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Synthesis and Study of Antibacterial and Antifungal Properties of Copper-Polymer Nanocomposites

Fattahi, Behzad | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39205 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Iraji Zad, Azam; Kazemi, Akhtarolmoluk; Mahdavi, Mohammad
  7. Abstract:
  8. Over the last few years, much effort has been directed into developing new materials that have specific antibacterial and antifungal activities that can be used to fight infections and to create sterile conditions. Nanotechnology could become very important in this research field, providing the tools needed to synthesize copper-containing nanomaterials showing an enhanced bioactivity. This nanomaterials have been used in a number of textiles, plastics and ceramics coming on the market in recent years. In this thesis, we synthesized copper-polymer nanocomposites by blending of pre-formed copper nanoparticle into pre-synthesized polymer. We used a new method of nanoparticle preparation by pulsed laser ablation of a metal surface immersed in liquid medium. For practical applications, nanoparticles need to be stabilized. Polymers adsorbed on nanoparticles reveal a stabilizing ability. Copper nanoparticles and Copper-polymer nanocomposites characterized by TEM, SEM, AFM and UV-vis spectroscopy. TEM data showed mean size of copper nanoparticles is about 9 nm and SEM data confirmed that copper nanoparticles uniformly embedded in polymer matrix. Antibacterial and antifungal tests of nanocomposites performed on Gram-positive and Gram-negative bacteria (E.coli,S.aureus) and Fungi (Aspergillus niger). We used some different methods to determine antibacterial and antifungal efficiency of copper-polymer nanocomposites including Halo method, Colony counting, Turbidimetry and evaluation of susceptibility constants of microorganism to copper nanopaticles embedded in polymer matrix. Our results showed that copper nanoparticles have maximum and minimum effects on fungi and Gram-negative bacteria, respectively
  9. Keywords:
  10. Copper Nanoparticles ; Pulsed Laser Ablatia ; Copper Alumina Nanocomposite ; Antibacterial Properties ; Antifungal Properties

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