Membranas poliméricas íon seletivas aniônicas e catiônicas para uso em eletrodiálise
- Autores: Franciélli Müller
- Directores de la Tesis: Elaine Armelin (dir. tes.), Carlos Arthur Ferreira (dir. tes.)
- Lectura: En la Universitat Politècnica de Catalunya (UPC) ( España ) en 2013
- Idioma: portugués
- Tribunal Calificador de la Tesis: Jane Zoppas Ferreira (presid.), Francisco Estrany Coda (secret.), Frando Dani Rico Amado (voc.), Carlos Alemán Llausó (voc.), Marco Antônio Siqueira Rodrigues (voc.)
- Materias:
- Enlaces
- Tesis en acceso abierto en: TDX
- Resumen
The main objective of this Thesis is the development of anionic and cationic polymeric membranes for treatment of solution containing metallic ions using electrodialysis process. In this work were synthesized cationic membranes from crystal polystyrene (PS), high impact polystyrene (HIPS), poly(styrene-ethylene-butylene-) triblock copolymer (SEBS) and polyaniline (PAni) doped with camphorsulfonic acid (CSA). After sulfonation, blends of polymers were used to produce ion exchange membranes by solvent-casting and subsequent thermal treatment. The anionic membranes were synthesized from poly (vinyl alcohol) (PVA), with insertion of quaternary ammonium groups in the polymeric matrix and subsequent crosslinking with glutaraldehyde and maleic anhydride. Different membranes were synthesized in order to view and evaluate the combination of mechanical, chemical, electrochemical and ionic transport. The morphology and structure of the membranes were investigated by scanning electron microscopy, atomic force microscopy and infrared spectroscopy. The thermal transitions and stability of all the membranes were characterized using calorimetric techniques and compared with those of the individual polymers. The physical properties (i.e., ionic conductivity, ion exchange capacity, water absorption, dimensional stability, mechanical properties, etc.) showed that the performance of cationic membranes containing PS is generally better than membranes containing HIPS. The tests for determining of performance electrodialysis membranes in the transport of sodium, nickel, chromium, chloride and nitrate ions were performed in a three compartments laboratory cell. Selemion CMT® (cationic) and AMV (anionic) commercial membranes were used to compare the results of the extraction percentage of indicated ions. All the results derived from the present thesis have been accepted or have been sent for publication in international journals and also reported in some international congresses, as we point below: [1] 'Transport of Metallic Ions through Polyaniline-Containing Composite Membranes'. Carlos A. Ferreira, Jordi Casanova, Marco A. S. Rodrigues, Franciélli Müller, Elaine Armelin, Carlos Alemán. J. Chem. Eng. Sci. 2010, 55, 4801-4807. [2] 'Desenvolvimento de Membranas e Filmes Auto-Suportados a partir de Polianilina: Síntese, Caracterização e Aplicação'. Franciélli Müller, Franco D. R. Amado, Marco A. S. Rodrigues, Carlos A. Ferreira. Polímeros. 2011, 21, 1-6. [3] 'New Sulfonated Polystyrene and Styrene Ethylene/Butylene Styrene Block Copolymers for Applications in Electrodialysis'. Franciélli Müller, Carlos A. Ferreira, Lourdes Franco, Jordi Puiggali, Carlos Alemán, Elaine Armelin. J. Phys. Chem. B. 2012, 116, 11767-11779. [4] 'Electrochemical Impedance Spectroscopy employed in the study of the conductivity properties in membranes for electrodialysis'. Franciélli Müller, Carlos A. Ferreira, Elaine Armelin, Carlos Alemán. Manuscript in preparation, 2013. Congress: 1. ANQUE/ICCE International Congress in Chemical Engineering, 24-27 Junho, 2012, Sevilla, Espanha. ION-EXCHANGE MEMBRANES BASED ON SULFONATED POLYSTYRENE AND STYRENE-ETHYLENE/BUTYLENE-STYRENE BLOCK COPOLYMERS FOR APPLICATIONS IN ELECTRODIALYSIS. F. Müller et al. 2. Frontier in polymers science, 21-23 Maio, 2013, Sitges (Barcelona), Espanha. TRANSPORT OF IONS INSIDE POLYMERIC CATION EXCHANGE MEMBRANES: EXPERIMENTAL AND THEORETICAL STUDIES. F. Müller et al.
