Preparation and characterization studies of modified cellulosic textile fabric composite with in situ-generated AgNPs coating

Abstract

The growing interest of green technology concept in the field of biomedical application provides the thrust for the development of eco-friendly materials. Accordingly, the eco-friendly nanocomposites were prepared using in situ-generated silver nanoparticles (AgNPs) in cotton fabrics with various concentrations of aq. AgNO3 solutions (1–5 mM). All these nanocomposites were developed using Cassia alata leaf extract as a reducing agent through simple immersion process. The resulting nanocomposite cotton fabrics (NCFs) were characterized by SEM, EDX, FTIR spectroscopy, XRD and antibacterial activity tests. During and after the generation of AgNPs, the colour of the matrix changed from light brown to dark brown visually indicating the formation of NCFs. The SEM images and EDX spectra revealed the generation of spherical AgNPs in the size range of 20 nm to 119 nm. The X-ray analysis further confirmed the presence of AgNPs in the NCFs under study. These NCFs exhibited significant antibacterial activity against Escherichia coli bacteria. Further, the NCFs under study also inhibited the growth of bacteria in sewerage water. Based on the antimicrobial activity results, these NCFs can be considered for wound dressing and for biomedical applications.

Development of antibacterial and UV protective cotton fabrics using plant food waste and alien invasive plant extracts as reducing agents for the in-situ synthesis of silver nanoparticles

“…5. The mechanism is adapted from published research on ex-situ and in-situ green synthesis of AgNP (Annavaram et al 2015; Yazdanshenas and Shateri-Khalilabad 2012; Dash et al 2020;Sivaranjana et al 2019). Regardless of the process used for the green synthesis of AgNP, their formation and stabilisation are determined by the biomolecules present in the extract, such as polyphenols and flavonoids.…”

“…is not continued, the nanoparticles will not form even if the fabric remains in the AgNO 3 solution for a few days (Yazdanshenas and Shateri-Khalilabad 2012). Introduction of additional -OH and -COOH groups from biomolecules of plant extracts promotes the synthesis of nanoparticles (Annavaram et al 2015;Sivaranjana et al 2019), and after rinsing with water, the reaction impurities are removed from the surface.…”

In-vitro anticancer activity against Caco-2 cell line of colloidal nano silver synthesized using aqueous extract of Eucalyptus Camaldulensis leaves

“…Silver nanoparticles are widely used in many fields especially at medical and health fields [ 5 ] because of their unique physicochemical, and biological therapeutic properties as antibacterial [ 6 , 7 , 8 ] antiviral [ 9 ], antifungal [ 10 ], anti-inflammatory [ 11 , 12 ] and anticancer [ 13 , 14 ]. Silver nanoparticles have been extensively carried out biomedical areas as treatment of wounds [ 15 ] and burns [ 16 ], water purification [ 17 , 18 ], air filter [ 19 ], textile industry [ 20 , 21 ] and healthcare products. In recent years, many eco-friendly methods [ 22 , 23 ] have been employed in the synthesis of silver nanoparticles using biological materials like bacteria [ 24 , 25 ], fungi [ 26 , 27 ] and plant extracts.…”

Nanocomposite cellulose fabrics with in situ generated silver nanoparticles by bioreduction method

“…Though these nanocomposite films exhibited excellent antibacterial activity, for medical applications such as wound dressing, bed materials, apparels, etc., antibacterial fabrics are necessary. In this direction, recently, our group prepared cellulose/AgNPs fabrics with in situ generated AgNPs by hydrothermal method [15] and also using red sanders powder extract [16] and C. alata leaf extract [17] as reducing agents. However, these nanocomposite fabrics required higher concentrated source solutions to achieve significant antibacterial activity.…”