Gas Transport Through Nano Poly(ethylene-co-vinyl acetate) Composite Membranes

详细信息    查看全文

• 作者：S. Anil Kumar ; He Yuelong ; Ding Yumei ; Yang Le ; M.G. Kumaran ; Sabu Thomas
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2008
• 出版时间：July 16, 2008
• 年：2008
• 卷：47
• 期：14
• 页码：4898 - 4904
• 全文大小：413K
• 年卷期：v.47,no.14(July 16, 2008)
• ISSN：1520-5045

文摘

Poly(ethylene-co-vinyl acetate)−clay nanocomposites containing different filler loading were prepared. Transport of gases through the composite membranes was investigated, and the results were compared with the unfilled one. Transport studies revealed that gas transport was considerably reduced by the incorporation of clay filler into the polymer matrix especially at a loading of 3 wt % filler. It was also found that permeability increased for composites containing more than 3 wt %. This is presumably due to aggregation of clay filler at higher loading. The morphology of nanocomposites was analyzed by X-ray diffraction and transmission electron microscopy. Dielectric loss data were also used to understand the uniformity of dispersion of nanoparticles. The effect of free volume on transport behavior was investigated by positron lifetime spectroscopic analysis. The cross-link density values were estimated to correlate with the gas barrier properties. The oxygen/nitrogen selectivity of these membranes was investigated.