Antibacterial Titania Nanocomposites

Open Access
Yang , Huilin
Graduate Program:
Master of Science
Document Type:
Master Thesis
Date of Defense:
April 02, 2010
Committee Members:
  • Ayusman Sen, Thesis Advisor
  • antibacterial
  • nanocomposites
  • titania
Titania nanoparticles with antibacterial shells were synthesized by two methods: silane method and atom transfer radical polymerization (ATRP) method. Fourier-transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA) results prove the successful graft of DMAEMA salt polymer chains from the surface of titania nanoparticles. TGA shows that the amount of DMAEMA salt polymer grown from titania by ATRP method is higher than that by silane method. Transmission electron microscope (TEM) measurements and scanning electron microscope (SEM) measurements displays the obtained titania-DMAEMA nanohybrids have a core-shell structure. In addition, the functional nanocomposites demonstrate antibacterial property. We compared the antibacterial effects of titania nanocomposites with different alkyl chain lenghths, and the results show that titania modified by DMAEMA salt polymer with eight carbon alkyl chain have the best antibacterial effects. The synthesized titania nanocomposites have potential application in coatings.