Microfibrillated Cellulose (MFC) Slot Die Coating Application: An Emerging Bio-Based Nanomaterial

Presented by Niloofar Moradian, Coating Tech Slot Dies

Microfibrillated cellulose (MFC) is an emerging bio-based nanomaterial with exceptional mechanical strength, high surface area, and tunable rheological properties, making it an attractive candidate for sustainable coatings in paper, packaging, and functional films. This study explores the application of MFC coatings using slot die technology, a precision fluid deposition method that enables uniform, pre-metered layer formation with controllable thickness and minimal material waste. Key parameters, including slurry concentration, viscosity, substrate speed, and slot die manifold design, were systematically evaluated to optimize coating uniformity, surface morphology, and mechanical performance. Results demonstrate that slot die coating of MFC produces highly uniform films with excellent adhesion, minimal defects, and enhanced barrier and mechanical properties compared to conventional coating methods. The findings highlight the potential of integrating MFC with slot die processing for scalable, high-performance, and environmentally friendly coatings, offering significant opportunities in sustainable materials development.