| Title: | Measurement of CO2 solubility and diffusivity in poly(L-lactide) and poly(D,L-lactide-co-glycolide) by magnetic suspension balance |
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| Authors: | ID Markočič, Elena (Author)
ID Škerget, Mojca (Author)
ID Knez, Željko (Author) |
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| Files: |  http://dx.doi.org/10.1016/j.supflu.2008.07.011
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| Language: | English |
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| Work type: | Unknown |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
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| Abstract: | The solubility of supercritical carbon dioxide (scCO2) in poly(l-lactide) and poly(d,l-lactide-co-glycolide) at different temperatures (308, 313 and 323 K) and pressures (10-30 MPa) was measured using a magnetic suspension balance. The solubility data were also used for estimating the binary diffusion coefficients. The results show a good solubility of CO2 in both polymers: up to 43% in poly(l-lactide) and 30% in poly(d,l-lactide-co-glycolide). The diffusion coefficients have high values, which verify the liquid-like solvating properties of scCO2. The diffusion coefficient depends on the quantity of gas already absorbed by the polymer; its values decrease with increasing gas concentration. |
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| Keywords: | SC CO2, solubility, diffusivity, magnetic suspension balance |
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| Year of publishing: | 2008 |
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| PID: | 20.500.12556/DKUM-26284  |
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| UDC: | 66-987 |
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| ISSN on article: | 0896-8446 |
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| COBISS.SI-ID: | 12682262 |
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| NUK URN: | URN:SI:UM:DK:GBQ81QFM |
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| Publication date in DKUM: | 31.05.2012 |
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| Views: | 1892 |
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| Downloads: | 109 |
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| Metadata: |    |
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| Categories: | Misc.
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