Synthesis and characterization of spin-coated clay/PVDF thin films

There was a fast development of various piezoelectric materials in the past two decades due to their numerous applications. Piezoelectric materials made up of natural quartz crystals were used in ultrasonic detectors in the early days. Later, the modern synthetic piezoelectric materials known as ferroelectric ceramics, such as Lead zirconate titanate (PZT), were developed, which were capable of exhibiting piezoelectricity several times greater than natural crystals. Later, the declination of ceramics began as they contained large amounts of lead content, which was considered harmful to both humans and the environment. Finally, a new era in the history of piezoelectric materials boomed with the outbreak of polymer materials. Polyvinylidene fluoride (PVDF) is a piezoelectric polymer material that has drawn the attention of researchers, from the family of fluoropolymers and has paved a new path in the field of polymer science and technology. PVDF has earned the renown of being an excellent piezoelectric material due to its unique and versatile exhibition of piezoelectric and dielectric properties. Furthermore, PVDF can exhibit incredible thermal stability and mechanical strength with flexible processing and low cost compared with the other piezoelectric crystals and ceramics. This comprehensive review mainly focuses on the evolution of piezoelectric materials from crystals to polymers with their advantages and significant drawbacks. Thus, the main objective of this review is to present a detailed description of PVDF concerning its uniqueness as a piezoelectric material and versatile properties, followed by various advanced fabrication techniques and their impact on doping various nanofillers with respective applications. Though PVDF is renowned for its significant applications such as sensors, actuators, energy harvesting and biomedical devices, a tabular chart has been specially framed in one‐liners which highlights the real‐time experimental outcomes where PVDF can be specified as a futuristic polymer for multifunctional applications. A few reports resulted that with increasing graphite and MWCNT fillers into PVDF film, the EMI shielding effectiveness value rose to 14.64 dB at a frequency of 8‐12 Hz. A few reports resulted that by adding ZnO and BaTiO3, the electrical output increased significantly, which is more suitable as a nanogenerator. After an extensive literature survey, we found that reviews are very limited and restricted to specific applications and properties. This review is an overall brief explanation of enormous research works carried out by various experts and presented in a modest way with pictorial and tabular representation for the convenience of researchers. Finally, this review attempts to provide source material to direct researchers towards a fertile area of research with a better understanding of the fundamentals and advancement of polymer piezoelectric materials.

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“…Therefore, further polarization is necessary to receive a piezoelectric response. [172][173][174][175]…”

Section: Spin Coating Methodsmentioning

confidence: 99%

Polyvinylidene fluoride, an advanced futuristic smart polymer material: A comprehensive review

Nivedhitha

Jeyanthi

2022

Polymers for Advanced Techs

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“…In this step, polymers are processed in a high-pressure environment and electric fields. Finally, the polymers are squeezed into thin films for further production of piezoelectric sensors [ 45 , 46 , 47 ].…”

Section: Mechanisms Of Piezoresistive and Piezoelectric Techniquesmentioning

confidence: 99%

“…For example, carbon nanotubes and graphene-based sensors have high mechanical flexibility and stretchability; they can maintain high sensitivity under bending and pressing. Therefore, they can be used for PSD [ 4 , 5 , 7 , 12 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 ].…”

Section: Comparison and Review Of Piezoresistive And Piezoelectric Ps...mentioning

confidence: 99%

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Comparison between Piezoelectric and Piezoresistive Wearable Gait Monitoring Techniques

Zhang

Chen

et al. 2022

Materials

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Insole plantar stress detection (PSD) techniques play an important role in gait monitoring. Among the various insole PSD methods, piezoelectric- and piezoresistive-based architectures are broadly used in medical scenes. Each year, a growing number of new research outcomes are reported. Hence, a deep understanding of these two kinds of insole PSD sensors and state-of-the-art work would strongly benefit the researchers in this highly interdisciplinary field. In this context, this review article is composed of the following aspects. First, the mechanisms of the two techniques and corresponding comparisons are explained and discussed. Second, advanced materials which could enhance the performance of current piezoelectric and piezoresistive insole prototypes are introduced. Third, suggestions for designing insole PSD prototypes/products for different diseases are offered. Last, the current challenge and potential future trends are provided.

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“…22,26,27 Some experiments have been performed to fabricate the PVDF membranes by the well-known spin coating technology. 20,[28][29][30][31][32] An increase in the spinning speed while using the conventional spin coating method leads to an increase in the horizontal centrifugation force parallel to the substrate surface. The increase in horizontal centrifugation causes a stretch in the polymeric network of PVDF.…”

Section: Introductionmentioning

confidence: 99%

Compressibility and crystalline structures of PVDF membranes under elevated gravity acceleration by two-axis spin coating technology

Mahmoodi

Hamedi

Zhong

et al. 2022

Phys. Chem. Chem. Phys.

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Synthesis and characterization of spin-coated clay/PVDF thin films

Cited by 8 publications

References 30 publications

Polyvinylidene fluoride, an advanced futuristic smart polymer material: A comprehensive review

Polyvinylidene fluoride, an advanced futuristic smart polymer material: A comprehensive review

Comparison between Piezoelectric and Piezoresistive Wearable Gait Monitoring Techniques

Compressibility and crystalline structures of PVDF membranes under elevated gravity acceleration by two-axis spin coating technology

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