Performance evaluation of cassava starch-zinc nanocomposite film for tomatoes packaging

  • Adeshina Fadeyibi | adeshinaf601@gmail.com Department of Agricultural and Biological Engineering, Kwara State University, Malete, Nigeria.
  • Zinash D. Osunde Department of Agricultural and Bioresources Engineering, Federal University of Technology Minna, Nigeria.
  • Evans C. Egwim Department of Biochemistry, Federal University of Technology Minna, Nigeria.
  • Peter A. Idah Department of Agricultural and Bioresources Engineering, Federal University of Technology Minna, Nigeria.

Abstract

Biodegradable nanocomposite films are novel materials for food packaging because of their potential to extend the shelf life of food. In this research, the performance of cassava starch-zincnanocomposite film was evaluated for tomatoes packaging. The films were developed by casting the solutions of 24 g cassava starch, 0-2% (w/w) zinc nanoparticles and 55% (w/w) glycerol in plastic mould of 12 mm depth. The permeability of the films, due to water and oxygen, was investigated at 27°C and 65% relative humidity while the mechanical properties were determined by nanoindentation technique. The average thickness of the dried nanocomposite films was found to be 17±0.13 μm. The performances of films for tomatoes packaging was evaluated in comparison with low density polyethylene (LDPE; 10 μm) at the temperature and period ranges of 10-27°C and 0-9 days, respectively. The quality and microbial attributes of the packaged tomatoes, including ascorbic acid, β-carotene and total coliform were analysed at an interval of 3 days. The results revealed that the water vapour permeability increased while the oxygen permeability decreased with the nanoparticles (P<0.05). The hardness, creep, elastic and plastic works, which determined the plasticity index of the film, decreased generally with the nanoparticles. The films containing 1 and 2% of the nanoparticles suppressed the growth of microorganisms and retained the quality of tomatoes than the LDPE at 27°C and day-9 of packaging (P<0.05). The results implied that the film could effectively be used for tomatoes packaging due to their lower oxygen permeability, hardness, elastic and plastic works.

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Author Biographies

Adeshina Fadeyibi, Department of Agricultural and Biological Engineering, Kwara State University, Malete

Department of Agricultural and Biological Engineering

Lecturer I

Zinash D. Osunde, Department of Agricultural and Bioresources Engineering, Federal University of Technology Minna

Department of Agricultural and Bioresources Engineering

Professor

Evans C. Egwim, Department of Biochemistry, Federal University of Technology Minna

Department of Biochemistry

Associate Professor

Peter A. Idah, Department of Agricultural and Bioresources Engineering, Federal University of Technology Minna

Department of Agricultural and Bioresources Engineering

Professor

Published
2017-05-29
Section
Original Articles
Keywords:
Nanocomposite, microbial load, packaging, shelf life, tomatoes, β-carotene.
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How to Cite
Fadeyibi, A., Osunde, Z. D., Egwim, E. C., & Idah, P. A. (2017). Performance evaluation of cassava starch-zinc nanocomposite film for tomatoes packaging. Journal of Agricultural Engineering, 48(3), 137-146. https://doi.org/10.4081/jae.2017.565