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<p>The incorporation of yerba grounds as a filler in composite materials results in a decrease in tensile strength; however, the differences between 5% and 10% filler content are minimal, suggesting potential cost advantages associated with higher filler loading. The unexpected higher molar mass observed in the sample containing 10% filler, despite the overall reduction noted across all processed samples, suggests that increased filler content may be affecting the heat transfer within the material matrix. Degradation tests of the obtained materials reveal a clear impact of the filler presence on the matrix degradation rate. Despite higher mass loss and increased water absorption associated with the filler’s hydrophilic nature, the presence of yerba does not significantly alter the copolymer composition of the matrix during degradation. The detection of additional signals corresponding to oligomer end groups after the degradation suggests that all compositions undergo degradation, leading to the fragmentation of larger molecules into smaller oligomers. Overall, the presence of yerba grounds reduces degradation rates during composting, likely due to its antimicrobial properties.</p>

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Sustainable materials from biodegradable polymer composites incorporating discarded yerba mate

  • 期刊论文

  • 发表日期：

    2026年5月18日

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  • Marta Musioł,
  • Jakub Włodarczyk,
  • Silke Andrӓ-Żmuda,
  • Henryk Janeczek,
  • Marcin Libera,
  • Abhishek Thakur

摘要

The incorporation of yerba grounds as a filler in composite materials results in a decrease in tensile strength; however, the differences between 5% and 10% filler content are minimal, suggesting potential cost advantages associated with higher filler loading. The unexpected higher molar mass observed in the sample containing 10% filler, despite the overall reduction noted across all processed samples, suggests that increased filler content may be affecting the heat transfer within the material matrix. Degradation tests of the obtained materials reveal a clear impact of the filler presence on the matrix degradation rate. Despite higher mass loss and increased water absorption associated with the filler’s hydrophilic nature, the presence of yerba does not significantly alter the copolymer composition of the matrix during degradation. The detection of additional signals corresponding to oligomer end groups after the degradation suggests that all compositions undergo degradation, leading to the fragmentation of larger molecules into smaller oligomers. Overall, the presence of yerba grounds reduces degradation rates during composting, likely due to its antimicrobial properties.