SYNTHESIS AND STABILIZATION OF COPPER NANOPARTICLES IN CHITOSAN CONDITIONS

Due to the fact that nanomaterials have unique and more useful physical, chemical and biological properties than their macro compounds, metal nanoparticles have a wide range of applications in recent years. Thus, scientists are interested it because the synthesis of metal nanoparticles stabilized in the natural polymer environment and their application in medicine, catalysis and many other fields. Chitosan, which belongs to the group of natural polymers and distinguished by its superior properties, has been studied in deeply. These advantages include unique properties such as non-toxicity, biocompatibility, antibacterial and antifugal activity [1, 2]. Consider all these, in the study biocomposites with metal nanoparticles were obtained using chitosan. Copper metal nanoparticles are immobilized in a natural polymer chitosan. For this purpose, firstly, chitosan, a natural polymer, was quaternized with benzyl chloride in an acidic environment [3]. Immobilization of copper metal nanoparticles to the obtained compound was carried out as follows. At this time, the quaternized chitosan is mixed in 0. 3 ml of acetic acid until it is completely dissolved. When the solution was homogeneous, 0. 58 g of CuSO4 * 5H2O (30% of the polymer) was added to the solution and left overnight after mixing. In 30% of the metal, 0. 62 g of reducing agent NaBH4 is added to the blue solution, and reduce Cu2+ ions to Cu0. In this case, the color changes from blue to black. After the reduction process is completed, the cross-linking agent N, N’-methylene bis-acrylamide is added to the solution. The resulting product is dried, washed several times with distilled water, removed of additives and then it was cross-link by UV rays at 90 °C for 3-4 hours. The obtained product was studied by IR spectroscopy. The result obtained were studied by IR spectroscopy method and determined that the instead of the 1458 cm -1 absorbtion band in the pure chitosan (Fig. 1) a 1559 cm-1 absorbtion band is formed in the spectrum of the quaternized (30 %) chitosan (Fig. 2)