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Green and facile fabrication of AgNPs@silk for colorful and multifunctional textiles using baicalin as a natural reductant

Zhou, Yuyang, Yang, Zhi-Yi, Tang, Ren-Cheng
Journal of cleaner production 2018 v.170 pp. 940-949
Escherichia coli, Scutellaria baicalensis, Staphylococcus aureus, antibacterial properties, antioxidant activity, baicalin, color, fabrics, nanosilver, particle size, reducing agents, silk, silver nitrate, transmission electron microscopy
The functionalization of silk through nanotechnology is becoming an important research field to prevent fiber damage from microbial attack and improve hygienic aspects. The eco-friendly fabrication of silver nanoparticles (AgNPs)-modified silk using natural extracts has recently gained considerable interests. This study presented a facile method of incorporating AgNPs onto silk using baicalin (a bioactive constituent of Scutellaria baicalensis Georgi) as a natural reductant and a stabilizing agent. The influences of synthesis factors on the yield and particle size of AgNPs were investigated. The color characteristics and functionalities of the AgNPs treated silk were evaluated. The results showed that the yield and particle size of AgNPs were influenced by synthesis conditions. AgNPs were inclined to form in basic condition. The particle size of AgNPs decreased with increasing baicalin and decreasing AgNO3 concentrations. The TEM image showed that AgNPs were predominantly spherical in shape and uniform in size. The functional evaluations revealed that the AgNPs treated silk possessed excellent antibacterial activities against Escherichia coli and Staphylococcus aureus, and certain antioxidant activity. The vitality of this research lies in the sustainable and eco-friendly synthesis of AgNPs using baicalin, which can be successfully applied in the preparation of hygiene-related and medical silk materials.