Chemical synthesis of silver nanoparticles and chitosan biocompatible polymer nanocomposites applicable in wound coating

Sorinezami, Ziba and Ghanbari, Davood (2019) Chemical synthesis of silver nanoparticles and chitosan biocompatible polymer nanocomposites applicable in wound coating. Technical Report. University of Zabol.

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Introduction Chitosan is a linear biomedical polysaccharide and it is made by treating the chitin shells of crustaceans with an alkaline substance in excess as a reagent and water as a solvent. It can be used in agriculture as a seed treatment, bio-pesticide that helps plants to fight off fungal infections, wine making, self-healing polyurethane paint coating, antibacterial bandages and deliver drugs through the skin.. Chitosan is hypoallergenic antibacterial and biodegradable and its derivatives have been used in nonviral gene delivery, transfect breast cancer cells, cytotoxicity; hemostatic agents, pain reducing, transport of polar drugs and treat burn wounds. Chitosan has a positive charge under acidic conditions that comes from protonation of its free amino groups which leads to an increase in solubility.Silver nanoparticles have been the subject of extensive research in the frame of nanotechnology, mainly owing to their unique optical properties. Indeed, the free electron gas of Ag such nanoparticles features a resonant oscillation upon illumination in the visible part of the spectrum. The spectral properties of this resonance depend on the constitutive material, the shape of the nanoparticles and its environment. This resonant electronic oscillation is called localized surface plasmon (LSP), and the field of research that studies the fundamentals and applications of LSP is known as nanoplasmonics. Plasmonic nanoparticles can behave as efficient nanosources of heat, light or energetic electrons, remotely controllable by light.Nanostructured silver compounds have achieved great attention, due to their potential applications in different areas of technology such as electronic, sensor, solar cells and photo-catalysts. Nano particles with smaller sizes and larger specific surface areas can shorten the diffusion distance of photo generated carriers transferring to the surface of photo catalysts, and increase the surface catalytic active sites. In this work Ag and Chitosan-Ag nanocomposites were made by a fast chemical procedure by three applicable hydrothermal, sonochemical and microwaves methods in water as a green solvent.

Item Type: Monograph (Technical Report)
Subjects: Q Science > QD Chemistry
Depositing User: Mrs najmeh khajeh
Date Deposited: 16 Oct 2019 04:02
Last Modified: 16 Oct 2019 04:02

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