A green in situ synthesis of silver nanoparticles on cotton fabrics using Aloe vera leaf extraction for durable ultraviolet protection and antibacterial activity

Abstract

This study presented a simple and environmentally friendly method of in situ synthesis of silver nanoparticles (AgNPs) on cotton fabrics for durable ultraviolet (UV) protection and antibacterial activity using Aloe vera leaf extraction (AVE) as a reducing and stabilizing agent. Cotton fabrics were pretreated in water, and then immersed in AgNO3 and AVE, respectively. Cotton fabrics were characterized by small angle X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis, UV protection, antibacterial activity, and laundering durability. Comparing with the smooth surface of the control cotton fabric, SEM and energy dispersive X-ray spectrometry (EDX) results showed that there were a considerable number of Ag2O and AgNPs loading on the surface of the pretreated and Ag loaded cotton fabrics. The XRD pattern indicated, respectively, the existence of Ag2O and AgNPs, the structures of which were similar to JCPDS File No.65-3289 and JCPDS File No. 01-071-4613 on the pretreated and Ag loaded cotton fabrics. The pretreated and Ag loaded cotton fabrics showed excellent UV protection, antibacterial activity, and laundering durability, especially the Ag loaded cotton fabric, of which the UV protection factor value and transmission of UVA were 148 and 1.11%, respectively, after 20 washing cycles, and the clear zone width was more than 4 mm against E. coli or S. aureus. AgNPs facilitated the improvement of the thermal property of the cotton fabrics. Thus this facile in situ reduction of AgNPs with AVE may bring a promising and green strategy to produce functional textiles.

In situ generation of silver and silver oxide nanoparticles on cotton fabrics using Tinospora cordifolia as bio reductant

“…However, the diffractograms of NCCFs showed more intensity than matrix due to the formation of AgNPs. Matrix and AgNPs in NCCFs both resulted peaks at 2θ = 15.1°, 17.2°, 22.7° and 34.6°, corresponding to reflections from (1-10), (101), (002) and (040) planes respectively indicating their cellulose-I structure [37]. To observe the peaks corresponding to the generated silver based nanoparticles, the diffractogram of NCCF (5 mM) was expanded in 2θ = 25° to 80° range, as shown in Fig.…”

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

“…However, there are some studies in which only silver precursors and plant water extracts (i.e. aloe vera, red sanders powder and Keliab stones) were used to produce AgNP directly on cellulosic substrates (Zhou et al 2017;Rao et al 2019;Aladpoosh et al 2014). Although the researchers were successful forming AgNP on textiles and thus produce textiles with good protective properties, the preparation methods were energy and time consuming, such as the preparation of the textiles before synthesis, the longer extraction times of the plants and the treatment of the textiles in precursor or extract solutions at higher temperatures and/or over a longer period of time.…”

In situ generation of antibacterial bimetallic silver and copper nanocomposites using Tinospora cordifolia leaf extract as bio reductant

“…4a. Both matrix and white cloth exhibited similar bands with the planes which are overlapping with each other (not shown in Figure) at 15.04 o (101), 16.71 o (10-1), 22.92 o (002) and 34.41 o (040) related to cellulose -I structure [28]. The intensity of the individual MNCFs was found to be higher than the matrix.…”