Cargando…
Phase Inversion in PVDF Films with Enhanced Piezoresponse Through Spin-Coating and Quenching
In the present work, poly(vinylidene fluoride) (PVDF) films were produced by spin-coating, and applying different conditions of quenching, in order to investigate the dominant mechanism of the β-phase formation. The influence of the polymer/solvent mass ratio of the solution, the rotational speed of...
Autores principales: | , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6680798/ https://www.ncbi.nlm.nih.gov/pubmed/31261759 http://dx.doi.org/10.3390/polym11071096 |
_version_ | 1783441583868215296 |
---|---|
author | Fortunato, Marco Cavallini, Domenico De Bellis, Giovanni Marra, Fabrizio Tamburrano, Alessio Sarto, Francesca Sarto, Maria Sabrina |
author_facet | Fortunato, Marco Cavallini, Domenico De Bellis, Giovanni Marra, Fabrizio Tamburrano, Alessio Sarto, Francesca Sarto, Maria Sabrina |
author_sort | Fortunato, Marco |
collection | PubMed |
description | In the present work, poly(vinylidene fluoride) (PVDF) films were produced by spin-coating, and applying different conditions of quenching, in order to investigate the dominant mechanism of the β-phase formation. The influence of the polymer/solvent mass ratio of the solution, the rotational speed of the spin-coater and the crystallization temperature of the film on both the β-phase content and the piezoelectric coefficient (d(33)) were investigated. This study demonstrates that the highest values of d(33) are obtained when thinner films, produced with a lower concentration of polymer in the solvent (i.e., 20 wt.%), go through quenching in water, at room temperature. Whereas, in the case of higher polymer concentration (i.e., 30 wt.%), the best value of d(33) (~30 pm/V) was obtained through quenching in liquid nitrogen, at the temperature of 77 K. We believe that in the former case, phase inversion is mainly originated by electrostatic interaction of PVDF with the polar molecules of water, due to the low viscosity of the polymer solution. On the contrary, in the latter case, due to higher viscosity of the solution, mechanical stretching induced on the polymer during spin-coating deposition is the main factor inducing self-alignment of the β-phase. These findings open up a new way to realize highly efficient devices for energy harvesting and wearable sensors. |
format | Online Article Text |
id | pubmed-6680798 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-66807982019-08-09 Phase Inversion in PVDF Films with Enhanced Piezoresponse Through Spin-Coating and Quenching Fortunato, Marco Cavallini, Domenico De Bellis, Giovanni Marra, Fabrizio Tamburrano, Alessio Sarto, Francesca Sarto, Maria Sabrina Polymers (Basel) Article In the present work, poly(vinylidene fluoride) (PVDF) films were produced by spin-coating, and applying different conditions of quenching, in order to investigate the dominant mechanism of the β-phase formation. The influence of the polymer/solvent mass ratio of the solution, the rotational speed of the spin-coater and the crystallization temperature of the film on both the β-phase content and the piezoelectric coefficient (d(33)) were investigated. This study demonstrates that the highest values of d(33) are obtained when thinner films, produced with a lower concentration of polymer in the solvent (i.e., 20 wt.%), go through quenching in water, at room temperature. Whereas, in the case of higher polymer concentration (i.e., 30 wt.%), the best value of d(33) (~30 pm/V) was obtained through quenching in liquid nitrogen, at the temperature of 77 K. We believe that in the former case, phase inversion is mainly originated by electrostatic interaction of PVDF with the polar molecules of water, due to the low viscosity of the polymer solution. On the contrary, in the latter case, due to higher viscosity of the solution, mechanical stretching induced on the polymer during spin-coating deposition is the main factor inducing self-alignment of the β-phase. These findings open up a new way to realize highly efficient devices for energy harvesting and wearable sensors. MDPI 2019-06-28 /pmc/articles/PMC6680798/ /pubmed/31261759 http://dx.doi.org/10.3390/polym11071096 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Fortunato, Marco Cavallini, Domenico De Bellis, Giovanni Marra, Fabrizio Tamburrano, Alessio Sarto, Francesca Sarto, Maria Sabrina Phase Inversion in PVDF Films with Enhanced Piezoresponse Through Spin-Coating and Quenching |
title | Phase Inversion in PVDF Films with Enhanced Piezoresponse Through Spin-Coating and Quenching |
title_full | Phase Inversion in PVDF Films with Enhanced Piezoresponse Through Spin-Coating and Quenching |
title_fullStr | Phase Inversion in PVDF Films with Enhanced Piezoresponse Through Spin-Coating and Quenching |
title_full_unstemmed | Phase Inversion in PVDF Films with Enhanced Piezoresponse Through Spin-Coating and Quenching |
title_short | Phase Inversion in PVDF Films with Enhanced Piezoresponse Through Spin-Coating and Quenching |
title_sort | phase inversion in pvdf films with enhanced piezoresponse through spin-coating and quenching |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6680798/ https://www.ncbi.nlm.nih.gov/pubmed/31261759 http://dx.doi.org/10.3390/polym11071096 |
work_keys_str_mv | AT fortunatomarco phaseinversioninpvdffilmswithenhancedpiezoresponsethroughspincoatingandquenching AT cavallinidomenico phaseinversioninpvdffilmswithenhancedpiezoresponsethroughspincoatingandquenching AT debellisgiovanni phaseinversioninpvdffilmswithenhancedpiezoresponsethroughspincoatingandquenching AT marrafabrizio phaseinversioninpvdffilmswithenhancedpiezoresponsethroughspincoatingandquenching AT tamburranoalessio phaseinversioninpvdffilmswithenhancedpiezoresponsethroughspincoatingandquenching AT sartofrancesca phaseinversioninpvdffilmswithenhancedpiezoresponsethroughspincoatingandquenching AT sartomariasabrina phaseinversioninpvdffilmswithenhancedpiezoresponsethroughspincoatingandquenching |