Abstract
Abstract We prepared carbon nanotube (CNT) suspensions with a fixed CNT concentration dispersed in N-methyl-2-pyrrolidone containing a dispersion agent to study dispersion stability of CNTs. Surface morphology and thickness of the CNT films fabricated via spin-coating were measured by an optical microscope and high-resolution scanning electron microscope, respectively. Furthermore, light transmittance measurements were performed using a transmission densitometer. Rheological behaviors measured using a rotational rheometer showed that while the ball-milled CNT suspensions showed better dispersion stability compared to the ‘pre-milling’ suspension, the dispersion stability depended on the milling time, with the effectiveness decreasing when the time increased above an optimal value.
Published Version
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