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https://doi.org/10.21256/zhaw-1477| Publication type: | Article in scientific journal |
| Type of review: | Peer review (publication) |
| Title: | Spectroscopy on photografted polyethylene surfaces using a perfluorophenyl azide : evidence for covalent attachment |
| Authors: | Siegmann, Konstantin Inauen, Jan Sterchi, Robert Winkler, Martin |
| DOI: | 10.1002/sia.6359 10.21256/zhaw-1477 |
| Published in: | Surface and Interface Analysis |
| Volume(Issue): | 50 |
| Issue: | 2 |
| Page(s): | 205 |
| Pages to: | 211 |
| Issue Date: | 2017 |
| Publisher / Ed. Institution: | Wiley |
| ISSN: | 0142-2421 |
| Language: | English |
| Subjects: | Insertion; Nitrene; Perfluorophenyl; Azide; Photografting; Polyethylene; Spectroscopy |
| Subject (DDC): | 530: Physics |
| Abstract: | The 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. |
| Further description: | KTI Projekt: Kommission für Technologie und Innovation, Grant/Award Number: 17132.1 PFNM‐NM |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/1632 |
| Fulltext version: | Published version |
| License (according to publishing contract): | Licence according to publishing contract |
| Restricted until: | 2018-12-01 |
| Departement: | School of Engineering |
| Organisational Unit: | Institute of Materials and Process Engineering (IMPE) |
| Appears in collections: | Publikationen School of Engineering |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| Surf Interface Anal..pdf | 344.61 kB | Adobe PDF |  View/Open |
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Siegmann, K., Inauen, J., Sterchi, R., & Winkler, M. (2017). Spectroscopy on photografted polyethylene surfaces using a perfluorophenyl azide : evidence for covalent attachment. Surface and Interface Analysis, 50(2), 205–211. https://doi.org/10.1002/sia.6359
Siegmann, K. et al. (2017) ‘Spectroscopy on photografted polyethylene surfaces using a perfluorophenyl azide : evidence for covalent attachment’, Surface and Interface Analysis, 50(2), pp. 205–211. Available at: https://doi.org/10.1002/sia.6359.
K. Siegmann, J. Inauen, R. Sterchi, and M. Winkler, “Spectroscopy on photografted polyethylene surfaces using a perfluorophenyl azide : evidence for covalent attachment,” Surface and Interface Analysis, vol. 50, no. 2, pp. 205–211, 2017, doi: 10.1002/sia.6359.
SIEGMANN, Konstantin, Jan INAUEN, Robert STERCHI und Martin WINKLER, 2017. Spectroscopy on photografted polyethylene surfaces using a perfluorophenyl azide : evidence for covalent attachment. Surface and Interface Analysis. 2017. Bd. 50, Nr. 2, S. 205–211. DOI 10.1002/sia.6359
Siegmann, Konstantin, Jan Inauen, Robert Sterchi, and Martin Winkler. 2017. “Spectroscopy on Photografted Polyethylene Surfaces Using a Perfluorophenyl Azide : Evidence for Covalent Attachment.” Surface and Interface Analysis 50 (2): 205–11. https://doi.org/10.1002/sia.6359.
Siegmann, Konstantin, et al. “Spectroscopy on Photografted Polyethylene Surfaces Using a Perfluorophenyl Azide : Evidence for Covalent Attachment.” Surface and Interface Analysis, vol. 50, no. 2, 2017, pp. 205–11, https://doi.org/10.1002/sia.6359.
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