A Fast, Reversible, and Robust Gradient Nanocomposite Hydrogel Actuator with Water‐Promoted Thermal Response
- 28 February 2018
- journal article
- research article
- Published by Wiley in Macromolecular Rapid Communications
- Vol. 39 (8), e1700863
- https://doi.org/10.1002/marc.201700863
Abstract
Poly(N-isopropylacrylamide)/Laponite (PNIPAM/Laponite) gradient nanocomposite hydrogel actuators are developed as temperature-controlled actuators with excellent performance using a facile electrophoresis method. The actuators exhibit a rapid (20 s response time) and reversible response, as well as large deformation (bending angle of 231°), which is due to the graded forces generated by the thermo-induced anisotropic shrinkage and extension of the gradient hydrogels. A good linear relationship is observed between the maximum bending angles and the corresponding temperatures for the actuators with fixed sizes. Moreover, the gradient hydrogel with high water content achieved larger actuation angles and shorter response time than the one with low water content, showing an interesting water-promoted effect. Meanwhile, different types of actuators are designed to suit for more specific scenarios, and may be used for various applications, such as biosensing, artificial organization, and transportation of targeted objects.Keywords
Funding Information
- National Natural Science Foundation of China (U1403392)
- National Natural Science Foundation of China (51773132)
This publication has 26 references indexed in Scilit:
- Imidazolium-based ionic liquid type dependence of the bending response of polymer actuatorsEuropean Polymer Journal, 2016
- A chaotic self-oscillating sunlight-driven polymer actuatorNature Communications, 2016
- Tough and responsive oppositely charged nanocomposite hydrogels for use as bilayer actuators assembled through interfacial electrostatic attractionJournal of Materials Chemistry B, 2016
- A light responsive two-component supramolecular hydrogel: a sensitive platform for the fabrication of humidity sensorsSoft Matter, 2016
- Versatile Soft Grippers with Intrinsic Electroadhesion Based on Multifunctional Polymer ActuatorsAdvanced Materials, 2015
- Thermoresponsive actuation enabled by permittivity switching in an electrostatically anisotropic hydrogelNature Materials, 2015
- Poly(N‐isopropylacrylamide)‐Clay Nanocomposite Hydrogels with Responsive Bending Property as Temperature‐Controlled ManipulatorsAdvanced Functional Materials, 2015
- pH/temperature double responsive behaviors and mechanical strength of laponite-crosslinked poly(DEA-co -DMAEMA) nanocomposite hydrogelsJournal of Polymer Science Part B: Polymer Physics, 2015
- A Light‐Driven Pseudo[4]rotaxane Encoded by Induced Circular Dichroism in a HydrogelAdvanced Functional Materials, 2007
- Comb-type grafted hydrogels with rapid deswelling response to temperature changesNature, 1995