HİDROTERMAL KARBON İÇERİĞİNİN POLİETİLEN MATRİSLİ KOMPOZİTLERİN AŞINMA ÖZELLİKLERİNE ETKİSİ

Abstract

Karbon nanotüpler veya grafen nanoplateletler gibi yaygın olarak kullanılan karbon bazlı malzemelerle karşılaştırıldığında, hidrotermal karbonlar (HTC) çevre dostu yaklaşımlarla daha düşük bir maliyetlerle elde edilirler. HTC, piller, manyetik malzemeler, süper kapasitörler, adsorban malzemeler vb. gibi geniş bir uygulama alanı olmasına rağmen, HTC takviye malzemesi olarak kompozitlerde kullanımına ilişkin az sayıda çalışma bulunmaktadır. Bu çalışmada, enjeksiyon kalıplama yöntemi ile ağırlıkça farklı miktarlarda (%0.5, %1, %2) HTC içeren polietilen matrisli kompozitler üretilmiştir. HTC içeriğinin polietilen matrisli kompozitlerin aşınma özellikleri üzerindeki etkisi araştırılmıştır. Kuru kayma koşullarında farklı yükler uygulanarak aşınma testleri gerçekleştirilmiştir. Aşınma sonuçlarını yorumlayabilmek adına numunelerin mekanik özellikleri çekme ve darbe testleri ile belirlenmiştir. Ayrıca, HTC ilavesinin kompozitlerin yapısal ve termal özellikleri üzerindeki etkisini anlamak için FTIR ve DTA analizleri yapılmıştır. Sonuçlar, düşük takviye oranlarında HTC eklenmesinin, polietilenin mekanik ve tribolojik özelliklerinin geliştirilmesini sağladığını göstermektedir. Böylece, hidrotermal karbonun polimer matrisli kompozitler için alternatif bir karbon bazlı takviye malzemesi olabileceği söylenebilmektedir.

Keywords

• Hidrotermal karbon
• polietilen
• aşınma özellikleri
• kompozit malzemeler
• mekanik özellikler

EFFECT OF HYDROTHERMAL CARBONS CONTENT ON WEAR PROPERTIES OF POLYETHYLENE MATRIX COMPOSITES

Abstract

Compared to commonly use carbonaceous materials such as carbon nanotubes or graphene nanoplatelets, hydrothermal carbons (HTCs) are obtained with environmentally friendly approaches at a lower cost. Although HTCs have a wide application area such as batteries, magnetic materials, supercapacitors, adsorbent materials, etc., there are few studies on the usage of HTC as reinforcement material for composites. In this study, polyethylene matrix composites containing different amounts (0.5 wt.%, 1 wt.%, 2 wt.%) of HTCs were fabricated via the injection molding process. The effect of HTCs content on the wear properties of polyethylene matrix composites was investigated. Reciprocating wear tests were performed applying different loads at dry sliding conditions. To correlate with wear results, the mechanical properties of samples were determined by tensile and impact tests. Also, FTIR and DTA analyzes were conducted to understand the effect of HTCs on the structural and thermal properties of composites. Results show that the addition of HTCs led to the enhancement of mechanical and tribological properties of polyethylene at lower amount reinforcement ratios. Thus, it can be said that HTCs could be alternative carbonaceous reinforcement material for polymer matrix composites.

Keywords

• Hydrothermal carbons
• polyethylene
• wear properties
• composite materials
• mechanical properties.

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