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Title:Measurement of CO2 solubility and diffusivity in poly(L-lactide) and poly(D,L-lactide-co-glycolide) by magnetic suspension balance
Authors:ID Markočič, Elena (Author)
ID Škerget, Mojca (Author)
ID Knez, Željko (Author)
Files:URL http://dx.doi.org/10.1016/j.supflu.2008.07.011
 
Language:English
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
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.
Keywords:SC CO2, solubility, diffusivity, magnetic suspension balance
Year of publishing:2008
PID:20.500.12556/DKUM-26284 New window
UDC:66-987
ISSN on article:0896-8446
COBISS.SI-ID:12682262 New window
NUK URN:URN:SI:UM:DK:GBQ81QFM
Publication date in DKUM:31.05.2012
Views:1685
Downloads:102
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:Misc.
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Record is a part of a journal

Title:The Journal of supercritical fluids
Shortened title:J. supercrit. fluids
Publisher:PRA Press
ISSN:0896-8446
COBISS.SI-ID:25795072 New window

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