Study on Packaging Properties of Biomass Materials Made by Bagasse Pith

摘要

The thermoplastic starch (TPS)-based biomass packaging materials with different amounts of bagasse pith (BP) (0, 5, 10, 15, 20 and 25% relative to oven dry starch) were prepared by melting blend methods, and the effects of BP contents on the packaging properties were investigated. Results of Fourier Transform Infrared (FTIR) illustrated that the intermolecular hydrogen bondings forms in BP and TPS. TPS could restrain starch retro gradation with increasing BP content. The tensile strength, flexural strength and flexural modulus increased with increasing BP content, while elastic modulus increased first and then decreased, and the maximum value was achieved by TPS/BP with 20 wt% BP content. The different effects on water absorption of TPS/BP were observed at 43 and 100% RH. The surface morphology of tensile fracture and flexural fracture analyzed by scanning electron microscopy (SEM) revealed strong facial interactions in BP and TPS with increasing BP content.