碳纳米管涂层的电沉积制备及其红外辐射性能研究

Electrodeposition and Infrared Radiation Propertiesof Carbon Nanotube Coatings

通过电沉积法在铝衬底表面制备碳纳米管(Carbon Nanotubes,CNT)涂层,研究了分散液的分散条件和电沉积条件对可见光及红外波段涂层反射特性的影响。实验结果表明,超声空化作用提高了碳纳米管悬浊液的分散性和电沉积效率,进而降低涂层反射率。扫描电镜(SEM)结果表明,增加电沉积时间可有效提高涂层覆盖密度。在20 V恒压下,电沉积40分钟后碳纳米管充分覆盖于衬底表面,同时涂层表面的粗糙度开始明显提高,红外反射率显著降低。根据红外反射率光谱,通过增加超声时间和电沉积时间,可得到近红外反射率小于0.0014的碳纳米管涂层,证明电沉积法制备碳纳米管涂层的可行性。

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 0.0014 can be obtained by increasing ultrasonic time and electrodeposition time,which shows the feasibility of electrodeposition method for preparing carbon nanotube coatings.