Materials circular economy最新文献

{"title":"Multi-lifecycle Assessment of Close-loop Recyclable Wind Turbine Blades.","authors":"Kyle Pender, Filippo Romoli, Jonathan Fuller","doi":"10.1007/s42824-025-00211-7","DOIUrl":"https://doi.org/10.1007/s42824-025-00211-7","url":null,"abstract":"<p><p>While over 80% of materials in modern wind power installations are recyclable, the sector continues to grapple with the absence of effective, scalable, and environmentally sustainable methods for managing end-of-life wind turbine blades. Addressing the environmental impact of these blades requires not only the integration of lower-impact materials into the manufacturing process but also the advancement of recycling technologies that enable the creation of high-quality secondary materials. Such initiatives are crucial for facilitating the wind energy sector's transition towards a circular economy. This study utilises lifecycle assessment to assess the environmental impact linked with the production of recycled glass fibre and recycled thermoplastic (polymethyl methacrylate, PMMA) products derived from composite wind blade waste. The assessment considers thermolysis recycling of thermoplastic-based blade waste, encompassing the subsequent refinement of recovered organics into usable secondary monomers. The process also involves the production of virgin-quality secondary glass fibre products, by cleaning and remelting of glass fibre recyclates. It was determined that recycled thermoplastic and glass fibre products can reduce most environmental impact indicators compared to virgin counterparts and are able to diminish material production global warming potential by up to 54% and 26% respectively. Consequently, wind blades manufactured using recycled thermoplastic and glass fibres are projected to have a 27% lower cradle-to-grave global warming potential compared to blades made with conventional epoxy resin and virgin glass fibre reinforcements. As such, both material and recycling solutions demonstrate the potential for decarbonising production and progressing toward a circular economy for wind blades.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s42824-025-00211-7.</p>","PeriodicalId":521054,"journal":{"name":"Materials circular economy","volume":"8 1","pages":"5"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12835088/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146095323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Olive Pomace as a Reinforcing Agent in PETG Filaments for 3D Printing in the Context of Circular Economy.","authors":"N Sánchez-Ávila, M Carmona-Cabello, M Cano-Galey, P E Romero, M P Dorado","doi":"10.1007/s42824-025-00186-5","DOIUrl":"10.1007/s42824-025-00186-5","url":null,"abstract":"<p><p>3D printing is increasingly present in many industrial applications, where petroleum-based polyethylene terephthalate glycol (PETG) is gaining importance. This is due to both its mechanical properties and ease of printing. In this context, with the aim of reducing the presence of plastics during the manufacturing process, the addition of olive pomace (OP) as an additive is proposed. OP is a residue from the olive oil industry that represents an environmental challenge, due to its high content of organic matter and phytotoxic compounds. To optimize the fabrication and further analysis of 3D printing filaments composed of a mixture of PETG and OP, a design of experiment (DoE) was used. To gain knowledge about the relationship between mechanical properties of different OP/PETG blends, OP particle size as filler, and extrusion number to produce the optimal filament, analysis of variance (ANOVA) besides response surface methodology (RSM) was applied. Additionally, thermogravimetric (TGA), differential scanning calorimetry (DSC), infrared (IR) spectroscopy analysis, and scanning electron microscope (SEM) of the new composite material blends were carried out. Subsequently, different OP/PETG filaments were produced via material extrusion additive manufacturing. This study revealed that the addition of 8% (v/v), < 100 µm OP particle size, fabricated using a double extrusion process, to PETG composites exhibited significantly enhanced mechanical properties. In particular, the incorporation of OP filler resulted in a remarkable increase in yield strength (35%), tensile strength (8.4%), and Young's modulus (27%). Furthermore, slight improvement in ductility, evidenced by an increase in elongation at yield (4.18%) and at break (5.16%), demonstrates the potential of OP as a valuable and sustainable reinforcement material for PETG composites. These findings pave the way for the development of high-performance environmentally friendly materials derived from residues, in the context of circular economies, for applications that require stiffer, stronger, and more tenacious material than straight PETG.</p>","PeriodicalId":521054,"journal":{"name":"Materials circular economy","volume":"7 1","pages":"36"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12442403/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145088891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}