Textile waste in the context of the circular economy

Radev, Radoslav; Marinova, Velichka

doi:10.1051/e3sconf/202340208048

Cited by 2 publications

References 18 publications

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Epoxy resin composites reinforced with upcycled fabrics: Mechanical, thermal, and morphological analysis

Al Mahmud,

Chowdhury,

Rayhan

et al. 2024

SPE Polymers

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The mechanical, thermal, and morphological characteristics of epoxy resin composites reinforced using repurposed textiles are examined in this work. This study investigates reusing textile waste to produce composite materials using sustainable alternatives. This study shows how epoxy resin may be improved by mixing recycled materials with powdered coconut shells. 10% of the total weight, or the powdered coconut shell, was combined with fabric and epoxy resin in a 2:1 ratio with hardener. After the mixture was put into molds, it was given a 72‐h cure. Two samples were then ready to be tested for their mechanical, morphological, and thermal characteristics. Tensile, bending, impact, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) tests were used to evaluate performance. The force obtained in the tensile test was 1236.705 N, the bending test produced 86.76 N, and the impact test produced 3.33 J. The fabric and resin were found to have strong binding by SEM examination, and the TGA investigation indicated a notable heat absorption capability. The study offers insightful information on improving material performance through sustainable methods, which benefits the building, automobile, and aerospace sectors—industries where durability and environmental responsibility are critical.Highlights Used textiles enhance epoxy resin in composite materials. Tensile tests reveal structural integrity and longevity. Impact tests show resistance to dynamic loads. TGA and SEM analyses clarify thermal stability and bonding.

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Epoxy resin composites reinforced with upcycled fabrics: Mechanical, thermal, and morphological analysis

Al Mahmud,

Chowdhury,

Rayhan

et al. 2024

SPE Polymers

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Single Distal Mutation Enhances Activity of known PETases via Stabilisation of PET-binding

Fu,

Gracia I. Carmona,

Abrusan

et al. 2024

Preprint

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As a major source of plastic pollution, PET has attracted significant interest for biodegradation due to its potential in the circular economy. Finding effective enzymes still remains a challenge as screening methods are limited by either the low throughput or dependence on alternative non-PET substrates due to PET's insolubility. Here, we report a highly active, stable and robust enzyme, Fast_2.9, identified while directly screening for PET-degrading activity in mesophilic conditions using droplet-based encapsulation of PET nanoparticles with the throughput above 1 kHz. We identified a distal S269T mutation that improves activity in the majority of all known PETases with up to 400 times over wildtype, and more than twice of known engineered PETases, as tested on untreated post-consumer plastics. Microsecond time scale molecular dynamics analyses indicate that this distant mutation possibly influences residues near the substrate-binding cleft via a common mechanism across PETases. Compared to the state-of-the-art FastPETase and LCC_ICCG enzymes, the engineered Fast_2.9 enzyme requires up to 8 and 42 times lower enzyme concentrations to reach the same enzymatic activity, ultimately requiring significantly less enzyme. As such our engineered enzyme degrades multiple post-consumer PET substrates, including polyester textiles, within as least as just 2 days with up to nearly 100% terephthalic acid conversion using as little as 0.72 mgenzyme/gPET at 50 degrees C. Our study presents a universal methodology for direct screening of insoluble substrates at ultra-high-throughput and highlights the techno-economic potential of Fast_2.9 for PET depolymerisation.

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Textile waste in the context of the circular economy

Cited by 2 publications

References 18 publications

Epoxy resin composites reinforced with upcycled fabrics: Mechanical, thermal, and morphological analysis

Epoxy resin composites reinforced with upcycled fabrics: Mechanical, thermal, and morphological analysis

Single Distal Mutation Enhances Activity of known PETases via Stabilisation of PET-binding

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