Pore morphology and temperature dependence of gas transport properties of silica membranes derived from oxidative thermolysis of polydimethylsiloxane

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• 作者：Jason Adams ^{Jasonadams110@gmail.com} ; Neha Bighane ^{Nbighane3@gmail.com} ; William J. Koros ; ^{Wjk@chbe.gatech.edu}
• 关键词：Silica membranes ; Polysiloxanes ; Entropic selectivity ; Temperature dependence ; Gas separations
• 刊名：Journal of Membrane Science
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：524
• 期：Complete
• 页码：585-595
• 全文大小：1046 K
• 卷排序：524

文摘

Two novel silica materials were derived from thermally oxidized PDMS precursors. The pore morphology of these silicas were characterized by N2 and CO2 physisorption. The sorption, diffusion, and permeation properties were measured between 35–100 °C. Gas permselectivities were deconvoluted into sorption and diffusion selectivities. Diffusion selectivities were deconvoluted into energetic and entropic components.