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Preprocessing of Carbon Nanotube Dispersion for Productive Spray Coating
Duckjong Kim(김덕종),Lijing Zhu(주려청) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
Several methods have been proposed and used for the fabrication of thin films of carbon nanotubes (CNTs). Among them, the spray coating method is a robust approach for large area fabrication, but clogging in the spray nozzle is a critical problem hindering stable and controlled coating process. In this study, we investigate the effect of exsitance of microparticles in the multi-walled CNT (MWCNT) solution on the clogging problem. We checked repeatability in the flow rate through the spray nozzle using various CNT solutions with different average particle number. We also checked the effect of the particle number on the concentration and stability of the CNT solution. From the experimental data, we found that 2 min-centrifugation is appropriate in the process of MWCNT solution preparation for stable and productive spray process.