Title :
A Note on the Influence of Pretreatment on the Photodiscoloration by UV Light as a Function of Energy of Wood
Author :
Guo, Minghui ; Guan, Xin
Author_Institution :
Key Lab. of Bio-Based Mater. Sci. & Technol. of Minist. of Educ., Northeast Forestry Univ., Harbin, China
Abstract :
The effect of the pretreatment by acid and bleacher on color changes and FT-IR spectra of wood surfaces of B. platyphylla due to irradiation has been examined. To monitor the relationship, L*, a*, b*, △E* parameters and FT-IR spectra of samples´ surface were analyzed quantitatively by spectrophotometer and FT-IR at the different irradiation time. Irradiation time was altered between 24, 48, 72, 96 and 120 h. Our findings showed that acid treatment promoted photo-discoloration and bleaching treatment enhanced the lightness value and b* value. The changes of the surface colors were related to carbonyl compounds, phenolic hydroxyl, paraquinones, ortho quinine and so on.
Keywords :
Fourier transform spectra; bleaching (materials processing); colour; infrared spectra; photochemistry; wood; wood processing; B. platyphylla; FTIR spectra; UV light; acid treatment; bleaching treatment; carbonyl compounds; lightness value; ortho quinine; paraquinones; phenolic hydroxyl; photodiscoloration; time 0 h to 120 h; wood surfaces; Application software; Bleaching; Chemical analysis; Color; Condition monitoring; Forestry; Humidity; Materials science and technology; Surface treatment; Temperature;
Conference_Titel :
Bioinformatics and Biomedical Engineering (iCBBE), 2010 4th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-4712-1
Electronic_ISBN :
2151-7614
DOI :
10.1109/ICBBE.2010.5515379
