Control of bending electrostriction in polyurethane films by doping with salt

Watanabe, Masashi; Kato, Takahiro; Hirako, Yoshiaki; Shirai, Hirofusa; Hirai, Toshihiro

doi:10.1002/polb.1083.abs

Cited by 2 publications

(5 citation statements)

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“…Thus, the dopants controlled the bending direction. (In our earlier publication,25 we reported similar and more detailed results with a similar polyurethane. )…”

Section: Resultssupporting

confidence: 74%

“…As we reported earlier,24, 25 the field application mainly expands one surface of the film, although the other surface slightly expands. For example, when the mainly expanded surface is the cathode, the film bends to the anode side [Fig.…”

Section: Resultssupporting

confidence: 66%

“…In our earlier publication,25 we reported that doping the polyurethane with a salt could control the bending phenomenon. That is, some salts work to improve the bending degree, and others work to change the bending direction.…”

Section: Introductionmentioning

confidence: 94%

“…We have developed actuators using polyurethane as such a dry material 24–27. They are made of a polyurethane film coated with a thin gold electrode on either surface.…”

Section: Introductionmentioning

confidence: 99%

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Space charge distribution in bending‐electrostrictive polyurethane films doped with salts

Watanabe

Hirai

2003

J Polym Sci B Polym Phys

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Polyurethane films bent during a field application (1.5 MV/m). Doping the films with salts controlled the bending direction. With ZnBr 2 , Zn(ClO 4 ) 2 , and Cu(ClO 4 ) 2 as the dopants, the films bent to the anode side. Contrarily, CH 3 COONa-doped, NaBrdoped, and undoped films bent to the cathode side. We also measured the space charge distribution in the films to clarify the factor that determined the direction. The measurements were carried out with a pulsed electroacoustic method. For the films that bent to the anode side, a positive space charge was observed inside the cathode during the field application. However, for the films that bent to the cathode side, there was a negative space charge inside the anode. Thus, the dopants also controlled the space charge distribution, which corresponded to the bending direction. These results suggested a causality between the field-induced bend of the film and the space charge distribution.

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“…Thus, the dopants controlled the bending direction. (In our earlier publication,25 we reported similar and more detailed results with a similar polyurethane. )…”

Section: Resultssupporting

confidence: 74%

Section: Resultssupporting

confidence: 66%

Section: Introductionmentioning

confidence: 94%

“…We have developed actuators using polyurethane as such a dry material 24–27. They are made of a polyurethane film coated with a thin gold electrode on either surface.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Space charge distribution in bending‐electrostrictive polyurethane films doped with salts

Watanabe

Hirai

2003

J Polym Sci B Polym Phys

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“…Electronic EAPs consist of materials such as electrostrictive elastomers, ferroelectric polymers, and dielectric elastomers (DEs). Among them, DEs offer excellent performance in an unusually broad range of applications covering actuators and sensors. − Commercial acrylic adhesives, − silicones, − and polyurethanes − are the most studied DEs.…”

Section: Introductionmentioning

confidence: 99%

Achieving High Performance Electric Field Induced Strain: A Rational Design of Hyperbranched Aromatic Polyamide Functionalized Graphene–Polyurethane Dielectric Elastomer Composites

et al. 2015

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Dielectric elastomers have great potentials as flexible actuators in micro-electromechanical systems (MEMS) due to their large deformation, light weight, mechanical compliancy, and low cost. The low dielectric constant of these elastomers requires a rather high voltage electric field, which has greatly limited their applications. In this work, a diaphragm-type flexible microactuator comprising a hyperbranched aromatic polyamide functionalized graphene (HAPFG) filler embedded into the polyurethane (PU) dielectric elastomer matrix is described. The rational designed HAPFG sheets exhibits uniform dispersion in PU matrix and strong adhesion with the matrix by hydrogen-bond coupling. Consequently, the HAPFG-PU composites possess high dielectric performance and low loss modulus. The effect of hyperbranched aromatic polyamide functionalized graphene on high voltage electric field induced strain was experimentally investigated using the Fotonic sensor. The high electric field response of the composite was discussed by applying different kinds of alternating-current field. In addition, a comparison of the breakdown strength between the HAPFG-PU composite and the pure PU was carried out.

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Control of bending electrostriction in polyurethane films by doping with salt

Cited by 2 publications

References 0 publications

Space charge distribution in bending‐electrostrictive polyurethane films doped with salts

Space charge distribution in bending‐electrostrictive polyurethane films doped with salts

Achieving High Performance Electric Field Induced Strain: A Rational Design of Hyperbranched Aromatic Polyamide Functionalized Graphene–Polyurethane Dielectric Elastomer Composites

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