Surface Functionalization of “Rajshahi Silk” Using Green Silver Nanoparticles

Abstract

Abstract:In this study, a novel functionalization approach has been addressed by using sodium alginate (Na-Alg) assisted green silver nanoparticles (AgNPs) on traditional "Rajshahi silk" fabric via an exhaustive method. The synthesized nanoparticles and coated silk fabrics were characterized by different techniques, including ultraviolet-visible spectroscopy (UV-vis spectra), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FT-IR), which demonstrated that AgNPs with an average size of 6-10 nm were consistently deposited in the fabric surface under optimized conditions (i.e., pH 4, temperature 40 • C, and time 40 min). The silk fabrics treated with AgNPs showed improved colorimetric values and color fastness properties. Moreover, the UV-protection ability and antibacterial activity, as well as other physical properties-including tensile properties, the crease recovery angle, bending behavior, the yellowness index, and wettability (surface contact angle) of the AgNPs-coated silk were distinctly augmented. Therefore, green AgNPs-coated traditional silk with multifunctional properties has high potential in the textile industry.

Multifunctional Flax Fibres Based on the Combined Effect of Silver and Zinc Oxide (Ag/ZnO) Nanostructures

“…Flax fabric presents four diffraction patterns that are located at 2θ = 14.92°, 16.68°, 22.96°, and 34.41°, which correspond to the (−1 1 0), (1 1 0), (2 0 0), and (0 0 4) planes, respectively, of crystalline domains of cellulose I [17], the main constituent of NCF. Flax fabric treated with AgNPs clearly demonstrates the appearance of new peaks at 2θ = 38.01°, 44.29°, 64.69°, 77.86°, and 82.14°, which correspond to (1 1 1), (2 0 0), (2 2 0), (3 1 1), and (2 2 2) planes of the face-centered cubic (FCC) lattice of silver [8]. The synthesis of ZnONPs onto this fabric revealed the formation of new peaks at 2θ = 32.21°, 35.09°, 37.05°, 47.61°, 57.33°, and 67.89°.…”

“…Several studies report that AgNPs and ZnONPs exhibit remarkable antibacterial activity against a broad spectrum of bacteria [6,8,9,17,39]. Although the mechanisms underlying the antibacterial activity of these NPs are not yet fully understood, the proposed main ones include the disruption of bacterial cell membrane, induction of ROS production leading to oxidative stress, metal ion release (Ag + and Zn 2+ ), damage to DNA and proteins, among others [39,40,41,42].…”

“…In fact, the synthesis of AgNPs led to higher WCA, demonstrating the increase in the fabrics’ hydrophobicity. Since the PEG polymer is hydrophilic, the increase in WCA is only due to the addition of AgNPs, which contributes to the surface roughness improving the surface hydrophobicity character [8,47]. However, the obtained WCA was around 58°, which means that the fabrics still have hydrophilic properties.…”

“…Nanoparticles (NPs) are very attractive materials to be used in the development of functional fibrous systems, due to their higher surface area and exclusive optical, electrical, and catalytic properties [5,6,7]. Silver (Ag) and zinc oxide (ZnO) NPs exhibit numerous interesting properties, such as antibacterial effect, UV-blocking, piezoresistive properties, electrical conductivity, and photocatalytic activity, being widely used to functionalize different cellulosic fibres [6,8,9,10,11]. Hence, the combined effect of these NPs can be extremely useful for multifunctional materials development.…”

Preparation of Conductive Polyester Fibers Using Continuous Two-Step Plating Silver

“…Plating a layer of silver on the surface of a polyester fiber will preserve the excellent properties of the polyester. Meanwhile, it also has the excellent electrical conductivity [ 10 ], ductility [ 11 , 12 ], catalytic activity [ 13 , 14 ], and antibacterial deodorization properties of metallic silver [ 15 , 16 , 17 , 18 ], and the material can also obtain a certain metallic luster and decorative effect [ 19 , 20 , 21 , 22 ].…”