Bonding Strength of Some Adhesives in Heat-Treated Hornbeam (Carpinus betulus L.) Wood Used for Interior and Exterior Decoration

Uzun, Oğuzhan; Perçin, Osman; Altınok, Mustafa; Küreli, İhsan

doi:10.15376/biores.11.3.7686-7696

Cited by 8 publications

(5 citation statements)

References 21 publications

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“…Similar results for bonding thermally modified wood are also presented in the papers (Uzun et al, 2016;Andromachi & Ekaterini, 2018;Taghiyari et al, 2020). The authors noted that the decrease in strength is affected by wetting ability, microcracks, density, surface of thermally modified wood, and the physical-chemical characteristics of the adhesive.…”

Section: Resultssupporting

confidence: 73%

Untitled

2023

Ukr. j. for. wood sci.

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Доктор сільськогосподарських наук, професор, Національний університет біоресурсів і природокористування України, Україна Доктор сільськогосподарських наук, доцент, Національний університет біоресурсів і природокористування України, Україна Кандидат сільськогосподарських наук, доцент, Національний університет біоресурсів і природокористування України, Україна Доктор сільськогосподарських наук, професор, Національний університет біоресурсів і природокористування України, Україна Доктор сільськогосподарських наук, професор, Національний університет біоресурсів і природокористування України, Україна Доктор сільськогосподарських наук, професор, Національний університет біоресурсів і природокористування України, Україна Доктор сільськогосподарських наук, професор, Національний університет біоресурсів і природокористування України, Україна Кандидат технічних наук, доцент, Чернігівський національний технологічний університет, Україна Доктор технічних наук, професор, Національний університет біоресурсів і природокористування України, Україна Доктор технічних наук, професор, Національний університет біоресурсів і природокористування України, Україна Доктор біологічних наук, доцент, Національний університет біоресурсів і природокористування України, Україна Доктор біологічних наук, професор, Національний лісотехнічний університет України, Україна Кандидат сільськогосподарських наук, Український науково-дослідний інститут сільськогосподарської радіології, Україна Доктор біологічних наук, професор, Інститут агроекології і природокористування НААН, Україна Кандидат сільськогосподарських наук, доцент, Національний університет біоресурсів і природокористування України, Україна Доктор сільськогосподарських наук, професор, Національний університет біоресурсів і природокористування України, Україна

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Section: Resultssupporting

confidence: 73%

Untitled

2023

Ukr. j. for. wood sci.

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“…The adhesion strength of heat treated wood can be affected by various factors such as the pH of the wood and its equilibrium moisture value. Heat treatment causes a decrease in the pH and equilibrium humidity of the wood [24,25]. Changes in the pH value of the wood surface may delay or accelerate the curing of adhesives, depending on the type of adhesive used for Bonding [26].…”

Section: Resultsmentioning

confidence: 99%

“…He reports that low equilibrium humidity values significantly delay the resin bonding performance. A series of studies have shown that the shear strength of wood is negatively affected by heat treatment temperature and processing time [29,27,24,30,31]. The adhesion strength, wood rupture and elongation values of the test samples after A1, A4 and A5 holding conditions are shown in Tables 3, 4 and 5, respectively (Figure 2).…”

Section: Resultsmentioning

confidence: 99%

Isıl İşlem Görmüş Ahşap Kullanılarak Çeşitli Koşullar Altında Yapışma Performansının İncelenmesi

Altunok¹

2021

Politeknik Dergisi

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In this study, the adhesion performance of oak (Quercus petrea Liebl.) And Scotch pine (Pinus Silvestris L.) wood samples that were heat treated and glued with 1K-PUR adhesive were kept under different conditions (A1-A4-A5) and moisture contents (20°C /% 35, 20°C /%65 ve 20°C /% 95), and then the adhesion performance was investigated.Rough sized pieces of both types of wood were heat treated at 195°C for 2 hours. Test samples were prepared from untreated and heat treated blanks (DIN EN 204). Tensile tests according to DIN EN 204 were applied to samples kept at 20°C/35%, 20°C/65% and 20°C/95% temperature and relative humidity, respectively, and the adhesion performance was determined in three climatic conditions.At the end of these tests, it was found that the holding environment and climatic conditions have a significant effect on the adhesion resistance. It was observed that the samples that were kept under A1 conditions and tested had wood rupture (error) between 70% and 100%, and the samples tested after holding in A4 and A5 conditions mostly broke off from the glue joint.

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“…Thermal modifi cation process also reduces the surface wettability and increases surface brittleness, which then negatively affects bond performance of wood (Chu et al, 2016;Šernek et al, 2008;Kariž and Šernek, 2012;Uzun et al, 2016). However, shear strength and delamination tests performed on native and thermally modifi ed Norway spruce and poplar glued with PUR and MUF adhesives were found to meet the requirements for glued laminated timber (Šernek et al, 2008).…”

Section: Materijali I Metodementioning

confidence: 99%

Influence of natural surface ageing on bonding quality of thermally modified oak and beech wood

2019

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This paper presents the influence of natural surface ageing in indoor conditions on bonding quality of thermally modified wood used in structural laminated products. Two unmodified and thermally modified wood species were used for the experiment: oak and beech. Samples were planed and glued with MUF adhesive 2 hours, 1, 2, 6, 10, and 18 days after planing. Properties of laminated beech and oak beams, namely shear strength, delamination and contact angle, were measured in order to detect 1) suitability of wood species for lamination process and 2) influence of extended storage time after planing on properties of laminated wood. Generally, both native and thermally modified beech exhibited better results of shear strength and delamination and had lower contact angles compared to oak and thermally modified oak. Results of the delamination test (total delamination) indicate time dependence of surface ageing. Both unmodified and thermally modified beech may be successfully laminated at least up to 2 days after planing, whereas neither oak nor thermally modified oak are suitable for lamination process due to excessive delamination. Results of delamination may be related to contact angle measurements. Shear strength of glue lines did not show any influence on natural surface ageing. However, whereas beech and thermally modified beech samples exhibited almost the same values of the shear strength regardless of the duration of surface ageing, there is an obvious difference in shear strength of oak and thermally modified oak samples.

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Bonding Strength of Some Adhesives in Heat-Treated Hornbeam (Carpinus betulus L.) Wood Used for Interior and Exterior Decoration

Cited by 8 publications

References 21 publications

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Isıl İşlem Görmüş Ahşap Kullanılarak Çeşitli Koşullar Altında Yapışma Performansının İncelenmesi

Influence of natural surface ageing on bonding quality of thermally modified oak and beech wood

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