The effect of xanthan, agar, gelatin, and pectin on the
stability,
physicochemical, and rheological properties of the Pickering emulsions
stabilized by canola protein microgel was studied in two ratios (1:1
and 2:1 as Pickering emulsion/hydrocolloids). Microscopic and FTIR
analyses were used to explore the structure and possible interactions.
Xanthan, gelatin, and agar increased G″ and G′ values. A controlled Pickering emulsion fabricated
without any hydrocolloids became unstable after one day, while no
phase separation was observed after adding xanthan, agar, and gelatin
over 40 days of storage. Microscopic and particle size analyses showed
that Pickering emulsions with xanthan had the smallest particle size.
Rheological measurements showed that xanthan, agar, and gelatin increased
the elasticity, solid-like, and viscose behavior of the emulsion.
Emulsions with agar represented the most elastic solid-like and viscose
character. It was concluded that such stable viscoelastic gel-like
systems could find potential applications as fat replacers in developing
novel healthy low-fat food products.