Hydrogels are used in many industrial applications including drug delivery, tissue scaffolds, microfluidics, and fuel cell membranes, where controlling transport of a particular permeate is critical to performance. In general, the structure of the hydrogel determines its transport properties but developing the necessary structure-transport property relationships often requires multiple measurement techniques. In this work, we present poroelastic relaxation indentation (PRI) as a single measurement tool to establish the relationships between the network structure and the transport properties of well-defined hydrogels.
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