Please use this identifier to cite or link to this item: https://doi.org/10.15480/882.3683
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dc.contributor.authorDirauf, Martin P.-
dc.contributor.authorHajnal, Anja-
dc.contributor.authorGurikov, Pavel-
dc.contributor.authorBraeuer, Andreas Siegfried-
dc.date.accessioned2021-07-29T05:20:01Z-
dc.date.available2021-07-29T05:20:01Z-
dc.date.issued2021-05-31-
dc.identifier.citationFood Hydrocolloids 120: 106916 (2021-11-01)de_DE
dc.identifier.issn1873-7137de_DE
dc.identifier.urihttp://hdl.handle.net/11420/9958-
dc.description.abstractIn this work, we experimentally investigate into one step solvent exchange of cylindrical shaped whey protein isolate (WPI) gels, where the pore fluid water inside the pores is replaced by ethanol. Solvent exchange has three major impacts on macroscopic gel properties, leading to an increase in compressive strength, shrinkage of the gel cylinders diameter and consequently a change in the spatial protein distribution. 1D-Raman spectroscopy was employed for in-situ investigation of pore fluid composition and protein density distribution, together with a conventional camera to track the diameter change of the gel during solvent exchange. Compressive strength of the gel cylinders is measured ex-situ using a universal testing machine. For gels with three different protein concentrations, we report comparable shrinkage of the diameter to about 85% of the initial size, with most shrinkage taking place during the first stages of solvent exchange, when ethanol is detected in the outermost layers only. Further shrinkage is prevented by a sharp increase in mechanical stiffness of the gels. Solvent exchange leads to an inhomogeneous protein density distribution for most gels, with a compaction towards the radial center. We showed a complex interaction of solvent exchange kinetics and pore fluid dependent stiffness of the gel matrix controls the final size and density distribution of the gel.en
dc.description.sponsorshipDeutsche Forschungsgemeinschaft (DFG)de_DE
dc.language.isoende_DE
dc.publisherElsevierde_DE
dc.relation.ispartofFood hydrocolloidsde_DE
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/de_DE
dc.subject1-D Raman spectroscopyde_DE
dc.subjectProtein gelsde_DE
dc.subjectShrinkagede_DE
dc.subjectSolvent exchangede_DE
dc.subjectWhey protein isolatede_DE
dc.subject.ddc600: Technikde_DE
dc.titleProtein gel shrinkage during solvent exchange: quantification of gel compaction, mass transfer and compressive strengthde_DE
dc.typeArticlede_DE
dc.identifier.doi10.15480/882.3683-
dc.type.diniarticle-
dcterms.DCMITypeText-
tuhh.identifier.urnurn:nbn:de:gbv:830-882.0140690-
tuhh.oai.showtruede_DE
tuhh.abstract.englishIn this work, we experimentally investigate into one step solvent exchange of cylindrical shaped whey protein isolate (WPI) gels, where the pore fluid water inside the pores is replaced by ethanol. Solvent exchange has three major impacts on macroscopic gel properties, leading to an increase in compressive strength, shrinkage of the gel cylinders diameter and consequently a change in the spatial protein distribution. 1D-Raman spectroscopy was employed for in-situ investigation of pore fluid composition and protein density distribution, together with a conventional camera to track the diameter change of the gel during solvent exchange. Compressive strength of the gel cylinders is measured ex-situ using a universal testing machine. For gels with three different protein concentrations, we report comparable shrinkage of the diameter to about 85% of the initial size, with most shrinkage taking place during the first stages of solvent exchange, when ethanol is detected in the outermost layers only. Further shrinkage is prevented by a sharp increase in mechanical stiffness of the gels. Solvent exchange leads to an inhomogeneous protein density distribution for most gels, with a compaction towards the radial center. We showed a complex interaction of solvent exchange kinetics and pore fluid dependent stiffness of the gel matrix controls the final size and density distribution of the gel.de_DE
tuhh.publisher.doi10.1016/j.foodhyd.2021.106916-
tuhh.publication.instituteEntwicklung und Modellierung Neuartiger Nanoporöser Materialien V-EXK2de_DE
tuhh.identifier.doi10.15480/882.3683-
tuhh.type.opus(wissenschaftlicher) Artikel-
dc.type.driverarticle-
dc.type.casraiJournal Article-
tuhh.container.volume120de_DE
dc.relation.projectStofftransportprozesse bei der Herstellung von biopolymerbasierten Aerogelen: in situ Charakterisierung und Modellierungde_DE
dc.rights.nationallicensefalsede_DE
dc.identifier.scopus2-s2.0-85107723483de_DE
tuhh.container.articlenumber106916de_DE
local.status.inpressfalsede_DE
local.type.versionpublishedVersionde_DE
local.funding.infoThe authors gratefully acknowledge financial support for parts of this work through the projects BR 3766/19–1 by the German Research Foundation (Deutsche Forschungsgemeinschaft – DFG).de_DE
datacite.resourceTypeJournal Article-
datacite.resourceTypeGeneralText-
item.creatorOrcidDirauf, Martin P.-
item.creatorOrcidHajnal, Anja-
item.creatorOrcidGurikov, Pavel-
item.creatorOrcidBraeuer, Andreas Siegfried-
item.grantfulltextopen-
item.creatorGNDDirauf, Martin P.-
item.creatorGNDHajnal, Anja-
item.creatorGNDGurikov, Pavel-
item.creatorGNDBraeuer, Andreas Siegfried-
item.mappedtypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.fulltextWith Fulltext-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.openairetypeArticle-
crisitem.project.funderDeutsche Forschungsgemeinschaft (DFG)-
crisitem.project.funderid501100001659-
crisitem.project.funderrorid018mejw64-
crisitem.project.grantnoGU 1842/3-1-
crisitem.author.deptEntwicklung und Modellierung Neuartiger Nanoporöser Materialien V-EXK2-
crisitem.author.deptEntwicklung und Modellierung Neuartiger Nanoporöser Materialien V-EXK2-
crisitem.author.orcid0000-0002-9010-7877-
crisitem.author.orcid0000-0003-0598-243X-
crisitem.author.orcid0000-0002-7816-4027-
crisitem.author.parentorgStudiendekanat Verfahrenstechnik (V)-
crisitem.author.parentorgStudiendekanat Verfahrenstechnik (V)-
crisitem.funder.funderid501100001659-
crisitem.funder.funderrorid018mejw64-
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