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TitleTailoring porous structure of ferroelectric poly(vinylidene fluoride-trifluoroethylene) by controlling solvent/polymer ratio and solvent evaporation rate
Author(s)California, A.
Cardoso, V. F.
Costa, Carlos M.
Sencadas, Vítor João Gomes Silva
Botelho, Gabriela
Gómez Ribelles, J. L.
Lanceros-Méndez, S.
KeywordsElectroactive membranes
Porous membranes
Solvent evaporation
Phase diagram
Issue date2011
JournalEuropean Polymer Journal
Abstract(s)Ferroelectric macroporous poly(vinylidene fluoride-trifuoroethylene) membranes have been produced by isothermal crystallization from the solution at different temperatures starting from different diluted solutions of the co-polymer in dimethylformamide. In this way pore architecture, consisting in interconnected spherical pores can be obtained. The mechanism and kinetics of solvent evaporation was investigated and related to the evolution of the polymer microstructure. The mechanism underlying the pattern formation has been discussed on the light of the Flory-Huggins (FH) lattice teory, grain boundary effects and the Cahn-Hilliard equation for mass conservation systems. It was also observed that the temperature or initial concentration of the crystallization process does not affect the phase, ferroelectric transition temperature or the melting temperature of the polymer.
Publisher version
AccessOpen access
Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)

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