A hybrid double-network poly(N-isopropylacrylamide) (PNIPAm-co-PAA)/nanocellulose hydrogel was fabricated by inverted stereolithography (inverted-SLA) 3D printing to establish a new materials platform that exhibits attractive tunable properties including  stretchability, thermo-responsivity, optical switching, and bio-adhesivity.  It was found that PNIPAm-co-PAA/CNF hydrogels are stretchable and exhibit switchable bio-adhesivity in response to external modulation of the lower critical solution temperature (LCST).  Further, changes in the transparency of the PNIPAm-co-PAA/nanocellulose as a function of elongation and LCST modulation were observed. These latter exciting phenomena in the as-printed PNIPAm-co-PAA/nanocellulose hydrogels can be attributed to an interpenetrating polymer network (IPN) of crosslinked PNIPAm and nanocellulose. The prepared PNIPAm-co-PAA/nanocellulose hydrogels can be used as durable temperature-sensitive sensors and functional biomedical devices.<br/>

Stimuli-responsive PNIPAm-co-PAA/nanocellulose hydrogels as a flexible and 3D printable biomaterials platform

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.