Biodegradable thermoplastic starch of peach palm (Bactris gasipaeskunth) fruit: Production and characterisation

Abstract

The objective of this study was to produce and characterise biodegradable thermoplastic starch (TPS) derived from the fruit of pejibaye palm (Bactris gasipaes Kunth) plasticised with glycerol and sorbitol. The plasticised starch yielded a strength (σ) of 1.3 ± 0.2 MPa, deformation (ε) of 9.4 ± 1.6%, and Young's modulus (E) of 191 ± 72.0 MPa. The thermal analysis showed a 61.14% mass loss over the temperature range 290-388°C and an endothermic peak at 130°C. X-ray diffractograms of the TPS revealed peaks corresponding to crystallites of type Vh at 19.4°and type V at 22.6°. Morphological studies, by scanning electron microscopy, showed the plasticised starch had a homogeneous surface, without phase separation and without cracks, with few granules not gelatinised. The analysis of its biodegradation by soil burial tests showed a total mass loss of 84.4 ± 4.4%, after 18 weeks. Biodegradable TPS was successfully obtained from the pejibaye palm fruit, presenting resistant to traction and to the thermal degradation.

Active antioxidant and aromatic films blended with persimmon (Diospyros kaki L.) and orange peel flour (Citrus sinensis) as sustainable packaging

“…Table 3 shows the results on the water barrier and mechanical properties. Similar values were found in the literature for other fruit‐based films 13,44–46 . Some studies have shown that the incorporation of fibers in biodegradable polymers improves TS values, 42,47 as observed for F2 formulation based on PP with the addition of OPF (source of pectin) without the presence of plasticizer (glycerol).…”

“…Similar values were found in the literature for other fruit-based films. 13,[44][45][46] Some studies have shown that the incorporation of fibers in biodegradable polymers improves TS values, 42,47 as observed for F2 formulation based on PP with the addition of OPF (source of pectin) without the presence of plasticizer (glycerol). Similar to the reported by Han and Song, 48 this formulation resulted in a more compact and cohesive matrix, observed by SEM images.…”

Filmes biodegradáveis e agentes de reforço vegetais: Um enfoque em estudos brasileiros sob a ótica da economia circular

“…Otoni et al (2018) investigaram a biodegradação aeróbia no solo de filmes de hidroxipropilmetilcelulose reforçados com celulose advinda de resíduos de processamento de cenoura, que apresentaram maior taxa de biodegradação (± 60 mL de CO2 acumulado) durante 75 dias de análise em comparação com filme controle (± 20 mL de CO2 acumulado). Neto et al (2018) desenvolveram um filme à base de amido termoplástico do fruto da pupunheira biodegradável, no qual observou-se, pelo método soil burial, elevada perda de massa total do filme (84,4%) ao longo de apenas 18 semanas. Bagde e Nadanathangam (2019) evidenciaram elevada taxa de biodegradação em 2 meses para todos os filmes ativos à base de amido de milho desenvolvidos, porém a adição de bacteriocinas e de nanocelulose cristalina nas formulações filmogênicas estiveram associadas, respectivamente, à redução (± 11,2%) e ao aumento (± 4,8%) da taxa de biodegradação quando comparado ao filme controle (somente amido).…”

Nutritional and Technological Properties of Albino Peach Palm (Bactris gasipaes) from the Amazon: Influence of Cooking and Drying

“…The flour and starch obtained from the pulp of peach palms (with or without peel) have been extensively studied for their nutritional, functional, and biotechnological properties. Reports have shown the biological potential of using these products to improve metabolic properties [16,17], to increase the bioaccessibility of carotenoids in foods [18,19], and to obtain a biodegradable film from starch [20].…”