Effect of non-solvents used in the coagulation bath on morphology of PVDF membranes

AUTOR(ES)

Thürmer, Mônica Beatriz, Poletto, Patrícia, Marcolin, Marcos, Duarte, Jocelei, Zeni, Mara

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

13/09/2012

RESUMO

The aim of this paper was to prepare a poly (vinylidene fluoride) (PVDF) membrane using different non-solvents in the coagulation bath for the phase inversion method. In order to increase the mechanical strength of membranes, facing the pressure of work, was used a macro-porous polyester support. The morphology and structure of the resulting membranes were evaluated by scanning electron microscopy, porosity measurements, water and 1-octanol uptake, contact angle, pure water flux, hydraulic permeability and hydraulic resistance. The morphology and pure water flux changed significantly using ethanol (symmetric membrane) and/or water (asymmetric membrane) as the non-solvent. The symmetric membrane presented a high hydrophobic surface (water contact angle ~136º) and a higher pure water flux and porosity than the asymmetric membrane, which presented a lower hydrophobicity surface (water contact angle ~90º). The morphologies obtained suggest different applications.

Documentos Relacionados

• Coagulation Bath in The Production of Membranes of Nanocomposites Polyamide 6/Clay
• Effect of solvents on the morphology of PMMA films fabricated by spin-coating
• EFFECT OF POLY (N- VINYPYRROLIDONE) ON THE NON-ISOTHERMAL CRYSTALLIZATION KINETICS AND VISCOELASTIC PROPERTIES OF PVDF FILMS
• OBSERVATIONS ON THE EFFECT OF MAGNESIUM ON BLOOD COAGULATION
• A portable water-bath for use when investigating the coagulation mechanism