Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-1477
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dc.contributor.authorSiegmann, Konstantin-
dc.contributor.authorInauen, Jan-
dc.contributor.authorSterchi, Robert-
dc.contributor.authorWinkler, Martin-
dc.date.accessioned2017-11-30T14:55:39Z-
dc.date.available2017-11-30T14:55:39Z-
dc.date.issued2017-11-28-
dc.identifier.issn0142-2421de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/1632-
dc.descriptionKTI Projekt: Kommission für Technologie und Innovation, Grant/Award Number: 17132.1 PFNM‐NMde_CH
dc.description.abstractThe present study was conducted in order to confirm C―H insertion of a perfluorophenyl nitrene, produced by UV‐irradiation of a perfluorophenyl azide, to polyethylene surfaces. It was shown previously that water‐repelling, oil‐repelling, and dirt‐repelling polyethylene surfaces can be created by “grafting to” of perfluoroalkanes using a photoreactive surface modifier based on azide/nitrene chemistry. The abrasion resistance of the new surfaces was enhanced compared with a coating using a simple, long‐chain perfluoroalkane. However, covalent binding of the surface modifier was not unequivocally demonstrated. Here, spectroscopic information is presented suggesting that, indeed, a monomolecular, covalently bound grafted layer is formed from the photodecomposition of a perfluorophenyl azide on polyethylene surfaces. Infrared spectroscopy showed that the peak from the azide moiety disappeared upon UV‐irradiation, and the light dose for completion of the photo decomposition was determined to be approximately 322 mJ/cm2. A model compound mimicking the grafted nitrene species was synthesized, having a λmax of 281 nm in hexane. The photografted and washed layer had a λmax of 286 nm, indicating a good conformity with the model compound. X‐ray photoelectron spectroscopy of the nitrogen species from the photografted layer showed a peak at 400.0 eV. The model compound had a N 1s binding energy of 399.7 eV, thus being comparable.de_CH
dc.language.isoende_CH
dc.publisherWileyde_CH
dc.relation.ispartofSurface and Interface Analysisde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectInsertionde_CH
dc.subjectNitrenede_CH
dc.subjectPerfluorophenylde_CH
dc.subjectAzidede_CH
dc.subjectPhotograftingde_CH
dc.subjectPolyethylenede_CH
dc.subjectSpectroscopyde_CH
dc.subject.ddc530: Physikde_CH
dc.titleSpectroscopy on photografted polyethylene surfaces using a perfluorophenyl azide : evidence for covalent attachmentde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitute of Materials and Process Engineering (IMPE)de_CH
dc.identifier.doi10.1002/sia.6359de_CH
dc.identifier.doi10.21256/zhaw-1477de_CH
zhaw.funding.euNode_CH
zhaw.originated.zhawYesde_CH
zhaw.publication.statusacceptedVersionde_CH
zhaw.embargo.end2018-12-01-
zhaw.publication.reviewPeer review (Publikation)de_CH
zhaw.webfeedPolymere Beschichtungende_CH
Appears in Collections:Publikationen School of Engineering

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