Lignin Nanoparticles as an Interfacial Modulator in Tough and Multi‐Resistant Cellulose–Polycaprolactone Nanocomposites Based on a Pickering Emulsions Strategy

Free-standing nanocellulosic films (nanopapers) emerge as attractive sustainable materials to replace traditional plastics. However, the moisture sensitivity of cellulose and its poor dispersion in hydrophobic polymers are challenges widespread application. Harnessing inherent properties cellulose, lignin, polycaprolactone, a Pickering emulsion approach is proposed produce multifunctional nanofibril (CNF) nanocomposite films. Aqueous CNF combined with polycaprolactone (PCL) using colloidal lignin nanoparticles (CLPs) stabilizer. CNF–PCL over 134% increase dry strength compared nanocomposites without CLPs fabricated. This interfacial engineering strategy results CNF-based wet up 87 MPa any chemical modification or crosslinking agents. The mechanism behind achieved excellent water resistance investigated it suggested that due amphiphilic able form non-covalent bonds both PCL, thus binding these together. Furthermore, films’ protection against UV oxidation significantly enhanced by increasing content. Our can be generically applied other polymer systems shows great potential pave way toward replacing fossil-based