Edible composite films of wheat gluten and lipids: water vapour permeability and other physical properties

International Journal of Food Science and Technology - Tập 29 Số 1 - Trang 39-50 - 1994
Nathalie Gontard1,2,3, CHRISTOPHE DUCHEZ4, Jean-Louis Cuq4, Stéphane Guilbert1,5
1Lab. Génie Biologique et Sciences des aliments, Unité de nutrition- département agroressources et procédés biologiques (Place Eugène Bataillon Montpellier - France)
2UM - Université de Montpellier (163 rue Auguste Broussonnet - 34090 Montpellier - France)
3UMR IATE - Ingénierie des Agro-polymères et Technologies Émergentes (Campus de la Gaillarde 2, place Pierre Viala 34 060 Montpellier Cédex 02 - FRANCE - France)
4Laboratoire de Genie Biologique et Sciences des Aliments, Université de Montpellier II, Sciences et Techniques du Languedoc, 34095 Montpellier, France.
5Montpellier SupAgro - Institut national d’études supérieures agronomiques de Montpellier (2, place Viala 34060 Montpellier Cédex 2 - France)

Tóm tắt

Edible composite films comprised of wheat gluten as the structural matrix and various concentrations of different lipids as the moisture barrier component were tested for water vapour permeability, dispersion in water, opacity and mechanical properties. the effects of lipids on the functional properties of gluten‐based composite films depended on the lipid characteristics and on the interactions between the lipid and the protein structural matrix. Beeswax, a solid and highly hydrophobic lipid, was the most effective lipid for improving moisture barrier properties of films; but these films were opaque, weak and disintegrated easily in water. Combining wheat gluten proteins with a diacetyl tartaric ester of monoglycerides reduced water vapour permeability, increased strength and maintained transparency.

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