scholarly journals Electrostrictive and Structural Properties of Poly(Vinylidene Fluoride-Hexafluoropropylene) Composite Nanofibers Filled with Polyaniline (Emeraldine Base)

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3250
Author(s):  
Nikruesong Tohluebaji ◽  
Chatchai Putson ◽  
Nantakan Muensit ◽  
Jureeporn Yuennan
Keyword(s):  
Dielectric Properties ◽  
Structural Properties ◽  
Crystalline Phase ◽  
Phase Structure ◽  
Composite Nanofibers ◽  
Microelectromechanical Systems ◽  
Vinylidene Fluoride ◽  
Emeraldine Base ◽  
Pani Composite ◽  
Poly Vinylidene Fluoride

Previous studies have reported that poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)) copolymers can exhibit large electrostrictive strains depending on the filler. This work examines the electrostrictive and structural properties of P(VDF-HFP) nanofibers modified with conductive polymer polyaniline (PANI). The P(VDF-HFP)/PANI composite nanofibers were prepared by an electrospinning method with different PANI concentrations (0, 0.5, 1, 1.5, 3 and 5 wt.%). The average diameter, water contact angle and element were analyzed by SEM, WCA and EDX, respectively. The crystalline, phase structure and mechanical properties were investigated by XRD, FTIR and DMA, respectively. The dielectric properties and electrostrictive behavior were also studied. The results demonstrated that the composite nanofibers exhibited uniform fibers without any bead formation, and the WCA decreased with increasing amount of PANI. However, a high dielectric constant and electromechanical response were obtained. The electrostrictive coefficient, crystalline, phase structure, dielectric properties and interfacial charge distributions increased in relation to the PANI content. Moreover, this study indicates that P(VDF-HFP)/PANI composite nanofibers may represent a promising route for obtaining electrostrictive composite nanofibers for actuation applications, microelectromechanical systems and sensors based on electrostrictive phenomena.

scholarly journals High Electromechanical Deformation Based on Structural Beta-Phase Content and Electrostrictive Properties of Electrospun Poly(vinylidene fluoride- hexafluoropropylene) Nanofibers

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1817 ◽  
Author(s):  
Nikruesong Tohluebaji ◽  
Chatchai Putson ◽  
Nantakan Muensit
Keyword(s):  
Dielectric Properties ◽  
Smart Materials ◽  
Microelectromechanical Systems ◽  
Vinylidene Fluoride ◽  
Interfacial Polarization ◽  
Surface Charges ◽  
Thermal Compression ◽  
Β Phase ◽  
Interfacial Surface ◽  
Poly Vinylidene Fluoride

The poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)) polymer based on electrostrictive polymers is essential in smart materials applications such as actuators, transducers, microelectromechanical systems, storage memory devices, energy harvesting, and biomedical sensors. The key factors for increasing the capability of electrostrictive materials are stronger dielectric properties and an increased electroactive β-phase and crystallinity of the material. In this work, the dielectric properties and microstructural β-phase in the P(VDF-HFP) polymer were improved by electrospinning conditions and thermal compression. The P(VDF-HFP) fibers from the single-step electrospinning process had a self-induced orientation and electrical poling which increased both the electroactive β-crystal phase and the spontaneous dipolar orientation simultaneously. Moreover, the P(VDF-HFP) fibers from the combined electrospinning and thermal compression achieved significantly enhanced dielectric properties and microstructural β-phase. Thermal compression clearly induced interfacial polarization by the accumulation of interfacial surface charges among two β-phase regions in the P(VDF-HFP) fibers. The grain boundaries of nanofibers frequently have high interfacial polarization, as they can trap charges migrating in an applied field. This work showed that the combination of electrospinning and thermal compression for electrostrictive P(VDF-HFP) polymers can potentially offer improved electrostriction behavior based on the dielectric permittivity and interfacial surface charge distributions for application in actuator devices, textile sensors, and nanogenerators.

Co-Continuous Phase Structure and Properties of Poly(vinylidene Fluoride)/Epoxidized Natural Rubber Blends

2012 ◽  
Vol 626 ◽  
pp. 71-74 ◽  
Author(s):  
Subhan Salaeh ◽  
Charoen Nakason ◽  
Gisèle Boiteux ◽  
Philippe Cassagnau
Keyword(s):  
Dielectric Properties ◽  
Natural Rubber ◽  
Phase Structure ◽  
Vinylidene Fluoride ◽  
Grain Morphology ◽  
Continuous Phase ◽  
Epoxidized Natural Rubber ◽  
Morphological Properties ◽  
Blending Method ◽  
Poly Vinylidene Fluoride

Thermoplastic elastomer based on poly (vinylidene fluoride) (PVDF) and epoxidized natural rubber (ENR) blends at 50/50 by weight with different type of ENR (i.e., ENR with 25 and 50 mol% epoxide which are called as ENR-25 and ENR-50, respectively) has been prepared by melt blending method. Difference content of epoxide groups in ENR molecules on dynamic mechanical properties, dielectric properties and morphological properties of blends were investigated. The morphology reveals the co-continuous phase structure of PVDF and ENR phases. Furthermore, ENR-50/PVDF blend showed finer grain morphology and the glass transition (Tg) of the rubber phase was shifted to lower temperature. The structure of the blends correlated well with permittivity (ε) in dielectric properties with the permittivity of PVDF/ENR-50 higher than that of PVDF/ENR-25.

scholarly journals 3D-printed barium titanate/poly-(vinylidene fluoride) nano-hybrids with anisotropic dielectric properties

2017 ◽  
Vol 5 (47) ◽  
pp. 12430-12440 ◽  
Author(s):  
N. Phatharapeetranun ◽  
B. Ksapabutr ◽  
D. Marani ◽  
J. R. Bowen ◽  
V. Esposito
Keyword(s):  
Dielectric Properties ◽  
Barium Titanate ◽  
Vinylidene Fluoride ◽  
Anisotropic Dielectric ◽  
Poly Vinylidene Fluoride ◽  
3D Printed ◽  
Dielectric Devices

“3D-printed” anisotropy BTNFs/PVDF nanohybrids are successfully fabricated by the FDM technique which is attractive for developing novel functionalities in dielectric devices.

Effects of processing methods on dielectric properties of BaTiO3/poly(vinylidene fluoride) nanocomposites

2015 ◽  
Vol 146 ◽  
pp. 1-5 ◽  
Author(s):  
Kanyapak Silakaew ◽  
Wantana Saijingwong ◽  
Keerati Meeporn ◽  
Santi Maensiri ◽  
Prasit Thongbai
Keyword(s):  
Dielectric Properties ◽  
Vinylidene Fluoride ◽  
Processing Methods ◽  
Poly Vinylidene Fluoride

Simulation of dielectric properties of poly(vinylidene fluoride)

2016 ◽  
Vol 501 (1) ◽  
pp. 169-172
Author(s):  
O. G. Maksimova ◽  
A. V. Maksimov
Keyword(s):  
Dielectric Properties ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride
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