Green chemistry based in-situ synthesis of silver nanoparticles for multifunctional finishing of chitosan polysaccharide modified cellulosic textile substrate

Herein, a highly efficient multifunctional cotton fabric was developed based on a greener approach involving one step in-situ generation of silver nanoparticles (AgNPs) onto chitosan coated cotton (CS-cotton) by employing peanut waste shell extract (PSE) as an eco-friendly reducing agent. Major characteristics of the so prepared in-situ AgNPs@ chitosan-cotton viz size distribution of the particles, surface morphology, binding interaction were analysed by TEM-DLS, SEM, EDX-mapping, and FT-IR techniques. Colour spectrometry was used to measure colour parameters in terms of CIELa*b* values in order to realize the dyeing properties of silver nanoparticles onto chitosan coated cotton. The AgNPs deposited finished cotton samples were evaluated for antioxidant activity using 2, 2'-diphenyl-1-picrylhydrazyl radical (DPPH) assay, and antimicrobial tests were carried out using colony counting method against E. coli and S. aureus pathogens. Based on the obtained data, it was concluded that in-situ synthesis of AgNPs using peanut shell extract biomolecules produce cellulosic fabric with beautiful pale to deep yellowish hues, good antioxidant and excellent antibacterial properties. The tentative mechanism of AgNPs formation onto chitosan coated cotton was also reported. (C) 2019 Elsevier B.V. All rights reserved.