Spectroscopy and Spectral Analysis, Volume. 42, Issue 1, 56(2022)
A Qualitative and Quantitative NIRs Study on Larch Wood Surface Color Change by UV Light Irradiation
Figures & Tables(6)
Fig. 1. The NIRs second derivative spectra of larch wood with and without ultraviolet light irradiation
(a): 7 100~5 450 cm-1; (b): 5 000~4 000 cm-1
Fig. 2. The NIRs difference spectrum (dotted line) and Second-derivative spectra (solid lines) of without and with ultraviolet light irradiation of 1 080 h
(a): 7 100~5 450 cm-1; (b): 5 000~4 000 cm-1
Fig. 3. Correlation between colorimetric parameters values
Table 1. Chromaticity parameters of larch wood with and without ultraviolet light irradiation
View tableView in ArticleTable 1. Chromaticity parameters of larch wood with and without ultraviolet light irradiation
紫外老化时间 L* a* b* ΔE* 未处理 72.01 11.29 23.74 - 180 h 53.61 19.57 33.96 22.62 540 h 49.04 21.07 33.97 26.98 900 h 42.78 20.88 27.73 31.02 1 080 h 39.19 19.66 23.00 33.88
Table 2. Assignment of representative absorption bands in Larch wood
View tableView in ArticleTable 2. Assignment of representative absorption bands in Larch wood
No. 波数/cm-1 吸收带归属 文献 a 6 996 1st OT. O—H str./纤维素非结晶区 [8] b 6 773 1st OT. O—H str./纤维素半结晶区 [9] c 6 287 1st OT. O—H str./纤维素结晶区 [8] d 5 986 1st OT. C—H str.木质素芳香环骨架 [9] e 5 800 1st OT. C—H str./半纤维素的呋喃和吡喃 [8] f 4 852~4667 O—H str.+C—H def./纤维素结晶区或半结晶区 [9] g 4 404 O—H str.+C—H2 def./纤维素和半纤维素 [8] h 4 281 C—H str.+C—H def.纤维素和半纤维素、 木聚糖 [8] i 4019 C—H str.+C-C str./纤维素 [8]
Table 3. Detailed parameters of color prediction models of larch wood
View tableView in ArticleTable 3. Detailed parameters of color prediction models of larch wood
参数 预处理方法 光谱范围/cm-1 维数 RMSEC RMSECV RPDC RPDV L* 矢量归一+
一阶导数+
多元散射校正6 102~4 598
5 450~4 598
4 602~4 24710 0.970 8 0.948 8 2.14 2.68 5.85 4.42 a* 一阶导数 5 450~4 598
6 102~5 4469 0.954 2 0.928 0 0.878 1.04 4.67 3.73 b* 一阶导数 5 450~4 247
6 102~5 4469 0.9448 0.831 0 1.31 2.18 4.26 2.43
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Rui-yun FU, Xiao-hui FU, Wen-bo ZHANG, Dong-qing LI, Cheng GUAN, Hou-jiang ZHANG. A Qualitative and Quantitative NIRs Study on Larch Wood Surface Color Change by UV Light Irradiation[J]. Spectroscopy and Spectral Analysis, 2022, 42(1): 56
Paper Information
Category: Research Articles
Received: Nov. 30, 2020
Accepted: --
Published Online: Mar. 31, 2022
The Author Email: Rui-yun FU (458334147@qq.com)
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