Physicochemical and emulsifying properties of orange fibers stabilized oil-in-water emulsions

Li Huang, Juer Liu, Min Addy, Bo Ding, Yanling Cheng, Peng Peng, Yunpu Wang, Yuhuan Liu, Paul Chen, Roger Ruan

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The present work aimed to evaluate the physical and techno-functional property and microstructure of freeze-dried orange pulp and peel powders modified by high-pressure homogenization (HPH) treatment, and their emulsifying properties of oil-in-water emulsions treated with HPH. For orange pulp and peel powders, HPH pre-treatment was found to significantly reduce bulk density and increase the water and oil holding capacity (P < 0.05) of orange pulp and peel powders, and the particles appeared to have flake-like shape. When orange-pulp and peel dispersions were subjected to HPH treatment, all samples showed significant decreases in particle size and increases in ζ-potential (P < 0.05), and could maintain higher stability with extended storage time. Furthermore, Confocal Laser Scanning Microscopy (CLSM) also revealed that emulsion destabilization occurred with increased storage time due to oil-droplet aggregation and coalescence. The results indicated that emulsion stability was improved by HPH treatments, probably due to a steric or electrostatic repulsion against flocculation or coalescence of oil droplets, and orange fibers, particularly orange pulp are suitable feedstock as natural emulsifiers.

Original languageEnglish (US)
Article number110054
JournalLWT
Volume133
DOIs
StatePublished - Nov 2020

Bibliographical note

Funding Information:
Financial support for this research was provided in part by the National Natural Science Foundation of China (Grant No. 31701674 ), the Natural Science Foundation of Shandong Province (Grant No. ZR2016CL04 ), and University of Minnesota Center for Biorefining .

Funding Information:
Financial support for this research was provided in part by the National Natural Science Foundation of China (Grant No. 31701674), the Natural Science Foundation of Shandong Province (Grant No. ZR2016CL04), and University of Minnesota Center for Biorefining.

Keywords

  • Citrus fibers
  • Emulsifying
  • Emulsion
  • High pressure homogenization
  • Orange

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