Zinc oxide nanorod as effective reinforcing material for enhancing β phase crystal in poly(vinylidene fluoride) filaments

2020 ◽  
Vol 54 (25) ◽  
pp. 3833-3839
Author(s):  
Prasanta K Panda ◽  
Sachin R Tambe ◽  
Amol G Thite
Keyword(s):  
Zinc Oxide ◽  
Draw Ratio ◽  
Vinylidene Fluoride ◽  
Zinc Oxide Nanorods ◽  
Melt Compounding ◽  
Β Phase ◽  
Oxide Nanorods ◽  
Phase Crystal ◽  
Poly Vinylidene Fluoride ◽  
Crystal Content

The present work is an attempt to demonstrate that incorporation of small amount of zinc oxide nanorods enhances the β crystal percentage, which is essential for improvement in piezo-electric performance of the poly(vinylidene fluoride) (PVDF) fiber. The zinc oxide nanorods were synthesized with aspect ratio of 26 and uniformly dispersed in PVDF by melt compounding process. Those compounded polymers were melt spun and subsequently cold drawn to obtain composite filaments. The effect of nanostructure, loading amount, melt draw ratio, cold draw ratio, and drawing temperature was investigated. The incorporation of nanorods resulted in 14% increase in β phase crystal content compared to control PVDF filaments. The β phase crystal content has been analyzed using the wide-angle X ray diffraction and FTIR spectroscopy. This increase in β phase crystal content was 10% more compared to circular zinc oxide nanoparticle reinforced PVDF composite filament. There was no significant change in mechanical properties of the composite filaments compared to the control PVDF filament.

scholarly journals Enhancement of β-Phase Crystal Content of Poly(vinylidene fluoride) Nanofiber Web by Graphene and Electrospinning Parameters

2020 ◽  
Vol 38 (11) ◽  
pp. 1239-1247 ◽  
Author(s):  
Lu Jin ◽  
Yan Zheng ◽  
Ze-Kun Liu ◽  
Jia-Shen Li ◽  
Yang-Pei-Qi Yi ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Β Phase ◽  
Phase Crystal ◽  
Poly Vinylidene Fluoride ◽  
Nanofiber Web ◽  
Crystal Content

High Efficient and Continuous Triboelectric Power Harvesting based on Porous β-phase Poly (vinylidene fluoride) Aerogel

2021 ◽  
Author(s):  
Minmin Wang ◽  
Weiqun Liu ◽  
Xu Shi ◽  
Jinyang Pan ◽  
Bing Zhou ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
High Electron ◽  
Exchange Method ◽  
Power Harvesting ◽  
Β Phase ◽  
Output Performance ◽  
High Electron Affinity ◽  
High Efficient ◽  
Poly Vinylidene Fluoride ◽  
High Output

Non-additive β-phase porous poly (vinylidene fluoride) (PVDF) aerogel with high electron affinity is successfully prepared through simple solvent exchange method. The as-prepared additive-free PVDF aerogel shows high output performance used...

scholarly journals Comparative Study of PVDF Sheets and Their Sensitivity to Mechanical Vibrations: The Role of Dimensions, Molecular Weight, Stretching and Poling

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1637
Author(s):  
Miroslav Mrlík ◽  
Josef Osička ◽  
Martin Cvek ◽  
Markéta Ilčíková ◽  
Peter Srnec ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Comparative Study ◽  
Vinylidene Fluoride ◽  
Initial Thickness ◽  
Complementary Method ◽  
Β Phase ◽  
Vibration Sensing ◽  
Poly Vinylidene Fluoride ◽  
Processing Techniques ◽  
The Comparative Study

This paper is focused on the comparative study of the vibration sensing capabilities of poly(vinylidene fluoride) (PVDF) sheets. The main parameters such as molecular weight, initial sample thickness, stretching and poling were systematically applied, and their impact on sensing behavior was examined. The mechanical properties of prepared sheets were investigated via tensile testing on the samples with various initial thicknesses. The transformation of the α-phase to the electro-active β-phase was analyzed using FTIR after applying stretching and poling procedures as crucial post-processing techniques. As a complementary method, the XRD was applied, and it confirmed the crystallinity data resulting from the FTIR analysis. The highest degree of phase transformation was found in the PVDF sheet with a moderate molecular weight (Mw of 275 kDa) after being subjected to the highest axial elongation (500%); in this case, the β-phase content reached approximately 90%. Finally, the vibration sensing capability was systematically determined, and all the mentioned processing/molecular parameters were taken into consideration. The whole range of the elongations (from 50 to 500%) applied on the PVDF sheets with an Mw of 180 and 275 kDa and an initial thickness of 0.5 mm appeared to be sufficient for vibration sensing purposes, showing a d33 piezoelectric charge coefficient from 7 pC N−1 to 9.9 pC N−1. In terms of the d33, the PVDF sheets were suitable regardless of their Mw only after applying the elongation of 500%. Among all the investigated samples, those with an initial thickness of 1.0 mm did not seem to be suitable for vibration sensing purposes.

scholarly journals Studies on the electrostatic effects of stretched PVDF films and nanofibers

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Yixuan Lin ◽  
Yuqiong Zhang ◽  
Fan Zhang ◽  
Meining Zhang ◽  
Dalong Li ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Polarized Light ◽  
Transition Process ◽  
Open Circuit ◽  
Wearable Electronics ◽  
Energy Harvesters ◽  
Β Phase ◽  
Poly Vinylidene Fluoride ◽  
Piezoelectric Effects ◽  
Energy Harvesting Devices

AbstractThe electroactive β-phase in Poly (vinylidene fluoride, PVDF) is the most desirable conformation due to its highest pyro- and piezoelectric properties, which make it feasible to be used as flexible sensors, wearable electronics, and energy harvesters etc. In this study, we successfully developed a method to obtain high-content β-phase PVDF films and nanofiber meshes by mechanical stretching and electric spinning. The phase transition process and pyro- and piezoelectric effects of stretched films and nanofiber meshes were characterized by monitoring the polarized light microscopy (PLM) images, outputting currents and open-circuit voltages respectively, which were proved to be closely related to stretching ratio (λ) and concentrations. This study could expand a new route for the easy fabrication and wide application of PVDF films or fibers in wearable electronics, sensors, and energy harvesting devices.

Optimisation of zinc oxide nanorods for use in dye sensitised solar cells

2011 ◽  
Vol 15 (6) ◽  
pp. 401-405 ◽  
Author(s):  
S K Lim ◽  
H Q Le ◽  
G K L Goh ◽  
K K Lin ◽  
S B Dolmanan
Keyword(s):  
Zinc Oxide ◽  
Solar Cells ◽  
Zinc Oxide Nanorods ◽  
Oxide Nanorods

scholarly journals Cellulose Nanofiber-Based Nanocomposite Films Reinforced with Zinc Oxide Nanorods and Grapefruit Seed Extract

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 877 ◽  
Author(s):  
Swarup Roy ◽  
Hyun Chan Kim ◽  
Pooja S. Panicker ◽  
Jong-Whan Rhim ◽  
Jaehwan Kim
Keyword(s):  
Thermal Stability ◽  
Zinc Oxide ◽  
Seed Extract ◽  
Cellulose Nanofiber ◽  
Nanocomposite Films ◽  
Zinc Oxide Nanorods ◽  
Precipitation Method ◽  
Active Food Packaging ◽  
Oxide Nanorods ◽  
Grapefruit Seed Extract

Here, we report the fabrication and characterization of cellulose nanofiber (CNF)-based nanocomposite films reinforced with zinc oxide nanorods (ZnOs) and grapefruit seed extract (GSE). The CNF is isolated via a combination of chemical and physical methods, and the ZnO is prepared using a simple precipitation method. The ZnO and GSE are used as functional nanofillers to produce a CNF/ZnO/GSE film. Physical (morphology, chemical interactions, optical, mechanical, thermal stability, etc.) and functional (antimicrobial and antioxidant activities) film properties are tested. The incorporation of ZnO and GSE does not impact the crystalline structure, mechanical properties, or thermal stability of the CNF film. Nanocomposite films are highly transparent with improved ultraviolet blocking and vapor barrier properties. Moreover, the films exhibit effective antimicrobial and antioxidant actions. CNF/ZnO/GSE nanocomposite films with better quality and superior functional properties have many possibilities for active food packaging use.

Effects of Li and Cu dopants on structural properties of zinc oxide nanorods

2015 ◽  
Vol 77 ◽  
pp. 101-107 ◽  
Author(s):  
Kyung Ho Kim ◽  
Zhuguang Jin ◽  
Yoshio Abe ◽  
Midori Kawamura
Keyword(s):  
Zinc Oxide ◽  
Structural Properties ◽  
Zinc Oxide Nanorods ◽  
Oxide Nanorods

Development of Resistance-Based pH Sensor Using Zinc Oxide Nanorods

2016 ◽  
Vol 16 (6) ◽  
pp. 6102-6106 ◽  
Author(s):  
Vernalyn C Copa ◽  
Anthony R Tuico ◽  
Jamie P Mendoza ◽  
John Paul R Ferrolino ◽  
Christopher Jude T Vergara ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Ph Sensor ◽  
Zinc Oxide Nanorods ◽  
Development Of Resistance ◽  
Oxide Nanorods
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