Improvements of the structural, thermal, and mechanical properties of structural adhesive with functionalized boron nitride nanoparticles

Abstract

Investigations on the production and development of nanoparticle-reinforced polymer materials have been attracted attention by researchers. Various nanoparticles have been used to improve the mechanical, chemical, thermal, and physical properties of polymer matrix composites. Boron compounds come to the fore to improve the mechanical and thermal properties of polymers. In this study, mechanical, thermal, and structural properties of structural adhesive have been examined by adding nano hexagonal boron nitride (h-BN) to epoxy matrix at different percentages (0.5, 1, 2, 3, 4, and 5%). For this purpose, nano h-BN particles were functionalized with 3-aminopropyltriethoxysilane (APTES) to disperse the h-BN nanoparticles homogeneously in epoxy matrix and to form a strong bond at the matrix interface. Two-component structural epoxy adhesive was modified by using functionalized h-BN nanoparticles. The structural and thermal properties of the modified adhesives were investigated by scanning electron microscopy and energy dispersion X-ray spectroscopy, Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermogravimetric analysis techniques. Tensile test and dynamic mechanical analysis were performed to determine the mechanical properties of the adhesives. When the results obtained from analysis were examined, it was seen that the nano h-BN particles functionalized with APTES were homogeneously dispersed in the epoxy matrix and formed a strong bond. In addition that, it was concluded from the experimental results that the thermal and mechanical properties of adhesives were improved by adding functionalized nano h-BN particles into epoxy at different ratios.

Structural, thermal, and mechanical properties of silanized boron carbide doped epoxy nanocomposites

“…When the studies in the literature are examined, it can be seen that there is a similar situation in different ceramic forms of nanoparticles such as h-BN and nano-silica. 25,45 In the tan δ-temperature graph, the maximum value of the peak gives the glass transition temperature (T g ) of the nanocomposites. When the glass transition temperatures are examined, it can be seen that the glass transition temperatures increase up to 2% s-B 4 C doping ratio and then begin to decrease after this doping value.…”

“…For this purpose, s-B 4 C nanoparticles were added to 50 ml acetone and mixed in an ultrasonic homogenizer for 15 min. 25 After exfoliation of nanoparticles in acetone, the planned epoxy was added into the mixture and then mixed for 30 min in an ultrasonic homogenizer and high shear mixer, respectively. The mixture was stirred in an ice bath to avoid damage that arises from heat during the mixing process.…”

Modifiye edilmiş ve edilmemiş Bor Karbür (B4C) nanopartiküllerinin yapısal yapıştırıcıların mekanik özellikleri üzerine etkisi

“…Bor ve bor katkılı ürünler, kauçuk ve plastik sanayiden nükleer uygulamalara kadar birçok alanda öne çıkmaktadır. Polimer alanında ise, bor partiküllerin matris malzeme içerisine eklenmesiyle, kompozit malzemelerin mekanik, termal ve fiziksel özelliklerinde önemli iyileşmelerin sağlandığı görülmüştür [20][21][22][23][24][25][26][27].…”

“…Gültekin vd. [24] tarafından yapılan bir çalışmada, silan bileşiği ile fonksiyonelleştirilmiş BN nanopartikülleri katkılı yapısal yapıştırıcıların yapısal, termal ve mekanik özelliklerini incelemişlerdir. Yapıştırıcı içerisine ağırlıkça %3 oranında BN nanopartikülleri katılmasıyla çekme dayanımı, elastisite modülü ve statik tokluk değerlerinin sırasıyla %48, %49 ve %87 oranında arttığı ifade edilmiştir.…”

“…Modifiye edilmiş B4C nanopartikülleri katkılı yapıştırıcıların DMA sonuçları (a) depolama modülü (b) tan[24] (a) (b) Şekil. Modifiye edilmemiş B4C nanopartikülleri katkılı yapıştırıcıların DMA sonuçları (a) depolama modülü (b) tan[24] …”