Synthesis and characterization of chitosan based silver nano composite system for antibacterial applications

摘要

An attempt has been made in the present work to Synthesize a new bio polymer (Chitosan) based Solid silver colloid nano composite system by chemical facile method. In the present research article the silver colloid was produced by chemical reduction of silver salt (silver nitrate AgNO3) solution and sodium citrate was used as a reducer. Several experimental techniques such as infrared radiation (IR), XRD, UV-Visible and FT-IR measurements were employed to characterize this bio polymer nano composite system. The IR studies confirm the salvation of Ag(0) nano particles with chitosan. UV-VIS spectrometry indicated formation of nanoparticles. The surface Plasmon resonance peak in absorption spectra of silver colloidal solution showed absorption maximum at 433 nm. Whereas XRD and FTIR studies revealed that the complexation of the host bio polymer chitosan with dispersed silver nano particles. A preliminary characteristic which allows us to realize the size of formed silver nano particles was made on the basis of the measurements of UV-VIS absorption and FT-IR. These developed films shows enhanced optical properties desired for antibacterial and biomedical applications.