Advanced infrared emission coating materials with emissivities close to one unit are critical for producing high-performance standard black bodies. Herein, by utilizing a simple spray-coating method, we prepared a novel carbon-based coating with an organic binder by using VC 811-21 as the main phase and multiwall carbon nanotubes (MWCNTs) as the dopant to fulfil this demand. The addition of an optimal concentration of MWCNTs results in a smooth surface structure with a low roughness that is free of large granularities. The infrared emissivity in the wavelength region of 6.5–16 µm presents a close dependence on the increasing concentration of MWCNTs. With 1‰ MWCNTs, the highest infrared emissivity in vacuum (0.985) is obtained with a spectral nonuniformity of 0.002, and this result is higher than the reported values of VC 811-21 and other well-known infrared coating materials. Such high infrared emissivity will greatly benefit the design of novel black bodies for next-generation infrared remote sensing.

发射率接近一个单位的高级红外发射涂料对于生产高性能标准黑体至关重要。在本文中，通过使用简单的喷涂方法，我们以VC 811-21为主要相，并以多壁碳纳米管（MWCNT）为掺杂剂，制备了一种新型的有机粘合剂碳基涂料，以满足这一需求。最佳浓度的MWCNT的添加导致具有低粗糙度，没有大颗粒的光滑表面结构。波长范围为6.5–16 µm的红外发射率与不断增加的MWCNT浓度密切相关。使用1‰MWCNT，可获得真空中的最高红外发射率（0.985），光谱不均匀度为0.002，该结果高于VC 811-21和其他知名的红外涂料的报道值。如此高的红外发射率将大大有益于下一代红外遥感的新型黑体的设计。