Origin of enhanced piezoelectric energy harvesting in all-polymer-based core–shell nanofibers with controlled shell-thickness

Han, Ju; Kim, Ji Ho; Choi, Hong Je; Kim, Seung Won; Sung, Sun Min; Kim, Min Sung; Choi, Bo Kyoung; Paik, Jong Hoo; Lee, Joon Seok; Cho, Yong Soo

doi:10.1016/j.compositesb.2021.109141

Cited by 26 publications

(2 citation statements)

References 40 publications

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“…Overall, the output voltage generated by the composite was three times greater than that generated by the pure PVDF–TrFE fibrous membrane (0.5 V) at the same applied force. Han et al designed core–shell piezoelectric NF-based poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) via electrospinning. They measured the output voltage and current to be 8.76 V and 547 nA, respectively.…”

Section: Application Of Pvdf-based Piezoelectric Materials In Energy ...mentioning

confidence: 99%

Nanoparticle-Enhanced β-Phase Formation in Electroactive PVDF Composites: A Review of Systems for Applications in Energy Harvesting, EMI Shielding, and Membrane Technology

Gebrekrstos

Muzata

Ray

2022

ACS Appl. Nano Mater.

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With the continuous advancement of electronic devices, lightweight, flexible, and easily processable materials have gained substantial techno-commercial importance. Most electronic devices must possess a lightweight, high conductivity, high dielectric permittivity, low dielectric loss, and high breakdown strength. Hence, polymer-based piezoelectric materials are in great demand for design and development in energy storage, electromagnetic interference (EMI) shielding, and ultrafiltration applications. Among the piezoelectric polymers, poly(vinylidene fluoride) (PVDF) with a predominantly polar β-phase is the most important. However, the main drawbacks of the PVDF matrix are its relatively low electrical conductivity and dielectric permittivity, and poor energy harvesting and EMI shielding performance. In this context, the incorporation of conductive nanofillers such as reduced graphene oxides, graphene quantum dots, and carbon nanotubes in the PVDF matrix has attracted considerable interest owing to their extraordinary properties. The final properties of these piezoelectric composites depend on the preparation methods, structural conformation, processing conditions, dispersion of nanofillers in the matrix, surface modification of fillers, and specific or nonspecific interaction of the fillers with the PVDF matrix. Herein, we have critically reviewed the formation mechanism of the electroactive β-phase in PVDF, the effects of nanofillers on the phase transformation of PVDF (dispersion and specific interaction), and the correlation of β-phase PVDF piezoelectric and dielectric properties with energy harvesting, EMI shielding, and membrane applications.

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Section: Application Of Pvdf-based Piezoelectric Materials In Energy ...mentioning

confidence: 99%

Nanoparticle-Enhanced β-Phase Formation in Electroactive PVDF Composites: A Review of Systems for Applications in Energy Harvesting, EMI Shielding, and Membrane Technology

Gebrekrstos

Muzata

Ray

2022

ACS Appl. Nano Mater.

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“…In addition, core–shell NPs are planed so that the shell material can improve the oxidative stability, thermal stability or reactivity of the core material or a cheap core material is used to transport the costly shell material 3 – 5 . Core–shell NPs have many usages in biomedical research 6 , MRI 7 – 9 , catalysis 10 – 12 , drug delivery 13 , energy harvesting 14 , 15 , plasmonic 16 , 17 , sensors 18 – 20 , etc. Much progress has been chance in the development of rational synthetic methods for the production of various core–shell NPs.…”

Section: Introductionmentioning

confidence: 99%

Fe3O4@C@MCM41-guanidine core–shell nanostructures as a powerful and recyclable nanocatalyst with high performance for synthesis of Knoevenagel reaction

Barzkar

Beni

2023

Sci Rep

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In this study, preparation, characterization and catalytic application of a novel core–shell structured magnetic with carbon and mesoporous silica shells supported guanidine (Fe3O4@C@MCM41-guanidine) are developed. The Fe3O4@C@MCM41-guanidine was prepared via surfactant directed hydrolysis and condensation of tetraethyl orthosilicate around Fe3O4@C NPs followed by treatment with guanidinium chloride. This nanocomposite was characterized by using Fourier transform infrared spectroscopy, vibrating sample magnetometry, scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, thermal gravimetric analysis, wide-angle X-ray diffraction and low-angle X-ray diffraction techniques. This nanocomposite have high thermal, chemical stability, and uniform size. Fe3O4@C@MCM41-guanidine catalyst demonstrated high yield (91–98%) to prepare of Knoevenagel derivatives under the solvent free conditions at room temperature in the shortest time. Also, this catalyst was recovered and reused 10 times without significant decrease in efficiency and stability. Fortunately, an excellent level of yield (98–82%) was observed in the 10 consecutive catalyst cycles.

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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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Origin of enhanced piezoelectric energy harvesting in all-polymer-based core–shell nanofibers with controlled shell-thickness

Cited by 26 publications

References 40 publications

Nanoparticle-Enhanced β-Phase Formation in Electroactive PVDF Composites: A Review of Systems for Applications in Energy Harvesting, EMI Shielding, and Membrane Technology

Nanoparticle-Enhanced β-Phase Formation in Electroactive PVDF Composites: A Review of Systems for Applications in Energy Harvesting, EMI Shielding, and Membrane Technology

Fe3O4@C@MCM41-guanidine core–shell nanostructures as a powerful and recyclable nanocatalyst with high performance for synthesis of Knoevenagel reaction

A Review on Wearable Electrospun Polymeric Piezoelectric Sensors and Energy Harvesters

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