• 文献标题:   Bifunctional graphene oxide nanosheets for interfacially robust polymer actuators with instant solvent-induced self-folding
  • 文献类型:   Article
  • 作  者:   KOMEILYNIA Z, NASRINASRABADI B, CHEN JY, YUAN B, TANG B, ZHANG J, LI JL
  • 作者关键词:   graphene radical, polymerization, crosslinking
  • 出版物名称:   POLYMER
  • ISSN:   0032-3861 EI 1873-2291
  • 通讯作者地址:   Deakin Univ
  • 被引频次:   1
  • DOI:   10.1016/j.polymer.2019.122037
  • 出版年:   2020

▎ 摘  要

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 degrees 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.