Modeling and predicting of the color changes of wood surface during CO2 laser modification

被引:65
|
作者
Li, Rongrong [1 ]
Xu, Wei [1 ]
Wang , Xiaodong [3 ]
Wang, Chuangui [2 ]
机构
[1] Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Jiangsu, Peoples R China
[2] Anhui Agr Univ, Sch Forestry & Landscape Architecture, Hefei 230036, Anhui, Peoples R China
[3] Laval Univ, Dept Wood & Forest Sci, Pavillon Kruger, Quebec City, PQ G1V 0A6, Canada
基金
中国博士后科学基金; 国家重点研发计划;
关键词
Green manufacturing; Laser modification; Color changes; Response surface methodology; CUTTING PARAMETERS; CHEMICAL-CHANGES; HEAT-TREATMENT; BEECH WOOD; OPTIMIZATION; FORCE;
D O I
10.1016/j.jclepro.2018.02.194
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
To adopt a greener approach, a novel thermal treatment for wood was proposed. Poplar wood surface was treated by CO2 laser and the surface color changes were evaluated by CIELAB color space. The treated and untreated surface were scanned by Epson scanner to measure lightness difference (Delta L*), red-green index difference (Delta a*) and yellow-blue index difference (Delta b*) then the total color difference (Delta E*) was calculated. The laser energy load on wood surface caused characteristic changes in the chemical component, which were determined by means of Fourier infrared spectrometer (FTIR). Response surface methodology (RSM) was used for modelling and to establish a relationship between color changes and laser modification parameters. The results showed that the feed speed, sweep width and laser power had significant effects on color changes of wood surface. The Delta E* increased with the increasing of laser power, however it decreased with increasing of feed speed and sweep width, because of the amount of heat transferring decreased with the increasing of feed speed and sweep width. The results of FTIR revealed chemical structure in the wood components, which is one of the reasons to the color changes of the wood surfaces. The established quadratic mathematical model applied to describe the relationship between color changes and laser modification parameters had a good prediction. It will be useful for selecting appropriate modification parameters to achieve desired color changes. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码:818 / 823
页数:6
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