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Supercritical CO2 sorption kinetics and thymol impregnation of PCL and PCL-HA
dc.creator | Ivanović, Jasna | |
dc.creator | Knauer, Sandra | |
dc.creator | Fanovich, Alejandra | |
dc.creator | Milovanović, Stoja | |
dc.creator | Stamenić, Marko | |
dc.creator | Jaeger, Philip | |
dc.creator | Žižović, Irena | |
dc.creator | Eggers, Rudolf | |
dc.date.accessioned | 2021-03-10T13:12:12Z | |
dc.date.available | 2021-03-10T13:12:12Z | |
dc.date.issued | 2016 | |
dc.identifier.issn | 0896-8446 | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3407 | |
dc.description.abstract | The potential of supercritical carbon dioxide (scCO(2)) processing of polycaprolactone (Pa) and polycaprolactone-hydroxyapatite (PCL-HA) composites for obtaining functional porous scaffolds at moderate temperatures (35-40 degrees C) was analyzed and quantified. The effect of scCO(2) sorption kinetics on the swelling, foam morphology and thermal behavior of the PCL and PCL-HA composites was studied. Sorption isotherms were determined using magnetic suspension balance at 10-30 MPa and 35-40 degrees C. Influence of the pressure, HA amount (10-20%) and procedure for HA powder preparation on the sorption kinetics was discussed. Supercritical solvent impregnation (SSI) of PCL and PCL-HA with thymol was investigated as environmentally friendly way to produce functional scaffolds with controlled microstructure. Moderately high pressures (13-17 MPa) and 10% of HA were proven to be favorable for creation of the PCL scaffolds with satisfying foam microstructure (mean pore size similar to 200-300 mu m), filler distribution and thymol impregnation yields (12-18%). This was due to the satisfactory high scCO(2) solubility (0.25-0.30 g/g) and mass transfer rate (similar to 10(-10) m(2)/s) in the polymer phase as well as its great plasticizing effect (-Delta T-m = 26.4-27.4 degrees C). Higher saturation of the polymer phase with scCO(2) (0.30-0.55 g/g), filler amount (20%) and thymol solubility in scCO(2) ( gt 5.5 g/kg) at pressures above 20 MPa resulted in decreased mass transfer rate and SSI efficiency. | en |
dc.publisher | Elsevier, Amsterdam | |
dc.relation | Eurotechnica GmbH (Bargteheide,Germany) | |
dc.relation | TuTech Innovation GmbH | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45017/RS// | |
dc.relation | TUHH (Hamburg, Germany) | |
dc.rights | restrictedAccess | |
dc.source | Journal of Supercritical Fluids | |
dc.subject | Polycaprolactone | en |
dc.subject | Polycaprolactone-hydroxyapatite | en |
dc.subject | CO2 sorption kinetics | en |
dc.subject | High-pressure DSC | en |
dc.subject | Melting point depression | en |
dc.subject | Thymol impregnation | en |
dc.title | Supercritical CO2 sorption kinetics and thymol impregnation of PCL and PCL-HA | en |
dc.type | article | |
dc.rights.license | ARR | |
dc.citation.epage | 498 | |
dc.citation.other | 107: 486-498 | |
dc.citation.rank | M21 | |
dc.citation.spage | 486 | |
dc.citation.volume | 107 | |
dc.identifier.doi | 10.1016/j.supflu.2015.07.001 | |
dc.identifier.scopus | 2-s2.0-84947487391 | |
dc.identifier.wos | 000366077100058 | |
dc.type.version | publishedVersion |