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Article Dans Une Revue Italian Journal of Food Science Année : 2011

Valorisation of industrial lignon as additive with antioxidiant properties in PLA

Résumé

Lignins are complex phenolic polymers. They are one of the main byproducts of mainly industries. The valorisation of lignin is therefore a key issue in the economic performance of these industries. One of the functional properties of lignin is an antioxidant action, the efficiency of which is closely linked to the lignin structure. Small phenolic compounds seem to play an important role in the antioxidant potential. In this work we studied the effect of the dispersion of an alkali lignin sample (Protobind 1000, Granit SA) in poly(lactic acid) on the properties of thermoformed films. The lignin was incorporated in the polymer with the help of a twin screw extruder and film samples were obtained by thermocompression. The effect of the fabrication process on lignin structure was investigated by size exclusion chromatography (SEC) and GC-MS. The barrier properties of the different samples were investigated through permeability measurements. The antiradical activity was assessed by DPPH radical scavenging tests. The analysis of lignin structure in the film samples showed that the process increase the proportion of small phenolic compounds, such as ferulic and rho-coumaric acids.

Domaines

Polymères
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Dates et versions

hal-01019108 , version 1 (07-07-2014)

Identifiants

  • HAL Id : hal-01019108 , version 1
  • PRODINRA : 215217
  • WOS : 000208717100036

Citer

Abderrahim Louaifi, Alain Guinault, Sandra Domenek, Violette Ducruet, Stéphanie Baumberger. Valorisation of industrial lignon as additive with antioxidiant properties in PLA. Italian Journal of Food Science, 2011, 23, pp.142-145. ⟨hal-01019108⟩
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