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Development of Novel Poly(Vıny Alcohol)Graphene Nanocomposites

Oluşturulma Tarihi: 23-08-2017

Niteleme Bilgileri

Tür: Tez

Alt Tür: Yüksek Lisans Tezi

Yayınlanma Durumu: Yayınlanmamış

Dosya Biçimi: PDF

Dil: İngilizce

Konu(lar): TEKNOLOJİ,

Yazar(lar): Gözütok, Melike (Yazar),

Emeği Geçen(ler): Türkoğlu Şaşmazel, Hilal (Danışman),




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Anahtar Kelimeler

Electrospun PVA, reduced graphene oxide (rGO), CVD-grown monolayer graphene, MG-63 cell culture, nanocomposites, electrical and thermal applications.


Özet

The aim of this study was to develop nanocomposites by electrospinning with poly (vinyl alcohol) (PVA) and the forms of graphene, reduced graphene oxide (rGO) and Chemical Vapor Deposited (CVD)-grown monolayer graphene, in order to use them in possible applications such as packaging, electrical, thermal and tissue engineering. For this purpose, 2 major different approaches were utilized. First approach was electrospinning of PVA and rGO blend with different rGO contents (0.5 and 1 wt %), while the second approach was electrospinning of PVA solution onto a CVD-grown monolayer graphene. After crosslinking of the nanocomposites, the common characterizations were done by thickness and contact angle (CA) measurements; scanning electron microscopy (SEM), mechanical property and thermogravimetric (TGA) analyses; PBS absorption and shrinkage tests, in vitro degradation and electrical conductivity measurements. Besides, chemical examinations were done via Fourier Transmission Infrared Spectroscopy (FTIR) analyses, crystallinity observations were done with X-ray Diffraction (XRD) and water vapor transmission rate (WVTR) analyses for PVA/rGO nanocomposites while optical microscopy and Raman analyses were performed for PVA electrospun CVD-grown monolayer graphene nanocomposites. The highest fiber diameter belonged to electrospun PVA+0.5 wt% rGO (~388 nm) nanocomposites whereas the lowest fiber diameter was measured for the electrospun PVA mats (~340 nm). On the other hand, the highest electrical conductivity was recorded as ~11 μS.cm-1 for electrospun PVA+1.0 wt% rGO. Additionally cell-material interactions were observed with MG-63vosteosarcoma cell-line. At the end, it was suggested that electrospun PVA+1.0 wt% rGO nanocomposites were highly suitable candidates to be used in possible applications.


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