Polímeros
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Item Biodegradable hybrid PLA composites incorporating coffee husks and mineral fillers(Associação Brasileira de Polímeros, 2024-07-17) Silva, Riquelme Gomes da; Barboza, Laysa Silva; Silveira, Pedro Henrique Poubel Mendonça da; Conceição, Marceli do Nascimento da; Ribeiro, Roberto Carlos da Conceição; Bastos, Daniele CruzThis article details the development of hybrid composites with a PLA matrix filled with coffee husks, potassium feldspar, and Bahia Beige marble. Comprehensive analysis included FTIR, hardness, contact angle, density tests, SEM for microstructural insights, and XRF for optimizing raw material compositions. Also, variance analysis was applied in all results. The study revealed that these biodegradable composites hold promise for sustainable applications. Density variations were noted due to particle compaction, and hardness slightly decreased with coffee husks, attributed to uneven component distribution. Increased hydrophilicity was observed with filler addition. SEM confirmed strong interfacial adhesion, and color consistency was maintained. Notably, coffee husks significantly enhanced the degradation rate of PLA, achieving a 100% higher rate compared to pure PLA. The presence of calcium and potassium minerals offers additional benefits for soil health. The study suggests that thermoformed, multi-layered composite capsules can be fully biodegradable, promoting environmental sustainability in coffee capsule production.Item Disposable coffee capsules as a source of recycled polypropylene(Associação Brasileira de Polímeros, 2020) Domingues, Michel Lincoln Bueno; Bocca, Jean Rodrigo; Fávaro, Silvia Luciana; Radovanovic, EduardoIn this paper was investigated the chemical, physical, thermal, mechanical and morphological characteristics of the recyclable materials obtained of the NESCAFÉ DOLCE GUSTO branded beverage capsules, characterizing different resulting compositions. The characterization was made by following techniques: Fourier-transform infrared spectroscopy (FTIR), X-ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), Scanning Electron Microscopy (SEM), Water Absorption and techniques for the analysis of mechanical properties (tensile and impact test). The results showed that the body of the capsule and the inner flter, both made of polypropylene, are the most interesting materials to be reused, having good properties, while the materials resulting from the mixtures of all the constituents in the beverage capsules presented decreased mechanical properties.