绿色植被近红外光谱模拟材料的设计及应用

发布时间：2018-02-20 00:34

  本文关键词： 光谱学 近红外区 层状双金属氢氧化物 反射光谱 涂层　出处：《光学学报》2017年02期 　论文类型：期刊论文

【摘要】：通过对绿色植被近红外区反射光谱的系统分析,充分证明O-H决定植被在1450nm和1940nm附近的光谱特征,在此基础上,设计并制备了4种层间含O-H的新型光谱模拟材料Mg-Al-X-LDH(X为NO_3-、Cl-、CO_3~(2-)、SO_4~(2-)),并对其进行了X射线衍射、红外光谱、热重分析及拉曼光谱表征。依据光谱相关系数和光谱角度匹配模型计算,4种层状双金属氢氧化物(LDH)与植物叶片近红外反射光谱两种计算模型的相似度分别超过0.9600和0.9700;以Mg-Al-Cl-LDH为模拟材料,初步与聚氨酯复合,制备了与植被在近红外区光谱高度相似的涂层,两种计算模型的相似度分别达到0.9702和0.9924;Mg-Al-Cl-LDH在紫外可见光区的高度透明性,有利于各个波段光谱材料的复合;经180℃高温处理前后的Mg-Al-Cl-LDH,两种计算模型的相似度依然能达到0.9888和0.9959,说明Mg-Al-LDH有良好的热稳定性,不易失水。
[Abstract]:Based on the systematic analysis of the reflectance spectra in the near infrared region of green vegetation, it is fully proved that O-H determines the spectral characteristics of vegetation near 1450nm and 1940nm. Four novel spectral simulation materials containing O-H between layers, Mg-Al-X-LDH(X, were designed and prepared. Thermogravimetric analysis and Raman spectroscopic characterization. The similarity between the four layered double hydroxide LDHs and the near infrared reflectance spectra of plant leaves is more than 0.9600, respectively, according to the spectral correlation coefficient and the spectral angle matching model. And 0.9700; using Mg-Al-Cl-LDH as a simulation material, The coating which is similar to the vegetation in the near infrared region was prepared. The similarity of the two models reached 0.9702 and 0.9924 Mg-Al-Cl-LDH in the ultraviolet and visible region, respectively, which was beneficial to the composite of the spectral materials in each band. After high temperature treatment at 180 鈩，

本文编号：1518347