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Effect of Clove Essential Oil on the Properties and Structure of Zein Edible Films

ZHANG Huiyun, GUO Xinyu, WU Jingjuan   

  1. College of Food & Bioengineering, Henan University of Science and Technology, Luoyang 471023, China
  • Online:2016-06-25 Published:2016-06-29

Abstract:

The aim of this work was to study the effects of incorporating clove essential oil (CEO) on the physical,
mechanical, barrier properties and microstructure of zein films. The incorporation of CEO in the range of 0.5%–2.0% (V/V)
increased the thickness, elongation at break, opacity and water vapor permeability of zein edible films in a concentrationdependent
fashion. The addition of CEO at a level between 0.5% and 1.0% (V/V) significantly increased the tensile strength
value (P < 0.05). The incorporation of CEO improved mechanical properties and increased light-barrier property and
moisture permeability. The structure of the films was characterized via Fourier transform infrared spectroscopy (FTIR) and
scanning electron microscopy (SEM). The results showed that the addition of CEO did not modify the chemical structure of
films significantly. But the surface morphology of composite films was rough and uneven with more micropores.

Key words: zein, clove essential oil, physical characteristics, mechanical properties, microstructure

CLC Number: