Optimized mechanical and impact performance of high strength tempo oxidized cellulose nanofibril (TOCNF)—epoxy laminates

In this work, TEMPO cellulose nanofibril (TOCNF) laminates were fabricated using a layup method. Two different TOCNF layers tested, neat and with polyvinyl alcohol (PVA) strengthening aid four epoxy formulations as interlayers for the laminates. Flexural testing showed correlation between presence of stronger (TOCNFs + PVA) in laminate higher flexural strength, bending modulus, work failure. Different modes fracture within occurred based on type. A stiffer generated reduced mechanical response substantial intralayer damage. On other hand, more ductile increased WOF laminates, inducing delamination at interface. The addition silane coupling agent (APTES) resulted compatibility TOCNFs epoxy, generating an ultimate tensile strength (UTS) decreased energy to rupture associated reduction crack digression mechanisms system. general, (TOCNF adhesion (APTES), increase 61%, modulus 80% same failure when compared original Finally, impact materials was performed first time literature, specific comparable those achieved by acrylic borosilicate glass, while maintaining or similar glass. Laminates good transparency low haziness.