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

Abstract

In the presented study, the structural, thermal, and mechanical properties of the nanocomposites were investigated by doping silanized hexagonal boron carbide (h-B 4 C) nanoparticles in varying proportions (0.5%, 1%, 2%, 3%, 4%, and 5%) into the epoxy resin by weight. For this purpose, the surfaces of h-B 4 C nanoparticles were silanized by using 3-(glycidyloxypropyl) trimethoxysilane (GPS) to improve adhesion between h-B 4 C nanoparticles and epoxy matrix.Then, the silanized nanoparticles were added to the resin by ultrasonication and mechanical stirring techniques to produce nanocomposites. The bond structure differences of silanized B 4 C nanoparticles (s-B 4 C) and nanoparticle doped composites were investigated by using Fourier transform infrared spectroscopy. Scanning electron microscopy and energy dispersion X-ray spectroscopy (SEM-EDS) technique was used to examine the distribution of nanoparticles in the modified nanocomposites. Differential scanning calorimetry and thermogravimetric analysis techniques were used to determine the thermal properties of the neat and s-B 4 C doped nanocomposites. The tensile test and dynamic mechanical analysis were performed to determine the mechanical properties. When the experimental results were examined, changes in the bonding structure of the s-B 4 C nanoparticles doped nanocomposites and significant improvements in the mechanical and thermal properties were observed. The optimum doping ratio was determined as 2% by weight. At this doping ratio, the T g , tensile strength and storage modulus increased approximately 18%, 35%, and 44% compared to the neat composite, respectively.

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

“…Bu amaçla, B4C nanopartikülleri 3-(glycidyloxypropyl) trimethoxysilane (GPS) bileşiği kullanılarak modifiye edilmiştir. Bu amaçla, modifikasyon işlemleri için aşağıdaki adımlar uygulanmıştır [26].…”

“…üretimi Modifiye edilmiş ve modifiye edilmemiş B4C katkılı yapısal yapıştırıcılar aşağıdaki adımlar izlenerek hazırlanmıştır [26].…”

“…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. [26], modifiye edilmiş hekzagonal B4C nanopartikülleri katkılı epoksi kompozitlerin yapısal, termal ve mekanik özelliklerini incelediği çalışmada, ağırlıkça %2 katkı oranının optimum değer olduğunu belirlemişlerdir. Optimum katkı değerinde, nanokompozitlerin camsı geçiş sıcaklığının, termal kararlılığının, depolama modülünün, çekme dayanımı ve elastisite modülünün arttığını belirtmişlerdir.…”

Effect of pyrolysis carbon black and carbon nanotubes on properties of natural rubber conductive composites

“…With the rapid development of the information and electronics industry, the traditional metal conductive materials can no longer meet the existing demand, so the conductive polymer materials with excellent conductive properties began to be widely studied 1–4 . In actual production, by adding various nanofillers, the rubber has high thermal conductivity, electric conductivity, and antistatic property on the basis of the original excellent performance.…”