Search

Preparation of antioxidant, antibacterial and UV-shielding nanocellulose films by incorporation of lignin nanoparticles, Nano24

Quantitative scanning electron microscopy characterization to determine if microfibrillated cellulose is considered a nanomaterial, Nano24

Safety Considerations for the Application of Microfibrillated Cellulose as Scaffolding for Cultured Meat, Nano24

Synergistic effects of thermomechanical pulp fibers, cellulose nanofibrils, and surfactants in fabricating high-performance insulation foams: a structure-property relationship study, Nano24

Techno-economic analysis and life cycle assessment of cellulose nanocrystal production, Nano24

The combined effects of electrolyte addition and mechanical shearing on transparent and flexible cellulose nanocrystal films, Nano24

The impact of surface functionalization of cellulose following simulated digestion and gastrointestinal cell-based model exposure, Nano24

Towards the formulation of a water-barrier coating solution for packaging applications: Strategiesfor coupling TEMPO oxidized cellulose nanofibrils(TCNFs) and gum ros, Nano24

WOOD FRACTIONATION SCALE-UP FOR SUSTAINABLE RAW MATERIALS, Nano24

Dynamic out-of-plane compression of paperboard — Influence of impact velocity on the surface, TAPPI Journal February 2024

ABSTRACT: Processes that convert paperboard into finished products include, for example, printing, where the paperboard is subjected to rapid Z-directional (ZD) compression in the print nip. However, measuring and evaluating the relevant properties in the thickness direction of paperboard are not necessarily straightforward or easy. Measuring at relevant, millisecond deformation rates further complicates the problem. The aim of the present work is to elucidate some of the influences on the compressive stiffness. Both the initial material response and the overall compressibility of the paperboard is studied. In this project, the effect on the material response from the surface structure and the millisecond timescale recovery is explored.The method utilized is a machine called the Rapid ZD-tester. The device drops a probe in freefall on the substrate and records the probe position, thus acquiring the deformation of the substrate. The probe is also allowed to bounce several times on the surface for consecutive impacts before being lifted for the next drop. To investigate the time dependent stiffness behavior, the probe is dropped several times at the same XY position on the paperboard from different heights, thus achieving different impact velocities. The material response from drops and bounces combined allows study of the short-term recovery of the material. The material in the study is commercial paperboard. The paperboard samples are compared to material where the surface has been smoothed by grinding it. Our study shows that there is a non-permanent reduction in thickness and a stiffening per bounce of the probe, indicating a compaction that has not recovered in the millisecond timescale. Additionally, a higher impact velocity has an initial stiffening effect on the paperboard, and this is reduced by smoothing the surface.