Fabrication of Copper Sulfide Nanoparticles and Limonene Incorporated Pullulan/Carrageenan-Based Film with Improved Mechanical and Antibacterial Properties

Polymers
Swarup Roy, Jong-Whan Rhim

Abstract

Edible biopolymer (pullulan/carrageenan) based functional composite films were fabricated by the addition of copper sulfide nanoparticles (CuSNP) and D-limonene (DL). The DL and CuSNP were compatible with the pullulan/carrageenan biopolymer matrix. The addition of CuSNP significantly increased the UV-blocking properties without substantially reducing the transparency of the film. The addition of CuSNP improved the film's tensile strength by 10%; however, the DL addition did not significantly influence the strength, while the combined addition of CuSNP and DL increased the strength by 15%. The addition of the fillers did not significantly affect the thermal stability of the film, but the water vapor barrier property was slightly improved. There was no significant change in the moisture content and hydrophobicity of the composite film. Besides, the composite film showed some antimicrobial activity against food-borne pathogenic bacteria. The fabricated pullulan/carrageenan-based film with antimicrobial and UV-barrier properties is likely to be used in active food packaging applications.

References

Apr 30, 1998·Advances in Colloid and Interface Science·E A Vogler
Aug 5, 2017·Science Advances·Roland GeyerKara Lavender Law
Nov 23, 2018·The Science of the Total Environment·Ksenia J GrohJane Muncke
Jan 15, 2019·Colloids and Surfaces. B, Biointerfaces·Swarup Roy, Jong-Whan Rhim
Jan 25, 2020·International Journal of Biological Macromolecules·Swarup Roy, Jong-Whan Rhim
Jul 25, 2020·Science·Winnie W Y LauJames E Palardy

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