| 초록 |
Recently, considerable effort has been directed at developing replacements for synthetic plastics based on petroleum resources. Poly(lactic acid) (PLA), a linear aliphatic thermoplastic obtained from the ring-opening polymerization of lactide, is a popular bio-based polymer due to its attractive physical and mechanical properties. As a result, various research approaches for finding commercial applications have been developed such as biomedical, packaging and agricultural materials. However, the low melt strength of PLA results in a deterioration of the rheological properties, and limit its processability. In this study, we prepared PLA/cellulose nanofiber (CNF) nanocomposites and their foams by applying the pressure quenching of the supercritical CO2. The surface of the CNFs was modified to enhance the affinity between the two polymers. The effects of small amounts of CNFs on the thermal, rheological, and foaming behaviors of the PLA-based composites were investigated. |
