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Researchers developed uniform lignin nanoparticles (LNPs) from castor seed coat lignin. These LNPs effectively stabilize Pickering emulsions for enhanced curcumin encapsulation and controlled release.

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Area of Science:

  • Biomaterials Science
  • Colloid and Surface Chemistry
  • Nanotechnology

Background:

  • Lignin structure influences lignin nanoparticle (LNP) self-assembly and properties.
  • Lignin nanoparticles (LNPs) are promising for various applications, including emulsion stabilization and drug delivery.

Purpose of the Study:

  • To investigate the self-assembly of distinct lignin oligomers into LNPs.
  • To utilize these LNPs for stabilizing Pickering emulsions.
  • To apply LNP-stabilized emulsions for curcumin encapsulation and controlled release.

Main Methods:

  • Extraction and fractionation of lignin oligomers from biomass.
  • Self-assembly of lignin oligomers into LNPs.
  • Characterization of LNP structure and properties.
  • Stabilization of Pickering emulsions using LNPs.
  • Encapsulation and release studies of curcumin.

Main Results:

  • Castor seed coat-derived lignin oligomers with catechyl units and phenolic hydroxyl groups efficiently self-assembled into uniform LNPs.
  • These LNPs exhibited high hydrophilicity and negative surface charge.
  • The uniform LNPs stabilized Pickering emulsions with small vacuoles, showing high stability for over 15 days.
  • LNP-stabilized emulsions enhanced curcumin storage and controlled its release.

Conclusions:

  • Lignin structure is crucial for LNP formation and function.
  • Uniform, functionalized LNPs can be derived from biomass.
  • LNP-stabilized Pickering emulsions offer a stable platform for drug delivery applications.
  • This approach enhances curcumin utilization efficiency and has potential economic and environmental benefits.