Your search resulted in 7 documents.
Mechanical and chemical properties of blue stained wood
2009 - IRG/WP 09-10686
Discoloration of wood is frequently caused by blue-staining fungi. In the previous researches there was general opinion that blue-stain fungi do not influence mechanical properties. On the other hand, there were some opposite results reported as well. In order to elucidate this issue, specimens made of Pinus sylvestris sapwood were exposed to two the most frequent and important blue stain fungi Au...
M Humar, V Vek, B Bučar
Changes in mechanical and chemical properties of wood exposed outdoors
2014 - IRG/WP 14-20550
The aim of this study was to investigate differences in certain mechanical and chemical properties of three different wood species (common beach (Fagus sylvatica), Norway spruce (Picea abies), and copper-ethanolamine (CuE) impregnated Norway spruce (Picea abies)) that were exposed in use class 3 (CEN, 2006) for periods between 4 and 30 months. The results show, that changes in the investigated me...
N Thaler, C Brischke, D Žlindra, V Vek, M Humar
Material Resistance and Chemical Composition of Italian Stone Pine (Pinus pinea)
2018 - RG/WP 18-20645
Relevant properties of stone pine (Pinus pinea) wood have been only fragmentarily addressed in the past, which has been recognized as a limiting factor for its potential applications. The amount of the respective wood species on the market will likely increase in the future. The sorption properties, permeability to water, extractives content and durability against fungi of Pinus pinea sapwood and ...
M Humar, M De Angelis, M Romagnoli, V Vek, I Poljanšek, P Oven, N Thaler, B Lesar, D Kržišnik
Impregnation of wood with antifungal compounds from low-quality tree biomass
2022 - IRG/WP 22-30763
In this paper we have reviewed recent research on the development of bio-based preservative formulations for wood done at the Department of wood science and technology, Ljubljana. Preservative formulations used in this investigation were prepared using plant polyphenols as biocidal agents. These nonstructural components of wood were stilbenes and flavonoids, and were extracted from wood of broken ...
V Vek, I Poljanšek, A Balzano, M Humar, P Oven
Chemical modification of cellulose nanofibrils for tailoring properties of composites
2022 - IRG/WP 22-40934
Due to its natural abundance, complete biodegradability and excellent properties, cellulose is one of the most promising materials for the production of bio composites, as well as one of the most promising fillers for biodegradable polymer composites. This is also true for nanocellulose. A large number of hydroxyl groups on the surface of fibers or fibrils enables a whole series of chemical reacti...
I Poljanšek, J Levanič, V Ž Bogataj, V Vek, P Oven
Biocomposites based on PVA, cellulose nanofibrils and tannic acid
2022 - IRG/WP 22-40957
Biocomposite films based on a polyvinyl alcohol (PVA) with the addition of cellulose nanofibrils (CNF) as a reinforcing component and with the addition of the biologically active tannic acid (TA) were prepared. The influence of different additions of CNF and TA in the polymer matrix PVA on the mechanical properties, improvement of hydrophobicity of the prepared films was studied. In all cases, the...
U Osolnik, V Vek, I Poljanšek, Poven
Optimisation of accelerated weathering procedure as an alternative to natural weathering
2023 - IRG/WP 23-20693
Comprehensive tests need to be performed to obtain the most accurate data possible on the durability of wood. The most reliable performance tests are field tests. However, since this is very time-consuming, we frequently rely on laboratory tests. To increase the reliability of the laboratory tests, samples are preconditioned with natural or artificially accelerated weathering methods that simulate...
E Keržič, M Humar, V Vek