Plant-crafted starches for bioplastics production - Archive ouverte HAL
Article Dans Une Revue Carbohydrate Polymers Année : 2016

Plant-crafted starches for bioplastics production

Résumé

Transgenically-produced amylose-only (AO) starch was used to manufacture bioplastic prototypes. Extruded starch samples were tested for crystal residues, elasticity, glass transition temperature, mechanical properties, molecular mass and microstructure. The AO starch granule crystallinity was both of the Band Vh-type, while the isogenic control starch was mainly A-type. The first of three endothermic transitions was attributed to gelatinization at about 60 • C. The second and third peaks were identified as melting of the starch and amylose-lipid complexes, respectively. After extrusion, the AO samples displayed Vh-and B-type crystalline structures, the B-type polymorph being the dominant one. The AO prototypes demonstrated a 6-fold higher mechanical stress at break and 2.5-fold higher strain at break compared to control starch. Dynamic mechanical analysis showed a significant increase in the storage modulus (E) for AO samples compared to the control. The data support the use of pure starch-based bioplastics devoid of non-polysaccharide fillers.
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Dates et versions

hal-01528963 , version 1 (30-05-2017)

Identifiants

Citer

Domenico Sagnelli, Kim H Hebelstrup, Éric Leroy, Agnès Rolland-Sabaté, Sophie Guilois, et al.. Plant-crafted starches for bioplastics production. Carbohydrate Polymers, 2016, 152, pp.398 - 408. ⟨10.1016/j.carbpol.2016.07.039⟩. ⟨hal-01528963⟩

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