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Emulsifying Properties of Polysaccharide Conjugates Prepared from Chin-Brick Tea.

Authors
  • Chen, Xiaoqiang1, 2
  • Zhang, Yuntian1
  • Han, Yu1
  • Li, Qian1
  • Wu, Li3
  • Zhang, Jia1
  • Zhong, Xiaoling1
  • Xie, Jianchun2
  • Shao, Shengrong1
  • Zhang, Yinjun4
  • Wu, Zhengqi1
  • 1 National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education) , Hubei University of Technology , Wuhan 430068 , China. , (China)
  • 2 Beijing Advanced Innovation Center for Food Nutrition and Human Health , Beijing Technology and Business University (BTBU) , Beijing 100048 , China. , (China)
  • 3 Department of Ophthalmology , Renmin Hospital of Wuhan University , Wuhan 430060 , China. , (China)
  • 4 College of Biotechnology and Bioengineering , Zhejiang University of Technology , Hangzhou 310014 , China. , (China)
Type
Published Article
Journal
Journal of Agricultural and Food Chemistry
Publisher
American Chemical Society
Publication Date
Sep 11, 2019
Volume
67
Issue
36
Pages
10165–10173
Identifiers
DOI: 10.1021/acs.jafc.9b03161
PMID: 31398024
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Chin-brick tea polysaccharide conjugates (TPC-C) were prepared to study their emulsion capabilities. Interfacial tension and the effects of some factors, such as storage time, metal ion concentrations (Na+, Ca2+), pH (2.0-8.0), and heat treatment (70-100 °C) on the emulsions stabilized by TPC-C were studied. The interfacial tension of TPC-C (10.88 mN/m) was lower than that of gum arabic (15.18 mN/m) at a concentration of 0.08%. As the TPC-C concentration increased from 0.1 to 3.0 wt %, the mean particle diameter (MPD) (d32) of emulsions stabilized by TPC-C decreased from 1.88 to 0.16 μm. Furthermore, at a concentration of 0.5 wt % or higher, the MPD (d32) of emulsions stabilized by TPC-C at 25 and 60 °C for 10 days was between 0.20 and 0.50 μm. In the tested pH conditions from 2.0 to 8.0, the MPD (d32) of emulsions stabilized by 2.0 wt % TPC-C was less than 0.20 μm. At Na+ concentration conditions between 0.10 and 0.50 mol/L, the MPD (d32) of emulsions was between 0.19 and 0.20 μm, and the zeta potential values varied from -34.10 to -32.60 mV. However, with an increasing Ca2+ concentration from 0.01 to 0.05 mol/L, the MPD (d32) of emulsions was between 0.20 and 21.65 μm, and the zeta potential raised sharply from -34.10 to -28.46 mV. The emulsions stabilized by TPC-C have a decent storage stability after a high-temperature heat treatment. Overall, tea polysaccharide conjugates strongly stabilized the emulsions, which support their new application as natural emulsifiers.

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