Fabrication of CeO2 nanoparticle-modified silk for UV protection and antibacterial applications

J Colloid Interface Sci. 2014 Dec 1:435:8-14. doi: 10.1016/j.jcis.2014.08.015. Epub 2014 Aug 25.

Abstract

To endow silk with UV-shielding ability and antibacterial activity, CeO2 nanoparticles were immobilized on silk surface via a dip-coating approach without changing silk structure. Surface density of the nanoparticles could be easily adjusted by controlling the number of dip-coating cycle. Enhanced thermal stability of the modified silk is exhibited in thermogravimetric analysis (TGA) and derivative thermogravimetric analysis (DTG). The excellent UV-protection ability and antibacterial property of the CeO2 nanoparticle-coated silk are demonstrated in UV-vis diffuse reflectance spectroscopy and colony-forming capability test, respectively. Based on the data, it can be concluded that CeO2 nanoparticles could be used as a very promising coating material to modify silk for UV-protection and antibacterial applications.

Keywords: Antibacterial activity; Cerium oxide nanoparticle; Silk; UV protection.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anti-Bacterial Agents / chemical synthesis
  • Anti-Bacterial Agents / chemistry*
  • Anti-Bacterial Agents / pharmacology
  • Bacteria / drug effects
  • Cerium / chemistry*
  • Colorimetry
  • Microscopy, Electron, Scanning
  • Nanoparticles / chemistry*
  • Silk / chemistry*
  • Surface Properties
  • Ultraviolet Rays*

Substances

  • Anti-Bacterial Agents
  • Silk
  • Cerium
  • ceric oxide