Fabrication and characterization of flexible films of poly(vinylidene fluoride)/Pb(Fe0.5Ti0.5)O3−δ multi-ferroic nano-composite

RSC Advances ◽  
2016 ◽  
Vol 6 (49) ◽  
pp. 42892-42898 ◽  
Author(s):  
Snehlata Aggarwal ◽  
Sreeja K. S. ◽  
S. Chakrabarti ◽  
V. R. Palkar ◽  
Arup R. Bhattacharyya
Keyword(s):  
Room Temperature ◽  
Vinylidene Fluoride ◽  
Nanocomposite Films ◽  
Nano Composite ◽  
Flexible Films ◽  
Poly Vinylidene Fluoride ◽  
Fabrication And Characterization

The ferroelectric, magnetic and magnetocapacitive measurements at room temperature corroborate the multiferroic nature of poly(vinylidene fluoride)–Pb(Fe0.5Ti0.5)O3−δ (PTFO) nanocomposite films with significant magnetodielectric coupling.

Preparation and Characterization of Modified PVDF-g-PSSA Membrane

2010 ◽  
Vol 152-153 ◽  
pp. 44-50 ◽  
Author(s):  
Gui Bao Guo ◽  
Er Ding Han ◽  
Sheng Li An
Keyword(s):  
Relative Humidity ◽  
Sodium Silicate ◽  
Room Temperature ◽  
Proton Exchange Membrane ◽  
Vinylidene Fluoride ◽  
Proton Exchange ◽  
Poly Vinylidene Fluoride ◽  
Relative Humidity Range ◽  
Exchange Membrane

A new method based on a solution graft technique was used to prepare poly (vinylidene fluoride) grafted polystyrene sulfonated acid (PVDF-g-PSSA) proton exchange membrane. Polystyrene is grafted into PVDF modified by plain sodium silicate (Na4SiO4). There is a linear relationship between the degree of grafting and the content of Na4SiO4. Fourier transform infrared spectroscopy is used to characterize changes of the membrane's microstructures after grafting and sulfonation. The morphology of the membrane's microstructures after grafting and sulfonation is studied by scanning electrolytic microscope (SEM). The effect of plain sodium silicate (Na4SiO4) concentration and relative humidity on the conductivity of the electrolyte was investigated by the impedance at room temperature. The results show that the styrene has been grafted into PVDF. The conductivity of PVDF-g-PSSA electrolyte doped 10% plain sodium silicate (Na4SiO4) is 0.016 S/cm at room temperature. The conductivity of the electrolyte changes slightly at a relative humidity range of 20%-70%. The weightlessness of PVDF-g-PSSA electrolyte heated to 40°C was less than 2%, which indicated that water capacity was good.

Fabrication and Characterization of Ferroelectric Polymer/TiO2/Al-doped ZnO Structures

2008 ◽  
Vol 1071 ◽  
Author(s):  
Koji Aizawa
Keyword(s):  
Leakage Current ◽  
Vinylidene Fluoride ◽  
Ferroelectric Properties ◽  
Hysteresis Loops ◽  
Tio2 Films ◽  
Gate Leakage Current ◽  
Poly Vinylidene Fluoride ◽  
Doped Zno ◽  
Fabrication And Characterization

AbstractCharacterization of 700-nm-thick poly(vinylidene fluoride/trifluoroethylene) [P(VDF/TrFE)]/TiO2/Al-doped ZnO (AZO) structures on a glass substrate were investigated. In this study, the sputtered TiO2 films as insulator were used for the reduction of leakage current. The leakage current density of the fabricated Pt/P(VDF/TrFE)/AZO and Pt/P(VDF/TrFE)/170-nm-thick TiO2/AZO structures were approximately 8.7 and 3.9 nA/cm2 at the applied voltage of 10 V, respectively. In the polarization vs. voltage characteristics, the fabricated Pt/P(VDF/TrFE)/TiO2/AZO structures showed hysteresis loops caused by ferroelectric polarization. The remnant polarization (2Pr) and coercive voltage (2Vc) measured from a saturated hysteresis loop at the frequency of 50 Hz were approximately 12 μC/cm2 and 105 V, respectively. These results suggest that the insertion of TiO2 film is available for reducing the gate leakage current without changing the ferroelectric properties.

Fabrication and Characterization of Polyvinylidene Fluoride Microfilms for Microfluidic Applications

2016 ◽  
Vol 15 (05n06) ◽  
pp. 1660013
Author(s):  
Yammani Venkat Subba Rao ◽  
Aravinda Narayanan Raghavan ◽  
Meenakshi Viswanathan
Keyword(s):  
Spin Coating ◽  
Polyvinylidene Fluoride ◽  
Vinylidene Fluoride ◽  
Microstructural Properties ◽  
Average Roughness ◽  
Microfluidic Mixer ◽  
Poly Vinylidene Fluoride ◽  
Fabrication And Characterization ◽  
Microfluidic Mixers

The ability to create patterns of piezo responsive material on smooth substrate is an important method to develop efficient microfluidic mixers. This paper reports the fabrication of Poly vinylidene fluoride microfilms using spin-coating on smooth glass surface. The suitable crystalline phases, surface morphology and microstructural properties of the PVDF films have been investigated. We found that films of average thickness 10[Formula: see text][Formula: see text]m, had average roughness of 0.13[Formula: see text][Formula: see text]m. These PVDF films are useful in microfluidic mixer applications.

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