Gelation and Yielding Behavior of Polymer-Nanoparticle Hydrogels
2021
Polymer-Nanoparticle hydrogels are a unique class of self-assembled, shear-thinning, yield-stress fluids which haved demonstrated potential utility in many impactful applications. Here we present a thorough analysis of the gelation and yielding behavior of these materials with respect to the polymer and nanoparticle component stoichiometry. Through comprehensive rheological and diffusion studies, we reveal insights into the structural dynamics of the polymer nanoparticle network which identify that stoichiometry plays a key role in gelation and yielding, ultimately enabling the development of hydrogel formulations with unique shear-thinning and yield-stress behaviors. Access to these materials opens new doors for interesting applications in a variety of fields including tissue engineering, drug delivery, and controlled solution viscosity.
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