Ayçiçeği Kabuğu Takviyeli Biyo-Epoksi Matrisli Çevreci ve Maliyet Etkin Kompozitlerin Geliştirilmesi ve Mekanik Karakterizasyonu

Yıl 2023, Cilt: 35 Sayı: 4, 494 - 503, 31.12.2023

Asya Nur Sunmaz , Ulaş Doğan , Alaeddin Burak İrez

https://doi.org/10.7240/jeps.1359961

Cited By: 2

Öz

İklim değişikliği, azalan kaynaklar ve artan hammadde maliyetleri, endüstriyi daha sürdürülebilir, uygun maliyetli ve hafif malzemeler yaratmaya itmiştir. Doğal elyaf kompozitler bu bağlamda çelik gibi mevcut geleneksel malzemelerin yerine kullanılabilecek alternatiflerdir. Ayçiçeği kabuğu (SH), diğer birçok doğal elyafın yanı sıra, tarımsal atık olarak kolayca erişilebilir ve avantajlı malzeme özelliklerine sahiptir. Bu çalışmada, biyo-epoksi matrisi ile ayçiçeği kabukları, toz haline getirildikten sonra karıştırılarak kompozitler imal edilmiş ve sonrasında mekanik karakterizasyona tabii tutulmuşlardır. Ayrıca, ayçiçeği kabuklarının NaOH ile yüzey işlemine tabii tutulmasının mekanik performansa etkisi de bu çalışma kapsamında incelenmiştir. Elde edilen sonuçlara göre, SH takviyesi kompozitlerin çekme dayanımını ve kopma uzamasını düşürürken, elastisite modülünü arttırmıştır. NaOH işlemi de mekanik sonuçlarda bir artışı beraberinde getirmiştir. Mekanik karakterizasyondan sonra hasarlı numuneler SEM fraktografisine tabii tutulmuş ve yüzey işlemine tabii tutulmayan numunelerde matris-elyaf ara yüzey problemleri gözlemlenmiştir. Ayrıca liflerin dekohezyonu da ayrı bir hasar mekanizması olarak karşımıza çıkmıştır. Sonuçlar değerlendirildiğinde, bu tip çevreci ve maliyet etkin kompozitler otomotiv sektöründe yapısal olmayan, parçaların üretiminde tercih edilebilir.

Anahtar Kelimeler

Sürdürülebilirlik, doğal elyaf takviyeli kompozitler, biyo-bozunabilir malzemeler, hasar mekanizmaları

Kaynakça

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