Crosslinkable-Chitosan-Enabled Moisture-Resistant Multilayer Gas Barrier Thin Film. Academic Article uri icon


  • Chitosan-based films exhibit good oxygen barrier that degrades when exposed to high humidity. In an effort to overcome this drawback, a multilayer nanocoating consisting of crosslinkable chitosan (CHQ) and poly(acrylic acid) [PAA] is deposited on polyethylene terephthalate (PET) using layer-by-layer assembly. Chitosan is functionalized with glycidyl methacrylate to introduce acrylic functionalities within the film. The deposited films are crosslinked using a free radical initiator and this crosslinking is confirmed by FTIR and reduced film thickness. A 10-bilayer (BL) crosslinked CHQ/PAA film, which is only 165nm thick, results in a 36 reduction of the oxygen transmission rate of PET at 90% relative humidity. To achieve these same results without crosslinking, a 15-BL unmodified chitosan (CH)/PAA film, which is almost 5 thicker, must be deposited on PET. This environmentally friendly, transparent nanocoating is promising for food packaging or protection of flexible electronics, especially in high-humidity environments.

published proceedings

  • Macromol Rapid Commun

altmetric score

  • 4.3

author list (cited authors)

  • Lazar, S., Garcia-Valdez, O., Kennedy, E., Champagne, P., Cunningham, M., & Grunlan, J.

citation count

  • 17

complete list of authors

  • Lazar, Simone||Garcia-Valdez, Omar||Kennedy, Emily||Champagne, Pascale||Cunningham, Michael||Grunlan, Jaime

publication date

  • March 2019