Your search resulted in 40 documents. Displaying 25 entries per page.
Critical parameters on moisture dynamics in relation to time of wetness as factor in service life prediction
2014 - IRG/WP 14-20555
The concept of natural durability or enhanced durability based on the presence of active ingredients having an impact on both fungi and insects is not the only parameter steering the material resistance. Complementary resistance to getting wet (wetting ability) and consequently the ease of drying afterwards will lead to a parameter related to the time a piece of wood will remain under such wet con...
J Van Acker, I De Windt, W Li, J Van den Bulcke
Effects of thermal modification on properties of Douglas-fir heartwood
2014 - IRG/WP 14-40663
The flexural properties and mass losses of thermal modified Douglas-fir pretreated with boron or glycerol were examined. Pretreatments were associated with slight, but not significant, reductions in modulus of rupture (MOR) and modulus of elasticity （MOE）of Douglas-fir at different thermal treatment levels. Boron pretreatment had the greatest effect on MOR. MOR of non-pretreated and ...
Li Yan, J J Morrell
The potential of 2D NIR imaging for wood protection research
2015 - IRG/WP 15-20566
Investigating wood and wood-based materials using infrared spectroscopy has since long been explored. Recently, image-based systems have been developed that are used in food and pharmaceutical industries for rapid screening. Such hyperspectral cameras are able to collect spatial and spectral information simultaneously, resulting in a volume with a spectral profile for each pixel of the image. We p...
J Van den Bulcke, N Defoirdt, W Li, J Van Acker
Non-destructive monitoring of structure and moisture dynamics of plywood exposed outdoors to improve service life prediction and fit-for-purpose design
2015 - IRG/WP 15-20570
Plywood is an important construction material yet prone to water uptake, which can decrease strength and increase decay risk. To predict service life and improve fit-for-purpose design, it is crucial to understand the moisture behavior and structural changes of plywood. In this research, several plywood specimens were exposed outdoors for approximately one year. During this period, the moisture di...
W Li, J Van den Bulcke, I De Windt, M Dierick, J Van Acker
Durability of a willow/plastic composite mat
2016 - IRG/WP 16-20592
Developing uses for wood wastes could enhance utilization of low value renewable materials while creating opportunities for rural development. Small diameter willow stems have little use in China, but they could be combined with high density polyethylene to create wood plastic composite mats for decorative applications. These mats could be used in exterior, above ground exposures, but would still ...
Li Yan, Haiyan Duan, Beizhan Quan, J Cappellazzi, J J Morrell
Dynamic mechanical analysis of viscoelastic properties of heat treated glycerol-impregnation poplar wood
2016 - IRG/WP 16-40732
The viscoelastic properties of glycerol-impregnated poplar wood after heat treatments at various temperatures were examined by dynamic-mechanical analysis. The spectra of storage modulus (E’) and loss tangent (tgδ) in the frequency at 10 Hz were measured at the temperature range from -100 to 300℃. Compared to no peak in E’ spectra and two relaxation processes in tanδ spectra of...
Li Yan
Anti-fungal activity of rutin and rutin-metal complexes as wood protectants
2017 - IRG/WP 17-30708
The anti-fungal activity of Rutin, a flavonoid, alone or complexed with copper or zinc was investigated in a petri dish test with Gloeophyllum trabeum and Trametes versicolor as the test fungi. Rutin and the Rutin-metal complexes showed significant inhibition against each fungus. Rutin-Cu and Rutin-Zn strongly inhibited the brown rot fungus, G. trabeum, while Rutin and Rutin-Zn inhibited T. versic...
Li Yan, J J Morrell, Jie Zhong, Xiuzhu Mao
Permeability of Eucalyptus wood improved by microwave treatment
2017 - IRG/WP 17-40773
The wood species with low permeability may cause many problems during timber manufacturing. Extreme difficulties take place in fabricating new wood-based composites by impregnating low- permeability timber with functional materials, such as flame retardant, preservatives and resins. Microwave (MW) treatment can increase the permeability of wood both in transverse and longitudinal directions. The e...
Xia He, Xianjun Li, Jie Xie, Xingyang Xiong
Controlled deposition of copper nanoparticles using wood inherent architecture as natural template
2017 - IRG/WP 17-40783
As one of the most abundant renewable biomass resources, wood can be used as templates for synthesizing functional nanoparticles with controlled shapes and sizes. In this study, copper nanoparticles were synthesized with controlled shapes and sizes using poplar wood as the natural inexpensive and renewable templates. The crystal structure and morphologies of the copper nanoparticles were character...
Youming Dong, Kaili Wang, Yutao Yan, Jianzhang Li, M Hughes, Shifeng Zhang
Multiscale modification on water resistance and dimensional stability of Populus cathayana by alkali lignin combined with heat treatment
2018 - IRG/WP 18-40826
The aim of this study was to enhance the water resistance and dimensional stability of fast growing wood by alkali lignin combined with heat treatment. Poplar (Populus cathayana) samples were first impregnated with alkali lignin solution and then subjected to heat treatment at 140, 160, and 180°C respectively for 2h. Properties of leachability, moisture adsorption and water absorption, contact an...
H Zhou, J Li, E Ma
Facile in-situ growth of Ag-TiO2 nanoparticles on polydopamine modified bamboo with excellent mildew-proofing
2019 - IRG/WP 19-30734
Bamboo with good mechanical properties, fast growth rate and low growth cost is one of very utilitarian structural material from forest resources only less important than wood. But it is especially easy to mildew during outdoor service resulting in appearance mould scattering and corrosion. In this work, a facile method was developed to increased mildew-proofinging capability of bamboo. Mussel-ins...
J Hu, Z Lu, G Liu, S Chang, Y Liu, X Li
Wood veneer with high flexible decorated with nanoparticles for highly efficient water treatment
2019 - IRG/WP 19-50347
Natural wood is mainly comprised of numerous long, partially aligned channels (lumens) as well as nanochannels. Wood with these quick and effective passages is suitable for a membrane/separation material. However, a suitable thickness range of wood along its growth direction is essential to effectively separate small molecular, and the wood membrane is too thick to clean easily. In this paper, woo...
S Chang, D Xu, G Liu, J Hu, X Li, Y Liu
X-ray fluorescence microscopy of copper ion distribution in decay of copper-treated wood by Fibroporia radiculosa
2024 - IRG/WP 24-11047
Copper is an essential metal ion for eukaryotic life and must strictly be regulated as excess levels can cause oxidative damage, enzyme inhibition and denaturation, interruptions in nutrient transport and even cellular death. Copper-based wood treatments have efficacy against a wide range of biological organisms including decay fungi and are used in the majority of preservative formulations for ou...
K M Ohno, J Jakes, A B Bishell, L Li, Q Jin, E Maxey
Manufacturing of bamboo hybrids with high strength, superior fire retardancy, and dimensional stability
2024 - IRG/WP 24-30808
Bamboo, renowned for its rapid growth, high strength-to-weight ratio, and eco-friendly attributes, has found extensive use in decorative building materials and glue-laminated beams. However, the inherent challenges of dimensional instability and flammability in natural bamboo restrict its broad application. This research introduces a range of environmentally friendly techniques aimed at producing ...
W He, Rui Wang, W Li, G Hu, T Singh, Q Fu
Outdoor termite resistance performance of zinc borate (Borogard® ZB) treated parallel strand lumber (PSL) – 15 years field test results
2024 - IRG/WP 24-40999
This report discloses the outdoor termite resistance performance of PSL samples treated with zinc borate at a dosage of 0.85% BAE and 1.72% BAE in Wuxi, China. The outdoor field trial lasted for 15 years and observations were made after 6 months, 3 years, 5 years 1 month, 6 years 6 months and 15 years. The retaining rates of B2O3 and ZnO in the final samples were also tested, and the hypothesis wa...
S Shi, E Laval, K Lung, F Ascherl, R Williams, W Li, X Li