Kürşat GÜLTEKİN, Mustafa Enes YAZICI

Fonksiyonelleştirilmiş bor nanopartiküllerinin yapıştırıcıyla birleştirilmiş tek tesirli kompozit bağlantılar üzerinde etkisi

Yapılan bu çalışmada; hegzagonal bor nitrür (hBN) ve hegzagonal bor karbür (hB4C) nanopartiküllerinin yapıştırma bağlantıları üzerine etkisi araştırılmıştır. Nanopartiküllerin epoksi yapıştırıcı içerisinde homojen dağılımının sağlanması ve adhezyonunun iyileştirilmesi amacıyla; hBN nanopartikülleri 3-(aminopropyl) triethoxysilane, hB4C nanopartikülleri ise 3-(glycidyloxypropyl) trimethoxysilane bileşiği kullanılarak fonksiyonelleştirilmiştir. Fonksiyonelleştirilen nanopartiküller, farklı viskozite değerine sahip iki farklı epoksi yapıştırıcı içerisine (Araldite 2011 ve MGS-LR285), ağırlıkça %0,5, %1, %2 ve %3 oranlarında katılarak yeni nanokompozit yapıştırıcılar üretilmiştir. Geliştirilen nanokompozit yapıştırıcılar ve üretilen düz dokuma karbon fiber kompozitler kullanılarak tek tesirli yapıştırma bağlantıları üretilmiştir. Yapıştırma bağlantılarının mekanik özellikleri ASTM D1002 standardına göre yapılan çekme testi ile belirlenmiştir. Çalışma sonuçları incelendiğinde, fonksiyonelleştirilen hBN ve hB4C nanopartikülleri ile birleştirilmiş bağlantıların hasar yükünde önemli artış sağlanmıştır. Hasar yüklerindeki bu artışın bor nanopartiküllerine, partiküllerin katkı oranına ve yapıştırıcının türüne bağlı olarak değiştiği görülmektedir. Araldite 2011 yapıştırıcısı içerisine ağırlıkça %2 oranında fonksiyonelleştirilmiş hBN ve hB4C nanopartikülleri katkısıyla bağlantıların hasar yükünde sırasıyla %33 ve %31 oranlarında artış elde edilmiştir. Benzer şekilde MGS-LR285 yapıştırıcısı içerisine %2 oranında fonksiyonelleştirilmiş hBN ve hB4C nanopartikülleri katkısıyla ise bağlantıların hasar yükleri sırasıyla %31 ve %52 oranlarında artmıştır.

Anahtar Kelimeler:

Bor Nanopartikülleri, Yapıştırıcı, Kompozit, Çekme Testi, Hasar Yükü

Effect of functionalized boron nanoparticles on the adhesively bonded single lap composite joints

In this study, the effects of hexagonal boron nitride (hBN) and hexagonal boron carbide (hB4C) nanoparticles on adhesive joints were investigated. In order to increase uniform distribution and adhesion of nanoparticles in epoxy adhesive, hBN nanoparticles were functionalized by using 3-(aminopropyl) triethoxysilane and hB4C nanoparticles were functionalized by using 3-(glycidyloxypropyl) trimethoxysilane compound. New nanocomposite adhesives were manufactured by adding functionalized nanoparticles into two different epoxy adhesives with different viscosity values (Araldite 2011 and MGS-LR285) at 0.5%, 1%, 2% and 3% proportions by weight. Single lap adhesive joints were produced with using the new enhanced nanocomposite adhesives and plain woven carbon fiber composites. In order to determine mechanical properties of the adhesive joints, tensile test was carried out according to ASTM D1002 standard. When the results of the study were examined, failure loads of adhesive joints increased by using hBN and hB4C nanoparticles. It can be seen that increase in failure loads depend on reinforcement ratio, types of boron particles and adhesives. Failure load of the joints increased 33% and 31% with the addition of 2 wt.% functionalized hBN and hB4C nanoparticles into Araldite 2011 adhesive, respectively. Similarly, failure load of joints increased 31% and 52%, with the addition of 2 wt.% functionalized hBN and hB4C nanoparticles into MGS-LR285 adhesive, respectively.

Keywords:

Boron nanoparticles, Adhesive, Composite, Tensile Test, Failure Load,

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