Engineering crack tortuosity in polymer-polymer composites through ordered pores

Megan Valentine, Craig Hawker, Luke Gockowski, Neil Dolinski, Roberto Chavez, Noy Cohen, Fabian Eisenreich, Stefan Hecht & Robert McMeeking
Multimaterial additive manufacturing (or 3D printing) is an enabling tool for exploring structure-property relationships. In this work, a recently developed multimaterial printing approach, solution mask liquid lithography (SMaLL), is used to produce polymer-polymer composites inspired by tough, hierarchical structures found in nature. Triphasic composites comprised of a hard exterior “cuticle”, a soft interior “core,” and controlled pore size/structure are printed in a single step and their mechanical properties evaluated. The results of these tests demonstrate...
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