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绿色植被近红外光谱模拟材料的设计及应用

Design and Application of Simulation Material of Green Vegetation Spectrum in NIR Interval

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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1450 nm和1940 nm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NO3-、Cl-、CO32-、SO42-),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

The reflectance spectrum of fresh plant leaves in the near infrared has been systematically analyzed. It is verified that presence of O-H is the key to those vegetation′s spectral characteristics at about 1450 nm and 1940 nm. Based on the knowledge, Mg-Al-X-LDH (X represents NO3-, Cl-, CO32-, SO42-), four types of novel spectral simulation materials containing interlayed O-H, were designed and prepared, and their X-ray diffraction patterns, infrared spectra, thermogravimetric curves and Raman spectra were characterized. The model calculation results of spectral correlation mapper and spectral angle mapper show similarities more than 0.9600 and 0.9700 between four types of layered double hydroxides (LDHs) and plant leaves in near infrared reflectance spectrum. The polyurethane coating with Mg-Al-Cl-LDHs as a simulation material exhibits a highly coincided spectrum with that of plant leaves, and similarities of two calculation models are up to 0.9702 and 0.9924, respectively. The similarities calculation of reflectance spectra for Mg-Al-Cl-LDHs before and after calcining at 180 ℃ are still up to 0.9888 and 0.9959, indicating high thermo stability of Mg-Al-LDHs.

Newport宣传-MKS新实验室计划
补充资料

中图分类号:O433.4;O611.64;TN213

DOI:10.3788/aos201737.0230004

所属栏目:光谱学

基金项目:中联科技新材料联合实验室资助项目(2013-B-03)、江苏高校优势学科建设工程资助项目

收稿日期:2016-08-24

修改稿日期:2016-10-13

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作者单位    点击查看

王 晶:南京航空航天大学材料科学与技术学院, 江苏 南京 211106
李 澄:南京航空航天大学材料科学与技术学院, 江苏 南京 211106
刘 朗:南京航空航天大学材料科学与技术学院, 江苏 南京 211106
郑顺丽:南京航空航天大学材料科学与技术学院, 江苏 南京 211106
项腾飞:南京航空航天大学材料科学与技术学院, 江苏 南京 211106
杨 玲:南京航空航天大学材料科学与技术学院, 江苏 南京 211106

联系人作者:王晶(dezhouwangjing2ll@126.com)

备注:王 晶(1990-),女,硕士研究生,主要从事特征光谱材料方面的研究。

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引用该论文

Wang Jing,Li Cheng,Liu Lang,Zheng Shunli,Xiang Tengfei,Yang Ling. Design and Application of Simulation Material of Green Vegetation Spectrum in NIR Interval[J]. Acta Optica Sinica, 2017, 37(2): 0230004

王 晶,李 澄,刘 朗,郑顺丽,项腾飞,杨 玲. 绿色植被近红外光谱模拟材料的设计及应用[J]. 光学学报, 2017, 37(2): 0230004

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