Effect of electrospinning parameters and polymer concentrations on mechanical-to-electrical energy conversion of randomly-oriented electrospun poly(vinylidene fluoride) nanofiber mats

RSC Advances ◽  
2015 ◽  
Vol 5 (19) ◽  
pp. 14345-14350 ◽  
Author(s):  
Hao Shao ◽  
Jian Fang ◽  
Hongxia Wang ◽  
Tong Lin
Keyword(s):  
Energy Conversion ◽  
Vinylidene Fluoride ◽  
Electric Energy ◽  
Electrical Energy ◽  
Crystal Phase ◽  
Phase Content ◽  
Fiber Morphology ◽  
Poly Vinylidene Fluoride ◽  
Nanofiber Mats

Electrospun PVDF nanofibers with uniform fiber-morphology, smaller diameter and higher β crystal phase content show higher mechanical-to-electric energy conversion ability.

Nanoparticle Size and Concentration Dependence of the Electroactive Phase Content and Electrical and Optical Properties of Ag/Poly(vinylidene fluoride) Composites

ChemPhysChem ◽  
2013 ◽  
Vol 14 (9) ◽  
pp. 1926-1933 ◽  
Author(s):  
Ana Catarina Lopes ◽  
Sonia A. C. Carabineiro ◽  
Manuel Fernando R. Pereira ◽  
Gabriela Botelho ◽  
Senentxu Lanceros-Mendez
Keyword(s):  
Optical Properties ◽  
Concentration Dependence ◽  
Vinylidene Fluoride ◽  
Nanoparticle Size ◽  
Phase Content ◽  
Electrical And Optical Properties ◽  
Poly Vinylidene Fluoride

scholarly journals Fabrication of Poly(Vinylidene Fluoride)/Graphene Nano-Composite Micro-Parts with Increased β-Phase and Enhanced Toughness via Micro-Injection Molding

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3292
Author(s):  
Wu Guo ◽  
Zhaogang Liu ◽  
Yan Zhu ◽  
Li Li
Keyword(s):  
Injection Molding ◽  
Vinylidene Fluoride ◽  
Structure Evolution ◽  
Phase Content ◽  
Micro Injection Molding ◽  
Nano Composite ◽  
Injection Speed ◽  
Β Phase ◽  
Poly Vinylidene Fluoride ◽  
Micro Parts

Based on poly(vinylidene fluoride)/graphene (PVDF/GP) nano-composite powder, with high β-phase content (>90%), prepared on our self-designed pan-mill mechanochemical reactor, the micro-injection molding of PVDF/GP composite was successfully realized and micro-parts with good replication and dimensional stability were achieved. The filling behaviors and the structure evolution of the composite during the extremely narrow channel of the micro-injection molding were systematically studied. In contrast to conventional injection molding, the extremely high injection speed and small cavity of micro-injection molding produced a high shear force and cooling rate, leading to the obvious “skin-core” structure of the micro-parts and the orientation of both PVDF and GP in the shear layer, thus, endowing the micro-parts with a higher melting point and crystallinity and also inducing the transformation of more α-phase PVDF to β-phase. At the injection speed of 500 mm/s, the β-phase PVDF in the micro-part was 78%, almost two times of that in the macro-part, which was beneficial to improve the dielectric properties. The micro-part had the higher tensile strength (57.6 MPa) and elongation at break (53.6%) than those of the macro-part, due to its increased crystallinity and β-phase content.

scholarly journals Fabrication of electroactive poly(vinylidene fluoride) through non-isothermal crystallization and supercritical CO2 processing

RSC Advances ◽  
2017 ◽  
Vol 7 (77) ◽  
pp. 48712-48722 ◽  
Author(s):  
Ji Eun Lee ◽  
Yanting Guo ◽  
Richard Eungkee Lee ◽  
Siu Ning Leung
Keyword(s):  
Isothermal Crystallization ◽  
Supercritical Co2 ◽  
Vinylidene Fluoride ◽  
Phase Content ◽  
Poly Vinylidene Fluoride ◽  
New Strategy

A new strategy using non-isothermal crystallization and supercritical CO2 processing is found to promote the electroactive phase content in PVDF.

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