Hybrid Nanocomposite from γ-Fe2O3 Nanoparticles Functionalized in the Amazon Oil Polymers matrix

Abstract

<jats:p>In recent years, there was a crescent increase in studies involving hybrid magnetic nanocomposites from renewable resources, because of its importance in the synthesis of new organic biomaterials. Herein, we report a synthesis of Magnetic Nanocomposites (MNCs) from superparamagnetic nanoparticles based on iron oxide of maghemite (γ-Fe2O3) coated by a polymeric matrix. In this study, we used γ-Fe2O3 which are prepared using co-precipitation method, where salts with ions Fe+2 and Fe+3 are dissolved in distilled water and stirred until they reach about 60 ° C. Shortly after the mixture is add a solution of NH4OH. After this step, the magnetite solute (Fe3O4) is left in oxidizing solution, thus forming nanoparticles of γ-Fe2O3. For activation of the functional groups and extraction of the polymer we used polycondensation method, wherein the oil extracted from Carapa Guianensis Aubl. is diluted in ethylene glycol (C2H6O2). After that, the mixture undergoes processes: hydrothermal and isobaric-isothermal. Then, purification was performed polymer, thus obtaining a polymer of natural oil. The nanoparticles was coated for the polymeric matrix using dispersion method and freeze drying, thereby forming a hybrid MNCs ready for characterization. For the samples characterization was utilized X-ray diffraction (XRD) and spectroscopy: UV-Vis, Fourier Transform Infrared (FTIR), EDX and PAS. The results indicate that magnetic-polymeric nanocomposites structure formed was type core/shell, wherein the core was formed γ-Fe2O3 nanoparticles, coated by the polymer matrix, which presents some characteristics of the natural oil used in their synthesis. In recent years, there was a crescent increase in studies involving hybrid magnetic nanocomposites from renewable resources, because of its importance in the synthesis of new organic biomaterials. Herein, we report a synthesis of Magnetic Nanocomposites (MNCs) from superparamagnetic nanoparticles based on iron oxide of maghemite (γ-Fe2O3) coated by a polymeric matrix. In this study, we used γ-Fe2O3 which are prepared using co-precipitation method, where salts with ions Fe+2 and Fe+3 are dissolved in distilled water and stirred until they reach about 60 ° C. Shortly after the mixture is add a solution of NH4OH. After this step, the magnetite solute (Fe3O4) is left in oxidizing solution, thus forming nanoparticles of γ-Fe2O3. For activation of the functional groups and extraction of the polymer we used polycondensation method, wherein the oil extracted from Carapa Guianensis Aubl. is diluted in ethylene glycol (C2H6O2). After that, the mixture undergoes processes: hydrothermal and isobaric-isothermal. Then, purification was performed polymer, thus obtaining a polymer of natural oil. The nanoparticles was coated for the polymeric matrix using dispersion method and freeze drying, thereby forming a hybrid MNCs ready for characterization. For the samples characterization was utilized X-ray diffraction (XRD) and spectroscopy: UV-Vis, Fourier Transform Infrared (FTIR), EDX and PAS. The results indicate that magnetic-polymeric nanocomposites structure formed was type core/shell, wherein the core was formed γ-Fe2O3 nanoparticles, coated by the polymer matrix, which presents some characteristics of the natural oil used in their synthesis.</jats:p>

Raman and FTIR spectroscopy experimental and theoretical in magnetic nanoemulsion from Carapa Guianensis Aublet

“…The CGEO was obtained from a producers cooperative (Associac ¸ão de Produtores Agroextrativistas da Colônia do Sardinha, Lábrea-AM, Brazil). The essential oil-based polymer was synthesized using the polycondensation technique, where the triglyceride chain was broken using 1N Koh and free fatty acids polymerized using the ligand monomer C 2 H 6 O 4 [28][29][30][31]. The nanoparticles were synthesized by a chemical precipitation technique using 1:2 FeCl 3 -6H 2 O and FeCl 2 -4H 2 O [32,33].…”