Improving the actuating response of carbon nanotube/ionic liquid composites by the addition of conductive nanoparticles

Sugino, Takushi; Kiyohara, Kenji; Takeuchi, Ichiroh; Mukai, Ken; Asaka, Kinji

doi:10.1016/j.carbon.2011.04.056

Cited by 67 publications

(55 citation statements)

References 40 publications

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“…Moreover, for the same applied voltage, the strain generated increased up to twenty-fi ve times. However, the superior performance of CNTs/ PPy electrode only appeared under low frequency, which was similar to those reported by Asaka et al [ 42 ] This was caused by slow process of farradic reactions of PPy which could dramatically increase the strain.…”

Section: Single Walled Carbon Nanotubes Based Electrode Materialssupporting

confidence: 79%

“…Recently, Asaka et al have added polyaniline (PANI) and carbon black (CB) into the electrode to increase its conductivity and capacitance. [ 42 ] PANI, one of the most promising conductive polymers not only for EAP actuators, [101][102][103] but also for supercapacitors, [ 104 ] has high specifi c capacitance and easy synthetic process. By simply mixing PANI/CB composite nanoparticles (NPs) with SWCNTs, IL and PVDF-HFP in DMAc, the gelatinous solution for preparing electrode layer was obtained.…”

Section: Single Walled Carbon Nanotubes Based Electrode Materialsmentioning

confidence: 99%

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Carbon Nanotube and Graphene‐based Bioinspired Electrochemical Actuators

2013

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Bio-inspired actuation materials, also called artificial muscles, have attracted great attention in recent decades for their potential application in intelligent robots, biomedical devices, and micro-electro-mechanical systems. Among them, ionic polymer metal composite (IPMC) actuator has been intensively studied for their impressive high-strain under low voltage stimulation and air-working capability. A typical IPMC actuator is composed of one ion-conductive electrolyte membrane laminated by two electron-conductive metal electrode membranes, which can bend back and forth due to the electrode expansion and contraction induced by ion motion under alternating applied voltage. As its actuation performance is mainly dominated by electrochemical and electromechanical process of the electrode layer, the electrode material and structure become to be more crucial to higher performance. The recent discovery of one dimensional carbon nanotube and two dimensional graphene has created a revolution in functional nanomaterials. Their unique structures render them intriguing electrical and mechanical properties, which makes them ideal flexible electrode materials for IPMC actuators in stead of conventional metal electrodes. Currently although the detailed effect caused by those carbon nanomaterial electrodes is not very clear, the presented outstanding actuation performance gives us tremendous motivation to meet the challenge in understanding the mechanism and thus developing more advanced actuator materials. Therefore, in this review IPMC actuators prepared with different kinds of carbon nanomaterials based electrodes or electrolytes are addressed. Key parameters which may generate important influence on actuation process are discussed in order to shed light on possible future research and application of the novel carbon nanomateials based bio-inspired electrochemical actuators.

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Section: Single Walled Carbon Nanotubes Based Electrode Materialssupporting

confidence: 79%

Section: Single Walled Carbon Nanotubes Based Electrode Materialsmentioning

confidence: 99%

Carbon Nanotube and Graphene‐based Bioinspired Electrochemical Actuators

2013

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“…To overcome these disadvantages, the use of new ionomers instead of commercial Nafion (perfluorosulfonic acid) and Flemion (perfluorocarboxylic acid) membranes, nanocarbon-based electrodes, and ionic liquid solvents instead of water are the three new main directions in this area, and much progress has been achieve. [8][9][10][11][12][13] The sensing functions of IPMCs, which can be used to design sensors 14 or energy harvesters, 15,16 have also been explored. All of these studies show the great potential of IPMCs, and understanding their working mechanisms is becoming increasingly important in IPMC modification and device development.…”

Section: Introductionmentioning

confidence: 99%

Multiphysics of ionic polymer–metal composite actuator

Zhu

Asaka

Chang

et al. 2013

Journal of Applied Physics

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Articles you may be interested inPhysical interpretation of deformation evolvement with water content of ionic polymer-metal composite actuator Dynamic model of ion and water transport in ionic polymer-metal composites AIP Advances 1, 040702 (2011); 10.1063/1.3668286 An explicit physics-based model of ionic polymer-metal composite actuatorsWater-based ionic polymer-metal composites (IPMCs) exhibit complex deformation properties, especially with decreasing water content. Based on our experimental understanding, we developed a systemic actuation mechanism for IPMCs in which the water swelling was taken as the basic cause of deformation. We focused on Nafion-IPMC, and formulated a multiphysical model to describe the complicated deformation properties. The model emphasizes pressure-induced convection fluxes and the significance of the water distribution on deformation. It shows that there are three eigen stresses activated by the migration of ions and water, namely, osmotic pressure, electrostatic stress, and capillary pressure. The model also provides a convenient way of simultaneously handling the internal eigen stresses and the external mechanical load. In this paper, we used a fundamental model, which only considered the hydrostatic pressure in the multiphysical model, to analyze the general transport properties of cations and water by numerical methods. Three effects were investigated: (1) the inter-coupling effects between cations and water, which slow down cation migration and attenuate the back-diffusion of water; (2) the pressure effect, which rarely influences the electric field and the cation distribution, but greatly changes the profile of the water concentration and then the deformation behavior; and (3) the hydration effect, which has a significant impact on the distribution profiles of the cations and the electrical potential. In contrast to the findings of traditional studies, the water concentration displays an almost uniform gradient across the thickness in the bulk, and the cation concentration at the cathode is greatly reduced by the volume effect of the hydrated cations. V C 2013 AIP Publishing LLC.

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“…1-Ethyl-3-methylimidazolium tetrafluoroborate (EMIBF 4 ) (Tokyo Chemical Industry Co., Ltd.) and polyvinyliden fuluorideco-hexafluoroborate (PVDF-HFP: Kynar Flex2801) (Archema Chemical Inc.) were used as an internal and a base polymer, respectively. A typical experimental procedure to prepare the electrode and electrolyte films of actuators is mentioned below [4], [5].…”

Section: A Electrode Materials and Construction Of Actuatorsmentioning

confidence: 99%

Integration of CNT-based actuators for bio-medical applications — Example printed circuit board CNT actuator pipette

Addinall

Sugino

Neuhaus

et al. 2014

2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics

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In order to strengthen the position of CNT actuator technology and fasten the transfer of scientific results into application development and market introduction scientific institutes AIST Kansai and Fraunhofer IPA cooperated in the field of electroactive polymers.Automated dosing of small amounts of liquids normally involves quite large pipettes and motors for pipette actuation. Miniaturized pipettes can enable new areas, in which micro dosing is demanded and could be particularly beneficial in the field of medical or (bio-) chemical applications.The approach was the direct integration of a bending CNT actuator into a PCB design, which enables a frictionless induction of movement onto a liquid. The driving electronics control the actuator with a low voltage and can be placed on the same PCB.The result is a smooth, tailorable dispensation of liquid from the pipette with the ability to integrate the pipette into a fully automated system.

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Improving the actuating response of carbon nanotube/ionic liquid composites by the addition of conductive nanoparticles

Cited by 67 publications

References 40 publications

Carbon Nanotube and Graphene‐based Bioinspired Electrochemical Actuators

Carbon Nanotube and Graphene‐based Bioinspired Electrochemical Actuators

Multiphysics of ionic polymer–metal composite actuator

Integration of CNT-based actuators for bio-medical applications — Example printed circuit board CNT actuator pipette

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