Simple Way for Ag-NPs Preparation based on Starch Macromolecule

Finding a sustainable, inexpensive way for Ag-NPs synthesis is considered as one of the most important requirements for industrial application. Oxidized starch was prepared using sodium periodate. Oxidized starch (DAS) was characterized by measuring aldehyde content and using FTIR spectroscopy. DAS was used as a reducing and stabilizing agent for the preparation of Ag nanoparticles (Ag-NPs). Factors that may affect the preparation of Ag-NPs including pH, AgNO3/DAS molar ratio, temperature and time, were studied. UV-Vis. spectroscopy and particle size analysis showed that DAS could act as a reducing and stabilizing agent for the preparation of Ag-NPs and the mean particle size was 19 nm. The so prepared Ag-NPs were used as antibacterial agent for cotton fabric using the pad dry cure method. The results of the antibacterial test showed that the presence of Ag-NPs enhanced the antibacterial properties of the treated cotton fabrics.