1 Department of Wind Energy, Technical University of Denmark2 Composites and Materials Mechanics, Department of Wind Energy, Technical University of Denmark3 Department of Energy Conversion and Storage, Technical University of Denmark4 Imaging and Structural Analysis, Department of Energy Conversion and Storage, Technical University of Denmark5 Department of Chemical and Biochemical Engineering, Technical University of Denmark6 The Danish Polymer Centre, Department of Chemical and Biochemical Engineering, Technical University of Denmark7 Risø National Laboratory for Sustainable Energy, Technical University of Denmark8 Department of Management Engineering, Technical University of Denmark
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.
Journal of Adhesion Science and Technology, 2013, Vol 27, Issue 3, p. 294-308