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journal article·2010-12-30Open access

The Role of Solvent Evaporation in the Microstructure of Electroactive β-Poly(Vinylidene Fluoride) Membranes Obtained by Isothermal Crystallization

R. Magalhães, N. Durães, M. Silva, J. Silva, V. Sencadas, G. Botelho, J. L. Gómez Ribelles, S. Lanceros-Méndez

Soft Materials· Volume 9· Issue 1
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Source abstract

Abstract

Electroactiveβ-poly(vinylidene fluoride) (PVDF) membranes were obtained by isothermal crystallization from the solution. Different morphologies and microstructures were obtained by crystallizing at different temperatures. The mechanism and kinetics of solvent evaporation from the polymeric solution were investigated using isothermal thermogravimetric analysis. The kinetic parameters and the activation energy were also calculated. The solvent evaporation is ruled by two steps, related with a metastable– unstable–metastable transition in the solution phase diagram. Scanning electron microscopy revealed the porous structure and the variations of the morphology with the variation of the isothermal evaporation temperature. Finally, the infrared spectroscopy measurements confirm that the polymer crystallizes in the electroactiveβ-phase of PVDF.
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Research context

Polymers

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Green IT and Sustainability · Fuel Cells and Related Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

a Centro/Departamento de Física , Universidade do Minho , Braga, Portugal

b CeNTI—Centre for Nanotechnology and Smart Materials, Vila Nova de Famalicão , Portugal

c IPC-Institute for Polymers and Composites , University of Minho , Guimarães, Portugal

d Departamento de Química, Centro de Química , Universidade do Minho , Braga-Portugal

e Centro de Biomateriales e Ingeniería Tisular , Universidad Politécnica de Valencia , Valencia, Spain

f Regenerative Medicine Unit, Centro de Investigación Príncipe Felipe , Valencia, Spain

g CIBER en Bioingeniería, Biomateriales y Nanomedicina , Valencia, Spain

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