engleski

Bioplastic based on thermoplastic potato starch citrate: Thermal properties

Packaging waste accounts for a significant portion of municipal solid waste generation, negatively impacting interconnected human-earth systems in a variety of ways and strongly influencing climate change. The dominance of the linear economy (take- use-dispose) is difficult to eliminate. The transition from the dominant linear economy to the circular economy ; “5R” (reuse-reduce-recycle- renew-remove) is extremely important, especially with regard to the use of packaging. [1-2] In this paper, potential packaging materials based on polylactic acid (PLA) and thermoplastic potato starch citrate (TPS) are investigated. Potato starch was plasticized with glycerol and citric acid and then compounded with PLA in a laboratory Brabender mixer. The thermal properties of the TPS/PLA bioplastic were characterized using differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and thermogravimetric analysis (TGA). According to the DSC results for TPS/PLA bioplastics, the changes in melting and crystallization temperature indicate that there is an interaction between TPS citrate and PLA. The TGA results show that TPS is more thermally stable with the addition of citric acid. The viscoelastic properties were improved by the addition of citric acid. The addition of citric acid has a dual function, primarily as a plasticizer and also as a compatibilizer, i.e., it is a good candidate that can expand the range of achievable properties of TPS/PLA bioplastics. References [1] Ellen MacArthur Foundation, 2016. Intelligent assets: unlocking the circular economy potential, https://ellenmacarthurfoundation.org/intelligent- assets-unlocking-the-circular-economy-potential [2] F. Casarejos, C.R. Bastos, C. Rufin, M.N. Frota, Journal of Cleaner Production 201 (2018) 1019-1028.

bioplastic ; 5R ; thermoplastic potato starch citrate ; thermal properties

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