Lignin nanoparticle-based barrier coating for repulpable paper packaging
Introducing a PFAS-free, waterborne reactive coating utilizing nano-lignin and other eco-friendly materials to enhance the barrier properties of paper packaging while maintaining repulpability.
Overview
The lignin nanoparticle-based barrier coating offers a sustainable and effective solution for paper packaging, eliminating the need for PFAS while enhancing barrier properties. The innovative formulation combines nano-lignin, citric acid, glycerol, and epoxidized soybean oil to form a semi-dense network, significantly reducing water vapor transmission rates (WVTR) on kraft paper. This technology provides a potential breakthrough in creating eco-friendly packaging materials that are both effective and recyclable.
Technical specifications
Key features:
- PFAS-free: Utilizes environmentally friendly materials such as nano-lignin and epoxidized soybean oil.
- Barrier performance: Reduces WVTR from ~102 to ~48 g/m²·day, with potential for values as low as ~0.7 g/m²·day.
- Network formation: Controlled esterification and physical interactions confirmed by FTIR analysis.
- Hydrophobic enhancement: Epoxidized soybean oil contributes to hydrophobic properties.
- Repulpability: Ongoing optimization ensures high barrier performance without compromising recyclability.
Technology readiness level
Currently at TRL 3, this technology is in the experimental proof of concept stage. Future phases involve optimizing formulation parameters, balancing barrier properties with crosslink density, and validating performance through additional testing and recyclability assessments.
About Clemson University
Clemson University is a comprehensive public land‑grant research university in Upstate South Carolina with a main campus and statewide outreach. Industry engages through co‑located facilities: an automotive innovation campus in Greenville, an energy testing complex in Charleston, and a research and technology park near the main campus with labs and offices. A strong co‑op program and corporate engagement team connect companies with faculty expertise and student talent, while the Extension network supports field trials and regional pilots. Research is backed by competitive federal funding from agencies such as NSF, NIH, DOE, USDA, and DOD. A dedicated technology transfer office provides IP, licensing, and startup support with clear pathways for industry‑sponsored agreements.
delivered to your inbox.