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Starch-based nanospheres (SNPs) effectively stabilize oil-water interfaces, showing increased interfacial activity with larger size and octenyl succinic anhydride (OSA) modification. These findings aid in selecting polysaccharide nanoparticles for Pickering stabilization applications.

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Area of Science:

  • Colloid and Surface Science
  • Materials Science
  • Food Science

Background:

  • Polysaccharide nanoparticles are crucial for Pickering stabilization of oil-water interfaces.
  • Understanding their interfacial activity is key for emulsion applications.

Purpose of the Study:

  • To investigate the interfacial properties of starch-based nanospheres (SNPs) at the n-hexane-water interface.
  • To evaluate the impact of particle size and octenyl succinic anhydride (OSA) modification on interfacial activity.

Main Methods:

  • Monitoring interfacial tension at varying bulk concentrations.
  • Characterizing three-phase contact angle (θ) and adsorption energy (ΔE).

Main Results:

  • Interfacial properties (θ, ΔE) improved with increased SNP size and OSA degree of substitution.
  • SNPs demonstrated superior interfacial tension reduction compared to OSA-modified starch (OSA-S) macromolecules.

Conclusions:

  • SNPs exhibit significant potential as Pickering stabilizers for oil-water emulsions.
  • Particle size and OSA modification are critical factors influencing SNP performance at interfaces.