Grafen Nanopartiküllerinin Dokuma Aramid/Epoksi Kompozitlerinin Mekanik Özelliklerine Etkisi

Year 2025, Volume: 13 Issue: 1, 402 - 411, 30.01.2025

Ömer Şen , Musa Yıldırım

https://doi.org/10.29130/dubited.1542336

Abstract

Bu çalışmada aramid fiber /epoksi kompozitlere ilave edilen grafen miktarının bu kompozitlerin mekanik özelliklerine etkisi incelenmiştir. Çalışmada epoksi matris içerisine dört farklı oranda grafen
nanopartiküller ilave edilerek mekanik yöntemle karıştırıldıktan sonra el yatırma ve vakum infüzyon
yöntemleri kullanılarak 5 katlı aramid epoksi grafen kompozit plakalar elde edilmiştir. Elde edilen bu kompozit plakalardan eğme testi için ASTM 790 ve çekme testi için ASTM D3039 standartlara göre numuneler kesilerek üç nokta eğme ve çekme testleri yapılmıştır. Mikro yapı incelemeleri makro
mikroskop altında yapılmıştır. Yapılan çalışmalar sonrasında üretilen kompozitlerin mikro yapılarında
aglomerasyonun oluştuğu gözlemlenmiştir. Aramid epoksi kompozite ilave edilen grafenin eğilme dayanımı ve eğilme modülünü arttırdığı %1 grafen ilave edilen numunelerde en yüksek eğilme gerilmesi
gözlenmiştir. Katkısız numunelere göre bu numunede eğilme mukavemeti yaklaşık %64 oranında artmıştır. Ayrıca çekme testleri sonrasında en yüksek çekme dayanımının katkısız numunelerde olduğu, %0.25 den daha fazla grafen ilave edilen numunelerde ise grafenin yapıda oluşturduğu aglomerasyona bağlı olarak çekme dayanımının düştüğü tespit edilmiştir.

Keywords

Grafen nanopartikülleri, Mekanik özellikler, Aramid lifler, Epoksi kompozitler

Project Number

KBÜBAP-21-YL-010

THE EFFECT OF GRAPHENE NANOPARTICLES ON THE MECHANICAL PROPERTIES OF WOVEN ARAMID/EPOXY COMPOSITES

Abstract

In this study, the effect of the amount of graphene added to aramid fiber/epoxy composites on the mechanical properties of these composites was investigated. In the study, graphene nanoparticles were added to the epoxy matrix at four different rates and mixed by mechanical methods, and then 5-layer aramid epoxy graphene composite plates were obtained using hand lay-up and vacuum infusion methods. Samples were cut from these composite plates according to ASTM 790 for bending test and ASTM D3039 for tensile test and three-point bending and tensile tests were performed. Microstructure examinations were carried out under a macro microscope. After the studies, it was observed that agglomeration occurred in the microstructures of the produced composites. It was determined that graphene added to the aramid epoxy composite increased the bending strength and bending modulus, the highest bending stress was observed in the samples with 1% graphene added. The flexural strength, which compared to the undoped composite, increased about 64 % in this sample. In addition, the highest tensile strength was measured in the undoped sample, and after the 0.25% graphene addition, the tensile strength decreased due to the agglomeration of graphene that occurred in the structure.

Keywords

Graphene nanoparticles, Mechanical properties, Aramid fibers, Epoxy composites

Supporting Institution

The authors are thanks to the financial support for this study from Karabuk University Scientific Research Projects Department (KBÜBAP 21-YL-010)

Project Number

KBÜBAP-21-YL-010

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