Grafen, karbon nanoşerit ve karbon nanofiber takviyeli nanokompozitlerin termal ve mekanik özellikleri

Öz

Bu çalışma, grafen nanoplaketler (GNP), karbon nano şeritler (CNR) ve karbon nanofiberler (CNF) ile takviye edilen epoksi nanokompozitlerin termomekanik özelliklerini araştırmaktadır. Nanodolgu maddeleri, 50 µm boşlukta beş karıştırma döngüsüne sahip üç silindirli öğütme cihazı kullanılarak havacılık sınıfı epoksi içerisine dağıtılmıştır. FTIR analizi, nanomalzemelerin polimer matrisi içerisine başarılı bir şekilde entegre edildiğini doğrulamıştır. Üç nokta eğilme testleri, %0,5 GNP ve %0,2 CNF ilavesinin eğilme mukavemetini %30’a kadar artırdığını göstermiştir. SEM görüntüleri, GNP ve CNF'nin homojen dağıldığını doğrularken, CNR’nin aglomerasyona neden olarak dayanımı azalttığını ortaya koymuştur. TGA sonuçları, GNP’nin bozunma sıcaklığını artırarak termal kararlığı iyileştirdiğini, CNF’nin ise ihmal edilebilir bir etki gösterdiğini ortaya koymuştur. DSC analizleri, tüm nanomalzeme katkılarında cam geçiş sıcaklığında (Tg) azalma olduğunu belirtmiştir. Genel olarak çalışma, GNP ve CNF ile güçlendirilmiş epoksi nanokompozitlerin gelişmiş eğilme mukavemeti ve termal kararlılık gösterdiğini ve bunları havacılık uygulamaları için umut verici adaylar haline getirdiğini göstermektedir.

Anahtar Kelimeler

• Epoksi nanokompozitler
• Grafen
• Üç silindirli öğütme
• Termomekanik özellikler
• Havacılık uygulamaları

Destekleyen Kurum

TÜBİTAK

Proje Numarası

5189901

Etik Beyan

Yazarlar, bu makalede bildirilen çalışmayı etkilemiş olabilecek bilinen herhangi bir çıkar çatışması veya kişisel ilişkiye sahip olmadıklarını beyan ederler.

Teşekkür

Yazarlar, değerli görüşleri için M. Özkutlu Demirel, Ö. Ağac ve M. B. Öztürkmen'e teşekkür ederler. TÜBİTAK'ın 1004 ve 1515 numaralı programları kapsamında 20AG001 ve 5189901 numaralı projelerle sağladığı mali desteği de teşekkür ederler.

Thermal and mechanical properties of graphene, carbon nanoribbon and carbon nanofiber reinforced nanocomposites

Öz

This research focuses on examining the thermomechanical behavior of epoxy-based nanocomposites that are enhanced with graphene nanoplatelets (GNP), carbon nanoribbons (CNRs), and carbon nanofibers (CNFs). Nanofillers were dispersed into aerospace-grade epoxy using three roll milling with five mixing cycles at a 50 µm gap. FTIR analysis confirmed successful integration of nanomaterials within the polymer matrix. Three-point flexural tests showed that adding 0.5 wt% GNP and 0.2 wt% CNF increased flexural strength by up to 30%. SEM results confirmed homogeneous distribution of GNP and CNF, whereas CNR caused agglomeration and decreased strength. TGA revealed that GNP improved thermal stability by increasing decomposition temperature, while CNF showed negligible effect. DSC indicated a decrease in glass transition temperature with all nanomaterial additives. Overall, the study demonstrates that epoxy nanocomposites reinforced with GNP and CNF exhibit enhanced flexural strength and thermal stability, making them promising candidates for aerospace applications

Anahtar Kelimeler

• Epoxy nanocomposites
• Graphene
• Three roll milling
• Thermomechanical properties
• Aerospace applications

Destekleyen Kurum

Scientific and Technological Research Council of Türkiye

Proje Numarası

5189901

Etik Beyan

Authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Teşekkür

Authors thank M. Ozkutlu Demirel, O. Agac and M. B. Ozturkmen for valuable discussions. They acknowledge financial support by the Scientific and Technological Research Council of Turkey within the Programs 1004 and 1515 with numbers 20AG001 and 5189901, respectively.

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