Technological watch

Combined effects of clay minerals and polyethylene glycol in the mechanical and water barrier properties of carboxymethylcellulose films

Carboxymethylcellulose (CMC), a biopolymer with good film-forming abilities, has rather poor mechanical and water vapor barrier properties which restrict its use in potential food packaging applications. Aiming to improve these properties, CMC was therefore modified by the addition of polyethylene glycol (PEG) and sodium-based clay nanofillers. The results showed the combined action of PEG and sodium montmorillonite greatly improved the tensile mechanical properties of CMC, increasing simultaneously its modulus (up to 260%), strength (up to 250%) and elongation (up to 300%). The barrier effect promoted by the clay nanoplatelets in combination with PEG also resulted in an almost fivefold decrease in water vapor permeability. With these improvements, the use of CMC in edible food packaging applications becomes more feasible.

Publication date: 15/11/2019

Author: Ana Paula Santos de Melo Fiori, Paulo Henrique Camani, Derval dos Santos Rosa, Danilo Justino Carastan

Reference: 10.1016/j.indcrop.2019.111644

Industrial Crops and Products


This project has received funding from the Bio Based Industries Joint Undertaking under the European Union’s Horizon 2020 research and innovation programme under grant agreement No 837761.