含水率变化对三种木材色度学参数的影响
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摘要
为揭示含水率变化对古夷苏木、筒状非洲楝和水曲柳三种木材色度学参数的影响,采用CIE(1976)L~*a~*b~*标准色度学系统及均匀颜色空间对试样材色进行测量,结果表明:三种木材明度随含水率的增大均呈现逐渐下降的趋势。随含水率的增大,三种木材的色调分别表现为古夷苏木从R(红)逐渐变为Y(黄),筒状非洲楝由YR(黄红)色变为Y(黄),水曲柳由R(红)最后变为YR(黄红)。古夷苏木和筒状非洲楝的色饱和度随含水率的变大而逐渐变小,水曲柳则先略微增加后下降至平稳。三种木材的红绿轴色品指数a~*和黄蓝轴色品指数b~*在不同含水率条件下变化规律各异。研究结果为含水率变化对三种木材表面视觉性质影响的综合评价及其加工利用提供了理论依据。
In order to reveal the influence of moisture content change on chromaticity parameters of Guibourtia tessmannii, Entandrophragma cylindricum and Fraxinus mandshurica, using the CIE(1976) L~* a~* b~* standard colorimetric systems and color difference meter to measure the sample color. The result showed that the brightness of three kinds of wood decreases with the increase of moisture content. Along with the increase of moisture content, the tones of G. tessmannii gradually change from R to Y, E. cylindricum gradually change from YR to Y, F. mandshurica change from R to YR finally. The saturation of G. tessmannii and E. cylindricumgradually decreases with the increase of moisture content. The saturation of F. mandshurica first increases and then decreases to steady. The a~* and b~* of three kinds of wood show different change rules under different moisture content. These results provide a theoretical guide for the comprehensive evaluation, processing and utilization of influence of moisture content change on chromaticity parameters of three kinds of decorative wood.
In order to reveal the influence of moisture content change on chromaticity parameters of Guibourtia tessmannii, Entandrophragma cylindricum and Fraxinus mandshurica, using the CIE(1976) L~* a~* b~* standard colorimetric systems and color difference meter to measure the sample color. The result showed that the brightness of three kinds of wood decreases with the increase of moisture content. Along with the increase of moisture content, the tones of G. tessmannii gradually change from R to Y, E. cylindricum gradually change from YR to Y, F. mandshurica change from R to YR finally. The saturation of G. tessmannii and E. cylindricumgradually decreases with the increase of moisture content. The saturation of F. mandshurica first increases and then decreases to steady. The a~* and b~* of three kinds of wood show different change rules under different moisture content. These results provide a theoretical guide for the comprehensive evaluation, processing and utilization of influence of moisture content change on chromaticity parameters of three kinds of decorative wood.
引文
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[19]Chen Y,Fan Y,Gao J,et al.Coloring characteristics of in situ lignin during heat treatment[J].Wood Science and Technology,2012,46(1):33-40.
[2]Dagbro O,Torniainen P,Karlsson O,et al.Colour responses from wood,thermally modified in superheated steam and pressurized steam atmospheres[J].Wood Material Science&Engineering,2010,5(3-4):211-219.
[3]Huang X,Kocaefe D,Kocaefe Y,et al.Study of the degradation behavior of heat-treated jack pine(Pinus banksiana)under artificial sunlight irradiation[J].Polymer Degradation&Stability,2012,97(7):1197-1214.
[4]Nemeth R,Tolvaj L,Bak M,et al.Colour stability of oil-heat treated black locust and poplar wood during short-term UV radiation[J].Journal of Photochemistry&Photobiology A Chemistry,2016,329:287-292.
[5]刘一星,李坚.木材材色与森林地理分布的关系[J].东北林业大学学报,1993(4):41-46.
[6]Fan Y M,Gao J M,Chen Y.Colour responses of black locust(Robinia pseudoacacia L.)to solvent extraction and heat treatment[J].Wood Science and Technology,2010,44(4):667-678.
[7]Vanclay J K,Henson M,Palmer G.Color variation and correlations in Eucalyptus dunnii sawnwood[J].Journal of Wood Science,2008,54(6):431-435.
[8]Calienno L,Monaco A L,Pelosi C,et al.Colour and chemical changes on photodegraded beech wood with or without red heartwood[J].Wood Science&Technology,2014,48(6):1167-1180.
[9]TOLVAJ,László,NéMETH,et al.Correlation Between Hue-angle and Colour Lightness of Steamed Black locust Wood[J].Acta Silvatica&Lignaria Hungarica,2008,4:55-60.
[10]何拓,罗建举.20种红木类木材颜色和光泽度研究[J].林业工程学报,2016,1(2):44-48.
[11]李坚,董玉库.木材的视觉环境学特性[J].中国木材,1992(2):24-27.
[12]刘一星,于海鹏.透明涂饰对木材纹理等视觉特征的影响分析[J].林业科学,2006,42(12):90-94.
[13]佐道健.机器にょる测定值から视觉值への换算:L*、a*、b*表色系からマソセへの变换[J].木材工业,1985(1):12-40.
[14]侯新毅,姜笑梅,殷亚方.从色度学参数研究3种桉树木材的透明涂饰性能[J].林业科学,2006,42(8):57-62.
[15]Tolvaj L,Persze L,Lang E.Correlation between Hue Angle and lightness of wood species grown in Hungary[J].Wood Research,2013,58(1):141-145.
[16]Klement I,Marko P.Colour changes of beech wood(Fagus sylvatica L.)during high temperature drying process[J].Wood Research,2009,54(3):45-54.
[17]陈瑶.木材热诱发变色过程中发色体系形成机理[D].北京:北京林业大学,2012.
[18]张鹏,高建民,樊永明.落叶松在饱和蒸汽条件下热诱发变色过程[J].林产工业,2013,40(3):30-33.
[19]Chen Y,Fan Y,Gao J,et al.Coloring characteristics of in situ lignin during heat treatment[J].Wood Science and Technology,2012,46(1):33-40.