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Bifunctional graphene oxide nanosheets for interfacially robust polymer actuators with instant solvent-induced self-folding
journal contribution
posted on 2020-01-09, 00:00 authored by Z Komeily-Nia, Bijan Nasri-Nasrabadi, Jingyu Chen, B Yuan, Bin TangBin Tang, Jin Zhang, Jingliang LiJingliang Li© 2019 Elsevier Ltd Polymers are ideal for deformation-induced actuating in soft robotics due to their great physical flexibility. However, creating polymer films with tunable deformation and a sufficient binding strength between layers is a big challenge. In this work, graphene oxide nanosheets with tunable radical contents are prepared for in-situ polymerization and grafting of polymers to achieve chemically crosslinked composites. The radical density and loading of nanosheets control the crosslinking density of a polymer film, which tunes its solvent-absorbing (swelling) capacity. A solvent-responsive polymer actuator that folds and grips an object can be fabricated by assembling two films with different degrees of swelling. Thermal annealing of two polymer strips at 100 °C significantly improves the fracture strength from 60 KPa to 380 KPa and the fracture strain from 70% to 170%. The results of this work demonstrate that radical-engineered graphene oxide nanosheets can be used to fabricate smart polymers with tunable bending performance and super interfacial binding strength for applications such as soft robotics.
History
Journal
PolymerVolume
186Article number
122037Pagination
1 - 8Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0032-3861Language
engPublication classification
C1 Refereed article in a scholarly journalUsage metrics
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