INCORPORATION OF SILVER NANOPARTICLES INTO FLEXIBLE POLYAMIDE MEMBRANES

Purpose: The use and development of nano-sized nanoparticulate materials is a technology in which it is revolutionizing areas of interest. The metallic silver nanoparticles have been described in literature as more efficiency compared to silver ions in several applications, such as optical, magnetic, catalytic and antimicrobial activities. Methods: In this work presents the study of the incorporated silver nanoparticles in flexible polyamide 12 membranes obtained by additive manufacture. The flexible membranes were previously treated with acetic acid to active the surface and provide the interaction with the NPs. The synthesis was carried out by the chemical reduction route using sodium borohydride as reducing agent to obtain particles with morphology and size of interest. The characterizations were used to the vibrational spectroscopies in the infrared and Raman regions, to identify the size and structure of the nanoparticles were obtained through ultraviolet-visible electronic spectroscopy and X-ray diffraction respectively. The membranes were placed in silver nitrate solution at 10 -3 , 10 -4 , and 10 -5 mol.L -1 , under stirring the reducer agent were add. The membranes were washed and dried at 60 o C. Results:  The absorption spectra present intense band with maximum in turn of 400 nm, indicating particles size range 5 to 10 nm, the electronic spectroscopy confirm the presence of the silver nanoparticles into membranes. Conclusion: The X-rays confirmed with peak at 2q = 38, 44 and 64, cubic phase [1]. The polyamide membrane obtained by additive manufactura presents possible applications as curatives with antimicrobial activities. Keywords: Additive Manufacture , Nanoparticles, Antibacterial, Concentration Effect. Acknowledgments: FAPESP, CAPES CNPq. [1] R. Del Colle, R. N. Haneda, E. Longo, M. J. Godinho, S. R. Fontes, Cerâmica 54 (2008) 21-28.