SEMA VURAL, Aysel ALPHAN, SÜLEYMAN KÖYTEPE, TURGAY SEÇKİN

PVP-AŞILANMIŞ NiFe2O4 NANO PARÇACIKLARININ YÜZEY POLİMERİZASYONU TEKNİĞİ İLE SENTEZİ

Nikel ferrit nano parçacıkları, surfaktant destekli hidrotermal teknik kullanılarak, kontrollü parçacık boyutu ve boyut dağılımı ile sentezlenmiştir. Manyetik nano parçacıkların yüzey modifikasyonu (3-chloropropyl)triethoxysilane ile gerçekleştirilmiştir. Modifiye edilen nano parçacıklar yüzeyden başlatılan polimerizasyon tekniği kullanılarak PVP ile aşı polimer yapısında kaplanmıştır. Elde edilen spinel ferritlerin kristal yapısı ve boyutu X-Işını Kırınım Analizi (XRD) ve Taramalı Elektron Mikroskopu (SEM) ile araştırılmıştır. Nano parçacıkların ve nano kompozitlerin manyetik özellikleri Titreşimli Örnek Magnetometresi (VSM) kullanılarak incelenmiştir. Elde edilen NiFe2O4 nano parçacıklarının ortalama parçacık boyutu 24 nm’dir. Oda sıcaklığında süper paramagnetik karakter ve yüksek doygunluk manyetizasyonu göstermektedir. Gerçekleştirilen sentez stratejisinin biyouygulamalarda kullanılacak gelişmiş malzemelerin sentezinde etkili bir yöntem olabileceği düşünülmektedir.

Synthesis of PVP-grafted NiFe2O4 Nanoparticles with the Surface Initiated Polymerization Technique

Nickel ferrite nanoparticles have been synthesized using the surfactant assistant hydrothermally technique with well controlled particle size and size distribution. The surface modification of magnetic nanoparticles was achieved using (3-chloropropyl)triethoxysilane. Modified nanoparticles were grafted with PVP using surface initialized radical polymerization. Crystal structure and crystallite size of the produced spinel ferrites were investigated by X-ray diffraction analysis (XRD) and scanning electron microscope (SEM). The magnetic properties of nanoparticles and nanocomposite were examined using a vibrating sample magnetometer (VSM). The NiFe2O4 nanoparticles with average size of 24 nm, were exhibited superparamagnetism and high saturation magnetization at room temperature. The synthesized strategy is thought to be an effective method in the synthesis of advanced materials to be used in bio-applications.

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