Transparent Antibacterial Films

  • Author:
  • Published: 05 December 2015
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
  • Source / Publisher: Journal of Applied Polymer Science/John Wiley & Sons
thumbnail image: Transparent Antibacterial Films

Biopolymers can be used as sustainable and functional films for medical applications and food packaging. Their mechanical, optical, and chemical properties need to be tailored to the respective application. Chitosan, the N-deacetylation product of chitin (found, e.g., in the shell of shrimps), has promising characteristics such as antimicrobial activity and optical transparency. It does, however have drawbacks, namely poor thermal and UV stability.

Abdolreza Simchi and colleagues, Sharif University of Technology, Tehran, Iran, have developed flexible, transparent, and antimicrobial films by combining chitosan with polyvinylpyrrolidone (PVP) and graphene oxide (GO) nanosheets. The films were prepared by combining solutions of chitosan and PVP with a suspension of the GO nanosheets and slowly evaporating the solvent in Petri dishes over a period of 48 hours.

The resulting films contained up to 50 vol% PVP and 1–3 % GO by weight. The optical properties could be tuned, more PVP made the films more transparent. The films showed improved thermal stability over pure chitosan, as well as high water permeabilty. The antimicrobial effect was tested with Staphylococcus aureus and Escherichia coli, and the film showed high antibacterial capacity, caused by the chitosan and graphene oxide components.


Article Views: 2799

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from, please contact us first for permission and consult our permission guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH