Electrodeposition and Infrared Radiation Properties of Carbon Nanotube Coatings
Carbon nanotube(CNT)coatings are prepared on aluminum substrate surfaces by electrodeposition.The effects of dispersion conditions and electrodeposition conditions on the reflective properties of the coatings in visible and infrared wavelengths are investigated.The experimental results indicate that ultrasonic cavitation improves the dispersion and electrodeposition efficiency of carbon nanotube suspensions,thereby reduce the reflectivity of the coating.Scanning electron microscopy(SEM)results indicate that increasing the electrodeposition time can effectively improve the coating coverage density.At a constant voltage of 20 V,after 40 minutes of electrodeposition,carbon nanotubes fully cover the substrate surface,while the surface roughness of the coating begins to be significantly improved,and the infrared reflectance is significantly decreased.According to the infrared reflectance spectrum,carbon nanotube coatings with near-infrared reflectance less than 0.001 4 can be obtained by increasing ultrasonic time and electrodeposition time,which shows the feasibility of electrodeposition method for preparing carbon nanotube coatings.
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