The Impact of Surface Charges of Carboxylated Cellulose Nanofibrils on the Water Motions in Hydrated Films
Valentina Guccini, Shun Yu, Zhoujun Meng, Eero Kontturi, F. Demmel, Germán Salazar‐Alvarez
Abstract
surface charges take up twice the amount of moisture per unit mass, leading to the formation of nanostructures with an average radius of gyration of 2.1 nm. Via the nondestructive quasi-elastic neutron scattering (QENS), a faster motion is explained as a localized movement of water molecules inside confined spheres, and a slow diffusive motion is found with the diffusion coefficient close to bulk water at room temperature via a random jump diffusion model and regardless of the surface charge in films made from CNFs.
Topics & Concepts
Quartz crystal microbalanceMaterials scienceSmall-angle X-ray scatteringRadius of gyrationSurface chargeChemical physicsChemical engineeringCelluloseComposite materialMoistureAdsorptionDiffusionNeutron scatteringScatteringPolymer chemistryPolymerChemistryPhysical chemistryThermodynamicsOpticsEngineeringPhysicsAdvanced Cellulose Research StudiesPolysaccharides and Plant Cell WallsLignin and Wood Chemistry