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Preparation and characterization of PA66/alumina composite membrane

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Preparation and characterization of PA66/alumina composite membrane

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Título Preparation and characterization of PA66/alumina composite membrane
Autor Biron, Dionisio da Silva
Poletto, Patrícia
Duarte, Jocelei
Andrade, Mára Zeni
Bergmann, Carlos Perez
Santos, Venina dos
Abstract In this study, polymer/ceramic composite membranes were prepared and characterized. The polymer used was polyamide 66 (PA66) deposited by dip coating on the inner surface of α-alumina-based (Al2O3) microporous tube. A coating on the ceramic support surface and the formation of the selective layer was analyzed by scanning electron microscopy (SEM) in membranes with one (PA-1) and two layers (PA-2). The results of mercury porosimetry showed that the deposition of the polyamide layers decreases the average pore size. The PA-1 presented an average pore size of 0.35 μm, while the PA-2 presented two peaks of 0.18 and 0.56 μm. Both showed a superior performance than the ceramic support (pore diameter of 0.65 μm). Although, the permeate flux was higher with an impregnation membrane, the number of layers (one or two) just introduced a slight difference in pore statistical analysis. The order of rejection coefficient values for protein molecules is BSA > egg albumin > trypsin. The permeation tests showed that the composite membrane can be applied in ultrafiltration processes with MWCO of 69 kDa.
Contido em Materials research : ibero-american journal of materials. São Carlos, SP. Vol. 18, no. 4 (July/Aug. 2015), p. 748-755
Assunto Alumina
Membranas cerâmicas
Permeabilidade
[en] Composite membrane
[en] PA66-α-alumina membrane
[en] Permeability
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/129509
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