Send to

Choose Destination
See comment in PubMed Commons below
Carbohydr Polym. 2013 Feb 15;92(2):2128-34. doi: 10.1016/j.carbpol.2012.11.091. Epub 2012 Dec 7.

Tunable green oxygen barrier through layer-by-layer self-assembly of chitosan and cellulose nanocrystals.

Author information

DeFENS - Department of Food, Environmental and Nutritional Sciences, Packaging Division, Università degli Studi di Milano, Via Celoria, 2, 20133 Milano, Italy.


We address the oxygen-barrier properties of a nanocomposite created by layer-by-layer assembly of two biopolymers, chitosan (CS) and cellulose, in nanocrystals form (CNs), on an amorphous PET substrate. We systematically investigated the oxygen permeability, morphology, and thickness of the nanocomposite grown under two different pH combinations and with different number of deposition cycles, up to 30 bilayers. Noticeably, the thickness of each deposited bilayer can be largely tuned by the pH value of the solution, from ~7 up to ~26 nm in the tested conditions. By our analysis, it is reliably concluded that such CS/CNs nanocomposite holds promises for gas barrier applications in food and drug packaging as a clear coating on plastic films and tridimensional objects, improving performance and sustainability of the final packages.

[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center