Abstract
Silk sericin (SS) was used as both a 3-dimensional matrix and reductant for the in situ synthesis of silver nanoparticles (AgNPs) finished on silk fabrics. We demonstrated enhanced UV protection and antibacterial properties using this synthesis which was an environmental friendly approach. Development and optimization was achieved using a central composite design (CCD) in conjunction with the response surface methodology (RSM). The goal was to identify the concentrations of SS and AgNO3 that produced the optimal balance between UV protection and antibacterial activity, when tested against E. coli and S. aureus. The SS-AgNP bio-nanocomposites were characterized using Scanning Electron Microscope (SEM-EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR). Statistical analyses indicated an empirical second-order polynomial could accurately model the experimental values. To confirm that the optimal levels from RSM worked in practice, performance evaluations were conducted, including tests of cytotoxicity, of the durability and stability of UV protection, as well as of the antibacterial activity of the functionalized fabrics after repeated standard washing. The results suggest that these bio-nanocomposites have great potential for multi-functionalization on silk fabrics. Our method has been shown to convert the waste material (SS) to a fabric with high added value.
Highlights
Ultraviolet (UV) protection finishing of fibers or fabrics has received much attention.Long-term exposure to UV light can lead to a series of negative health effects; for instance, acceleration of skin ageing, photodermatosis, erythema, and even severe skin cancer [1].Other than drastically avoiding exposure to sun light, the most frequently recommended form of UV protection is the use of sunscreens, hats, and proper selection of clothing
The goal was to identify the concentrations of Silk sericin (SS) and AgNO3 that produced the optimal balance between UV protection and antibacterial activity against two strains of bacteria: Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), using response surface methodology (RSM)
To confirm that these optimal levels from RSM worked in practice, performance evaluations were conducted, including tests of cytotoxicity, of the durability and stability of UV protection, and of the antibacterial activity of the functionalized fabrics after repeated standard washing
Summary
Ultraviolet (UV) protection finishing of fibers or fabrics has received much attention. This paper presents a simple, economical, non-toxic, and environmental friendly process for imparting UV and antibacterial properties to silk fabrics. This involved the in situ synthesis of AgNPs using SS as a reducing agent, stabilizer, and binder. The goal was to identify the concentrations of SS and AgNO3 that produced the optimal balance between UV protection and antibacterial activity against two strains of bacteria: Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), using response surface methodology (RSM) To confirm that these optimal levels from RSM worked in practice, performance evaluations were conducted, including tests of cytotoxicity, of the durability and stability of UV protection, and of the antibacterial activity of the functionalized fabrics after repeated standard washing
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