Abstract
Limitations of ceramic piezomaterials (brittleness, toxicity of lead-containing samples, difficulties of complicated shapes preparations, etc.) call for the research in the field of piezoelectric polymers. One of them is polyvinylidene fluoride (PVDF). It could be prepared in various forms: thin films, bulk samples, fibers. PVDF fibers attract the most attention because of high flexibility, lightweight, mechanical stability, chemical inertness. Properties of PVDF fibers can be tuned using dopant material: ceramic particles, metal nanoparticles, graphite materials as graphene oxide or carbon nanotubes (CNT).
Highlights
(vinylidene fluoride), Polyvinylidene fluoride (PVDF) and its copolymers are a class of high-performance polymers that have the highest dielectric constant and electroactive response, as well as piezoelectric, pyroelectric and ferroelectric effects
Electroactive properties are applied in various fields, such as biomedicine, energy generation and storage, monitoring and control, and include the development of sensors and actuators, separating and filtering membranes and intelligent scaffolding (Martins et al 2014)
The orientation of produced fibers is given by amount of rotation per minute the fibers are collected on counter electrode
Summary
(vinylidene fluoride), PVDF and its copolymers are a class of high-performance polymers that have the highest dielectric constant and electroactive response, as well as piezoelectric, pyroelectric and ferroelectric effects. Well−characterized properties make the PVDF leader of piezoelectric polymers It can boast extraordinary mechanicals and chemical parameters such as: deformation resistance, absorption resistance, chemical resistance, stability to radiation, high working temperature (from –49 ° to 302 °F), insulating capabilites; radiation stability, high Curie point (217.4 °F), high degree of purity. Such combination of properties makes PVDF useful for varieties of application where the polymer is used in: aerospace, biosensors, biotechnologies, pharmaceutical, microelectronics, pressure sensors, insulator for batteries. The composite materials can be characterized by different spectroscopic and microscopic techniques such as XRD, FTIR, thermal and FE-SEM analyses (Ţălu, 2015; Ţălu et al, 2018; Mwema et al, 2020)
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