Characteristics Of Wood Research Articles

RELATIONSHIP BETWEEN WOOD ANATOMICAL FEATURES AND SURFACE ROUGHNESS CHARACTERISTICS

This study aimed to investigate the relationship between surface roughness and anatomical features of wood in 15 different species of boards. Surface roughness was measured parallel and perpendicular to the wood grain using a surface profilometer, and anatomical features such as pore size and distribution were analyzed using microscopic techniques. The results showed that surface roughness perpendicular to the grain direction was consistently higher than that parallel to the grain direction for all wood samples. This difference in roughness was correlated with pore size and density. It shows that the larger pores and lower density lead to higher roughness perpendicular to the grain. The study also found that traditional hand planning methods (push and pull) produced a smooth surface finish, with no statistical differences in roughness.

Potential of machine learning approaches for predicting mechanical properties of spruce wood in the transverse direction

To predict the mechanical properties of wood in the transverse direction, this study used machine learning to extract the anatomical features of wood from cross-sectional stereograms. Specimens with different orientations of the ray parenchyma cell were prepared, and their modulus of elasticity (MOE) and modulus of rupture (MOR) were measured by a three-point bending test. The orientation of the ray parenchyma cell and wood density (rho ) were used as parameters for the MOE and MOR prediction. Conventional machine learning algorithms and artificial neural network were used, and satisfactory results were obtained in both cases. A regular convolutional neural network (CNN) and a density-informed CNN were used to automatically extract anatomical features from the specimens’ cross-sectional stereograms to predict the mechanical properties. The regular CNN achieved acceptable but relatively low accuracy in both the MOE and MOR prediction. The reason for this may be that rho information could not be satisfactorily extracted from the images, because the images represented a limited region of the specimen. For the density-informed CNN, the average prediction coefficient for both the MOE and MOR drastically increased when rho information was provided. A regression activation map was constructed to understand the representative anatomical features that are strongly related to the prediction of mechanical properties. For the regular CNN, the latewood region was highly activated in both the MOE and MOR prediction. It is believed that the ratio and orientation of latewood were successfully extracted for the prediction of the considered mechanical properties. For the density-informed CNN, the activated region is different. The earlywood region was activated in the MOE prediction, while the transition region between the earlywood and latewood was activated in the MOR prediction. These results may provide new insights into the relationship between the anatomical features and mechanical properties of wood.

Исследования характеристик пожарной опасности паркетов исторических объектов с массовым пребыванием людей

Introduction. To find out the influence of historical parquet floor on the safe evacuation of people in cultural heritage objects, it is necessary to carry out a mathematical modelling of fire hazard propagation with the initial parameters of the existing combustible load. The purpose of the article is to consider the experimentally derived fire hazard characteristics of historical wood compared to the required values for flooring on evacuation routes and in museum halls. To compare the values of the smoke-developed index and the net heat of combustion with those available in the reference literature. M aterials and methods . To study the fire hazard characteristics of historical floor coverings, the dies of existing parquet floor with a service life of about 160 years in the halls of the Winter Palace at the State Hermitage Museum were selected as specimens. Experimental determinations of the indicators were carried out on the appropriate test equipment using standard methods. Results and discuss ion. Analysis of the results of the research shows that the fire hazard characteristics of historical wood do not meet the legally established requirements for floor coverings in halls in terms of their smoke-forming capacity and flammability, and in corridors and foyer halls in terms of their smoke-forming capacity . The smoke-forming capacity values obtained experimentally differ from the reference values used to calculate the dynamics of the build-up of the DFF in the buildings of museums and exhibitions. In addition, the values of the net heat of combustion obtained in the study differ from those given in the reference literature. Conclusions. An estimation of the results of the carried out research and the available indexes in the reference literature allows to assert necessity of carrying out of scientific experiments for definition of characteristics of fire hazard of wood of historical objects with the purpose of formation of the reference database of characteristics of fire hazard of materials, used in museums, located in palaces — objects of cultural heritage. The use of refined reference data will improve the accuracy of calculations of individual fire risk on historical objects.

Universal strategy for constructing antibioadhesive and robust coatings for wood

The demand for surface antibioadhesion of wood, the most widely used material for interiors, has increased due to health concerns. For achieving antibioadhesion, the surface energy of wood materials must be reduced and their micro/nanostructure roughness must be increased. Inspired by lotus leaves, poly(pentafluorophenyl isocyanide) (PFPI)-grafted wood (wood-g-PFPI) with micro/nanostructure roughness and low surface energy was developed by grafting PFPI into the wood structure at the molecular level via thiol–ene click chemistry. The chemical structure, morphology, and water contact angle of wood-g-PFPI were characterized via Fourier transform infrared spectroscopy, solid-state 13C nuclear magnetic resonance spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and contact angle measurements. Wood-g-PFPI10 exhibited excellent hydrophobicity (162°), antibacterial adhesion (Staphylococcus aureus and Escherichia coli), antifriction as well as self-cleaning properties, and biocompatibility owing to the increased surface roughness of the ring helical structure of the grafted PFPI. This method makes full use of the molecular characteristics of wood, so it can also be transferred to all the cellulosic substrates, such as fabric, paper and so on. Regardless of the size and space constraints of the substrate, this modification method has the potential for antibioadhesion and other applications of helical polymers.

Host plant selection by Cerambycidae in two different strata in association with seasonality and physical wood characteristics in a tropical dry forest

Abstract1. There is little information on tropical dry forests regarding cerambycids and their relationship with seasonality, vertical stratification, and physical characteristics of the wood they require to develop.2. In this work, we determined whether cerambycids in a tropical dry forest of central Mexico differed in the selection of oviposition sites in two different strata throughout two seasons; the relationship between the time of exposure of branches and the emergence of cerambycids; the emergence of these insects in relation to the physical characteristics of the wood and its relationship with stratification and seasonality; and if there was a seasonal shift between strata by cerambycids. Branch segments from 81 woody plant species were cut and exposed to allow the cerambycids to oviposit; the branches were harvested in four 2‐month periods and placed in emergence chambers. For each plant species, we measured the density, decomposition rate, and offered volume of wood.3. There was a greater quantity of generalist species of stratum (15) and season (12), and we found six important habitat indicator species: three species were significantly associated with the canopy and the dry season, two species preferred the dry season but not strata, and one species preferred both strata in the dry season and the ground during the rainy season. Cerambycid species generally selected soft and ephemeral wood resources.4. Branch selection by cerambycids in Central Mexico is not random choice; it is determined by season, stratum, density, and especially by host type, decomposition, and volume. Finally, there is a greater abundance of cerambycids in the ground and a greater richness of species in the canopy.

Physical and chemical properties of wood from <i>Eucalyptus</i> and <i>Corymbia</i> clones in different planting densities

The present work aimed to evaluate some technological characteristics of the wood of two commercial hybrid clones of Eucalyptus spp and two hybrid clones of Corymbia spp, implanted in three different planting spacings, at 24 months of age. Four trees per clone were sampled at each spacing to determine the following wood characteristics: basic density, gross calorific value, energy density and cellulose, hemicellulose, lignin, ash and carbon contents. There was a significant effect of the clone x spacing interaction for the basic density, energy density, lignin and cellulose contents of the wood. Eucalyptus showed the highest levels of lignin and cellulose, and hybrid clones of Corymbia the highest values of basic density and energy density of wood, with emphasis on clone C3, where the highest averages of the study were verified. For the levels of hemicelluloses and ash in the wood, the clone effect and spacing effect were observed. As for the carbon content and the gross calorific value in the wood, there was no significant effect, either from the clone, the spacing or the interaction of these two factors. The results show that there is variability in the characteristics between the genetic materials evaluated and in relation to the planting spacing tested. It should be noted that the choice of the best genetic material should be based on the technological characteristics of the wood, but also the forest productivity associated with good silviculture of the species should be evaluated.

Cell wall response of field grown Populus to Septoria infection.

Due to its ability to spread quickly and result in tree mortality, Sphaerulina musiva (Septoria) is one of the most severe diseases impacting Populus. Previous studies have identified that Septoria infection induces differential expression of phenylpropanoid biosynthesis genes. However, more extensive characterization of changes to lignin in response to Septoria infection is lacking. To study the changes of lignin due to Septoria infection, four field grown, naturally variant Populus trichocarpa exhibiting visible signs of Septoria infection were sampled at health, infected, and reaction zone regions for cell wall characterization. Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), and acid hydrolysis were applied to identify changes to the cell wall, and especially lignin. FTIR and subsequent principal component analysis revealed that infected and reaction zone regions were similar and could be distinguished from the non-infected (healthy) region. NMR results indicated the general trend that infected region had a higher syringyl:guaiacyl ratio and lower p-hydroxybenzoate content than the healthy regions from the same genotype. Finally, Klason lignin content in the infected and/or reaction zone regions was shown to be higher than healthy region, which is consistent with previous observations of periderm development and metabolite profiling. These results provide insights on the response of Populus wood characteristics to Septoria infection, especially between healthy and infected region within the same genotype.

A Mediterranean woody species composition from Late Miocene-Early Pliocene deposits of northeastern Turkey with newly described fossil-taxa palaeoclimatically evaluated

We describe new fossil woods of Late Miocene – Early Pliocene age from Northeastern Turkey and discuss the woody flora with respect to palaeoclimate and palaeovegetation. Three different wood species, Cedrus anatolica Akkemik, Cistoxylon cistoides Akkemik & Mantz. sp. nov. and Phillyreoxylon phillyreoides Akkemik & Mantz. sp. nov. were identified. Among these fossil angiosperm species, C. cistoides is the only second fossil species of this genus described in the world. P. phillyreoides is the first fossil wood form assigned to Phillyrea L. The wood anatomical features of the described fossil angiosperm species, along with their palaeoclimatic evaluation using vulnerability and mesomorphy ratios and conductive capability sensu Carlquist, showed xeromorphic characteristics similar to the wood features of their modern representatives growing in Mediterranean conditions. The woody plant composition and xeromorphic characteristics of the woods suggest that northeastern Anatolia housed Mediterranean floristic elements in the Late Miocene-Early Pliocene.

Species with larger vessel area have higher bias for the original Granier equation in calculating sap flux density

Accurate estimate of transpiration is crucial to understanding global water and carbon cycles. The thermal dissipation (TD) method with Granier’s equation, which is the most popular approach to measure whole-tree water use, requires species-specific calibration parameters to calculate transpiration. Calibrations require direct measurement of water uptake, often through gravimetric or potometric methods; therefore, it is often disregarded because of limited time and resources. It remains unclear which factor influences the variation of calibration parameters. In this study, we compiled published calibration experiments to elucidate the factors that could influence the variation in coefficients and attempted to predict the correction parameter. The results showed that: (1) only 14 % of the experiments provided accurate sap flux density estimates using the default parameter values in the Granier’s equation, and sap flux was underestimated to varying degrees in 72% of the experiments; (2) the regression slope of TD-measured and the actual sap flow with the y-axis intercept set to zero (hereinafter referred to as “Slope”) was significantly correlated to the mean vessel area (VA), i.e., species with larger VA consistently had higher Slope and greater bias. Stem diameter also had a positive influence on the Slope after accounting for covariation with the VA. Finally, a multiple linear regression model based on these two characteristics (VA and stem diameter) explained 89% of the variation of Slope. This study provides a simple calibration procedure for the users of TD-sensors with a linear correction model based on easily measurable vessel area and stem diameter. It may also provide a new development avenue for sensor manufacturers or others to improve the TD method to reduce its sensitivity to wood characteristics – or provide some “out-of-the-box” correction factors across a range of wood characteristics.

Kinetic studies on photo-degradation of thermally-treated spruce wood during natural weathering: Surface performance, lignin and cellulose crystallinity

The hygroscopic behavior of wood-based materials is undoubtedly influential on the material surfaces exposed to climatic conditions. The paper aims to kinetically investigate the photo-degradation and surface characteristics of thermally-treated spruce wood at 185 °C and un-treated (reference) sample through 2 years of natural weathering. Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) spectroscopy and X-ray diffraction (XRD) were employed to investigate the chemical changes occurred in lignin and crystalline structure of cellulose as a function of outdoor exposure. Detailed measurements of morphological and surface changes were evaluated during exposing periods. Surface wettability and roughness as well as cracks were increased for all samples due to weathering as the exposure time extended. Prominently, the color changes (ΔE) and photo-chemical reactions were found to be negligible in short-time weathering thanks to thermal modification. In the long–term exposing, more OH-bonds caused by lignin leaching out resulted in presence of cracks and the affinity for water on reference sample. Degree of crystallinity significantly decreased by 12.7% in thermally treated wood and 18.3% in reference sample after long-term weathering while, the crystallinity index of thermally-treated wood increased to 4.7% in 6-month weathering. Hence, the amorphous structures and chromophores groups appeared on the reference wood at a faster and more intense rate during exposing time. Thermal treatment delayed photo-yellowing as well as color change of wood due to up-graded lignin and cellulose crystallinity through a photo-stable structure. Accordingly, kinetic studies ascertained the service-time of wood products in exterior uses.

Host specificity and association of Cerambycidae with the physical characteristics of the wood of trees in a tropical dry forest

AbstractFew studies test the host specificity of tropical dry forest cerambycids, in this study, we examined the host preferences of the cerambycids of a tropical dry forest in central Mexico and the association of cerambycid richness and abundance with the physical characteristics of the wood of their host plants. Branch segments of 81 species of woody plants were cut and left exposed to allow cerambycids oviposition, and the branches were collected and placed in emergence chambers. We measured the density, decomposition rate, and volume of wood for each branch segment. Fifty‐seven species of cerambycids emerged. We categorized the cerambycids by the degree of host specificity: 23% were generalists, 14% were specialists, and for 63% of the data were insufficient to determine specificity. For the first time we report, for the tropical dry forest, preference patterns between Cerambycidae (subfamilies and species) and their host plants (families and species). Physical characteristics of wood, such as density and decomposition rate, were strongly related to the presence of cerambycids. Cerambycidae in this forest use wood resources that decompose at an intermediate rate and are relatively soft. The cerambycids were most often generalists, and specific cerambycid/tree species associations were rare, but close commensal relationships were found at the level of subfamilies and plant families. Cerambycid richness and abundance depend on the type of host, medium decomposed woods, and the great abundance of each individual host in the area.

Effect of age on heartwood proportion, color, chemical composition, and biological resistance of teakwood

Teakwood from fast-growth plantations is commercialized at increasingly younger ages for economic reasons. However, wood features are influenced by the age of the tree. This study examined how age affects heartwood proportion, color parameters, chemical composition, and natural teakwood durability. Trees with 5, 10, 15, and 20 years of fast-growth at commercial plantations located in Mato Grosso, Brazil were evaluated. The base diameter of the trees ranged from 13.1 (5 years) to 28.3 cm (20 years), and the heartwood percentage increased from 16.3 to 60.0%, respectively. The color parameters in the CIELab system indicated that wood became darker and more saturated, and the predominance of yellow color decreased compared with red as age advanced. The total extractive content ranged between 7.4 (5 years) and 9.6% (15 years), without a clear trend of age affecting the extractive content. The extractives from five-year-old wood were mainly composed of tectoquinone (43.3%), phthalic acid (19.1%), and 1,3-indandione (9.2%), while those from 20-year-old wood were mainly composed of tectoquinone (60.7%), lapachol (13.8%), and phthalic acid (9.7%). Teakwood can be classified as resistant (5 years) to very resistant (20 years) after being submitted to an accelerated decay test.

Multivariate Image Analysis Applied to Cross-Laminated Timber: Combined Hyperspectral Near-Infrared and X-ray Computed Tomography

Engineered wood products, such as cross-laminated timber (CLT), are becoming more popular in the designs of modern sustainable buildings. This increased production of CLT requires more robust, yet less labour-intensive means to assess the material characteristics of whole CLT panels. In exploring ways of improving efficiency, this study explores multivariate image analysis (MIA) via partial least squares discriminant analysis (PLS-DA) machine learning as a means to classify CLT material features. CLT panels underwent nondestructive testing using near-infrared (NIR) hyperspectral imaging and X-ray computed tomography (CT) analysis. MIA was performed on these results to build predictive models for wood features, such as fibre alignment and knot type. The models showed that it was possible to classify material features on the surface of CLT using NIR alone; whilst when combined with X-ray data, it enhanced the predictive ability of material features throughout the CLT volume. These first results from such modelling have the potential to help map the chemical and physical material properties of CLT, improving the manufacturing efficiency of the product and allowing greater sustainability of engineered wood products.

Improvement of Heat Release Rate Measurement from Woods Based on Their Combustion Products Temperature Rise

Heat release rate (HRR) is the principal fire characteristic of materials. There are three known methods for the measurement of HRR (based on oxygen consumption, mass loss rate, and combustion products temperature rise). The method based on oxygen consumption is considered to be the reference. However, this method is expensive and for a large part of laboratories and universities unavailable. The simplest method is based on combustion products’ temperature rise. However, this method has a fundamental problem with the temperature dependence of the heat capacity of combustion products and the thermal inertia of the measurement system. This problem has been solved by training neural networks to predict molar heat capacity and the amount of substance (chemical amount) flow rate of combustion products in the cone calorimeter exhaust duct. Data were obtained for six different wood species: birch (Betula verrucosa Ehrh.), oak (Quercus robur L.) spruce (Picea abies (L.) H. Karst.), locust (Robinia pseudoacacia L.), poplar (Populus nigra × P. maximowiczii L.), and willow (Salix alba L.) woods at heat fluxes from 25 to 50 kW m−2 have been used for neural network training. Data from three other wood species iroko (Milicia excelsa (Welw.) C.C. Berg), pine (Pinus sylvestris L.), and paulownia (Paulownia tomentosa (Thunb.) Steud.) woods have been used for testing of trained neural network. The average percentage ratio of the predicted to the true value of HRR (during the test) has been 103.8%. In addition to that, some key average fire characteristics of wood have been determined: critical heat flux 20.7 kW m−2, effective heat of combustion 14.01 MJ kg−1, and the average value of molar heat capacity of combustion products 0.045 kJ mol−1 K−1.

Effect of Fibre Orientation on the Bond Properties of Softwood and Hardwood Interfaces

Increasing concerns regarding carbon emissions and climate change are prompting a shift toward the use of sustainable materials in the construction industry. Engineered timber products are gaining attention in the construction industry due to advancements in lamination techniques and adhesives as well as the renewable characteristics of wood. Bond properties play a significant role in engineered timber products. In Australia, Radiata Pine (RP, softwood) and Shining Gum (SG, hardwood) share a large proportion of local and native plantation forest resources. The present paper investigates the bond behaviours of Australian softwoods (RP–RP), hardwoods (SG–SG) and hybrid-wood (RP–SG) combinations in both parallel (PAL) and perpendicular (PER) bonding directions using one-component polyurethane adhesives. The results indicate that most of the softwood samples were subjected to wood-side (timber) failure, whereas hardwood samples failed due to delamination but exhibited higher strength and stiffness regardless of bond direction. In contrast, bond direction had a significant effect on the bond characteristics of hybrid configurations. Improved bond properties were observed when bonded in PAL directions; however, negative effects were seen when bonded in PER directions. Obtained characteristic (5th percentile) shear bond strengths for RP–RP–PAL, RP–SG–PAL and SG–SG–PAL samples were 3.88 MPa, 6.19 MPa and 8.34 MPa, whilst those for RP–RP–PER, RP–SG–PER and SG–SG–PER samples were 3.45 MPa, 2.96 MPa and 7.83 MPa, respectively.

Color and Chemical Composition of Timber Woods (Daniellia oliveri, Isoberlinia doka, Khaya senegalensis, and Pterocarpus erinaceus) from Different Locations in Southern Mali

Wood characteristics and properties are related to various factors connected to the biochemical processes that occur in the tree during wood formation, but also, to the interactions with the environmental conditions at the tree growing location. In addition to climatic factors, several investigations drew attention to the significance of the influence of other environmental parameters at the tree growing location. In this perspective, this work aimed to characterize the variation in color and chemical composition of timber wood from different locations in southern Mali, of trees growing under the same climatic conditions. To do so, a total of 68 grounded wood samples, from 4 timber wood species (Daniellia oliveri, Isoberlinia doka, Khaya senegalensis, and Pterocarpus erinaceus), were analyzed using CIELab color space and FTIR-ATR. Overall, the results indicated that the variation in wood color and chemical properties can be related to the local environmental conditions. Pterocarpus erinaceus presented significant differences between samples from the three areas according to the highest number of variables (color parameters, molecular composition determined by FTIR-ATR spectroscopy, and FTIR-ATR ratios). Daniellia oliveri and Khaya senegalensis, however, showed significant differences between areas of provenance for a lower number of variables. Isoberlinia doka, for its part, showed no significant differences and seems to be less sensitive to environmental factors. Furthermore, the results revealed that important differences exist between wood samples from Kati and Kéniéba.

Application of Fuzzy Theory to the Investigation of Children’s Preference for Wooden Toy Materials—A Case Study of Rocking Horses

This study aims to investigate the sensory preferences of children aged 8–12 regarding the material and characteristics of wooden toys. Taking wooden rocking horses as research samples, this study selected three types of wood, respectively Pinus taiwanensis, Fagus sylvatica, and Juglans nigra, which are significantly different in appearance from solid wood commonly used to make wooden toys. The experiment was conducted through on-site observation and questionnaire surveys to record children’s preferences for wood characteristics, such as the characteristic factors of wood texture, color and luster, touch, weight, smell, and overall preference. Descriptive statistics and analysis were performed using SPSS 25V, and the experimental results were analyzed and interpreted using fuzzy trigonometric functions. The findings reveal that Taiwan pine had the highest average worth score among the various evaluation characteristics in terms of wood surface performance preferences. Other types of wood also showed different favorability results in different characteristics. This study also analyzes the correlation and significant differences in favorability evaluation using fuzzy theory. This study provides insights that can be useful for toy designers and children’s teaching aid developers to purchase and match wooden toys effectively while promoting the efficient use of wood resources.

Fast-Growing Wood-Polymer Nano Composite Characteristics through Nano-SiO2 Impregnation

Ganitri (Elaeocarpus sphaericus (Gaertn.) K. Schum.) and jabon (Anthocephalus cadamba) are fast-growing wood species that have low strength and durability class. One of methods for improving the characteristics of ganitri and jabon woods is impregnation. This study objectives were to analyze the effect of impregnation of Melamine Formaldehyde Furfuryl Alcohol (MFFA) copolymer and 0.5% Nano-SiO2 on the physical, mechanical and durability properties of ganitri and jabon woods. The impregnation process was carried out by applying a 0.5 bar vacuum for 1 hour and followed by 2 bar pressure for 2 hours. The results showed that impregnation with MFFA and Nano-SiO2 could improve optimally the physical and mechanical properties and durability of fast-growing woods

Aging of Wood for Musical Instruments: Analysis of Changes in Color, Surface Morphology, Chemical, and Physical-Acoustical Properties during UV and Thermal Exposure.

The acoustic features of old resonance wood in violins exhibit a superior quality when compared to those from new resonance wood. This study focuses on an assessment of the sound quality of two types of wood for musical instruments, spruce and maple (class A and D), before and after aging via thermal and UV exposure. The samples were characterized before and after UV aging in terms of color change (using a Chroma meter), surface morphology (using a MarSurf XT20 instrument), chemical changes (monitored by FTIR spectroscopy), and sound propagation speed (using an ultrasound device). After UV treatment, the wavier surface increased the area of exposure and degradation. Also, the color changes were found to be more accentuated in the case of spruce compared to sycamore maple. The FTIR results indicated more advanced aging processes for spruce when compared to maple under the same experimental conditions. This difference resulted mostly from the increased formation of carbonyl-containing chromophores via oxidative processes in spruce rather than in maple, which is in agreement with the color change findings. Exposure of both species to thermal and UV radiation led to an increase in sound propagation speed, both longitudinally and radially, and to a greater extent in wood quality class A when compared to quality class D.

Diverse phenolic responses of six varietal wines (Vitis vinifera L.) throughout ageing in contact with a single type of oak barrels

SummaryBarrel ageing is a critical process in wine industry since it produces substantial changes in the chemical composition of wines. The transfer of polyphenols from wood to wine would be influenced by various factors including wood characteristics and storage conditions. The role of the wine matrix in the extraction/modification of polyphenols during wine ageing has been scarcely studied. The objective of this study was to characterise and compare the phenolic composition of six varietal wines (Carménère, Cabernet Franc, Malbec, Petit Verdot, Sangiovese and Tempranillo) during ageing in a single type of oak barrel aiming to learn about the role of the variety on the ageing process. Wine sampling was performed at 3‐month intervals for 1 year. Polyphenol profiles were analysed using spectrophotometric and HPLC‐DAD methods. The study showed that the effect of oak wood ageing on the phenolic composition of wines is highly influenced by the grape variety. Thus, different polyphenol‐associated chemical parameters of oak‐aged wines would be affected by chemical properties of the varietal wines that are present prior to barrel ageing.