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Critical parameters controlling the properties of monolithic poly(lactic acid) foams prepared by thermally induced phase separation

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dc.contributor.coauthorN/A
dc.contributor.departmentDepartment of Chemistry
dc.contributor.departmentKUYTAM (Koç University Surface Science and Technology Center)
dc.contributor.facultymemberYes
dc.contributor.kuauthorÖnder, Özgün Can
dc.contributor.kuauthorYılgör, Emel
dc.contributor.kuauthorYılgör, İskender
dc.contributor.schoolcollegeinstituteCollege of Sciences
dc.contributor.schoolcollegeinstituteResearch Center
dc.date.accessioned2024-11-09T23:03:49Z
dc.date.issued2019
dc.description.abstractMonolithic poly(lactic acid) (PLA) foams were produced by thermally induced phase separation. PLA solutions with concentrations 8-22 wt % were prepared in tetrahydrofuran/methanol (THF/MeOH) solvent/nonsolvent mixtures at 55 degrees C. Homogenous solutions were quenched at -20 degrees C to induce phase separation and gelation. Resulting gels were mechanically stabilized by solvent exchange. Subsequent supercritical CO2 drying yielded monolithic PLA foams. Crystal structure and degree of crystallinity of the foams were obtained by x-ray diffractometry and differential scanning calorimetry. Morphologies were determined by scanning electron microscopy. Tuning the PLA concentration and THF/MeOH ratio enabled preparation of monolithic PLA foams. Depending on the experimental conditions various morphologies, such as: interconnected networks, thin platelets, lamellar stacks, axialites, and spherulites were formed. Monoliths obtained were highly crystalline. By changing the PLA concentration monoliths with controlled average pore sizes (170-1440 nm) and porosities (80-90%) were produced.
dc.description.fulltextNo
dc.description.harvestedfromManual
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.openaccessNO
dc.description.peerreviewstatusN/A
dc.description.publisherscopeInternational
dc.description.readpublishN/A
dc.description.sponsoredbyTubitakEuTÜBİTAK
dc.description.sponsorshipThis study was partially supported by TUBITAK (The Scientific and Technological Research Council of Turkey, 2211-A Domestic Doctoral Scholarship Program).
dc.description.studentonlypublicationNo
dc.description.studentpublicationYes
dc.description.versionN/A
dc.identifier.WoSQuartileQ2
dc.identifier.doi10.1002/polb.24762
dc.identifier.eissn1099-0488
dc.identifier.embargoN/A
dc.identifier.endpage108
dc.identifier.grantno2211-A
dc.identifier.issn0887-6266
dc.identifier.issue2
dc.identifier.scopus2-s2.0-85056793454
dc.identifier.startpage98
dc.identifier.urihttps://doi.org/10.1002/polb.24762
dc.identifier.urihttps://hdl.handle.net/20.500.14288/8534
dc.identifier.volume57
dc.identifier.wos000453458200003
dc.keywordsFoams
dc.keywordsMorphology
dc.keywordsPhase separation
dc.keywordsPLA crystallization
dc.keywordsPoly(lactic acid) foams
dc.keywordsThermally induced phase separation
dc.language.isoeng
dc.publisherJohn Wiley and Sons Inc.
dc.relation.affiliationKoç University
dc.relation.collectionKoç University Institutional Repository
dc.relation.ispartofJournal of Polymer Science Part B-Polymer Physics
dc.relation.openaccessN/A
dc.rightsN/A
dc.subjectPolymer science
dc.titleCritical parameters controlling the properties of monolithic poly(lactic acid) foams prepared by thermally induced phase separation
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorÖnder, Özgün Can
local.contributor.kuauthorYılgör, Emel
local.contributor.kuauthorYılgör, İskender
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