Diffusion and desorption of CO2 in foamed polystyrene film |
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| Authors: | Ying‐Hui Qian Jun‐Ming Cao Xue‐Kun Li Gui‐Ping Cao Chang‐Chun Wang Yun‐Hai Shi |
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| Affiliation: | 1. UNILAB, State Key Lab of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai, China;2. Department of Chemistry, Fudan University, Shanghai, China;3. Department of Macromolecular Science, Fudan University, Shanghai, China |
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| Abstract: | Based on the existence of the pores in foamed polystyrene (PS), foamed‐non‐Fickian diffusion (FNFD) model was proposed, for the first time, to regress the desorption data obtained by gravimetric method. Results showed that FNFD model could accurately describe the diffusion behavior of CO2 out of foamed PS, and well predict the solubility of CO2 in foamed PS. The characterization of scanning electron microscopy indicated that there were abundant pores in the foamed PS, and the pores store most of CO2, which would diffuse in the pores, adsorb to the wall of the pores, penetrate across walls of the pores, diffuse in the matrix of PS, and desorb out of PS. The mass of CO2 in the pores of foamed PS was expressed as a function of foaming pressure and temperature according to foaming kinetics. Results showed that the values calculated by this function agreed well with the values obtained from the FNFD model. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 45645. |
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| Keywords: | diffusion foamed PS micromolecule solubility |
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