Renewable nanomaterials for barrier coatings on polyethylene packaging
Explore innovative barrier coatings using renewable nanomaterials like cellulose and lignin nanoparticles to enhance polyethylene packaging. Offering superior resistance to gas, liquids, and grease, these coatings hold promise for sustainable packaging solutions.
Overview
This innovative solution utilizes renewable nanomaterials to enhance the barrier properties of polyethylene (PE) packaging. By leveraging cellulose nanoparticles, colloidal lignin particles, and clay nanoparticles, this technology aims to significantly improve resistance against gas, liquids, and grease. The proposed coatings are not only environmentally friendly due to their renewable origins but also offer enhanced performance in terms of chemical permeation reduction. This makes them ideal for sustainable packaging applications.
Technical specifications
Key features:
- Nanomaterials: Utilizes cellulose nanofibrils, lignin particles, and clay particles for robust barrier properties.
- Coating Technologies: Compatible with blade, rod, curtain, and spray coating technologies.
- Adhesion Enhancement: Potential use of plasma treatment and hot-pressing to improve adhesion and performance.
- Versatile Solvent Use: Primarily water-based, but adaptable to other solvents while maintaining material performance.
Testing Procedures:
- Mechanical testing: Tensile, tear, burst strength under various conditions.
- Barrier testing: Assesses resistance to gas, liquids, and specific chemicals.
- Thermal properties evaluation.
- Microscopy for layer uniformity.
Technology readiness level
Currently at TRL 3, this technology is in the experimental proof of concept stage. Ongoing developments include formulating repeatable and uniform coatings and conducting comprehensive testing to confirm mechanical and barrier properties. Future steps involve refining coating techniques and exploring additional adhesion methods to enhance performance.
About North Carolina State University
North Carolina State University is a large, comprehensive public land‑grant research university in Raleigh. Its on‑campus research and technology park co‑locates corporate R&D groups, government partners, and faculty labs, enabling shared facilities, prototyping, and agile contracting. Located in North Carolina’s Research Triangle, partners tap a dense regional ecosystem while engaging through a statewide extension network and a mature co‑op program that deliver field deployment and workforce pipelines. Multiple pilot and demonstration facilities support scale‑up and validation toward pre‑commercial readiness. Research is supported by competitive funding from major federal agencies, including NSF, USDA, DOE, and DOD, and a dedicated technology transfer office with clear IP pathways helps accelerate commercialization.
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