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Application of a Pickering Emulsion Stabilized by Zein and Cellulose Nanocrystalline Composite Particles to Preserve Kiwifruit

Summary

Researchers developed a new type of protective coating for kiwifruit that prevents fungal decay and extends shelf life. This coating is made from natural materials (corn protein and cellulose nanoparticles) combined with carvacrol, a natural antimicrobial compound. The coating is stable, effective, and safe for human consumption, offering a promising alternative to traditional chemical fungicides for preserving fresh fruits.

Background

Kiwifruit is susceptible to post-harvest decay caused by the fungus Botryosphaeria dothidea, resulting in significant quality loss and economic impact. Traditional fungicides have limitations due to hazards and instability. Pickering emulsions stabilized by solid particles offer promising alternatives for fruit preservation with improved stability and safety.

Objective

To develop a Pickering emulsion system using zein colloidal particles (ZCPs) and cellulose nanocrystals (CNCs) as composite stabilizers loaded with carvacrol (CAR) for kiwifruit preservation. The study aimed to characterize the emulsion’s properties and evaluate its effectiveness in controlling soft rot disease.

Results

The optimal CAR@ZCPE formulation (ZCP/CNC = 1:3) exhibited excellent stability across temperature, pH, and ionic strength variations. It demonstrated 63.60% inhibition of B. dothidea mycelial growth at 50 mg/L. In kiwifruit preservation experiments, CAR@ZCPE significantly reduced decay spot diameter and area compared to controls. Cell viability remained high (58.53-94.57%) with an apoptosis rate of only 2.10%.

Conclusion

CAR@ZCPE successfully provides a safe and effective strategy for kiwifruit preservation with excellent stability, significant antibacterial activity, and good biosafety. The ZCP-CNC composite particle-stabilized Pickering emulsion approach represents a novel and promising technology for post-harvest disease prevention in fruits.
  • Published in:Molecules,
  • Study Type:Experimental Research,
  • Source: PMID: 40942006, doi: 10.3390/molecules30173478
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