Abstract
We present a method for 3D measurement of fiber cross sectional morphology from handsheets. An automated procedure is used to acquire 3D datasets of fiber cross sectional images using an automated microtome and light microscopy. The fiber cross section geometry is extracted using digital image analysis. Simple sample preparation and highly automated image acquisition and image analysis are providing an efficient tool to analyze large samples. It is demonstrated that if fibers are tilted towards the image plane the images of fiber cross sections are always larger than the true fiber cross section geometry. In our analysis the tilting angles of the fibers to the image plane are measured. The resulting fiber cross sectional images are distorted to compensate the error due to fiber tilt, restoring the true fiber cross sectional shape. We use an approximated correction, the paper provides error estimates of the approximation. Measurement results for fiber wall thickness, fiber coarseness and fiber collapse are presented for one hardwood and one softwood pulp.
© 2018 by Walter de Gruyter Berlin/Boston
Artikel in diesem Heft
- Contents
- Towards optimal defibration: Energy reduction by fatiguing pre-treatment
- Flow conditions in the grooves of a Low-Consistency refiner
- Multiphase simulation of fiber suspension flows using immersed boundary methods
- New insights into retention aids dosage and mixing
- Mechanical retention – Influence of filler floc size and grammage of the fibre web
- Influence of the history of loading during beating on the evolution of the drainage resistance (SR)
- Numerical Investigation of Paperboard Forming
- Exceptional pore size distribution in foam-formed fibre networks
- Evaluation of the Scott bond test method
- Testing of individual fiber-fiber joints under biaxial load and simultaneous analysis of deformation
- Towards 3D analysis of pulp fibre networks at the fibre and bond levels
- 3D network simulations of paper structure
- Automated 3D measurement of fiber cross section morphology in handsheets
- The number of contacts in random fibre networks
- Modeling the rheology of nanocellulose suspensions
- Mechanical properties of cellulose nanofibrils determined through atomistic molecular dynamics simulations
- Evaluation of the stress-strain properties in the thickness direction - particularly for thin and strong papers
- Investigation of sample-size effects on in-plane tensile testing of paperboard
- Use of the efficiency factor to account for previous straining on the tensile behavior of paper
- Optical measurement of deformation of paper under tensile load
- Stress-strain curve of paper revisited
- Analysis of the plastic and elastic energy during the deformation and rupture of a paper sample using thermography
- Fibre deformations induced by different mechanical treatments and their effect on zero-span strength
- Application and interpretation of zero and short-span testing on nanofibre sheet materials
- An analytic procedure for determination of fracture toughness of paper materials
- Engineering fracture mechanics analysis of paper materials
- Time-dependent, stochastic failure of paper and box
- Simulation of creping pattern in tissue paper
- The effects of process variables for GCC pre-flocculation on floc and handsheet properties
- The effect of MFC on the pressability and paper properties of TMP and GCC based sheets
- Modeling and simulation of paperboard edge wicking
- Edge-wicking: Micro-fluidics of two-dimensional liquid penetration into porous structures
- Mass transfer of water vapor, carbon dioxide and oxygen on modified cellulose fiber-based materials
- Fluorescence model for multi-layer papers using conventional spectrophotometers
- A partial explanation of the dependence between light scattering and light absorption in the Kubelka-Munk model
- Significance of surface and bulk light scattering in microgloss and microgloss nonuniformity of coated papers: Influence of pigment characteristics and calendering conditions
- Dependence between paper properties and spectral optical response of uncoated paper
- Fold cracking of coated paper: The effect of pulp fiber composition and beating
- Effects of coating formulation on coating thermal properties and coated paper print quality in xerography
- Uniformity of liquid absorption by coatings - Technique and impact of coating composition
- Specks masking by the coating layer in coated paper made from deinked pulp
- Use of paper-making techniques for the production of Li-ion paper-batteries
- Contacting paper-based supercapacitors to printed electronics on paper substrates
- Supercapacitors with graphene coated paper electrodes
- Conductivity of inkjet-printed PEDOT:PSS-SWCNTs on uncoated papers
- Dynamics of moisture interaction with polyelectrolyte multilayers containing nanofibrillated cellulose
- Anisotropic light propagation in paper
Artikel in diesem Heft
- Contents
- Towards optimal defibration: Energy reduction by fatiguing pre-treatment
- Flow conditions in the grooves of a Low-Consistency refiner
- Multiphase simulation of fiber suspension flows using immersed boundary methods
- New insights into retention aids dosage and mixing
- Mechanical retention – Influence of filler floc size and grammage of the fibre web
- Influence of the history of loading during beating on the evolution of the drainage resistance (SR)
- Numerical Investigation of Paperboard Forming
- Exceptional pore size distribution in foam-formed fibre networks
- Evaluation of the Scott bond test method
- Testing of individual fiber-fiber joints under biaxial load and simultaneous analysis of deformation
- Towards 3D analysis of pulp fibre networks at the fibre and bond levels
- 3D network simulations of paper structure
- Automated 3D measurement of fiber cross section morphology in handsheets
- The number of contacts in random fibre networks
- Modeling the rheology of nanocellulose suspensions
- Mechanical properties of cellulose nanofibrils determined through atomistic molecular dynamics simulations
- Evaluation of the stress-strain properties in the thickness direction - particularly for thin and strong papers
- Investigation of sample-size effects on in-plane tensile testing of paperboard
- Use of the efficiency factor to account for previous straining on the tensile behavior of paper
- Optical measurement of deformation of paper under tensile load
- Stress-strain curve of paper revisited
- Analysis of the plastic and elastic energy during the deformation and rupture of a paper sample using thermography
- Fibre deformations induced by different mechanical treatments and their effect on zero-span strength
- Application and interpretation of zero and short-span testing on nanofibre sheet materials
- An analytic procedure for determination of fracture toughness of paper materials
- Engineering fracture mechanics analysis of paper materials
- Time-dependent, stochastic failure of paper and box
- Simulation of creping pattern in tissue paper
- The effects of process variables for GCC pre-flocculation on floc and handsheet properties
- The effect of MFC on the pressability and paper properties of TMP and GCC based sheets
- Modeling and simulation of paperboard edge wicking
- Edge-wicking: Micro-fluidics of two-dimensional liquid penetration into porous structures
- Mass transfer of water vapor, carbon dioxide and oxygen on modified cellulose fiber-based materials
- Fluorescence model for multi-layer papers using conventional spectrophotometers
- A partial explanation of the dependence between light scattering and light absorption in the Kubelka-Munk model
- Significance of surface and bulk light scattering in microgloss and microgloss nonuniformity of coated papers: Influence of pigment characteristics and calendering conditions
- Dependence between paper properties and spectral optical response of uncoated paper
- Fold cracking of coated paper: The effect of pulp fiber composition and beating
- Effects of coating formulation on coating thermal properties and coated paper print quality in xerography
- Uniformity of liquid absorption by coatings - Technique and impact of coating composition
- Specks masking by the coating layer in coated paper made from deinked pulp
- Use of paper-making techniques for the production of Li-ion paper-batteries
- Contacting paper-based supercapacitors to printed electronics on paper substrates
- Supercapacitors with graphene coated paper electrodes
- Conductivity of inkjet-printed PEDOT:PSS-SWCNTs on uncoated papers
- Dynamics of moisture interaction with polyelectrolyte multilayers containing nanofibrillated cellulose
- Anisotropic light propagation in paper