Synthesis and Characterization of Chitosan-Silver Nanocomposite Film

Abstract

Chitosan is termed as one of the useful carbohydrate oligosaccharides derived from chitin, which can be used to improve film packaging by hybridizing with silver due to their advantages of flexibility, easy scale up and low cost methods. Design of packaging material with non-toxic property becomes key issue. The objective of this work is to synthesize and characterize chitosan-silver nanocomposite film for effective packaging. The nanocomposite was synthesized using in-situ, co-mixing chemical method and air drying method. The morphology integrity of the nanohybrid was confirmed using UV-Visible Spectrophotometer, Transmission Electron Microscope (TEM) and X-ray Diffraction (XRD). TEM analysis revealed the cap shaped spherical morphology with no agglomeration and uniform size distribution of the nanoparticles within the range of 20.00 nm. UV-visible analysis showed Plasmon resonance band at 275 nm and 435 nm indicating the presence of chitosan and silver with no observable peak and an increase in intensity of chitozan. XRD confirmed the order and crystalline peak located at 2θ = 35ᵒ, 64ᵒ and 77ᵒwhich have been keenly indexed as face centred cubic Silver nanocrystals.Thus, the nanocomposite film produced serves as an effective packaging material.

Electrochemical quantification of the levels of hydrogen peroxide in cassava using glassy carbon electrode modified with chitosan/silver nano-hybrid

“…Three strong Bragg reflections were observed at 38.45 °, 46.35 °, 64.75 ° corresponding to the planes of (1 1 1), (2 0 0) and (2 2 0) respectively, indexed according to the face centered cubic crystal structure of silver. These values are in agreement with the values reported in literature (Rhim et al, 2006;Govindan et al, 2012;Olaniyan et al, 2016). The results were corroborated against the Energy Dispersive X-ray spectroscopy (EDX) (figure 3 The HR-TEM images of the synthesized AgNPs (figure 4) indicates that the particles are predominantly spherical in shape with an average particle size of 24.6178 nm as determined from the TEM micrograph.…”

Toward a Green and Sustainable Silver Conservation: Development and Validation of Chitosan-Based Protective Coatings

“…After 30 months of exposure, both the chitosan and chitosan/BTA coatings showed absorption in the region of 400-440 nm. As frequently reported in the literature [37][38][39], nano-sized silver particles have absorption peaks in the visible region from 400 nm to 440 nm, depending on the size and morphology of the parti-cles. These confer from yellow to light red hues to solutions or films containing them [40].…”

Green Synthesis, Hybridization of SiO₂ by Alkaline -Acid Leaching Method and their Optical and Structural Properties Using Rice Husk and <i>Anogeissus leiocarpus</i> Extract

“…6). The nanohybrid formed is more friendly, economical and highly resourceful, compare to other methods [10,23,27,28,31,32,34]. Hybridization improved the silica-silver interaction with better sensing ability or optical enhancement, increase intensity, conductivity with chemically modified structure (fig, 3 and 4), hence, the hybridized silica-silver (AgNPs) is a good industrial material (Fig.…”

“…The alkaline condition of pH 12 indicates approximately the complete precipitation of silica by the reaction below. The resulting silica was then dried in an ovum at 50 ᵒ C. (14,27,31).…”

“…The extracted and nanosized silica were separately mixed with silver nanoparticles solution immediately after nucleation stage of AgNPs, i.e., before the growing stage (the stage after first few seconds, when there were observable colour changes during microwaving) and slurries were stirred constantly for 10mins on a magnetic stirrer using in-situ and co-mixing chemical and microwave assisted methods. The mixture of the white powder silica with silver nanoparticles formed brownish paste, this was allowed to settled at room temperature [26,27,28].…”