CNT/CNP-TiN涂层的高压静电喷涂技术制备及光吸收性能研究

Fabrication and Optical Absorption Properties of CNT/CNP-TiN Coating Prepared by High Voltage Electrostatic Spraying Technology

摘要:

以包含碳纳米颗粒(CNP)的油墨、碳纳米管(CNT)和TiN纳米粒子为原料,采用高压静电喷涂技术在铝基底上沉积了CNT/CNP-TiN涂层。研究了静电电压、喷涂高度和喷涂量对涂层光吸收性能的影响。结果表明,静电电压为9kV、喷涂高度为30mm和喷涂量为35μL时制备的CNT/CNP-TiN涂层光吸收性能最佳,在400~1400nm波长范围内的平均吸收率高达97.1%。TiN纳米粒子、CNT和CNP搭建成蜂窝状团簇,团簇间形成的几百纳米到微米级的光学腔以及团簇内的几十到几百纳米的光学腔可捕获不同波段的光,拓宽吸收带宽,并通过多次反射增强吸收。此外,TiN纳米粒子、CNT和CNP具有良好的光散射效应,且大部分散射光可被光学腔捕获,进一步提高吸收率。

Abstract:

The ink containing carbon nanoparticles (CNP), carbon nanotubes (CNT) and TiN nanoparticles were chosen as raw materials, the high voltage electrostatic spraying technology was used to deposite CNT/CNP-TiN coatings on aluminum substrate. The effects of electrostatic voltage, spraying height and spraying amount on the optical absorption properties of the coatings were studied. The results show that when the electrostatic voltage is 9kV, spraying height is 30mm and spraying amount is 35μL, CNT/CNP-TiN coating exhibits excellent optical absorption performance, and the average absorption in the range of 400~1400nm reaches 97.1%. Honeycomb clusters are constructed by TiN nanoparticles, CNT and CNP. Optical cavities of several hundred nanometers to micrometers formed between the clusters and optical cavities of several tens to several hundred nanometers within the clusters can trap lights with different wavebands, and broaden the absorption bandwidth. In addition, TiN nanoparticle, CNT and CNP have good light scattering effect, and most of the scattered light is trapped by the optical cavities, so as to further improve the absorption.