izpis_h1_title_alt

Effects of UV light irradiation on colour stability of thermally modified, copper ethanolamine treated and non-modified wood : EPR and DRIFT spectroscopic studies
Deka, Manabendra (Author), Humar, Miha (Author), Rep, Gregor (Author), Kričej, Borut (Author), Šentjurc, Marjeta (Author), Petrič, Marko (Author)

URLURL - Presentation file, Visit http://www.springerlink.com/content/b1n00p9715330686/fulltext.pdf This link opens in a new window

Abstract
A series of experiments were carried out to investigate the colour stability of chemically treated and thermally modified wood compared to non-modified wood during long term artificial UV light irradiation. One set of wood samples was vacuum-pressure impregnated with alkaline (pH 9.8) copper (II) ethanolamine aqueous solution, while another set of samples from the same woodblock was thermally modified at 210C and -0.90 bar for 2 h. The treated and modified wood samples along with the non-modified ones were exposed to artificial UV light with the wave length in the region of UVA (315-400 nm) and UVB (280-315 nm) intermittently for 500 h. Colour measurements were carriedout throughout the irradiation period at an interval of 100 h accordingto CIEL*a*b* system, where the results are presented in terms of ?E, ?L*, ?a* and ?b* values. Better photo-stability in terms of colour changes was recorded for both treated and modified woods compared to the non-modified one. By means of EPR and DRIFT spectroscopic study it was shown that some degree of colour stability of treated and modified woods, achieved during artificial UV light irradiation, resulted from lignin modifications and monomers of phenolic compounds.

Language:English
Keywords:wood, thermal modification, colour, EPR spectroscopy
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:BF - Biotechnical Faculty
Year:2008
Number of pages:str. 5-20
Numbering:Vol. 42, no. 1
UDC:674.04
ISSN on article:0043-7719
COBISS.SI-ID:1513353 Link is opened in a new window
Views:534
Downloads:101
Metadata:XML RDF-CHPDL DC-XML DC-RDF
 
Average score:(0 votes)
Your score:Voting is allowed only to logged in users.
:
Share:AddThis
AddThis uses cookies that require your consent. Edit consent...

Record is a part of a journal

Title:Wood Science and Technology
Shortened title:Wood Sci. Technol.
Publisher:Springer
ISSN:0043-7719
COBISS.SI-ID:9151749 This link opens in a new window

Similar documents

Similar works from RUL:
Similar works from other Slovenian collections:

Comments

Leave comment

You have to log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back