scholarly journals Ice-templated poly(vinylidene fluoride) ferroelectrets

2019 ◽  
Author(s):  
Chris Bowen
Keyword(s):  
Energy Harvesting ◽  
Vinylidene Fluoride ◽  
Cost Effective ◽  
Vibration Energy Harvesting ◽  
Poly Vinylidene Fluoride ◽  
Corona Poling ◽  
Range Alignment ◽  
Directional Freezing ◽  
Mechanical Stretching ◽  
Environmentally Friendly Approach

Ferroelectrets are piezoelectrically-active polymer foams that can convert externally applied loads into electric charge for sensor or energy harvesting applications. Existing processing routes used to create pores of the desired geometry and degree of alignment appropriate for ferroelectrets are based on complex mechanical stretching and chemical dissolution steps. In this work, we present the first demonstration of the use of freeze casting as a cost effective and environmentally friendly approach to produce polymeric ferroelectrets. The pore morphology, phase analysis, relative permittivity and direct piezoelectric charge coefficient (d33) of porous poly(vinylidene fluoride) (PVDF) based ferroelectrets with porosity volume fractions ranging from 24% to 78% were analysed. The long-range alignment of pore channels produced during directional freezing is shown to be beneficial in forming a highly polarised structure and high d33 ∼ 264 pC N−1 after breakdown of air within the pore channels during corona poling. This new approach opens a way to create tailored pore structures and voids in ferroelectret materials for transducer applications related to sensors and vibration energy harvesting.

scholarly journals Retraction: A bio-based piezoelectric nanogenerator for mechanical energy harvesting using nanohybrid of poly(vinylidene fluoride)

2021 ◽  
Author(s):  
Anna Rulka
Keyword(s):  
Energy Harvesting ◽  
Vinylidene Fluoride ◽  
Mechanical Energy ◽  
Poly Vinylidene Fluoride

Retraction for ‘A bio-based piezoelectric nanogenerator for mechanical energy harvesting using nanohybrid of poly(vinylidene fluoride)’ by Pralay Maiti et al., Nanoscale Adv., 2019, 1, 3200–3211, DOI: 10.1039/C9NA00214F.

Flexible Fibrous Piezo-Electric Sensor on Printed Silver Electrode

2014 ◽  
Vol 1685 ◽  
Author(s):  
Ho Yeon Son ◽  
Yoon Sung Nam ◽  
Woo Soo Kim
Keyword(s):  
Vinylidene Fluoride ◽  
Silver Nanowires ◽  
High Sensitivity ◽  
Cost Effective ◽  
Piezoelectric Sensor ◽  
Piezoelectric Sensors ◽  
Mechanical Stimuli ◽  
Aligned Arrays ◽  
Poly Vinylidene Fluoride ◽  
Facile Fabrication

ABSTRACTHere we introduce a facile method to fabricate a flexible piezoelectric sensor using one-dimensional (1-D) piezoelectric poly(vinylidene fluoride) (PVDF) nanofibers directly produced onto flexible printed electrodes by electro-spinning without an additional poling process. The flexible silver electrodes are fabricated on polyethylene terephthalate (PET) using silver nanowires by easy and cost-effective spraying deposition. The electrospun PVDF nanofibers have uniaxially aligned arrays on the electrodes by using a rotating collector. The fabricated PVDF piezoelectric sensors demonstrate the piezoelectric responses with repeated mechanical stimuli with good flexibility and high sensitivity. We expect that the facile fabrication of PVDF piezoelectric sensors on flexible printed electrodes can be usefully exploited to integrate the piezoelectric sensors into flexible and stretchable functional electronic devices.

scholarly journals Development of a superhydrophobic electrospun poly(vinylidene fluoride) web via plasma etching and water immersion for energy harvesting applications

RSC Advances ◽  
2018 ◽  
Vol 8 (50) ◽  
pp. 28825-28835 ◽  
Author(s):  
Beom-Jun Ju ◽  
Ji-Hyun Oh ◽  
Changsang Yun ◽  
Chung Hee Park
Keyword(s):  
Energy Harvesting ◽  
Plasma Etching ◽  
Vinylidene Fluoride ◽  
Water Immersion ◽  
Smart Textiles ◽  
Simple Process ◽  
Poly Vinylidene Fluoride

Flexible and breathable electrospun PVDF web with both piezoelectricity and superhydrophobicity for smart textiles was fabricated by a simple process, plasma etching and water immersion, without any additional coatings.

Role of Cationic Oxidation States to Enhance the Electroactive β-Phase of Poly(vinylidene Fluoride) and its Energy Harvesting Performance

2018 ◽  
Vol 5 (22) ◽  
pp. 3533-3539 ◽  
Author(s):  
Kausalya Ganesan ◽  
Nagamalleswara R. Alluri ◽  
Nirmal Prashanth M. J. Raj ◽  
A. Chandrasekhar ◽  
S.-J. Kim
Keyword(s):  
Energy Harvesting ◽  
Vinylidene Fluoride ◽  
Oxidation States ◽  
Β Phase ◽  
Poly Vinylidene Fluoride

Design and Synthesis of a Superhydrophobic PVDF-Based Composite

2015 ◽  
Vol 138 (2) ◽  
Author(s):  
Hyunho Choi ◽  
Kyungjun Lee ◽  
John Reeks ◽  
Hong Liang
Keyword(s):  
Phase Separation ◽  
Chemical Treatment ◽  
Vinylidene Fluoride ◽  
Cost Effective ◽  
Simple Approach ◽  
Material Surface ◽  
Engineering Applications ◽  
Design And Synthesis ◽  
Material Surfaces ◽  
Poly Vinylidene Fluoride

The ability to design, control, and synthesize a material surface with superhydrophobicity is of great interests in many engineering applications. Here, we report a cost-effective process to fabricate poly(vinylidene fluoride) (PVDF)/zirconium(IV) oxide (ZrO2) composites with superhydrophobicity. This is achieved by combining an antisolvent that induces phase separation, i.e., the precipitation of PVDF from the solution through a spray-on method on various liquids. The material surfaces possess wrinkled micron-sized beads which displayed superhydrophobicity in water without any chemical treatment. The process developed in this research presented a fast and simple approach in making hydrophobic surfaces.

A large piezoelectric response in highly-aligned electrospun poly(vinylidene fluoride/trifluoroethylene) nanofiber webs for wearable energy harvesting

2020 ◽  
Vol 32 (1) ◽  
pp. 015401 ◽  
Author(s):  
Mohammad A Barique ◽  
Yoichiro Neo ◽  
Masaji Noyori ◽  
Lia Aprila ◽  
Masaya Asai ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Vinylidene Fluoride ◽  
Piezoelectric Response ◽  
Poly Vinylidene Fluoride
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