International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

UV- Visible, Mechanical and Anti-Microbial Studies of Chitosan - Montmorillonite Clay / TiO2 Nanocomposites

Author Affiliations

  • 1Dept of Chemistry, S.N College for Women, Kollam, Kerala, 691001, INDIA

Res. J. Recent Sci., Volume 4, Issue (ISC-2014), Pages 131-135, (2015)


The development of bio-based nanocomposites are carried out with the intention of providing physical protection for food, improving food integrity, and preventing contamination from microbes and fungi 1,2. Nanocomposites of chitosan, nanoclay (MMT-Na+) and Titanium dioxide (TiO2) were prepared. The UV- Visible analysis of the samples was carried out using UV- Visible Spectrophotometer. Maximum absorbance was observed at 362 nm for 5weight percentage (wt%) MMT and 0.8 TiOloading. From the Tauc,s plot, it was observed that the optical band gap was found to be in the range of 2.9 to 2.2 eV. The refractive index of the material was also calculated. The structural properties were studied using X-ray diffraction (XRD) Transmission electron microscopy (TEM) and Scanning electron microscopy (SEM). XRD and TEM results indicated that an exfoliated structure was formed by the addition of small amount of filler. Antibacterial activity was investigated using gram-negative bacteria and gram- positive bacteria. All have high antibacterial activity. The 30% increase in tensile strength was observed in the case of 5wt% nanofiller loading.


  1. Casariego A., Souza B.W.S., Cerqueira M.A., Teixeira J.A., Cruz L., Diaz R. and Vicente A.A., Chitosan/ clay films, properties as affected by biopolymer and clay micro/nanoparticles concentrations, Food hydrocolloids.,23, 1895-1902 (2009)
  2. Wang S.F., Shen L., Tong Y.J., Chen L., Phang I.Y., Lim P.Q. and Li T.X., Biopolymer chitosan/montmorillonite nanocomosites: Preparation and characterization, Polymer Degradation and Stability., 90, 123-131 (2005)
  3. Pavlidou S. and Papaspyrides C.D., A review on polymer-layered silicate nanocomposites, Prog. Polym. Sci.,33, 1119-1198 (2008)
  4. Hu H., Onyebueke L. and Abatan A., Charecterizing and Modeling Mechanical Properties of nanocomposites- Review and Evaluation, J. of Minerals and Materials Characterization and Engg.,, 275-319 (2010)
  5. Kango S., Kalia S., Celli A., Njuguna J., Habibi Y. and Kumar R., Surface modification of inorganic nanoparticles for organic in-organic nanocomposites, Prog. Polym. Sci.,38, 1232-1261 (2013)
  6. Sun Q., Sun X., Dong H., Zhang Q. and Dong L., Copper quantum dots on TiO: A high-performance, low-cost, and nontoxic photovoltaic material, J Renewable Sustainable Energy., 5, 021413 (2013)
  7. Carneiro J.O., Teixeira V., Nascimento J.H., Neves J. and Tavares P.B., Photocatalytic activity and UV-protection of TiO2 nanocoatings on poly(lactic acid) fibres deposited by pulsed magnetron sputtering., Journal of Nanoscience and Nanotechnology,11, 8979-85 (2011)
  8. Seentrakoon B., Junhasavasdikul B. and Chavasiri W., Enhanced UV protection and antibacterial Properties of Natural Rubber/ Rutile TiO - nanocomposites, Polymer Degradation and Stability., 98, 566-78 (2013)
  9. Kim Y.K. and Min D.H., UV protection of reduced graphene oxide films by TiO Nanoarticle Incorporation, Nanoscale.,, 3638-42 (2013)
  10. Yang H., Zhu S. and Pan N., Studying the mechanisms of Titanium dioxide as ultraviolet-blocking additive for films and fabrics by an improved scheme, Journal of Applied Polymer Science.,92, 3201-10 (2004)