Malzeme ve Malzeme İşleme Teknolojileri BölümüMalzeme ve Malzeme İşleme Teknolojileri Bölümü'ne ait koleksiyonları içerir.http://hdl.handle.net/11772/6192024-03-28T14:20:07Z2024-03-28T14:20:07ZThe impact of nanoparticles and moisture content on bonding strength of urea formaldehyde resin adhesiveBardak, TimuçinSözen, EserKayahan, KadirBardak, Selahattinhttp://hdl.handle.net/11772/29322020-04-27T09:19:36Z2018-01-01T00:00:00ZThe impact of nanoparticles and moisture content on bonding strength of urea formaldehyde resin adhesive
Bardak, Timuçin; Sözen, Eser; Kayahan, Kadir; Bardak, Selahattin
Wood and wood products have been used in different environmental conditions. Moisture content
(MC) and relative humidity (RH) are key parameters for these conditions and bonding strength. Nanotechnology has paved the way to more durable adhesives. An experimental study was conducted to examine the effects of various nanoparticles and moisture content on bonding strength of urea formaldehyde (UF) resin adhesive. In this study, nanosilicon dioxide (SiO2) and titanium dioxide (TiO2
) were blended with UF. Nanoparticle reinforced adhesives were processed at different nano fi llers concentrations (0.5 % and 1 %) and each adhesive was tested at the moisture content of 0 %, 12 %, 18 % and 25 %. According to the results of bonding strength tests, contained nano-SiO2 adhesives showed better bonding strengths as compared to the control (pure UF) and contained nanoTiO2 adhesives. The highest bonding strength has been determined at 12 % wood moisture in all specimens. Increasing the moisture content has decreased bonding strength of all samples including control samples. This study
showed that nano (SiO2 and TiO2) particles have improved the bonding strength of pure UF. Besides, the addition of nano-SiO2 and nano-TiO2 changed the physicochemical properties of UF adhesive by XRD test. The novelty of this study was to demonstrate that nanoparticles.
2018-01-01T00:00:00ZKonut mutfak dolaplarında tercih edilen kapak modelleri: Artvin ili örneğiAtılgan, AbdiBayraktar, Kemal DursunErsen, NadirKayahan, Kadirhttp://hdl.handle.net/11772/29312020-04-27T09:14:39Z2012-01-01T00:00:00ZKonut mutfak dolaplarında tercih edilen kapak modelleri: Artvin ili örneği
Atılgan, Abdi; Bayraktar, Kemal Dursun; Ersen, Nadir; Kayahan, Kadir
Bu çalışmada, günümüz konut mutfak dolaplarında kullanılan kapak modellerinin
belirlenmesi ve tercih edilme sebepleri araştırılmıştır. Çalışma, Artvin ilinin kentsel yerleşim
alanını oluşturan farklı sosyo-ekonomik (Alt/Orta/Üst SED) düzeylere sahip ailelerin
mutfakları örnekleme yöntemiyle seçilmiştir. Veriler, anket uygulama ve sistematik gözlemle
elde edilmiştir. Çalışma sonunda kapak türünün seçiminde öne çıkan unsurların belirlenmesi
ve yorumlanması için bazı istatistikî teknikler kullanılmıştır. Sonuçlara göre konut mutfak
dolaplarında; en çok Suntalam / Mdflam kapak (% 25), en az Alüminyum çerçeveli kapak (%
1,09 ) kullanılmıştır. Tercih edilme sebepleri ise; teknolojik gelişmelere paralel yeni ürünlerin
piyasaya sunulması ve konut sahiplerinin üreticilerden almış oldukları öneriler etkili olurken,
kapak modellerinin maliyet farkları tercih edilme sebeplerini önemli oranda etkilemektedir.
Diğer önemli bir sonuçta, konut sahiplerinin mutfak dolaplarını temin etme şeklidir. Buna
göre, kullanıcıların büyük çoğunluğu mutfak mobilyalarını sipariş yolu ile temin ederken,
diğer mekânlarda bulunan donatı elemanlarının çoğunlukla hazır üretim yapan yerlerden
temin edildiği bilinmektedir.
2012-01-01T00:00:00ZImproving impregnation and penetration properties of refractory woods through cryogenic treatmentYörür, HüseyinKayahan, Kadirhttp://hdl.handle.net/11772/29302020-04-27T09:09:16Z2018-01-01T00:00:00ZImproving impregnation and penetration properties of refractory woods through cryogenic treatment
Yörür, Hüseyin; Kayahan, Kadir
Cryogenic treatment via liquid nitrogen (LN) was evaluated as a means to improve the capability of impregnation and penetration in fir and spruce wood. There are a few vital problems that occur during the impregnation process of wood protection. One problem is that refractory woods have different anatomical features that make the impregnation process difficult. For the specimens that were conditioned with the air and oven, the retention changes were determined with an image analysis, scanning electron microscopy (SEM), and energy dispersive X-ray analysis (EDX). In addition, the density and equilibrium moisture content (EMC) values were measured. The LN treatment resulted in degradation in the bordered pits. Then, the margo and torus bonds were torn, the bordered pits were opened, and the liquid transportation of wood was facilitated. It was determined that the LN treatment and impregnation increased the depth and dispersion capability of the penetration. The LN treatment helped facilitate the flows from pores to pores by hindering the aspirations of the bordered pits, and thus the flow of chemicals was facilitated. Obtaining deeper penetration in refractory wood species will result in an improved impregnation process.
2018-01-01T00:00:00ZThe effects of liquid nitrogen treatment on the some physical and mechanical properties of scots pine and oriental spruce woodYörür, HüseyinKayahan, KadirGünay, Muhammed NuriAltun, SuatŞeker, Belginhttp://hdl.handle.net/11772/29292020-04-27T08:36:00Z2017-01-01T00:00:00ZThe effects of liquid nitrogen treatment on the some physical and mechanical properties of scots pine and oriental spruce wood
Yörür, Hüseyin; Kayahan, Kadir; Günay, Muhammed Nuri; Altun, Suat; Şeker, Belgin
The wood materials widely used from wood construction sector, urban furniture and interior design to furniture sector are renewable resource. Wood has some disadvantages regarding durability to combustion and biological factors. To increase service life especially in urban furniture are coated and/or impregnated against to fire and biological factors. Thus, the wood materials used in construction sector should be treated with fire-retardant chemicals. In this study; Scots pine and Oriental spruce wood materials were exposed to liquid nitrogen for 30 minutes before impregnated with Firetex by using pressure-vacuum method. According to the results, amount of retention in Oriental spruce and Scots pine samples have been increased with liquid nitrogen treatment. Additionally, it was seen that the liquid nitrogen operation had not significant adverse effect on the mechanical properties. Therefore, the liquid nitrogen treatment can apply effectively as a method to improve the impregnability of the wood.
2017-01-01T00:00:00Z