G0400304 Investigating Time Dependent Mechanical Properties of Cellulose Nanofibres Sheets

Abstract

In this study, time dependent mechanical properties of Celish sheets which have the potential to be used as acoustic speaker diaphragms produced from cellulose nanofibers were investigated. Specimens of Celish sheets with/without halloysite were investigated by using ramp-hold tensile tests. The stress-time curves of ramp-hold tensile tests show that Celish sheets with/without halloysite are time dependent materials and Celish sheet with halloysite have lower elastic moduli and larger relaxation constants. The time dependent mechanical behavior of Celish sheet was described by using the linear viscoelastic constitutive model with one time constant and the averaged stress time curves used obtaining the optimized parameters of linear viscoelastic model.