Effect of cellulose nanofiber dimensions on sheet forming through filtration
- 1.1k Downloads
Four different cellulose nanofibers samples were prepared from northern bleached softwood kraft fibers. Fiber diameter distributions were measured from SEM images. Fiber aspect ratios ranging from 84 to 146 were estimated from fiber suspension sedimentation measurements. Three samples had heterogeneous distributions of fiber diameters, while one sample was more homogeneous. Sheet forming experiments using filters with pores ranging from 150 to 5 μm showed that the samples with a heterogeneous distribution of fiber dimensions could be easily formed into sheets at 0.2% initial solids concentration with all filter openings. On the other hand, sheets could only be formed from the homogenous sample by using 0.5% or more initial solids content and a lower applied vacuum and smaller filter openings. The forming data and estimated aspect ratios show reasonable agreement with the predictions of the crowding number and percolation theories for the connectivity and rigidity thresholds for fiber suspensions.
KeywordsCellulose nanofiber Nanofiber length Sedimentation Nanofiber sheets
The authors thank Sally Gras, The University of Melbourne, for SEM images of pulp NIST-1 and Dr. Emily Perkins, Stoney Lei Wang, Ryan Lee, Siti Ibrahim, Azreen Omar, Wei Wei, Yi Mei Chew and Hong Yoong Tai for experimental assistance. Liyuan Zhang also thanks IDP Education Australia Ltd. for the IDP Student Mobility Scholarship, and Swambabu Varanasi thanks Monash University for a MGS Scholarship.
- Ampulski RS (2001) Report of investigation reference materials 8495 Northern Softwood Bleached Kraft 8496 Eucalyptus Hardwood Bleached Kraft. National Institute of Standards and Technology Gaithersburg, MDGoogle Scholar
- Dunham AJ, Sherman LM, Alfano JC (2002) Effect of dissolved and colloidal substances on drainage properties of mechanical pulp suspensions. J Pulp Pap Sci 28(9):298–304Google Scholar
- Eichhorn S, Dufresne A, Aranguren M, Marcovich N, Capadona J, Rowan S, Weder C, Thielemans W, Roman M, Renneckar S, Gindl W, Veigel S, Keckes J, Yano H, Abe K, Nogi M, Nakagaito A, Mangalam A, Simonsen J, Benight A, Bismarck A, Berglund L, Peijs T (2010) Review: current international research into cellulose nanofibres and nanocomposites. J Mater Sci 45(1):1–33. doi: 10.1007/s10853-009-3874-0 CrossRefGoogle Scholar
- Janarthanan S, Sain M (2006) Isolation of cellulose micro fibrils—an enzymatic approach. Bioresources 1(2):176–188Google Scholar
- Martinez DM, Buckley K, Jivan S, Lindstrom A, Thiruvengadaswamy R, Olson JA, Ruth TJ, Kerekes RJ (2001) Characterizing the mobility of papermaking fibres during sedimentation. In: Baker CF (ed) The science of papermaking: transactions of the 12th fundamental research symposium, Oxford. The Pulp and Paper Fundamental Research Society, Bury, UK, pp 225–254Google Scholar
- Raisanen KO, Paulapuro H, Karrila SJ (1995) The effects of retention aids, drainage conditions, and pretreatment of slurry on high-vacuum dewatering—a laboratory study. TAPPI J 78(4):140–147Google Scholar
- Taniguchi T, Okamura K (1998) New films produced from microfibrillated natural fibres. Polym Int 47(3):291–294. doi: 10.1002/(sici)1097-0126(199811)47:3<291:aid-pi11>3.0.co;2-1 CrossRefGoogle Scholar
- Tunç S, Duman O (2011) Preparation of active antimicrobial methyl cellulose/carvacrol/montmorillonitenanocomposite films and investigation of carvacrol release. LWT–Food Sci Technol 44(2):465–472Google Scholar
- Xu L, Parker I (2000) Simulating the forming process with the moving belt drainage former. Appita J 53(4):282–286Google Scholar
- Zhang LY, Tsuzuki T, Wang XG (2010) Preparation and characterization on cellulose nanofiber film. Mater Sci Forum 654–656:1760–1763Google Scholar