Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 145, Issue 2, Pages 839-846Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2010.01.066
Keywords
Polyaniline nanofiber; Actuator; Nanocomposite; Flash-welding; Stimuli-responsive
Funding
- National Science Foundation of China [20534040, 20874039, 20921003]
- National Basic Research Program of China [2007CB936402]
- CAS [110000R082]
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High-performance monolithic actuators responding to acid/base were fabricated based on polyaniline (PANI) nanofibers and polyvinyl alcohol (PVA) nanocomposite. Flash-welding technique was adopted to endow PANI/PVA films with asymmetric structure, which drove rapid reversible actuation in acid/base. Compared with conventional PANI actuators, the PANI/PVA actuators were capable of providing tunable actuation degree and responsive rate, as well as enhanced mechanical properties and reversible repeatability. Moreover, the PANI/PVA actuators had much better recoverability in base than pure PANI nanofiber actuators. On the basis of PANI/PVA monolithic beam, we also fabricated PANI/PVA monolithic cubic boxes which showed tunable folding/unfolding response in acid/base via proper modulation. It is anticipated that the monolithic PANI/PVA nanocomposite actuators with tunable stimuli-responsive properties will have large potential for applications in micromechanical system, on-demand devices, chemical sensors and biomedical materials. (C) 2010 Elsevier B.V. All rights reserved.
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