Electromechanical actuation with controllable motion based on a single-walled carbon nanotube and natural biopolymer composite
| Autor: | Jinghai Liu, Chunrui Chang, Wei Chen, Ying Hu, Luhua Lu |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Fabrication Composite number Transducers General Physics and Astronomy Carbon nanotube law.invention Condensed Matter::Materials Science Motion Biopolymers law Waveform Nanotechnology General Materials Science Composite material Particle Size Electrical conductor General Engineering Equipment Design Micro-Electrical-Mechanical Systems Computer Science::Other Nanostructures Vibration Equipment Failure Analysis Transducer Voltage |
| Zdroj: | ACS nano. 4(6) |
| ISSN: | 1936-086X |
| Popis: | This paper reports novel electromechanical behavior for a natural biopolymer film due to the incorporation of a conductive carbon nanotube network. Through simple solution blending and casting, high weight fraction single-walled carbon nanotube-chitosan composite films were fabricated and exhibited electromechanical actuation properties with motion controlled by low alternating voltage stimuli in atmospheric conditions. Of particular interest and importance is that the displacement output imitated perfectly the electrical input signal in terms of frequency (10 Hz) and waveform. Operational reliability was confirmed by stable vibration testing in air for more than 3000 cycles. Proposed electrothermal mechanism considering the alternating current-induced periodic thermal expansion and contraction of the composite film was discussed. The unique actuation performance of the carbon nanotube-biopolymer composite, coupled with ease of fabrication, low driven voltage, tunable vibration, reliable operation, and good biocompatibility, shows great possibility for implementation of dry actuators in artificial muscle and microsystems for biomimetic applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|