發(fā)布時間：2018-02-20 00:34

  本文關鍵詞： 光譜學 近紅外區(qū) 層狀雙金屬氫氧化物 反射光譜 涂層　出處：《光學學報》2017年02期 　論文類型：期刊論文

【摘要】：通過對綠色植被近紅外區(qū)反射光譜的系統(tǒng)分析,充分證明O-H決定植被在1450nm和1940nm附近的光譜特征,在此基礎上,設計并制備了4種層間含O-H的新型光譜模擬材料Mg-Al-X-LDH(X為NO_3-、Cl-、CO_3~(2-)、SO_4~(2-)),并對其進行了X射線衍射、紅外光譜、熱重分析及拉曼光譜表征。依據光譜相關系數和光譜角度匹配模型計算,4種層狀雙金屬氫氧化物(LDH)與植物葉片近紅外反射光譜兩種計算模型的相似度分別超過0.9600和0.9700;以Mg-Al-Cl-LDH為模擬材料,初步與聚氨酯復合,制備了與植被在近紅外區(qū)光譜高度相似的涂層,兩種計算模型的相似度分別達到0.9702和0.9924;Mg-Al-Cl-LDH在紫外可見光區(qū)的高度透明性,有利于各個波段光譜材料的復合;經180℃高溫處理前后的Mg-Al-Cl-LDH,兩種計算模型的相似度依然能達到0.9888和0.9959,說明Mg-Al-LDH有良好的熱穩(wěn)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，

本文編號：1518347