Suleyman Korkut

Suleyman Korkut
Duzce University · Department of Forest Industry Engineering

About

117
Publications
43,649
Reads
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2,038
Citations
Additional affiliations
December 2017 - present
Duzce University Faculty of Forestry
Position
  • Professor
March 2013 - May 2013
Oklahoma State University
Position
  • Researcher
Description
  • http://nrem.okstate.edu/
March 2011 - December 2017
Duzce University, Faculty of Forestry
Position
  • Professor (Associate)

Publications

Publications (117)
Article
...PLEASE USE DOI, FOR FULL TEXT... This study aims to examine the effect of the thermal modification process on the surface roughness properties of the wood of rowan (Sorbus aucuparia L.) as a fast-growing species. Four thermal modification processes were applied, with temperatures of 160 and 180°C and durations of 2 and 4 hours. In total five gro...
Article
The aim of this work was to detect sounds providing evidence of the creation of drying defects and to correlate such data with drying quality. A further goal was to establish sound wave thresholds of ideal drying through the drying process by using an acoustic emission (AE) monitoring method. Thus, it is projected to decrease long drying times and...
Conference Paper
This study aimed to determine the changes in some physical and mechanical resistance values of Aspen(Populus tremula) and Oriental spruce (Picea orientalis) woods which was heat treated at different combinations of temperatures using the Thermowood method. Aspen(Populus tremula) and Oriental spruce (Picea orientalis) woods were first Thermowood hea...
Article
Full-text available
Heat treatment is a modification method that has gained importance since the 1990s as part of the trend for more rational use of wooden materials. Heat-treated wood products are becoming more popular and have an established place in the market. For this reason, it is important to research applications for various wood types after heat treatment. In...
Conference Paper
This study aimed to determine the changes in some mechanical resistance values of wild cherry (Cerasus avium (L.) Monench) wood which was heat treated at different combinations of temperatures and durations using the thermowood method. The wild cherry (Cerasus avium (L.) Monench) wood was first thermowood heat treated at 190 and 212 °C for 1 and 2...
Article
Wood heat treatment has increased significantly in recent years and is still growing as an industrial process to improve some wood properties. We studied the change of swellingand surface roughness of common alder (Alnus glutinosa (L.) Gaertn. ssp.glutinosa) and wych elm (Ulmus glabra Huds.) woods after heat treatment at two different temperatures...
Article
Full-text available
The influence of thermal treatment conditions on natural colour of Turkish hazelnut wood was investigated. It was realized that the elevated temperature and prolonged treatment time usually effects on darker tone on wood samples. However, the greatest lightness (∆L) changes occurred in 180ºC and 10 hour treatment (37% decreases) followed by 180ºC a...
Article
Full-text available
Low hygroscopicity is an important factor favoring the use of heat-treated wood materials. Hence, wild cherry (Cerasus avium (L.) Moench) wood was subjected to heat treatment with the ThermoWood® method for about 1 and 2 hours at temperatures of 190 and 212 °C in an industrial business. Then, trial samples were prepared and divided into two groups....
Article
Full-text available
In its wise use, many properties of wood are important. Among these properties, wood abrasion resistance (AR) and withdrawal capacity of screws (WCS) are deemed to be relatively significant. It is well know that heat treatment changes the resistance features of wooden materials by changing the structural characteristics of wood. Within the scope of...
Article
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Kosovo, located in the heart of the Balkans, was formerly a part of Yugoslavia. The breakup of Yugoslavia led not only to the creation of new countries and borders; it also had a huge impact on the transpor-tation and availability of raw materials and goods. Kosovo's forest products industry has been greatly affected by the country's current politi...
Article
Full-text available
The aim of this study is to determine the change of some physical properties (oven-dry density, weight loss, swelling and anti-swelling efficiency) and mechanical properties (compression strength parallel to grain, bending strength, modulus of elasticity in bending, janka-hardness (cross-section, radial, tangential), impact bending strength and ten...
Article
Full-text available
World production of wood based panel has grown from 63,1 million cubic meters in 2005 to 75,5 million m(3) in 2009, a 12 million m(3) rise in production. China is the world's largest wood based panel's manufacturer. The Turkish wood based panels industry has shown a tendency of fluctuating during this time. Turkey, as the world's 4th largest produc...
Article
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Wild cherry wood (Cerasus avium) lumber with a nominal thickness of 5 cm from Duzce region in Turkey was dried through conventional kiln drying using two different programs which are unprotective drying schedules, and protective drying schedules. The aim was to obtain the most desirable kiln schedule for keeping the wood quality at an appropriate l...
Article
Full-text available
Various thermal modification techniques are used to improve some properties of wood materials. Thermally compressed wood (TCW) is obtained by using a hot-press. This study investigates the effect of thermal compression on the density, vertical density profile (VDP), moisture content (MC), thickness swelling (TS), Janka hardness, and drying characte...
Article
Full-text available
The common use of Rowan wood (Sorbus aucuparia Lipsky) in the forest products industry of Turkey, was evaluated for some of the combustion properties after impregnation with various chemical materials. For this purpose, the wood test samples prepared from Rowan wood materials according to TS 345 were treated with Tanalith-E, Vacsol-Azure, Imersol-A...
Article
Full-text available
The objective of this study was to evaluate some properties of experimental particleboard panels manufactured from wheat straw that had been pretreated with acetic anhydride, soapy solution, hot water, or steam. Wheat straw particles were mixed with commercially manufactured wood particles at a ratio of 60%. Control straw particleboards with non-tr...
Article
Full-text available
The objective of this study was to evaluate the effect of heat treatment on properties including oven-dry density, weight loss, surface roughness, shear strength, and hardness of eastern red cedar (Juniperus virginiana L.). The anatomical structures of samples were also examined by scanning electron microscope (SEM). Two different heat treatment sc...
Article
The goal of this study was to investigate the effects of thermal modification by hot-pressing on the performance properties of paulownia wood boards. The boards were thermally modified by hot-pressing method under different pressure and temperature levels. As two boards for each modification group plus two for unmodified, totally 10 experimental wo...
Article
Full-text available
This study was conducted to evaluate suitability of luffa (Luffa cylindrica) fiber for medium density fiberboard (MDF) production. For the experiment, luffa and commercially manufactured fibers (Pinus sylvestris (30%), Fagus orientalis Lipsky (35%) and Quercus robur L. (35%)) with 11% moisture content were used. Luffa was mixed with commercially ma...
Article
Full-text available
The aim of this research was to determine some of the mechanical properties of Rowan wood impregnated with various impregnation materials. For this purpose, the test samples were prepared from Rowan (Sorbus aucuparia Lipsky) wood materials that are of common use in the forest products industry of Turkey according to TS 345. The test samples were tr...
Article
Full-text available
Beech wood (Fagus sylvatica L.) is one of the most important timber species produced in Kosovo. About 33% of the trees in our country are beech and most of the wood products are from this kind of timber. The color difference between red heart wood and white wood of the beech is significant. Adequate protection against weathering (snow, rain and low...
Article
Full-text available
Heat treatment is often applied to some wood species to improve the dimensional stability of the wood. In this study, the effects of heat treatment on the colour of Scots pine (Pinus sylvestris L.) and Uludağ fir [Abies Nordmanniana (Stev.) subsp. Bornmuelleriana (Mattf.)] were examined. These species have a high potential for industrial usage and...
Article
Full-text available
The potential utilization of burned wood in the manufacture of medium density fiberboard (MDF) was investigated. For this aim, the MDF panels were made of various mixtures of burned pine wood (Pinus sylvestris L.), unburned beech (Fagus orientalis L.) and oak (Ouercus robur L.) woods under commercial conditions in an MDF company. The mixture ratio...
Article
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A study was carried out to analyze the particles produced during drilling process with twist drills with one and two spirals (length 70 mm, diameter 8 mm) with different feeding speeds, executed in beech (Fagus sylvatica), pine (Pinus sylvestris) and oak (Quercus petraea) woods, and also, medium density fiberboard (MDF), particleboard and poplar pl...
Article
Full-text available
Thermally modified wood is being increasingly offered in Europe as an alternative to preservative-treated timber. The aim of this study is to determine the change of various physical properties (oven-dry density, air-dry density, weight loss, swelling and anti-swelling efficiency (ASE)), compression strength parallel to grain, colour difference (ΔE...
Article
The objective of this research was to investigate the wettability and surface roughness properties of the plywood panels under thermal modification. The plywood panel specimens were subjected to thermal modification under atmospheric pressure and presence of air at a temperature of 150, 170 or 190°C for 60min. The contact angle measurements were ob...
Article
The concept of thermal modification has evolved from a challenging research program to commercial reality in several European countries in recent years. The aim of this study is to determine the change of various physical properties (oven-dry density, air-dry density, weight loss, swelling and anti-swelling efficiency (ASE)), compression strength p...
Article
Full-text available
Wettability and surface roughness properties of medium density fiberboard (MDF) panels made from Rhododendron biomass were examined in this study. Rhododendron dominates the understory layer of the forests throughout the Black Sea Region in Turkey with substantial biomass potential. This study was conducted to evaluate suitability of Rhododendron f...
Article
Full-text available
Siberian pine wood imported from Russian Federation has a wide indoor and outdoor application in Turkey. The factors which affect drying times and consequently drying costs, control system quality and drying schedules of this wood are well known; however, the effect of surface quality on drying times of Siberian pine wood is not known. In this stud...
Article
Colour evolution and colour changes were analyzed from small specimens of three heat treated wood species using the CIE L*a*b* colour space. Upon heat exposure, the wood substance became darker of species; this was accompanied by a steady reduction in lightness. As treatment conditions (e.g., time and temperature) increase, various shades of yellow...
Article
Full-text available
Turkey including its native wood species with high commercial value are recognised internationally. This work presents information about physical and mechanical properties and the use of lesser-known native wood species. This article's aim is to familiarize wood expert outside Turkey with the wood of Silver Lime by comparing its physical and mechan...
Article
Full-text available
The aim of this study was to investigate the effect of the thermal modification process by hot-press on the wettability and surface roughness characteristics of the eucalyptus wood boards. The roughness measurements, average roughness (Ra), and maximum roughness (Rmax) were taken both parallel and perpendicular to the grain using a fine stylus trac...
Article
Full-text available
Purpose - The purpose of this paper is to investigate how impregnation with boron compounds affects the surface hardness of varnished wood materials. Design/methodology/approach - Test samples were prepared from Scotch pine, Oriental spruce, and Uludag fir, which met the requirements of ASTM D 358.These samples were impregnated with boric acid (Ba)...
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Full-text available
Purpose - The purpose of this paper is to determine the effect of Imersol Aqua impregnation of Scotch pine, Oriental spruce, and Uludag fir on the surface adhesion strength of various types of varnishes. The finding obtained would benefit the manufacturers of building materials and furniture, where the surface adhesion strength of water-based varni...
Article
Full-text available
This study is carried out for determining the changes occurring on the amount of the material used on the protective layer when polyurethane and acrylic (lacquered) dye is applied on the test samples prepared from sandwich type composite (blockboard) boards with their surface coated or uncoated with paper, which are used for the yacht furniture and...
Article
Full-text available
The aim of the study was to determine the effects of different heat treatment and varnish application combinations on hardness, scratch resistance, and glossiness of wood materials sampled from limba (Terminalia superba), iroko (Chlorophora excelsa), ash (Fraxinus excelsior L.), and Anatolian chestnut (Castenea sativa Mill.) species. The heat treat...
Article
Full-text available
This study examined the impacts of varnishing after impregnation with boron compounds on combustion properties of oriental beech. The test samples prepared from oriental beech (Fagus orientalis Lipsky) wood were impregnated according to ASTM D 1413-76-99 with boric acid (Ba) or borax (Bx) using a vacuum technique. After impregnation, one of six var...
Article
Full-text available
The surface hardness, surface roughness, glossiness, and color difference were determined for wooden materials produced from three commonly used species - two native of Turkey and one exotic - treated with one- and two-component water-based varnishes and exposed to different amounts of radiation to mimic accelerated aging using a QUV aging device....
Article
Full-text available
The aim of the current study is to determine the effects of different heat treatment and varnish combination applications on some of the physical properties of wood materials sampled from limba (Terminalia superba), iroko (Chlorophora excelsa), ash (Fraxinus excelsior L.) and Anatolian chestnut (Castenea sativa Mill.) species. The heat treatment wa...
Article
Full-text available
We have assessed the effect on bonding performance of modifying synthetic wood adhesives. Wood samples were prepared from Scots pine (Pinus sylvestris L.) and oriental beech (Fagus orientalis L.). Samples were bonded using poly(vinyl acetate) (PVAc) and urea-formaldehyde (UF) adhesives modified with melamine-formaldehyde (MF) and phenol-formaldehyd...
Article
Full-text available
Thermal treatment techniques are used for modifying wood and wood-based materials to improve dimensional stability and hygroscopicity. This study investigated the effects of press pressure and temperature on density, vertical density profile, thickness swelling and surface hardness of eucalyptus wood boards. The experimental wood boards were prepar...
Article
Full-text available
This study is carried out for determining the changes occurring on the amount of the material used on the protective layer when polyurethane and acrylic (lacquered) dye is applied on the test samples prepared from sandwich type composite (blockboard) boards with their surface coated or uncoated with paper, which are used for the yacht furniture and...
Article
Full-text available
The objective of this study was to investigate the effects of heat treatment on the physical and mechanical properties of sessile oak (Quercus