Starch and Hemicellulose as Barrier Materials in Food Packaging : - A study of the materials permeability and structure with polyvinyl alcohol as a reference

TL;DRAbstract

To prevent permeation through food packages, the packaging are often combined with barrier coatings. Many of these coatings are petroleum based and wished to be replaced with renewable materials. The aim with this study was to produce laboratory barrier films of starch, hemicellulose and polyvinyl alcohol (PVA) and to examine the structures of these films and investigate how these barriers are affected by plasticizer additions. In this thesis PVA was mostly used as a reference material. In this way more knowledge can be obtained how the structures of the barrier affect the barrier performance. Different amounts of plasticizer, sorbitol, was added to the polymer solutions, different temperatures was used to dry the barriers and the barriers was coated with different thickness. The structure of the barrier was examined by several different analyses; oscillatory tests, scanning electron microscope (SEM), differential scanning calorimetry (DSC), permeability with oxygen transmission rate (

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