Alginate-based emulsion template containing high oil loading stabilized by nonionic surfactants

Wan Ding Ong, Beng Ti Tey, Siew-Young Quek, Patrick Siah Ying Tang, Eng Seng Chan

    Research output: Contribution to journalArticleResearchpeer-review

    7 Citations (Scopus)

    Abstract

    Oil-in-water (O/W) emulsion-gel systems containing high oil payloads are of increasing interest for food applications because of the reduction in encapsulation cost, consumption frequency or volume of food products. This study shows a facile approach to prepare stable alginate-based O/W emulsions at high oil loading using a mixture of nonionic surfactants (Tween 80 and Span 20) as a template to form gelled-emulsions. The synergistic effects of alginate and surfactants on the O/W emulsion properties were evaluated in terms of oil droplet size and emulsion stability. At 2 (w/v) of alginate and 1 (w/v) of surfactants, the size distribution of oil droplets was narrow and monomodal, even at an oil loading of 70 (v/v). The emulsions formed were stable against phase separation. The oil droplet size could be further reduced to below 1 ?m using a high-shear homogenizer. The emulsions formed could be easily molded and gelled into solids of different shapes via ionic gelation. The findings of this study create possible avenues for applications in food industries. Practical Application: A facile method to prepare stable alginate-based oil-in-water gelled emulsions of high oil content using nonionic surfactants is reported. This emulsion gel template is useful in the development of encapsulated lipophilic products for the food industry.
    Original languageEnglish
    Pages (from-to)93 - 100
    Number of pages8
    JournalJournal of Food Science
    Volume80
    Issue number1
    DOIs
    Publication statusPublished - 2015

    Cite this