Constructing NFC-pigment composite surface treatment for enhanced paper stiffness and surface properties
Tóm tắt
The use of nano- or microfibrillar cellulose (NFC or MFC) in papermaking is generally hampered by high cost and potentially wasteful use in typical wet end applications. The solubility and fines nature of the material makes it inefficient to retain, and when retained it is generally inefficiently applied within the spatial distribution of the paper fibre matrix. To illustrate the benefits of capturing the important NFC in a layer structure to enhance surface and stiffness properties of paper and board, we present a study whereby NFC is entrapped at the surface of a fibrous web by forming an in situ composite using a porous coating layer, consisting in the exemplified case of modified calcium carbonate. It is shown that NFC can integrate itself within the porous structure providing excellent holdout and thin layer continuity essential in developing an efficient concentration of the NFC at the surface of the substrate. The effect is likened to the well-known I-beam construction. An additional feature is the potential for recycling the remaining fibrous content in the NFC or, more particularly, MFC product after the nanocrystalline cellulose (NCC) gel fraction has been absorbed, allowing for further efficient processing if needed and hence providing a potential cost reduction in the overall NFC/MFC production. The increased smoothness and uniformity obtained is illustrated by confocal laser profilometry and electron microscopy. The effect on permeability is also illustrated.
Tài liệu tham khảo
Araki J, Wada M, Kuga S, Okano T (1998) Flow properties of microcrystalline cellulose suspension prepared by acid treatment of native cellulose. Colloids Surf A Physicochem Eng Asp 142:75–82
Aulin C, Johannson E, Wågberg L, Lindström T (2010) Self-organized films from cellulose/nanofibrils using the layer-by-layer technique. Biomacromolecules 11(4):872–882
Bruce DM, Hobson RM, Farrent JW, Hepworth DG (2005) High performance composites from low-cost plant primary cell walls. Compos Part A Appl S 36(11):1486–1493
Cherian BM, Pothan LA, Nguyen-Chung T, Mennig G, Kottaisamy M, Thomas S (2008) A novel method for the synthesis of cellulose nanofibril whiskers from banana fibers and characterization. J Agric Food Chem 56:5617–5627
Eichhorn SJ, Dufresne A, Aranguren M, Marcovich NE, Capadona JR, Rowan SJ, Weder C, Thielmans W, Roman M, Renneckar S, Gindl W, Veigel S, Keckes H, Yano H, Abe K, Nogi M, Nakagaito AN, Mangalam A, Simonsen J, Benight AS, Bismarck A, Berglund LA, Peijs T (2010) Review: current international research into cellulose nanofibres and nanocomposites. J Mater Sci 45:1–33
Fukuzumi H, Saito T, Iwata T, Kumamoto Y, Isogai A (2009) Transparent and high barrier films of cellulose nanofibers prepared by tempo-mediated oxidation. Biomacromolecules 10:162–165
Gardener DJ, Oporto GS, Mills R, Samir MASA (2008) Adhesion and surface issues in cellulose and nanocellulose. J Adhes Sci Technol 22:545–567
Gisella U, Laufmann M (2010) Surface filling of woodfree paper with ground calcium carbonate. In: XXI TECNICELPA conference/VI CIADICYP 2010, Lisbon
Hamada H, Bousfield DW (2010) Nano-fibrillated cellulose as a coating agent to improve print quality of synthetic fiber sheets. In: TAPPI 11th advanced fundamentals symposium, Munich, TAPPI, Atlanta
Hassan EA, Hassan ML, Oksman K (2011) Improving Bagasse pulp paper sheet properties with microfibrillated cellulose isolated from Xylanase-treated. Bagasse Wood Fiber Sci 43(1):76–82
Henriksson M, Henriksson G, Berglund LA, Lindström T (2007) An environmentally friendly method for enzyme-assisted preparation of microfibrillated cellulose (MFC) nanofibers. Eur Polym J 43:3434–3441
Henriksson M, Berglund LA, Isaksson P, Lindström T, Nishino T (2008) Cellulose nanopaper structures of high toughness. Biomacromolecules 9(6):1579–1585
Herrick FW, Casebier RL, Hamilton JK, Sandberg KR (1983) Microfibrillated cellulose: morphology and accessibility. J Appl Polym Sci 37(9):797–813
Hult E-L, Iotti M, Lenes M (2010) Efficient approach to high barrier packaging using microfibrillar cellulose and shellac. Cellulose 17:575–586
Klemm D, Kramer F, Moritz S, Lindström T, Ankerfors M, Gray D, Dorris A (2011) Nanocelluloses: a new family of nature-based materials. Angew Chem Int Ed 50(24):5438–5466
Moerseburg K, Chinga-Carrasco G (2009) Assessing the combined benefits of clay and nanofibrillated cellulose in layered TMP-based sheets. Cellulose 16(5):795–806
Nakagaito AN, Yano H (2005) Novel high—strength biocomposites based on microfibrillated cellulose having nano-order-unit web-like network structure. Appl Phys A Mater 80(1):155–159
Paakko M, Ankerfors M, Kosonen H, Nykänen A, Ahola S, Österberg M, Ruokolainen J, Laine J, Larsson PT, Ikkala O, Lindström T (2007) Enzymatic hydrolysis combined with mechanical shearing and high-pressure homogenization for nanoscale cellulose fibrils and strong gels. Biomacromolecules 8(6):1934–1941
Rees LH (1974) Evaluating homogenizers for chemical processing. Chem Eng 13:86–92
Ridgway CJ, Schoelkopf J, Gane PAC (2003) A new method for measuring the liquid permeability of coated and uncoated papers and boards. Nord Pulp Paper Res 18(4):377–381
Saito T, Isogai A (2007) Preparation of cellulose single microfibrils from native celluloses by TEMPO-mediated oxidation. Cellul Commun 14(2):62–66
Saito T, Nishiyama Y, Putaux JL, Vignon M, Isogai A (2006) Homogeneous suspensions of individualized microfibrils from TEMPO-catalyzed oxidation of native cellulose. Biomacromolecules 7(6):1687–1691
Syverud K, Stenius P (2009) Strength and barrier properties of microfibrillar cellulose (MFC) films. Cellulose 16(1):75–85
Turbak AF, Snyder FW, Sandberg KR (1983) Microfibrillated cellulose, a new cellulose product: properties, uses, and commercial potential. J Appl Polym Sci 37:815–827
Wygant RW, Kendrick J, Walter J (2008) Metered size press pigmentation for fiber reduction. In: TAPPI PaperCon ‘08 conference, Dallas