Synthesis of Chitosan-Silver Nanocomposite and Its Evaluation as an Antibacterial Coating for Mobile Phone Glass Protectors

Abstract

An easy and environment-friendly route for antibacterial coating suited for mobile phone glass protectors was successfully demonstrated. In this route, freshly prepared chitosan solution in 1% v/v acetic acid was added with 0.1 M silver nitrate solution and 0.1 M sodium hydroxide solution and incubated with agitation at 70 °C to form chitosan-silver nanoparticles (ChAgNPs). Varied concentrations of chitosan solution (i.e., 0.1, 0.2, 0.4, 0.6, and 0.8% w/v) were used to investigate its particle size, size distribution, and later on, its antibacterial activity. Transmission electron microscope (TEM) imaging revealed that the smallest average diameter of silver nanoparticles (AgNPs) was 13.04 nm from 0.8% w/v chitosan solution. Further characterizations of the optimal nanocomposite formulation using UV−vis spectroscopy and Fourier transfer infrared spectroscopy were also performed. Using a dynamic light scattering zetasizer, the average ζ-potential of the optimal ChAgNP formulation was at +56.07 mV, showing high aggregative stability and an average ChAgNP size of 182.37 nm. The ChAgNP nanocoating on glass protectors shows antibacterial activity against Escherichia coli (E. coli) at 24 and 48 h of contact. However, the antibacterial activity decreased from 49.80% (24 h) to 32.60% (48 h).

Silver Nanoparticles-Chitosan Nanocomposites: A Comparative Study Regarding Different Chemical Syntheses Procedures and Their Antibacterial Effect

“…Both AgNPs-CH nanocomposites show a shift of the chitosan peak from 1544 cm −1 to 1636 cm −1 due to interactions formed between chitosan and AgNPs. These shifted peaks are associated with bending N-H vibrations from -NH 2 amine groups [ 68 , 71 , 72 , 73 ], a result which suggests the interaction between chitosan and AgNPs. This stretching may appear due to the electrostatic interaction of Ag with the -NH 2 group of chitosan [ 70 ].…”

An Overview of Polymer Composite Films for Antibacterial Display Coatings and Sensor Applications

“…Furthermore, this hydrophobic attribute offers anti-fingerprinting functionality when applied to touchscreens. Moreover, high transmittance, antireflective capabilities, and robust mechanical durability are prerequisites for touchscreen displays [ 69 , 70 ]. Thus, there is significant interest in developing antimicrobial coating materials that encompass additional traits like transmittance, hydrophobicity, and mechanical properties.…”

“…In the study by Canama et al [ 70 ], some sugars were used in a composite with antibacterial materials to improve their performance. The authors successfully demonstrated an environmentally friendly method for antibacterial coating on mobile phone glass protectors using chitosan–silver nanoparticles (ChAgNPs).…”

Catalytic investigation of hyaluronic acid-stabilized Ag nanoparticles as non-toxic nanocatalysts in the oxidation of morin

“…Carbohydrate polymers such as hyaluronic acid, chitosan, alginate, and cellulose are widely used as capping agents during the synthesis of AgNPs because these polymers are generally considered to be chemically stable, nontoxic, biocompatible, and biodegradable. 15,[26][27][28][29][30][31][32][33][34][35][36][37][38] Among them, hyaluronic acid-capped AgNPs (HA-AgNPs) have attracted a great deal of attention due to their unique properties and have been studied in different research areas such as antibacterial coating, in vivo imaging, wastewater treatment, drug delivery, sensing, and cancer therapy. [39][40][41][42][43][44][45][46][47][48] Even though several research papers have been published on HA-AgNP-based bioactive materials, there are currently no reports on the catalytic investigation of HA-AgNPs as biocompatible and nontoxic catalysts in catalytic oxidation processes.…”