大振幅せん断振動流におけるCNTサスペンションの流動特性

抄録

In this study, we have investigated the influence of the change in stress amplitude and the flow properties of carbon nanotube (CNT) 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 waveform and the Lissajous curves obtained by LAOS measurement were evaluated. Compared to Newtonian fluid, the anomalous responses of strain and shear rate were obtained in CNT suspension. In particular, the phase of the strain was shifted in the waveform. The slope of the shear rate increased after a flow reversal, i.e. the fluidity of CNT suspension was increased. Moreover, increasing the stress amplitude caused a change in the strain and shear rate behaviors of CNT suspension. It is suggested that the flow structure of CNT suspension was changed by increasing the stress amplitude.