Preparation and characterization of chitosan-based nanocomposite films with antimicrobial activity.
Four different types of chitosan-based nanocomposite films were prepared using a solvent-casting method by incorporation with four types of nanoparticles, that is, an unmodified montmorillonite (Na-MMT), an organically modified montmorillonite (Cloisite 30B), a Nano-silver, and a Ag-zeolite (Ag-Ion). X-ray diffraction patterns of the nanocomposite films indicated that a certain degree of intercalation was formed in the nanocomposite films, with the highest intercalation in the Na-MMT-incorporated films followed by films with Cloisite 30B and Ag-Ion. Scanning electron micrographs showed that in all of the nanocomposite films, except the Nano-silver-incorporated one, nanoparticles were dispersed homogeneously throughout the chitosan polymer matrix. Consequently, mechanical and barrier properties of chitosan films were affected through intercalation of nanoparticles, that is, tensile strength increased by 7-16%, whereas water vapor permeability decreased by 25-30% depending on the nanoparticle material tested. In addition, chitosan-based nanocomposite films, especially silver-containing ones, showed a promising range of antimicrobial activity.
Rhim
Jong-Whan
JW
Department of Food Engineering, Mokpo National University, Chungkyemyon, Muangun, Chonnam, Republic of Korea. jwrhim@mokpo.ac.kr
Hong
Seok-In
SI
Park
Hwan-Man
HM
Ng
Perry K W
PK
D000890:Anti-Infective Agents; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D048271:Chitosan / Q000737:chemistry; D018857:Food Packaging / Q000295:instrumentation*; D012995:Solubility; D013718:Tensile Strength; D014867:Water
D000890:Anti-Infective Agents; D014867:Water; D048271:Chitosan