Enhanced dielectric, ferroelectric, energy storage and mechanical energy harvesting performance of ZnO-PVDF composites induced by MWCNT as an additive third phase

Soft Matter ◽  
2021 ◽  
Author(s):  
Shewli Pratihar ◽  
Aniket Patra ◽  
Abhishek Sasmal ◽  
Samar Kumar Medda ◽  
Shrabanee Sen
Keyword(s):  
Carbon Nanotubes ◽  
Energy Storage ◽  
Energy Harvesting ◽  
Vinylidene Fluoride ◽  
Mechanical Energy ◽  
Third Phase ◽  
Poly Vinylidene Fluoride ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The present work highlights an attempt of fabricating a nanocomposite by addition of multi-walled carbon nanotubes (MWCNT) as third phase into flexible ZnO-Poly(vinylidene fluoride) (ZnO-PVDF) composites. MWCNT played very important...

The effect of casting solution composition on surface structure and performance of poly(vinylidene fluoride)/multi-walled carbon nanotubes (PVDF/MWCNTs) hybrid membranes prepared via vapor induced phase separation

2017 ◽  
Vol 37 (4) ◽  
pp. 373-379
Author(s):  
Nana Li ◽  
Zhe Chang ◽  
Xiuzhen Zhao ◽  
Changfa Xiao
Keyword(s):  
Carbon Nanotubes ◽  
Phase Separation ◽  
Vinylidene Fluoride ◽  
Membrane Surface ◽  
Hybrid Membranes ◽  
Solution Composition ◽  
Casting Solution ◽  
Poly Vinylidene Fluoride ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Abstract In this work, the poly(vinylidene fluoride)/multi-walled carbon nanotubes (PVDF/MWCNTs) hybrid membranes were obtained through vapor induced phase separation (VIPS). In addition, the effects of solution composition on crystal behavior, elemental composite, morphology and hydrophilicity of membranes surface and the viscosity of casting solution were analyzed. The results of field emission scanning electron microscopy and X-ray photoelectron spectroscopy showed that the rough porous surface could be built in all hybrid membranes due to the slower double diffusion mechanism of the VIPS process, which also provided enough time for MWCNTs to move to the surface and be enriched there, to ensure the lowest surface free energy. Furthermore, other analysis displayed that both adding tiny amounts of MWCNTs and a low concentration of PVDF were favorable to the growth and aggregation of PVDF, which were put down to the adverse effect of hydrophobic MWCNTs on the thermodynamic compatibility of polar casting solution, the less nucleation points and the good fluidity with lower concentration of polymer. Then, the diameter of PVDF spherical particles and the membrane surface roughness increased, whereas the hydrophilicity of membrane surface declined effectively.

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