Enzymatically modified quinoa starch-based Pickering emulsion: Effect of enzymolysis and emulsifying conditions
2022
Zhang, Liang | Chen, Dong-Ling | Wang, Xian-Fen | Qian, Jian Ya | He, Xu-Dong
Both the effects of enzymolysis condition on the microstructures and emulsifying property of enzymatic modified quinoa starch (EMQS) and the effects of emulsion formulation on the EMQS based emulsions were investigated. The emulsifying capacity (EC) and stability (ES) of EMQS were positive correlated with enzyme amount (0–2.4 % w/wₛₜₐᵣcₕ). The particle sizes of EMQS decreased and its hydrophobicity increased with increasing enzyme amount (0–2.4 % w/wₛₜₐᵣcₕ), which were the main reasons for the increasing emulsifying performance of EMQS. With the increasing starch concentration, the EC of the EMQS increased, the oil droplet size of the emulsion decreased. With the oil/water ratios ranging from 1:9 to 6:4, the emulsification index (EI) and oil droplet size of the emulsion increased. EMQS based emulsion had a relatively good stability in the pH range of 2–10. This study lays the foundation for the application of EMQS as a stable clean-label Pickering emulsifier.
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