Modified arabinoxylan-based films. Part B. Grafting of omega-3 fatty acids by oxygen plasma and electron beam irradiation.
Arabinoxylans (AXs) are byproducts of the cereal milling industry. To obtain high-value products, AXs have been used as a film-forming agent. Hence, AX-based films are poor water vapor barriers. The objectives of this study were to graft omega-3 (omega3) fatty acids onto AX polymeric chains by using two new technologies: cold plasma and electron beam (EB) irradiation. Results show that the surface hydrophobicity of the modified films is higher than that of a waxy coating or a low-density polyethylene (LDPE) film. In addition, FTIR spectroscopy analysis reveals vibration bands attributed to new chemical functions. Finally, a decrease in water vapor permeability (WVP) is obtained for the film treated with the alpha-linolenic acid-rich oil. This result could be explained by a better diffusion of this shorter polyunsaturated fatty acid into the AX network. Linseed oils provide better barrier properties and a higher surface hydrophobicity than oils extract from marine oils. Edible oils were chosen for edible application of these films to retard moisture transfers in stuffed biscuits.
ENSBANA-GPAB, Université de Bourgogne, 1 Esplanade Erasme, F-21000 Dijon, France.
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D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004583:Electrons; D015525:Fatty Acids, Omega-3 / Q000737:chemistry*; D018857:Food Packaging / Q000295:instrumentation; D010100:Oxygen / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014057:Tomography, X-Ray Computed; D014867:Water; D014990:Xylans / Q000737:chemistry*
D015525:Fatty Acids, Omega-3; D014990:Xylans; D014867:Water; C085118:arabinoxylan; D010100:Oxygen