Preparation and properties of cellulose nanofiber/Ti3C2Tx/Poly(lactic acid) composite film

Abstract

Polylactic acid (PLA), a new renewable and environmentally friendly polymer material, has gained signi cant attention in recent years. However, its application is limited by challenges such as poor thermal stability, brittleness and limited impact resistance. At present, PLA is predominantly modi ed through blending, lling and copolymerization methods. The above modi cation methods can effectively improve the properties of PLA to meet the needs of different applications. In this work, CNF/Ti 3 C 2 T x /PLA composites were prepared by impregnating cellulose nano bers (CNF) and the novel two-dimensional material Ti 3 C 2 T x into PLA. The effects of CNF and Ti 3 C 2 T x incorporation on the thermal, mechanical and electromagnetic shielding properties of PLA were investigated using various characterization techniques including FT-IR, XRD, DSC, TGA, tensile testing and electromagnetic test characterization. The results showed that CNF and Ti 3 C 2 T x can improve the crystallinity of PLA with a maximum crystallinity of 2.52%.Furthermore, these modi cations improved its thermal stability and increase the tensile strength by 177.2%. The addition of Ti 3 C 2 T x not only synergistically enhances the mechanical properties of PLA with CNF, but also imparts electromagnetic shielding performance to the polylactic acid composites. The fundings expand the application of PLA composites in the eld of electromagnetic shielding.