碳纳米管的多光谱兼容衰减特性研究

Investigation on Multiband Attenuation Compatibility of Carbon Nanotubes

重点研究碳纳米管的紫外-可见-红外多光谱兼容衰减特性。在傅里叶变换红外光谱、紫外-可见光谱分析、激光散射、电子显微镜（SEM）等现代分析技术的基础上阐述了碳纳米管的添加剂、质量浓度、结构与多光谱兼容衰减特性的密切联系，并探讨了调控多光谱衰减的新原理和新技术。结果表明，不同结构和浓度的碳纳米管流体的紫外-可见光谱差别很大。质量浓度为0．04g·L^-1时，粒径为30-50nm的碳纳米管样品在265nm紫外衰减的消光系数为7．825m2·g，透光度为4．4％，紫外吸收光谱衰减为90％以上。验证了样品吸光度和碳纳米管的质量浓度是线性相关的。该碳纳米管在红外光谱范围的兼容衰减特性良好，碳纳米管薄膜厚度为0．1imm时，测量光路中碳纳米管的质量为0．349mg，粒径为30～50nm碳纳米管与液体石蜡复合样品在4.0～6．25μm和7．0～16．7μm红外吸收光谱衰减在90％以上。

The present investigation was focused on how to realize the attenuating compatibility of the electromagnetic defilade material in UV-Vis-Infrared band. Optical spectra of CNTs was investigated on the basis of analytical technologies such as Fourier transform infrared spectroscopy, UV-Vis spectrophotometer, laser scattering, and electron microscopy. It was demon- strated that the multi-band attenuation characteristic of CNTs is effectively associated with additives, concentrations and configurations. The measured sample with a concentration of 0. 04 g ·L^-1, in which the radius of CNTs was 30-50 nm, bore the maxi mum value of the extinction coefficient of 7. 825 m2 ·g^-1 at the point of 265 nm Meanwhile, this kind of CNTs presents outstanding unified attenuation properties in infrared wave band. when the thickness of the CNTs film is 0. 1 mm and the total mass of CNTs is 0. 349 mg in optical path. Especially, the unified attenuation goes beyond 90% in 4. 0-6, 25 and 7.0-16. 7μm