Surface modification of nanofibrillated cellulose films by atmospheric pressure dielectric barrier discharge |
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| Authors: | István Siró Yukihiro Kusano Kion Norrman Stergios Goutianos David Plackett |
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| Affiliation: | 1. Department of Chemical and Biochemical Engineering , Technical University of Denmark , Building 229, S?ltofts Plads, DK-2800 Kgs, Lyngby , Denmark;2. Department of Wind Energy , Technical University of Denmark , Ris? Campus, Building 228, Frederiksborgvej 399, DK-4000 , Roskilde , Denmark;3. Department of Energy Conversion and Storage , Technical University of Denmark , Ris? Campus, Building 111, Frederiksborgvej 399, DK-4000 , Roskilde , Denmark |
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| Abstract: | A dielectric barrier discharge in a gas mixture of tetrafluoromethane (CF4) and O2 was used for tailoring the surface properties of nanofibrillated cellulose (NFC) films. The surface chemical composition of plasma-modified NFC was characterized by means of X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry, while surface morphology was illustrated by atomic force microscopy. Wettability was characterized through the static sessile drop method. The adhesion between NFC and polylactide (PLA) laminated films was tested by the double cantilever beam technique. As a result of atmospheric pressure plasma treatment, the water contact angle of NFC films increased and the values were comparable with those of PLA films. On the other hand, surface chemical characterization revealed inhomogeneity of the plasma treatment and limited improvement in adhesion between NFC and PLA films. Further research in this direction is required in order to enhance the uniformity of the plasma treatment results. |
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| Keywords: | adhesion compatibility contact angle hydrophobicity polylactide nanofibrillated cellulose surface roughness |
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