Kai Yu

TL;DR: The polyimine is presented, which fundamentally behaves like a classic thermoset at ambient conditions yet can be reprocessed by application of either heat or water, and is thus the fi rst reported Covalent network polymers, which offer robust mechanical properties, generally lack the ability to be recycled.

TL;DR: In this paper, the authors demonstrate sequential self-folding structures realized by thermal activation of spatially-variable patterns that are 3D printed with digital shape memory polymers, which are digital materials with different shape memory behaviors.

TL;DR: Polyimine films made using >21% recycled content exhibit no loss of mechanical performance, therefore indicating all of the thermoset composite material can be recycled and reused for the same purpose.

TL;DR: In this article, the authors present a new paradigm to fully recycle epoxy-based carbon fiber reinforced polymer (CFRP) composites, where the epoxy matrix can be dissolved as the EG molecules participate in bond exchange reactions (BERs) within the covalent adaptable network (CAN), effectively breaking the long polymer chains into small segments.

TL;DR: In this article, a new thermosetting vitrimer epoxy ink and a 3D printing method that can 3D print epoxy into parts with complicated 3D geometries, which later can be recycled into a new ink for the next round of printing.