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

Xiaoqiang Chen1,2, Yuntian Zhang1, Yu Han1

  • 1National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education) , Hubei University of Technology , Wuhan 430068 , China.

Journal of Agricultural and Food Chemistry
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Tea polysaccharide conjugates (TPC-C) show excellent emulsion capabilities, reducing interfacial tension and particle size effectively. These natural emulsifiers demonstrate good stability under various conditions, supporting their application in food and cosmetic industries.

Keywords:
chin-brick teaemulsifierstabilitytea polysaccharide conjugates

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Area of Science:

  • Food Science
  • Colloid and Surface Chemistry
  • Material Science

Background:

  • Emulsifiers are crucial in stabilizing oil-in-water mixtures.
  • Natural polysaccharides are increasingly explored as alternatives to synthetic emulsifiers.
  • Tea polysaccharide conjugates (TPC-C) offer potential as novel emulsifying agents.

Purpose of the Study:

  • To prepare tea polysaccharide conjugates (TPC-C).
  • To evaluate the emulsion capabilities of TPC-C.
  • To investigate the impact of storage time, metal ions, pH, and heat treatment on TPC-C stabilized emulsions.

Main Methods:

  • Preparation of TPC-C.
  • Measurement of interfacial tension.
  • Determination of mean particle diameter (MPD) and zeta potential of emulsions.
  • Assessment of emulsion stability under varying conditions (pH, metal ions, temperature, storage).

Main Results:

  • TPC-C exhibited lower interfacial tension (10.88 mN/m) compared to gum arabic (15.18 mN/m).
  • Increasing TPC-C concentration reduced MPD from 1.88 to 0.16 μm.
  • Emulsions showed good stability across a pH range of 2.0-8.0 and moderate heat treatment.
  • Ca2+ ions significantly impacted emulsion stability, increasing MPD at higher concentrations.

Conclusions:

  • TPC-C effectively stabilize emulsions, demonstrating superior performance to gum arabic in some aspects.
  • TPC-C show good storage and thermal stability, indicating their suitability as natural emulsifiers.
  • The findings support the potential application of TPC-C as a novel, natural emulsifier in various industries.