Alginate-oil sponges

A. Nussinovitch*, Z. Gershon

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Hydrocolloid sponges are dry gel products, the use of which can be economically feasible despite the high cost of the dehydration process. Sponges were produced by preparing cold set 1% alginategels including 0-40% oil within the gel before heat treatment and oil extraction. All gels were freeze-dried and kept over silica gel to avoid rehydration prior to testing and their mechanical properties were studied. The resultant cellular solids were compressed to 80% deformation between parallel lubricated plates and the stress-strain relationships were fitted to a compressibility model previously developed for the sigmoid stress-strain relationships of cellular solids: σ= C1ε/[(1 + C2ε) (C3 - ε)], where σ and ε are the stress and strain, respectively, and C1, C2 and C3 are constants. The sponges' inner structure was studied by scanning electron microscopy. Oil was found to change sponge structure and porosity. Oil-containing sponges can be used as carriers for oil-soluble ingredients, e.g. vitamins, colors and flavors.

Original languageEnglish
Pages (from-to)281-286
Number of pages6
JournalFood Hydrocolloids
Volume11
Issue number3
DOIs
StatePublished - Jul 1997

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