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Title: Water vapor and oxygen barrier properties of extrusion-blown poly(lactic acid)/cellulose nanocrystals nanocomposite films

Source: Composites Part A: Applied Science and Manufacturing. 114: 204-211.

Author(s)Karkhanis, Sonal S.; Stark, Nicole M.; Sabo, Ronald C.; Matuana, Laurent M.

Publication Year: 2018  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4706-1B

Abstract: 

This paper examined the effect of cellulose nanocrystal (CNC) content on water vapor permeability (WVP) and oxygen permeability (OP) of extrusion-blown poly(lactic acid) (PLA) films recorded at various temperatures and relative humidities. While both WVP and OP followed the Arrhenius equation, the WVP decreased with increasing temperature whereas an opposite trend was observed for OP, resulting in negative activation energy (Ep) for WVP but positive Ep for OP, regardless of CNC content. However, the Ep for both WVP and OP increased by adding CNC into PLA matrix. WVP was not affected by the relative humidity agreeing with Fick’s law. Nanocomposite films had lower WVP (∼40%) and OP (∼75%) than neat PLA films because of the tortuosity effect created by the presence of highly crystalline CNCs in the nanocomposites, which increased PLA’s degree of crystallinity. Indeed, the values of WVP and OP negatively correlated with increased crystallinity, irrespective of testing conditions.



Keywords: Biocomposite; nano-structures; permeability; extrusion

Publication Review Process: Formally Refereed

File size: 1,024 kb(s)

Date posted: 09/26/2019

This publication is also viewable on Treesearch:  view
RITS Product ID: 95817
Current FPL Scientists associated with this product (listed alphabetically)
Sabo, Ronald C.
Research Materials Engineer
Stark, Nicole M.
Research Chemical Engineer
 

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