TWB 06/15 Einfluss von Weichmachern auf Alginat-Filme

Wirkung von Glycerol und Sorbitol auf technofunktionelle Eigenschaften

Many applications of polysaccharide coatings are limited due to the low flexibility of such films. But there are possibilities to improve this behaviour, as shown in this approach with alginate cast films. The aim of this work was to investigate the influence of two different plasticisers (glycerol and sorbitol) on alginate films. Therefore, plasticised cast films were produced and analysed with regard to their functional properties. Both plasticisers had a positive effect on the mechanical properties. Water vapour and oxygen permeability were only slightly influenced by the addition of sorbitol, whereas the addition of glycerol increased the permeability of the films for both oxygen and water vapour.

Keywords: alginate films, plasticiser, barrier properties, mechanical properties, cast films

Schlagworte: Alginat-Filme, Weichmacher, Barriereeigenschaften, mechanische Eigenschaften, Beschichtungsmaterial

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