| Title | Locust bean milling-derived dust as a raw material for the development of biodegradable bioplastics with antioxidant activity |
|---|---|
| ID_Doc | 25415 |
| Authors | Lopes, J; Malheiro, C; Prodana, M; Loureiro, S; Ferreira, P; Coimbra, MA; Gonçalves, I |
| Title | Locust bean milling-derived dust as a raw material for the development of biodegradable bioplastics with antioxidant activity |
| Year | 2023 |
| Published | Journal Of The Science Of Food And Agriculture, 103, 3 |
| Abstract | BACKGROUND Non-value agrifood byproducts are rich in biomolecules such as proteins and polysaccharides, and possess film-forming ability, motivating their use in the development of biodegradable plastics. This work studied the feasibility of using locust bean milling-derived dust (LBMD) as a source of biomolecules suitable for developing biodegradable plastics. RESULTS LBMD is composed of 56% protein, 28% carbohydrate, 10% moisture, 6% lipid, and 2% ash. In addition, phenolic compounds are also present. The carbohydrates are mainly composed by (1 -> 4)-mannose, (1 -> 4,6)-mannose, and t-galactose glycosidic linkages. Depending on the LBMD concentration used, when employed in casting biodegradable plastics, LBMD yields transparent yellowish bioplastics with 90% elongation at break and surface water contact angles ranging from 60 degrees to 90 degrees. Additionally, LBMD-based bioplastics display antioxidant activity, inhibiting cationic 2,2 '-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radicals up to 61% in just 24 h. LBMD-based bioplastics are disintegrated when incubated on the soil surface for 34 weeks, perhaps acting as a soil nutrient. CONCLUSION LBMD represents a potential source of biomolecules for producing transparent, flexible, water tolerant, antioxidant, and biodegradable bioplastics, opening up opportunities to implement a novel circular strategy to valorize this locust bean industry byproduct. (c) 2022 Society of Chemical Industry. |
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