Advanced Structures & Composites Center

Published: 2022

Publication Name: Research Square

Publication URL: https://assets.researchsquare.com/files/rs-1277635/v1/9508f716-1a69-415c-8d6f-5f17fb501a4b.pdf?c=1645564044

Abstract:

Recyclable cellulose nanobril (CNF) and lignin-containing cellulose nanobril (LCNF) coated wood our composites were fabricated using a vacuum-ltration process for food serving applications. The coated cellulose nanobril composites had excellent mechanical, and oil, and grease barrier properties compared to a commercial container. However, the composites with both LCNF and CNF coating layers had poor performance in wet conditions compared to the commercial container. The addition of 1 wt.% aluminum sulfate (alum) to the CNF and LCNF coating layer signicantly improved the water-resistance of the composites. CNF +1% alum coated composites had inferior water resistance and lower mechanical strength in wet conditions compared to the commercial container. However, the LCNF +1% alum coated composites had comparable water resistance and higher wet mechanical properties than the commercial container. The recyclability of the composites was assessed through the disintegration of the samples in water and subsequent reformation, and it was found that the composites were fully recyclable. The composites could fully retain their mechanical and excellent oil and grease barrier properties after each recycling level. These recyclable fully bio-based nanocomposites can be an eco-friendly alternative for currently used food container systems that use harmful chemicals.