Tuğçe FİDAN ASLAN, Elif ALYAMAÇ SEYDİBEYOĞLU

Farklı özgül yüzey alanlarına sahip grafen nanoplakalar içeren su bazlı nanoakışkanların termofiziksel ve reolojik özelliklerinin deneysel incelenmesi

Bu çalışmada, farklı özgül yüzey alanlarına (320, 530 ve 800 m2/g) sahip grafen nanoplakalar (GNP) içeren su bazlı nanoakışkanlar hazırlanmıştır. Kütlece %0,5, 1,0 ve 2,0 GNP içeren su bazlı nanoakışkanlar, ultrason teknolojisi kullanılarak üretilmiştir. Nanoakışkan kararlılığının belirlenmesi amacıyla zeta potansiyel ölçümleri yapılmıştır. Reolojik davranışların incelenmesi için geniş kayma hızı aralığında ve farklı sıcaklıklarda viskozite ölçümleri gerçekleştirilmiştir. Hazırlanan nanoakışkanlarda, nanoplakaların özgül yüzey alanının azalmasıyla beraber kayma incelmesi davranışı gözlemlenmiştir ve tüm nanoakışkanlarda sıcaklık artışı ile viskozite azalmıştır. En yüksek ısıl iletkenlik artışı olan %11, ağırlıkça %1,0 oranında 320 m2/g GNP içeren nanoakışkanlarda, 3-omega yöntemi ile ölçülmüştür. Ayrıca, 800 m2/g özgül yüzey alanına sahip GNP içeren nanoakışkanlarda ısıl iletkenlik değerlerindeki artışın en düşük olduğu tespit edilmiştir.

Anahtar Kelimeler:

Grafen Nanoplakalar, reoloji, 3-omega yöntemi, zeta potansiyeli

Experimental investigation of thermophysical and rheological properties of water-based nanofluids containing graphene nanoplatelets with different specific surface areas

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