semifluids
Semifluids are materials that exhibit both fluid-like flow and solid-like structure. They behave as liquids under some conditions but can retain shape or form when at rest due to a network of interactions that provides yield stress or elastic storage. In rheology, semifluids are typically non-Newtonian and viscoelastic, often possessing a yield stress that must be exceeded to initiate flow. Many semifluids show time-dependent behavior, being thixotropic or rheopectic, meaning their viscosity changes with the history of shear.
Classification and examples vary by discipline, but common members include pastes, gels, emulsions, foams, and suspensions
Characterization typically relies on rheological measurements. Shear stress versus shear rate tests quantify flow behavior, while
Applications and relevance span manufacturing and consumer products. Semifluid materials are used in 3D printing (bioinks