Facile and Eco-Friendly Fabrication of Colored and Bioactive Silk Materials Using Silver Nanoparticles Synthesized by Two Flavonoids

Abstract

Recently, there has been an increasing tendency towards the functionalization of silk using silver nanoparticles (AgNPs) to inhibit bacterial multiplication and disease spread. Considering environmental factors and sustainable development, the preparation of AgNPs using natural extracts is becoming a research hotspot. This study aims at fabricating colored and bioactive silk fabric using AgNPs synthesized by two representative flavonoids (quercetin and rutin). The effects of pH, temperature, and flavonoid concentration on the yield and particle size of AgNPs were studied. The color features and functionalities of the AgNPs-treated silk were also evaluated. The results showed that the AgNPs synthesized by quercetin were generated faster but displayed poorer size uniformity than those prepared by rutin. The as-prepared AgNPs showed good stability. The AgNPs prepared by rutin displayed a more uniform distribution on silk than those synthesized by quercetin. The antibacterial activity of AgNPs-treated silk remained over 90% against E. coli and S. aureus even after 30 washing cycles. The antioxidant activity of the treated silk gradually decreased during washing. The present research proposes a facile and eco-friendly method for the preparation of AgNPs-coated silk material using flavonoids, which can serve as hygiene-related and medical textile materials.

Fabrication of Interconnected Plasmonic Spherical Silver Nanoparticles with Enhanced Localized Surface Plasmon Resonance (LSPR) Peaks Using Quince Leaf Extract Solution

“…It was determined in more advanced research that quince leaf extracts are essentially made up of polyphenols that are enriched by functional groups like OH [52,53]. Therefore, on the basis of earlier studies [44,45,48,54] and FTIR analysis of the current study, Figure 3 presents the suggested scheme for silver ion reduction using the flavonoids of quercetin of quince leaf extract solution. Using density functional theory (DFT) analysis, it was shown in an earlier study that there are lower O–H bond dissociation energies of –OH groups of the catechol moiety of flavonoids of quercetin of quince leaf extract solution compared to other –OH groups existing in flavonoids [48].…”

“…Hence, Ag +1 cation reduction is coupled with the oxidation of hydroxyl group of polyphenols [55]. Commonly, the Ag NPs formation mechanism in the existence of flavonoids lies at the group of diorthohydroxyl in their B-ring that enhances the Ag +1 cation reduction to Ag NPs via the release of two electrons [54].…”

Silk Polymers and Nanoparticles: A Powerful Combination for the Design of Versatile Biomaterials

“…In situ NP synthesis in silk materials has also been developed using caffeic acid, flavonoids, vitamin C, citrate, Rhizophora apiculata leaf extracts, Streptomyces cell extracts or honeysuckle extracts as reducing agents (Dhas et al, 2015 ; Meng et al, 2016 ; Shahid et al, 2017 ; Zhou and Tang, 2018a , b ; Baygar et al, 2019 ; Gao et al, 2019 ). The materials acquired antibacterial activities and showed no cytotoxic effects.…”

Adsorption, Antibacterial and Antioxidant Properties of Tannic Acid on Silk Fiber

“…The microbial growth and multiplication cause the generation of fetid odors and mildew, the deterioration and discoloration of silk fiber, skin infection, and allergic responses [2]. A series of synthetic and natural antibacterial agents have been applied in the antibacterial treatment of silk, including quaternary ammonium compounds [13], inorganic nano-materials [14], chitosan [15,16], and natural bioactive compounds [3,17]. On the other hand, the active ingredients of natural plant extracts (e.g., curcumin, baicalin, quercetin, rutin, and chlorogenic acid) have been used to upgrade the antioxidant property of silk [3,8,18,19].…”