PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 3, Number 2, 2017
Multi-layer nanopaper based composites Andreas Mautner (a). Jessica Lucenius (b). Monika Österberg (b). Alexander Bismarck (a,c) (a) Polymer and Composite Engineering (PaCE) Group, Faculty of Chemistry, Institute for Materials Chemistry and Research, University of Vienna, Vienna, Austria (b) School of Chemical Technology, Department of Forest Products Technology, Aalto University, Espoo, Finland (c) Polymer and Composite Engineering (PaCE) Group, Department of Chemical Engineering, Imperial College London, London, UK Native cellulose nanofibrils (CNF) were prepared from bleached birch pulp without any chemical or enzymatic pre-treatment. These CNF were modified by adsorption of a small amount of watersoluble polysaccharides and used to prepare nanopapers, which were processed into composites by lamination with an epoxy resin and subsequently cured. The results were compared to the properties of composites prepared using bacterial cellulose nanopapers, since bacterial cellulose constitutes highly pure and crystalline cellulose. It was found that both types of nanopapers significantly improved both the thermal stability and mechanical properties of the epoxy resin. As anticipated, addition of only 2 wt% of watersoluble polysaccharides efficiently hindered crack propagation within the nanopaper and significantly improved the tensile strength and work of fracture compared to composites containing a conventional nanopaper reinforcement. The mechanical properties of the composites thus reflected the improvement of the nanopaper properties by the polysaccharides. Moreover, it was possible to predict the properties of the final composite from the mechanical performance of the nanopapers.
Cellulose (2017) 24:1759 – 1773 DOI 10.1007/s10570-017-1220-2
The Paper Industry Technical Association (PITA) is an independent organisation which operates for the general benefit of its members – both individual and corporate – dedicated to promoting and improving the technical and scientific knowledge of those working in the UK pulp and paper industry. Formed in 1960, it serves the Industry, both manufacturers and suppliers, by providing a forum for members to meet and network; it organises visits, conferences and training seminars that cover all aspects of papermaking science. It also publishes the prestigious journal Paper Technology and the PITA Annual Review , both sent free to members, and a range of other technical publications which include conference proceedings and the acclaimed Essential Guide to Aqueous Coating .
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Article 5 – Nanocellulose Composites
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