Results 221 to 230 of about 290,243 (268)
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IEEE Transactions on Biomedical Engineering, 2015
Nanostructures of polyvinyledenedifluoride-tetrafluoroethylene (PVDF-TrFE), a semicrystalline polymer with high piezoelectricity, results in significant enhancement of crystallinity and better device performance as sensors, actuators, and energy harvesters.
Tushar Sharma +4 more
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Nanostructures of polyvinyledenedifluoride-tetrafluoroethylene (PVDF-TrFE), a semicrystalline polymer with high piezoelectricity, results in significant enhancement of crystallinity and better device performance as sensors, actuators, and energy harvesters.
Tushar Sharma +4 more
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Journal of Membrane Science, 2017
Abstract Novel electrospun nanofibrous microfiltration membranes (ENMs) are fabricated by using sulfonated polyvinylidene fluoride (S-PVDF)/PVDF and S-PVDF/PVDF/graphene oxide (GO) with negative charge which was prepared by electrospinning technique.
A. Ahmadi +4 more
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Abstract Novel electrospun nanofibrous microfiltration membranes (ENMs) are fabricated by using sulfonated polyvinylidene fluoride (S-PVDF)/PVDF and S-PVDF/PVDF/graphene oxide (GO) with negative charge which was prepared by electrospinning technique.
A. Ahmadi +4 more
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Piezoelectricity of PVDF/PUE, PVDF/PMMA and PVDF/(PMMA+BaTiO/sub 3/) laminates
[1991 Proceedings] 7th International Symposium on Electrets (ISE 7), 1992The author suggests the preparation of piezoelectric laminates using PVDF (polyvinylidene fluoride) polymer film (a), polyester urethane elastomer (PUE) film (b), PMMA (polymethyl methacrylate) film (c), and (PMMA+BaTiO/sub 3/) composite film (d).
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ACS Applied Materials & Interfaces, 2015
The exploitation of soft conducting polymer-based actuators suffers from two main shortcomings: their short life cycle and the reproducibility of the fabrication techniques. The short life cycle usually results from the delamination of the components due to stresses at the interface during the actuation. In this work, to achieve strong adhesion to poly(
Simaite, Aiva +3 more
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The exploitation of soft conducting polymer-based actuators suffers from two main shortcomings: their short life cycle and the reproducibility of the fabrication techniques. The short life cycle usually results from the delamination of the components due to stresses at the interface during the actuation. In this work, to achieve strong adhesion to poly(
Simaite, Aiva +3 more
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Curved PVDF airborne transducer
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 1999In the application of airborne ultrasonic ranging measurement, a partially cylindrical (curved) PVDF transducer can effectively couple ultrasound into the air and generate strong sound pressure. Because of its geometrical features, the ultrasound beam angles of a curved PVDF transducer can be unsymmetrical (i.e., broad horizontally and narrow ...
H, Wang, M, Toda
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Ultrasonic transducers using PVDF
Ferroelectrics, 1991In a research program on ultrasonic transducers. PVDF has been used for structures needing thinness, flexibility and low acoustic impedance. The specific applications described include focused conical transducers for NDT, array transducers for medical holographic B-scan imaging and transmitters/ receivers for zetapotential measurements in colloidal ...
Jussila, Salme +7 more
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ECS Meeting Abstracts, 2015
Blends and composites of various perfluoroionomers and uncharged polymers, e.g., poly(vinylidene fluoride) (PVDF), have been widely studied as the proton conducting membrane material for direct methanol and hydrogen/air fuel cells. The general idea of blending was to decouple the mechanical and swelling properties of a membrane from its proton ...
Dos Santos, L. +8 more
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Blends and composites of various perfluoroionomers and uncharged polymers, e.g., poly(vinylidene fluoride) (PVDF), have been widely studied as the proton conducting membrane material for direct methanol and hydrogen/air fuel cells. The general idea of blending was to decouple the mechanical and swelling properties of a membrane from its proton ...
Dos Santos, L. +8 more
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Adhesion and morphology of PVDF/PMMA and compatibilized PVDF/PS interfaces
Polymer, 1991Abstract The morphology of the interface between miscible and immiscible polymer pairs was investigated. For the PVDF/PMMA system, which has a highly exothermic enthalpy of mixing, complex structures suggest the occurrence of bulk convective motion at the contact area between the two polymer melts.
D.Freitas Siqueira +2 more
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Confined crystallization of PVDF and a PVDF‐TFE copolymer in nanolayered films
Journal of Polymer Science Part B: Polymer Physics, 2011AbstractLayer‐multiplying coextrusion was used in conjunction with isothermal recrystallization to study the confined crystallization of polyvinylidene fluoride (PVDF) and polyvinylidene fluoride‐tetrafluoroethylene (PVDF‐TFE) using polycarbonate (PC) and polysulfone (PSF) as confining materials.
Matt Mackey +3 more
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Some features of the electric relaxation in PVDF and PVDF-PZT composites
Proceedings of 8th International Symposium on Electrets (ISE 8), 2002It is shown that relaxation of the residual polarization in PVDF can be caused by spontaneous switching of a portion of the polarized volume to its initial electric state. The phenomenon is observed as Barkhausen's pulses. The duration of the pulse, the magnitude of a leap, and the switched volume per pulse are calculated.
A.E. Sergeeva, S.N. Fedosov, P. Pissis
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