rationally tune the equilibrium constant (K _eq) of the polymeric solvent to the particle interface. It is demonstrated that low K _eq leads to shear thinning, while high K _eq produces antithixotropy, a rare phenomenon where the

SUBMITTER: Jackson GL 

PROVIDER: S-EPMC9367004 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature