Phase transformation of poly (vinylidene fluoride)/TiO2 nanocomposite film prepared by microwave-assisted solvent evaporation: An experimental and molecular dynamics study

2020 ◽  
Vol 199 ◽  
pp. 108375
Author(s):  
Hyunsoo Hong ◽  
Seung A Song ◽  
Seong Su Kim
Keyword(s):  
Molecular Dynamics ◽  
Phase Transformation ◽  
Nanocomposite Film ◽  
Vinylidene Fluoride ◽  
Solvent Evaporation ◽  
Microwave Assisted ◽  
Poly Vinylidene Fluoride

scholarly journals Evaporation-Induced Crystal Nucleation and Morphology of Dried Poly(Vinylidene Fluoride) Droplets

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1442
Author(s):  
Yongri Liang ◽  
Susu Wang
Keyword(s):  
Droplet Size ◽  
Evaporation Rate ◽  
Vinylidene Fluoride ◽  
Grazing Incidence ◽  
Solvent Evaporation ◽  
Crystal Nucleation ◽  
Coffee Ring ◽  
Poly Vinylidene Fluoride ◽  
Coffee Ring Effect ◽  
Ring Effect

The evaporation of a polymer solution droplet is important in solution-based polymer film fabrications, such as inkjet printing, spray coatings, and droplet casting, etc. In this work, we investigated the effect of droplet size, solvent evaporation rate, and concentration on the “coffee-ring” effect, crystal nucleation, polymorphism, and morphology of dried poly (vinylidene fluoride) (PVDF) solution droplets with the atomic force microscopy (AFM) and two-dimensional grazing incidence wide angle X-ray scattering (2D GIWAXS) method. We found that the crystal structure, morphology and crystal distribution in the center and edge regions of dried PVDF droplets were different due to the “coffee-ring” effect. The “coffee-ring” effect of dried PVDF droplets was mainly composited of accumulated crystals at the edge region of a droplet, which was mainly made by the crystallization of migrated chains. The interplay between the migration of chains and the crystallization and solidification of PVDF droplets significantly influenced the formation of the “coffee-ring”. In addition, our results showed that the decrease in droplet size and the controlling solvent evaporation rate were effective ways to improve the electroactive crystalline phases (β and γ-phases) nucleation and decrease the crystal size.

Molecular investigation of oil–water separation using PVDF polymer by molecular dynamic simulation

RSC Advances ◽  
2016 ◽  
Vol 6 (78) ◽  
pp. 74124-74134 ◽  
Author(s):  
Mehdi Darvishi ◽  
Masumeh Foroutan
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Vinylidene Fluoride ◽  
Dynamics Simulation ◽  
Water Separation ◽  
Molecular Investigation ◽  
Poly Vinylidene Fluoride ◽  
Adsorption Of Water ◽  
Oil Water Separation ◽  
Oil Water

In this study, adsorption of water nanodroplets, oil nanodroplets and oil–water mixtures on a poly vinylidene fluoride (PVDF) surface is investigated using molecular dynamics simulation and a mechanism for adsorption of the droplets is proposed.

Analysis of the crystalline phase transformation of poly(vinylidene fluoride)

1985 ◽  
Vol 18 (12) ◽  
pp. 2583-2587 ◽  
Author(s):  
S. L. Hsu ◽  
F. J. Lu ◽  
D. A. Waldman ◽  
M. Muthukumar
Keyword(s):  
Phase Transformation ◽  
Crystalline Phase ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride

Crystal Structure and Ferroelectric Properties of Poly(vinylidene fluoride)-Carbon nano tube Nanocomposite Film

2008 ◽  
Vol 491 (1) ◽  
pp. 247-254 ◽  
Author(s):  
Ji Seok Lee ◽  
Gwang Ho Kim ◽  
Woo Nyon Kim ◽  
Kyung Hwan Oh ◽  
Hyeong Tae Kim ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Nanocomposite Film ◽  
Vinylidene Fluoride ◽  
Ferroelectric Properties ◽  
Poly Vinylidene Fluoride ◽  
Carbon Nano Tube

Molecular Dynamics Study on Wettability of Poly(vinylidene fluoride) Crystalline and Amorphous Surfaces

Langmuir ◽  
2018 ◽  
Vol 34 (40) ◽  
pp. 12214-12223 ◽  
Author(s):  
Masahiro Kitabata ◽  
Tseden Taddese ◽  
Susumu Okazaki
Keyword(s):  
Molecular Dynamics ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride
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