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dc.contributor.author
Ivanovic, Jasna
dc.contributor.author
Knauer, Sandra
dc.contributor.author
Fanovich, Maria Alejandra
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dc.contributor.author
Milovanovic, Stoja
dc.contributor.author
Stamenic, Marko
dc.contributor.author
Jaeger, Philip
dc.contributor.author
Zizovic, Irena
dc.contributor.author
Eggers, Rudolf
dc.date.available
2018-03-21T22:00:37Z
dc.date.issued
2016-01
dc.identifier.citation
Ivanovic, Jasna; Knauer, Sandra; Fanovich, Maria Alejandra; Milovanovic, Stoja; Stamenic, Marko; et al.; Supercritical CO2 sorption kinetics and thymol impregnation of PCL and PCL-HA; Elsevier Science; Journal of Supercritical Fluids; 107; 1-2016; 486-498
dc.identifier.issn
0896-8446
dc.identifier.uri
http://hdl.handle.net/11336/39602
dc.description.abstract
The potential of supercritical carbon dioxide (scCO2) processing of polycaprolactone (PCL) and polycaprolactone-hydroxyapatite (PCL-HA) composites for obtaining functional porous scaffolds at moderate temperatures (35-40 °C) was analyzed and quantified. The effect of scCO2 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 °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 ∼200-300 μm), filler distribution and thymol impregnation yields (12-18%). This was due to the satisfactory high scCO2 solubility (0.25-0.30 g/g) and mass transfer rate (∼10-10 m2/s) in the polymer phase as well as its great plasticizing effect (-ΔTm = 26.4-27.4 °C). Higher saturation of the polymer phase with scCO2 (0.30-0.55 g/g), filler amount (20%) and thymol solubility in scCO2 (>5.5 g/kg) at pressures above 20 MPa resulted in decreased mass transfer rate and SSI efficiency.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Co2 Sorption Kinetics
dc.subject
High-Pressure Dsc
dc.subject
Melting Point Depression
dc.subject
Polycaprolactone
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Polycaprolactone-Hydroxyapatite
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Thymol Impregnation
dc.subject.classification
Recubrimientos y Películas
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dc.subject.classification
Ingeniería de los Materiales
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Supercritical CO2 sorption kinetics and thymol impregnation of PCL and PCL-HA
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-03-21T16:03:24Z
dc.journal.volume
107
dc.journal.pagination
486-498
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Ivanovic, Jasna. University of Belgrade. Faculty of Technology and Metallurgy; Serbia
dc.description.fil
Fil: Knauer, Sandra. Eurotechnica; Alemania
dc.description.fil
Fil: Fanovich, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
dc.description.fil
Fil: Milovanovic, Stoja. University of Belgrade. Faculty of Technology and Metallurgy; Serbia
dc.description.fil
Fil: Stamenic, Marko. University of Belgrade. Faculty of Technology and Metallurgy; Serbia
dc.description.fil
Fil: Jaeger, Philip. Eurotechnica; Alemania
dc.description.fil
Fil: Zizovic, Irena. University of Belgrade. Faculty of Technology and Metallurgy; Serbia
dc.description.fil
Fil: Eggers, Rudolf. Hamburg University of Technology; Alemania
dc.journal.title
Journal of Supercritical Fluids
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.supflu.2015.07.001
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0896844615300541
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