title: Cellulose nanopaper structures of high toughness.
abstract: Cellulose nanofibrils offer interesting potential as a native fibrous constituent of mechanical performance exceeding the plant fibers in current use for commercial products. In the present study, wood nanofibrils are used to prepare porous cellulose nanopaper of remarkably high toughness. Nanopapers of different porosities and from nanofibrils of different molar mass are prepared. Uniaxial tensile tests are performed and structure-property relationships are discussed. The high toughness of highly porous nanopaper is related to the nanofibrillar network structure and high mechanical nanofibril performance. Also, molar mass correlates with tensile strength. This indicates that nanofibril fracture controls ultimate strength. Furthermore, the large strain-to-failure means that mechanisms, such as interfibril slippage, also contributes to inelastic deformation in addition to deformation of the nanofibrils themselves.
authors.affiliation: Fibre and Polymer Technology, Royal Institute of Technology, KTH, SE-100 44 Stockholm, Sweden.
authors.forename: Marielle
authors.initials: M
authors.lastname: Henriksson
authors.forename: Lars A
authors.initials: LA
authors.lastname: Berglund
authors.forename: Per
authors.initials: P
authors.lastname: Isaksson
authors.forename: Tom
authors.initials: T
authors.lastname: Lindström
authors.forename: Takashi
authors.initials: T
authors.lastname: Nishino
mesh_terms: D002482:Cellulose / Q000648:ultrastructure*; D008855:Microscopy, Electron, Scanning; D008970:Molecular Weight; D049329:Nanostructures / Q000648:ultrastructure*; D010209:Paper; D016062:Porosity; D013329:Structure-Activity Relationship; D013718:Tensile Strength; D014783:Viscosity; D014934:Wood; D014961:X-Ray Diffraction
chemical_list: D002482:Cellulose