Selected Properties of Bio-Based Layered Hybrid Composites with Biopolymer Blends for Structural Applications

Aneta Gumowska , Eduardo Robles (1) , Arsene Bikoro , Anita Wronka (2) , Grzegorz Kowaluk (2)

1 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux
2 SGGW - Warsaw University of Life Sciences

In this study, layered composites were produced with different biopolymer adhesive layers, including biopolymer polylactic acid (PLA), polycaprolactone (PCL), and biopolymer blends of PLA + polyhydroxybutyrate (PHB) (75:25 w/w ratio) with the addition of 25, 50% microcrystalline cellulose (MCC) and 3% triethyl Citrate (TEC) for these blends, which acted as binders and co-created the five layers in the elaborated composites. Modulus of rupture (MOR), modulus of elasticity (MOE), internal bonding strength (IB), density profile, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) analysis were obtained. The results showed that among the composites in which two pure biopolymers were used, PLA obtained the best results, while among the produced blends, PLA + PHB, PLA + PHB + 25MCC, and PLA + PHB + 25MCC + 3TEC performed best. The mechanical properties of the composites decreased with increases in the MCC content in blends. Therefore, adding 3% TEC improved the properties of composites made of PLA + PHB + MCC blends

Keywords: blends; polylactide; polycaprolactone; polyhydroxybutyrate; microcrystalline cellulose; triethyl citrate; mechanical properties

Domains: Chemical Sciences; Material chemistry; Chemical Sciences; Polymers; Chemical Sciences; Theoretical and/or physical chemistry; Chemical Sciences; Analytical chemistry

Aneta Gumowska, Eduardo Robles, Arsene Bikoro, Anita Wronka, Grzegorz Kowaluk. Selected Properties of Bio-Based Layered Hybrid Composites with Biopolymer Blends for Structural Applications. Polymers, 2022, 14, ⟨10.3390/polym14204393⟩. ⟨hal-03841281⟩