文献类型：会议论文

英文题名：Effect of Heat Treatment Temperature on the Color of Okan Wood

作者：Shi, Qiang[1] Bao, Fucheng[1] Lu, Jianxiong[1] Jiang, Jinghui[1]

第一作者：Shi, Qiang

通信作者：Shi, Q[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing, Peoples R China

会议论文集：International Conference on Key Engineering Materials

会议日期：MAR 25-27, 2011

会议地点：Sanya, PEOPLES R CHINA

语种：英文

外文关键词：Cylicodiscus spp; heat treatment; wood color

年份：2011

摘要：In this study the effect of high temperature on color change of okan wood was investigated. Wood specimens were subjected to heat treatment at 160 degrees C, 180 degrees C,200 degrees C,220 degrees C for 4 hours with the superheated steam as a heating medium and a shielding gas. Color changes were measured in the Minolta Croma-Meter CR-300 color system. The color parameters L*, a*, b* were determined by the CIEL*a*b* method on the surface of untreated and treated wood, and their variation with regard to the treatment (Delta L*, Delta a*, Delta b*) were calculated. It was found that heat treatment resulted in a darkening of wood tissues, Color became dark with the temperature increases. The darkening accelerated when treatment temperature exceeded approximately 200 degrees C. We found that heat treatment temperature were substantially important regarding the color responses. Strong correlations between total color difference and the treatment temperature were found. The effect of treatment temperature on color change in sapwood is more obvious than that in heartwood, the color of sapwood and heartwood tended to be more uniform when the temperature reaches more than 200 degrees C.