Home About Browse Search
Svenska


Natural Weathering and Photostability of Wood Modified by Fatty Acid Esters

Jebrane, Mohamed and Terziev, Nasko and Heinemaa, Ivo (2018). Natural Weathering and Photostability of Wood Modified by Fatty Acid Esters. I/In: 9th European Conference on Wood Modification ECWM9, September 17 and 18, 2018, Arnhem, The Netherlands.
[Conference Paper]

[img] PDF
641kB

Abstract

Polyunsaturated fatty acid vinyl ester was synthesized via a transition-metal catalyzed transvinylation reaction between vinyl acetate and fatty acids from Tung oil. The ensuing fatty acid vinyl ester (vinyl α-eleostearate) was characterized by FTIR and NMR spectral analyses and used as reactive reagent for modification of wood veneers. The covalent grafting of polyunsaturated fatty acid moieties onto the wood was achieved through transesterification reaction between wood hydroxyl groups and fatty acid vinyl ester. The transesterification reaction was confirmed by FTIR, 13C CP MAS NMR spectroscopy and the level of modification was estimated by determining the weight percentage gain (WPG). The photostability of modified wood veneers was evaluated by exposing wood veneers to natural weathering in Uppsala (Sweden) during April-May 2018. Upon 5 weeks of exposure to natural weathering, unmodified wood showed quick color changes and degradation of lignin, while modification of wood vinyl α-eleostearate was very effective in suppressing light-induced color changes at wood surfaces.

Authors/Creators:Jebrane, Mohamed and Terziev, Nasko and Heinemaa, Ivo
Title:Natural Weathering and Photostability of Wood Modified by Fatty Acid Esters
Year of publishing :2018
Number of Pages:6
Publisher:Practicum
Language:English
Publication Type:Conference Paper (UNSPECIFIED)
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Wood Science
Keywords:α-eleostearic acid, chemical modification, fatty acid, photostability, vinyl ester, weathering, wood
URN:NBN:urn:nbn:se:slu:epsilon-p-98629
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-98629
ID Code:24602
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology
(S) > Dept. of Forest Products (until 180101)
Deposited By: SLUpub Connector
Deposited On:21 Jun 2021 14:52
Metadata Last Modified:12 Aug 2021 08:32

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits