Preparation and characterization of nanocomposites based on ecofriendly polymers and their utilization as multi-functional agents

Abstract

The main goal of the current work in this thesis is improvement of existing properties in ecofriendly polymers and preparation of new material properties of polymer composites and utilization of these composites as a multifunctional agent for the physical, mechanical and antibacterial activity of the ecofriendly polymers. There are two routes were used to achieve these enhancements: 1-Preparation, characterization, biological properties of Ncarboxyethylchitosan

and its Potential use in biomedical applications N-carboxyethylchitosan (CECS) was successfully prepared via Michael addition reaction of chitosan (CS) with acrylic acid in water. The structure of CECS was characterized by Fourier transform Infra-Red spectrometry (FT-IR), HNMR, elemental analysis, X-ray diffraction (XRD), thermogravimetric analysis (TGA) and Differential scanning calorimetry (DSC). Antibacterial activity of CECS was evaluated against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) by using minimum inhibition concentration (MIC). The results showed that the prepared CECS soluble in water at wide range of pH values. In addition, it has amorphous character improve its chemical reactivity than CS itself, in addition it has been showed stronger 1 ii