Flexible cellulose nanopaper with high wet tensile strength, high toughness and tunable ultraviolet blocking ability fabricated from tobacco stalk via a sustainable method

摘要: Cellulose nanopaper (CNP) is of great interest to researchers mainly due its renewability, excellent mechanical properties and optical properties. However, CNP usually sensitive water, resulting in the loss strength durability. To overcome this issue, work, an efficient sustainable route, which involved ammonium sulfite cooking formic acid hydrolysis, was reported isolate lignin-containing cellulose nanofibrils (CNFs) from tobacco stalk. The resultant CNFs were directly used fabricate strong, flexible, water resistant without any complex chemical modification. residual lignin found act as a reinforcing agent between CNP. tensile toughness (255 MPa 19.7 MJ m−3) much higher compared with those one (179 MPa 12.8 m−3). water-resistance also improved extraordinarily, maximum wet reached up 83 highest value comparison Compared lignin-free CNP, showed better thermal stability UV-blocking present work designed new route prepare are potential candidates replace petroleum-based materials many advanced applications.