大変形せん断振動流動におけるセルロースナノファイバー分散系流体の過渡応答

抄録

In this study, we have investigated the influenced of the change in stress amplitude and flow properties of polyethylene glycol (PEG) solution as a suspending medium for Cellulose nanofiber (CNF) suspension by using large amplitude oscillatory shear (LAOS) measurement. The experiments were conducted with a stress-controlled rheometer, the frequency was fixed and the stress amplitude was varied. The applied stresses were entered at 6.0, 15, 18 Pa, and the strains were set to 2.0 8.2 24. The Lissajous curves obtained by LAOS measurement were evaluated. The effect of suspension ratio and stress of CNF suspension on LAOS measurement was investigated. the anomalous responses of strain were obtained in CNF suspension. In particular, the approximate shape of the parallelogram-like ellipse is shown for strains 2.0 and 8.2. At a strain of 24, the shape of the ellipse approached a circular shape, confirming the increased hydrodynamic effect. The above results show that the properties of the CNF suspension changed depending on the applied stress.