Poly(vinylidene Fluoride) Sandwiched Calotropis Gigantea Fiber: A Reusable Oil Sorbent with High-efficiency

2020 ◽  
pp. 1-10
Author(s):  
Weilong Xiao ◽  
Bihui Niu ◽  
Changduo Sun ◽  
Min Yu ◽  
Ningfen Wang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Vinylidene Fluoride ◽  
Calotropis Gigantea ◽  
Oil Sorbent ◽  
Poly Vinylidene Fluoride

Piezoelectric β-polymorph formation of new textiles by surface modification with coating process based on interfacial interaction on the conformational variation of poly (vinylidene fluoride) (PVDF) chains

2020 ◽  
Vol 91 (3) ◽  
pp. 31301
Author(s):  
Nabil Chakhchaoui ◽  
Rida Farhan ◽  
Meriem Boutaldat ◽  
Marwane Rouway ◽  
Adil Eddiai ◽  
...  
Keyword(s):  
High Efficiency ◽  
Vinylidene Fluoride ◽  
Research Work ◽  
Research Area ◽  
Interfacial Interaction ◽  
Tetraethyl Orthosilicate ◽  
Poly Vinylidene Fluoride ◽  
Carbon Nanofillers ◽  
The Impact ◽  
Advanced Applications

Novel textiles have received a lot of attention from researchers in the last decade due to some of their unique features. The introduction of intelligent materials into textile structures offers an opportunity to develop multifunctional textiles, such as sensing, reacting, conducting electricity and performing energy conversion operations. In this research work nanocomposite-based highly piezoelectric and electroactive β-phase new textile has been developed using the pad-dry-cure method. The deposition of poly (vinylidene fluoride) (PVDF) − carbon nanofillers (CNF) − tetraethyl orthosilicate (TEOS), Si(OCH2CH3)4 was acquired on a treated textile substrate using coating technique followed by evaporation to transform the passive (non-functional) textile into a dynamic textile with an enhanced piezoelectric β-phase. The aim of the study is the investigation of the impact the coating of textile via piezoelectric nanocomposites based PVDF-CNF (by optimizing piezoelectric crystalline phase). The chemical composition of CT/PVDF-CNC-TEOS textile was detected by qualitative elemental analysis (SEM/EDX). The added of 0.5% of CNF during the process provides material textiles with a piezoelectric β-phase of up to 50% has been measured by FTIR experiments. These results indicated that CNF has high efficiency in transforming the phase α introduced in the unloaded PVDF, to the β-phase in the case of nanocomposites. Consequently, this fabricated new textile exhibits glorious piezoelectric β-phase even with relatively low coating content of PVDF-CNF-TEOS. The study demonstrates that the pad-dry-cure method can potentially be used for the development of piezoelectric nanocomposite-coated wearable new textiles for sensors and energy harvesting applications. We believe that our study may inspire the research area for future advanced applications.

Poly(vinylidene fluoride) hollow fiber membrane for high-efficiency separation of dyes-salts

2019 ◽  
Vol 578 ◽  
pp. 43-52 ◽  
Author(s):  
Huiqiang Liu ◽  
Yingbo Chen ◽  
Kai Zhang ◽  
Chuanfeng Wang ◽  
Xiaoyu Hu ◽  
...  
Keyword(s):  
Hollow Fiber ◽  
High Efficiency ◽  
Vinylidene Fluoride ◽  
Hollow Fiber Membrane ◽  
Fiber Membrane ◽  
Poly Vinylidene Fluoride

scholarly journals Ultrahigh β-phase content poly(vinylidene fluoride) with relaxor-like ferroelectricity for high energy density capacitors

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Nan Meng ◽  
Xintong Ren ◽  
Giovanni Santagiuliana ◽  
Leonardo Ventura ◽  
Han Zhang ◽  
...  
Keyword(s):  
Energy Density ◽  
High Efficiency ◽  
Vinylidene Fluoride ◽  
Dielectric Materials ◽  
High Energy ◽  
High Energy Density ◽  
Polar Phase ◽  
Phase Content ◽  
Β Phase ◽  
Poly Vinylidene Fluoride

Abstract Poly(vinylidene fluoride)-based dielectric materials are prospective candidates for high power density electric storage applications because of their ferroelectric nature, high dielectric breakdown strength and superior processability. However, obtaining a polar phase with relaxor-like behavior in poly(vinylidene fluoride), as required for high energy storage density, is a major challenge. To date, this has been achieved using complex and expensive synthesis of copolymers and terpolymers or via irradiation with high-energy electron-beam or γ-ray radiations. Herein, a facile process of pressing-and-folding is proposed to produce β-poly(vinylidene fluoride) (β-phase content: ~98%) with relaxor-like behavior observed in poly(vinylidene fluoride) with high molecular weight > 534 kg mol−1, without the need of any hazardous gases, solvents, electrical or chemical treatments. An ultra-high energy density (35 J cm−3) with a high efficiency (74%) is achieved in a pressed-and-folded poly(vinylidene fluoride) (670-700 kg mol−1), which is higher than that of other reported polymer-based dielectric capacitors to the best of our knowledge.

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