Cellulosic Engineering Plastic with High Shapeability, Recyclability, Lightweight and High‐Strength Properties

ABSTRACT Addressing the challenges posed by conventional petrochemical plastics, we developed a type of cellulosic engineering plastic (CEP) from renewable sources, achieving moldability, recyclability, and superior mechanical properties. By modulating the molecular conformation of cellulose with polyacrylamide, the CEP shows a low density of 0.73 g·cm − 3 , and a flexural strength and modulus of 106.6 MPa and 3.4 GPa, respectively. The glass transition temperature of CEP exceeding 154°C endows it with durability across temperature extremes from −25 to 100°C, surpassing several commercial plastics in performance. Life cycle assessment further reveals the CEP's reduced carbon footprint and resource depletion. The flexibility of CEP processing and recycling is also addressed, allowing it to be molded into various shapes and structures, supporting the transition toward a circular economy. Emphasizing its potential, this study posits the cellulosic plastic as a sustainable and efficient alternative, with broader implications for industries aiming at ecological responsibility.