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A Protocol for the Production of Gliadin-cyanoacrylate Nanoparticles for Hydrophilic Coating

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Bio-Based Dual-Layer UV-Cured Oil- and Water-Resistant Paper Coating for Food Packaging Applications.

Myungho Lee¹, Anuja P Rananavare¹, Youn Suk Lee¹

¹Department of Packaging and Logistics, Yonsei University, Wonju 26393, Republic of Korea.

International Journal of Molecular Sciences

|March 14, 2026

Summary

This study developed a dual-layer paper coating using chitosan and acrylated epoxidized soybean oil for sustainable food packaging. The fluorine-free coating provides excellent water and oil resistance, enhancing paper's barrier properties.

Keywords:

UV curing bio-based coatings chitosan dual layer food packaging application vegetable oil-based polymer water- and oil-resistant paper

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Area of Science:

Materials Science
Sustainable Chemistry
Food Packaging Technology

Background:

Growing demand for sustainable food packaging solutions.
Need for fluorine-free paper coatings with enhanced barrier properties.
Exploration of renewable resources for packaging materials.

Purpose of the Study:

To develop and evaluate a dual-layer, fluorine-free paper coating for improved water and oil resistance.
To utilize sustainable materials like chitosan and acrylated epoxidized soybean oil.
To assess the barrier, thermal, and mechanical properties of the coated paper.

Main Methods:

Application of a dual-layer coating (chitosan interlayer, UV-cured AESO top layer) onto kraft paper.
Evaluation of water repellency using Cobb test and oil resistance using kit rating.
Assessment of thermal stability via thermogravimetric analysis.
Measurement of mechanical properties including tensile and burst strength.

Main Results:

The Chi/AESO coated paper exhibited significantly enhanced water repellency (Cobb600 = 16 g m-2) and oil resistance (kit rating = 12).
Improved thermal stability and enhanced mechanical strength (tensile strength increased to 40 MPa, burst strength to 330 kPa).
Successful food contact tests confirmed effective barrier performance.

Conclusions:

The developed dual-layer chitosan/AESO coating offers a viable fluorine-free solution for sustainable paper-based food packaging.
The coating effectively imparts water and oil resistance, improved thermal stability, and enhanced mechanical properties.
This approach highlights the potential of renewable resources in creating high-performance, eco-friendly packaging materials.