Gas transport properties of polypropylene/clay composite membranes



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García Villaluenga, Juan Pedro and Khayet Souhaimi, Mohamed and Lopez Manchado, M. A. and Valentin, J. L. and Seoane Rodríguez, Benjamín and Mengual Cabezón, Juan Ignacio (2007) Gas transport properties of polypropylene/clay composite membranes. European polymer journal, 43 (4). pp. 1132-1143. ISSN 0014-3057

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Polypropylene membranes modified with natural and organically modified montmorillonite clays were prepared. The permeability, diffusivity and solubility of helium, oxygen and nitrogen were determined for the unfilled and filled membranes over the temperature range 25-65 degrees C. Physical properties of polypropylene membranes were investigated using X-ray diffraction, thermogravimetric analyser, tensile testing and differential scanning calorimetry. The results showed that the filled membranes exhibit lower gas permeability compared to the unfilled polypropylene membrane. For helium, a reduced diffusivity is mainly responsible for the reduction in the permeability, in contrast, for nitrogen and oxygen, both diffusivity and solubility were reduced by the presence of fillers. The X-ray diffraction spectra showed that the incorporation of the unmodified and modified clay did not affect the crystallographic nature of polypropylene.

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© 2007 Elsevier Ltd. The authors of this study gratefully acknowledge the financial support of the Ministry of Science and Technology (MCYT, Spain) through its project No. PPQ2003-03299 and MAT 2004-00825. Dr. López Manchado also acknowledges the concession of a Ramón & Cajal contract from the MCYT.

Uncontrolled Keywords:Gas Permeability, Diffusion, Composite Membrane, Polypropylene
Subjects:Sciences > Physics > Thermodynamics
ID Code:24814
Deposited On:25 Mar 2014 08:17
Last Modified:05 Nov 2015 16:07

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