Developments of biodegradable polymer based on polylactic acid (PLA) with natural color extracts for packaging film applications

This research was interested in the use of natural colorants to replace hazardous synthetic pigments plastic polymer industry. The colors were selected from local plants indigenous southeast Asia, which Hibiscus sabdariffa roselle calyx (RS) and Caesapinia sappan Linn heartwood (SP). Natural colorant extracts used as additives poly(lactic acid ) (PLA). These manufactured using a twin screws extruder blow film obtain biodegradable thin films for packaging materials. Biodegradable characterized by color index, light barrier properties, water vapor transmission (WVTR), morphology, mechanical chemical properties. results showed high compatibility between PLA confirmed via SEM morphology. Moreover, have associated with added RS SP extracts, pink tone yellow-orange film. Films incorporated also possessed improved reduced 98.66% 78.00% UV-A region 99.33% 90.00% visible region. Water rate decreased incorporation 4.02 g⋅m-2*day 2.98 at 7 days 1.66 1.59 14 days. containing had higher tensile strength modulus than pure films. properties improvement confirm that these are suitable producing