Sorption and diffusion of carbon dioxide in wood-fiber/polystyrene composites

Autor:	Saeed Doroudiani, Charles E. Chaffey, Mark T. Kortschot
Rok vydání:	2002
Předmět:	Materials science Polymers and Plastics Vapor pressure Diffusion Sorption Condensed Matter Physics Thermal diffusivity chemistry.chemical_compound chemistry Desorption Materials Chemistry Fiber Polystyrene Physical and Theoretical Chemistry Solubility Composite material
Zdroj:	Journal of Polymer Science Part B: Polymer Physics. 40:723-735
ISSN:	1099-0488 0887-6266
DOI:	10.1002/polb.10129
Popis:	In this study, sorption and diffusion of carbon dioxide (CO 2 ) in wood-fiber/ polystyrene composites were investigated. The effects of gas pressure and fiber content on the solubility and diffusion coefficients were evaluated. A statistical analysis indicated that pressure is more important than fiber content in determining the solubility and diffusivity of CO 2 . An increase in saturation pressure causes an increase in the solubility and diffusion coefficients, whereas inclusion of the fibers decreases both of these properties. Models were developed to predict the uptake and diffusion coefficients of CO 2 in the composite samples as functions of pressure and fiber content. A theoretical model based on Henry's law and the Langmuir equation compared favorably to the experimental data for CO 2 solubility. This dual mode model also described both the transient sorption and desorption data, but only if the concentration-dependent value of diffusivity was treated as a history-dependent parameter.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::db7a3950869b95d7852137f657815e9b https://doi.org/10.1002/polb.10129 Zobrazit plný text záznamu Plný text