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dc.creatorIvanović, Jasna
dc.creatorKnauer, Sandra
dc.creatorFanovich, Alejandra
dc.creatorMilovanović, Stoja
dc.creatorStamenić, Marko
dc.creatorJaeger, Philip
dc.creatorŽižović, Irena
dc.creatorEggers, Rudolf
dc.date.accessioned2021-03-10T13:12:12Z
dc.date.available2021-03-10T13:12:12Z
dc.date.issued2016
dc.identifier.issn0896-8446
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/3407
dc.description.abstractThe 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.publisherElsevier, Amsterdam
dc.relationEurotechnica GmbH (Bargteheide,Germany)
dc.relationTuTech Innovation GmbH
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45017/RS//
dc.relationTUHH (Hamburg, Germany)
dc.rightsrestrictedAccess
dc.sourceJournal of Supercritical Fluids
dc.subjectPolycaprolactoneen
dc.subjectPolycaprolactone-hydroxyapatiteen
dc.subjectCO2 sorption kineticsen
dc.subjectHigh-pressure DSCen
dc.subjectMelting point depressionen
dc.subjectThymol impregnationen
dc.titleSupercritical CO2 sorption kinetics and thymol impregnation of PCL and PCL-HAen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage498
dc.citation.other107: 486-498
dc.citation.rankM21
dc.citation.spage486
dc.citation.volume107
dc.identifier.doi10.1016/j.supflu.2015.07.001
dc.identifier.scopus2-s2.0-84947487391
dc.identifier.wos000366077100058
dc.type.versionpublishedVersion


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