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Structure and stability of edible oleogels prepared with different unsaturated oils and hydrocolloids
Author(s) -
Bascuas Santiago,
Hernando Isabel,
Moraga Gemma,
Quiles Amparo
Publication year - 2020
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/ijfs.14469
Subject(s) - sunflower oil , xanthan gum , food science , rheology , emulsion , materials science , olive oil , sunflower , homogeneous , chemistry , composite material , mathematics , organic chemistry , combinatorics
Summary Edible oleogels, with three oil types (olive, sunflower and flaxseed), hydroxypropylmethylcellulose (HPMC) and xanthan gum (XG), as structuring agents, were developed using the emulsion‐template approach, and subsequent drying of the emulsions using conventional or vacuum drying. Our results showed that for both drying methods, well‐structured oleogels were obtained using olive and sunflower oils for the preparation. These oleogels showed oil losses ˂10% after 35 days of storage. However, unstructured non‐homogeneous oleogels were obtained when using flaxseed oil and conventional drying, while it was not feasible to develop flaxseed oleogel with vacuum drying. Oleogels showed interesting rheological properties, including a high oleogel strength with an elastic modulus of the order 10 4 –10 5 Pa, weak dependence on frequency, and good thermostability. Moreover, high oxidative stability was obtained for olive oil oleogels, using both conventional and vacuum drying, and for sunflower oleogels using vacuum drying. Still, the initial oxidation rates of sunflower oleogels using conventional drying should be improved in future studies.