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Physical Properties of Gelidium corneum Films Treated with Cinnamaldehyde - Research Note -

  • Ku, Kyoung-Ju (Department of Food Science & Technology, Chungnam National University) ;
  • Seo, Yung-Bum (Department of Forest Products, Chungnam National University) ;
  • Song, Kyung-Bin (Department of Food Science & Technology, Chungnam National University)
  • Published : 2007.06.30

Abstract

Gelidium corneum films were prepared using cinnamaldehyde as a cross-linking agent and their physical properties were determined. Tensile strength (TS) value of the film containing 0.01% cinnamaldehyde was higher than the control by 8.31 MPa. However, increasing cinnamaldehyde from 0.01% to 0.1% significantly decreased TS from 9.54 MPa to 0.03 MPa, and no film was formed at 1% cinnamaldehyde. On the contrary, when cinnamaldehyde content was increased from 0.01% to 0.1%, % elongation was increased from 1.44% to 2.75%. Water vapor permeability (WVP) of the film containing 0% and 0.01% cinnamaldehyde were 1.64 ng m/m$^2$sPa and 1.42 ng m/m$^2$sPa, respectively. There was no significant difference in Hunter values among treatments. Scanning electron microscopy results revealed that both cinnamaldehyde and control films had similar surfaces. These results suggest that 1.5% Gelidium corneum treated with 0.01% cinnamaldehyde should be the most suitable condition for film formation.

Keywords

Gelidium corneum;edible film;cross-linking agent;physical property

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