Fundamental Study of Application of Piezoelectric Chiral Polymer to Actuator

Inuzuka, Yusuke; Onishi, Katsuki; Kinoshita, Shunsuke; Nakashima, Yasuto; Nagata, Takahiro; Yamane, Hirotsugu; Nakai, Takaaki; Kataoka, Takuya; Ito, Shuhei

doi:10.1143/jjap.51.09ld15

Cited by 25 publications

(16 citation statements)

References 19 publications

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“…However, the pyroelectric property of PVDF makes it possible to detect temperature signals, which may be confused with a pressure signal in E‐skin applications. As one of widely used piezoelectric polymers, poly( l ‐lactic acid) (PLLA) is synthesized by the polymerization of l ‐lactic acid monomers and it can be used for applications of actuators, smart fabric, and filtration devices 28–30. The piezoelectric polymer PLLA features a large number of CO double bonds with an angle of 125° relative to the main carbon chain, and the parallel dipole component of the CO dipoles can show polarity under shear stress 31,32.…”

Section: Introductionmentioning

confidence: 99%

Biocompatible Poly(lactic acid)‐Based Hybrid Piezoelectric and Electret Nanogenerator for Electronic Skin Applications

Gong

Zhang

et al. 2020

Adv Funct Materials

122

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Human machine interface (HMI) devices, which can convert human motions to electrical signals to control/charge electronic devices, have attracted tremendous attention from the engineering and science fields. Herein, the high output voltage from a nonpiezoelectric meso‐poly(lactic acid) (meso‐PLA) electret‐based triboelectric nanogenerator (NG) is combined with the relatively high current from a double‐layered poly(l‐lactic acid) (PLLA)‐based piezoelectric nanogenerator (PENG) for an E‐skin (electronic skin) (HMI) device application. The hybrid NG with a cantilever structure can generate an output voltage of 70 V and a current of 25 µA at the resonance frequency of 19.7 Hz and a tip load of 4.71 g. Moreover, the output power of the hybrid NG reaches 0.31 mW, which is 11% higher than that from the PLLA‐based PENG. Furthermore, it is demonstrated that the PLA‐based hybrid NG can be used to turn a light‐emitting diode light on and off through an energy management circuit during a bending test. Finally, it is demonstrated that the PLA‐based woven E‐skin device can generate the output signals of 35 V (Voc) and 1 µA (Isc) during an elbow bending test. The advantages of biocompatible, ease of fabrication, and relatively high output power in the hybrid NG device show great promise for future E‐skin applications.

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Section: Introductionmentioning

confidence: 99%

Biocompatible Poly(lactic acid)‐Based Hybrid Piezoelectric and Electret Nanogenerator for Electronic Skin Applications

Gong

Zhang

et al. 2020

Adv Funct Materials

122

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“…PLLA is more widely utilized for making piezoelectric devices while PDLA is often used as an agent to improve the piezoelectric and thermo-mechanical properties of PLLA. [35,[111][112][113][114] Compared with PVDF, PLLA exhibits a higher shear piezoelectric coefficient value (d 14 ) of ≈12 pm V −1 . [115] Studies have demonstrated that the chirality of the asymmetric carbon atoms in PLLA affects its shear piezoelectric constant.…”

Section: Pla-based Nanofibersmentioning

confidence: 99%

A Review on Wearable Electrospun Polymeric Piezoelectric Sensors and Energy Harvesters

Mirjalali

Varposhti

Abrishami

et al. 2022

Macro Materials & Eng

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In recent years, wearable sensors and energy harvesters have shown great potential for a wide range of applications in personalized healthcare, robotics, and human-machine interfaces. Among different types of materials used in wearable electronics, piezoelectric materials have gained enormous attention due to their exclusive ability to harvest energy from ambient sources. Piezoelectric materials can be utilized as sensing elements in wearable sensors while harvesting biomechanical energy. Electrospun piezoelectric polymer nanofibers are extensively investigated due to their high flexibility, ease of processing, biocompatibility, and higher piezoelectric property (in contrast to their corresponding cast films). However, as compared to piezoceramic materials, they mostly exhibit relatively lower piezoelectric coefficients. Therefore, considerable efforts have been devoted to improving the piezoelectricity of electrospun polymer nanofibers recently, resulting in significant advances. This review presents a broad overview of these advances including new material, structure designs as well as new strategies to enhance piezoelectricity of electrospun polymer nanofibers. The challenges in achieving high mechanical performance as well as high piezoelectricity are particularly discussed. The main motivation of this review is to examine these challenges and highlight effective approaches to achieving high-performance piezoelectric sensors and energy harvesters for wearable technologies.

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“…Due to its bio-resorption, low toxicity, degradation, biocompatibility and useful mechanical performance, its presence in the medical field continues to grow. PLA can exist as linear polyester stereoisomer forms, including (poly(L-lactic acid) (PLLA), poly(D-lactic acid) (PDLA) and poly(D,L-lactic acid) (PDLLA) [72,132]. PLLA has optical activity characteristics and PDLA exists as its optical isomer.…”

Section: Electroactive Polymersmentioning

confidence: 99%

Electroactive polymers for tissue regeneration: Developments and perspectives

Ning

Zhou

Tan

et al. 2018

Progress in Polymer Science

258

175

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Human body motion can generate a biological electric field and a current, creating a voltage gradient of -10 to -90 mV across cell membranes. In turn, this gradient triggers cells to transmit signals that alter cell proliferation and differentiation. Several cell types, counting osteoblasts, neurons and cardiomyocytes, are relatively sensitive to electrical signal stimulation. Employment of electrical signals in modulating cell proliferation and differentiation inspires us to use the electroactive polymers to achieve electrical stimulation for repairing impaired tissues. Electroactive polymers have found numerous applications in biomedicine due to their capability in effectively delivering electrical signals to the seeded cells, such as biosensing, tissue regeneration, drug delivery, and biomedical implants. Here we will summarize the electrical characteristics of electroactive polymers, which enables them to electrically influence cellular function and behavior, including conducting polymers, piezoelectric polymers, and polyelectrolyte gels. We will also discuss the biological response to these electroactive polymers under electrical stimulation. In particular, we focus this review on their applications in regenerating different tissues, including bone, nerve, heart muscle, cartilage and skin. Additionally, we discuss the challenges in tissue regeneration applications of electroactive polymers. We conclude that electroactive polymers have a great potential as regenerative biomaterials, due to their ability to stimulate desirable outcomes in various electrically responsive cells.

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Fundamental Study of Application of Piezoelectric Chiral Polymer to Actuator

Cited by 25 publications

References 19 publications

Biocompatible Poly(lactic acid)‐Based Hybrid Piezoelectric and Electret Nanogenerator for Electronic Skin Applications

Biocompatible Poly(lactic acid)‐Based Hybrid Piezoelectric and Electret Nanogenerator for Electronic Skin Applications

A Review on Wearable Electrospun Polymeric Piezoelectric Sensors and Energy Harvesters

Electroactive polymers for tissue regeneration: Developments and perspectives

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