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Development of Novel Poly(Vıny Alcohol)Graphene Nanocomposites

BROWSE_DETAIL_CREATION_DATE: 23-08-2017

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BROWSE_DETAIL_TYPE: Thesis

BROWSE_DETAIL_SUB_TYPE: Masters

BROWSE_DETAIL_PUBLISH_STATE: Unpublished

BROWSE_DETAIL_FORMAT: PDF Document

BROWSE_DETAIL_LANG: English

BROWSE_DETAIL_SUBJECTS: TECHNOLOGY,

BROWSE_DETAIL_CREATORS: Gözütok, Melike (Author),

BROWSE_DETAIL_CONTRIBUTERS: Türkoğlu Şaşmazel, Hilal (Advisor),




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


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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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