n-Hexane induced swelling of thin PDMS films under non-equilibrium nanofiltration permeation conditions, resolved by spectroscopic ellipsometry

Wojciech Ogieglo, J.C.A. van der Werf, Kristianne Tempelman, Herbert Wormeester, Matthias Wessling, Arian Nijmeijer, Nieck Edwin Benes

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Abstract

A nondestructivetechniqueispresentedforin-situanalysisofsolventinducedmembraneswelling.The techniqueisbasedonspectroscopicellipsometry(SE)andallowssimultaneousmeasurementof membranefilmthicknessandsolventsorption.Theattainableexperimentalconditionsareonlylimited by thetestcell(r473.15 K, r20 MPa)andbyfarexceedthoseencounteredintypicalsolventresistant nanofiltration(SRNF)applications.Theinfluenceofcross-linkerconcentrationonswellingofthinfilms and bulksamplesofpoly(dimethylsiloxane)(PDMS)isresolvedandinteractionparametersaccording to Flory–HugginsandFlory–Rehnertheoriesarecalculated.Itisfoundthatduetoconfinementonthe supportforthethinsupportedfilmsacorrectionforelasticdeformationofthenetworkisnecessary.In the pressurizedswollenfilmthethicknessandrefractiveindexarefoundtobeindependentofpressure in therangeof0.1–10MPasuggestingthatthemolarvolumesofthepenetrantintheliquidandsorbed phasesarenotsignificantlydifferent.Whenapressuredifferenceoverthemembraneisappliedandthe solventisallowedtopermeate,aprogressingreductioninthicknessofthemembraneisobservedwith increasingupstreampressure.Thederivedconcentrationsofn-hexaneattheinterfacebetweenthin film andsupport,atthepermeateside,areinexcellentagreementwithvaluescalculatedusingthe solution–diffusionmodel.Thisimpliesthatin-situspectroscopicellipsometryallowsquantificationof the contributionofsolution–diffusiontomixedmodetransport,forinstanceoccurringsimultaneously with pore-flowandtransportthroughdefects,incompositemembranes.
Original languageEnglish
Pages (from-to)233-243
Number of pages11
JournalJournal of membrane science
Volume431
DOIs
Publication statusPublished - 2013

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Dimethylpolysiloxanes
Nanofiltration
Spectroscopic ellipsometry
Hexane
Permeation
swelling
ellipsometry
Swelling
porosity
Thin films
thin films
n-hexane

Keywords

  • METIS-296583
  • IR-86902

Cite this

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title = "n-Hexane induced swelling of thin PDMS films under non-equilibrium nanofiltration permeation conditions, resolved by spectroscopic ellipsometry",
abstract = "A nondestructivetechniqueispresentedforin-situanalysisofsolventinducedmembraneswelling.The techniqueisbasedonspectroscopicellipsometry(SE)andallowssimultaneousmeasurementof membranefilmthicknessandsolventsorption.Theattainableexperimentalconditionsareonlylimited by thetestcell(r473.15 K, r20 MPa)andbyfarexceedthoseencounteredintypicalsolventresistant nanofiltration(SRNF)applications.Theinfluenceofcross-linkerconcentrationonswellingofthinfilms and bulksamplesofpoly(dimethylsiloxane)(PDMS)isresolvedandinteractionparametersaccording to Flory–HugginsandFlory–Rehnertheoriesarecalculated.Itisfoundthatduetoconfinementonthe supportforthethinsupportedfilmsacorrectionforelasticdeformationofthenetworkisnecessary.In the pressurizedswollenfilmthethicknessandrefractiveindexarefoundtobeindependentofpressure in therangeof0.1–10MPasuggestingthatthemolarvolumesofthepenetrantintheliquidandsorbed phasesarenotsignificantlydifferent.Whenapressuredifferenceoverthemembraneisappliedandthe solventisallowedtopermeate,aprogressingreductioninthicknessofthemembraneisobservedwith increasingupstreampressure.Thederivedconcentrationsofn-hexaneattheinterfacebetweenthin film andsupport,atthepermeateside,areinexcellentagreementwithvaluescalculatedusingthe solution–diffusionmodel.Thisimpliesthatin-situspectroscopicellipsometryallowsquantificationof the contributionofsolution–diffusiontomixedmodetransport,forinstanceoccurringsimultaneously with pore-flowandtransportthroughdefects,incompositemembranes.",
keywords = "METIS-296583, IR-86902",
author = "Wojciech Ogieglo and {van der Werf}, J.C.A. and Kristianne Tempelman and Herbert Wormeester and Matthias Wessling and Arian Nijmeijer and Benes, {Nieck Edwin}",
year = "2013",
doi = "10.1016/j.memsci.2012.12.045",
language = "English",
volume = "431",
pages = "233--243",
journal = "Journal of membrane science",
issn = "0376-7388",
publisher = "Elsevier",

}

n-Hexane induced swelling of thin PDMS films under non-equilibrium nanofiltration permeation conditions, resolved by spectroscopic ellipsometry. / Ogieglo, Wojciech; van der Werf, J.C.A.; Tempelman, Kristianne; Wormeester, Herbert; Wessling, Matthias; Nijmeijer, Arian; Benes, Nieck Edwin.

In: Journal of membrane science, Vol. 431, 2013, p. 233-243.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - n-Hexane induced swelling of thin PDMS films under non-equilibrium nanofiltration permeation conditions, resolved by spectroscopic ellipsometry

AU - Ogieglo, Wojciech

AU - van der Werf, J.C.A.

AU - Tempelman, Kristianne

AU - Wormeester, Herbert

AU - Wessling, Matthias

AU - Nijmeijer, Arian

AU - Benes, Nieck Edwin

PY - 2013

Y1 - 2013

N2 - A nondestructivetechniqueispresentedforin-situanalysisofsolventinducedmembraneswelling.The techniqueisbasedonspectroscopicellipsometry(SE)andallowssimultaneousmeasurementof membranefilmthicknessandsolventsorption.Theattainableexperimentalconditionsareonlylimited by thetestcell(r473.15 K, r20 MPa)andbyfarexceedthoseencounteredintypicalsolventresistant nanofiltration(SRNF)applications.Theinfluenceofcross-linkerconcentrationonswellingofthinfilms and bulksamplesofpoly(dimethylsiloxane)(PDMS)isresolvedandinteractionparametersaccording to Flory–HugginsandFlory–Rehnertheoriesarecalculated.Itisfoundthatduetoconfinementonthe supportforthethinsupportedfilmsacorrectionforelasticdeformationofthenetworkisnecessary.In the pressurizedswollenfilmthethicknessandrefractiveindexarefoundtobeindependentofpressure in therangeof0.1–10MPasuggestingthatthemolarvolumesofthepenetrantintheliquidandsorbed phasesarenotsignificantlydifferent.Whenapressuredifferenceoverthemembraneisappliedandthe solventisallowedtopermeate,aprogressingreductioninthicknessofthemembraneisobservedwith increasingupstreampressure.Thederivedconcentrationsofn-hexaneattheinterfacebetweenthin film andsupport,atthepermeateside,areinexcellentagreementwithvaluescalculatedusingthe solution–diffusionmodel.Thisimpliesthatin-situspectroscopicellipsometryallowsquantificationof the contributionofsolution–diffusiontomixedmodetransport,forinstanceoccurringsimultaneously with pore-flowandtransportthroughdefects,incompositemembranes.

AB - A nondestructivetechniqueispresentedforin-situanalysisofsolventinducedmembraneswelling.The techniqueisbasedonspectroscopicellipsometry(SE)andallowssimultaneousmeasurementof membranefilmthicknessandsolventsorption.Theattainableexperimentalconditionsareonlylimited by thetestcell(r473.15 K, r20 MPa)andbyfarexceedthoseencounteredintypicalsolventresistant nanofiltration(SRNF)applications.Theinfluenceofcross-linkerconcentrationonswellingofthinfilms and bulksamplesofpoly(dimethylsiloxane)(PDMS)isresolvedandinteractionparametersaccording to Flory–HugginsandFlory–Rehnertheoriesarecalculated.Itisfoundthatduetoconfinementonthe supportforthethinsupportedfilmsacorrectionforelasticdeformationofthenetworkisnecessary.In the pressurizedswollenfilmthethicknessandrefractiveindexarefoundtobeindependentofpressure in therangeof0.1–10MPasuggestingthatthemolarvolumesofthepenetrantintheliquidandsorbed phasesarenotsignificantlydifferent.Whenapressuredifferenceoverthemembraneisappliedandthe solventisallowedtopermeate,aprogressingreductioninthicknessofthemembraneisobservedwith increasingupstreampressure.Thederivedconcentrationsofn-hexaneattheinterfacebetweenthin film andsupport,atthepermeateside,areinexcellentagreementwithvaluescalculatedusingthe solution–diffusionmodel.Thisimpliesthatin-situspectroscopicellipsometryallowsquantificationof the contributionofsolution–diffusiontomixedmodetransport,forinstanceoccurringsimultaneously with pore-flowandtransportthroughdefects,incompositemembranes.

KW - METIS-296583

KW - IR-86902

U2 - 10.1016/j.memsci.2012.12.045

DO - 10.1016/j.memsci.2012.12.045

M3 - Article

VL - 431

SP - 233

EP - 243

JO - Journal of membrane science

JF - Journal of membrane science

SN - 0376-7388

ER -