The Current State-of-the-Art of the Processes Involved in the Chemical Recycling of Textile Waste

Molecules, Journal Year: 2025, Volume and Issue: 30(2), P. 299 - 299

Published: Jan. 13, 2025

The textile industry’s rapid growth and reliance on synthetic fibres have generated significant environmental pollution, highlighting the urgent need for sustainable waste management practices. Chemical recycling offers a promising pathway to reduce by converting used into valuable raw materials, yet technical challenges remain due complex compositions of waste, such as dyes, additives, blended fabrics.

Language: Английский

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Assessment of chemical risks and circular economy implications of recycled PET in food packaging with functional barriers

Resources Environment and Sustainability, Journal Year: 2024, Volume and Issue: 17, P. 100163 - 100163

Published: July 10, 2024

In response to regulatory demands for sustainable practices, there has been a significant increase in the use of recycled materials food packaging, particularly when incorporated behind functional barriers. This study, conducted as part "ABA Modeling" project, evaluates migration contaminants from non-decontaminated, polyethylene terephthalate (rPET) B-layer, which is sandwiched between two virgin A-layers three-layer trays. The study aims assess long-term implications safety within context European and French circular economy frameworks. Using modeling approach based on "worst-case" scenarios ten – similar methodologies employed decontaminated direct contact PET levels chemical residues are analyzed compared. Findings highlight impact co-extrusion process suitability rPET contact. Additionally, discusses risks challenges recycling sector, managing contamination during mechanical recycling. Recommendations provided improve industrial emphasizing importance ongoing monitoring ensure sustainability these practices.

Language: Английский

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Crystallization of Poly(ethylene terephthalate): A Review

Polymers, Journal Year: 2024, Volume and Issue: 16(14), P. 1975 - 1975

Published: July 10, 2024

Poly(ethylene terephthalate) (PET) is a thermoplastic polyester with excellent thermal and mechanical properties, widely used in variety of industrial fields. It semicrystalline polymer, most the success PET derives from its easily tunable crystallization kinetics, which allow users to produce polymer high crystal fraction for applications that demand thermomechanical resistance barrier or fully amorphous when transparency product needed. The main properties are presented discussed this contribution, together literature data on structure morphology PET. This followed by an in-depth analysis including both primary nucleation growth, as well secondary crystallization. effect molar mass, catalyst residues, chain composition, thermo-mechanical treatments structure, also reviewed contribution.

Language: Английский

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Poly(vinyl chloride) (PVC): an updated review of its properties, polymerization, modification, recycling, and applications

Journal of Materials Science, Journal Year: 2024, Volume and Issue: 59(47), P. 21605 - 21648

Published: Nov. 27, 2024

Language: Английский

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Recent Advances in Polymer Recycling: A Review of Chemical and Biological Processes for Sustainable Solutions

Polymers, Journal Year: 2025, Volume and Issue: 17(5), P. 603 - 603

Published: Feb. 24, 2025

Plastics, particularly synthetic organic polymers, have become indispensable in modern life, yet their large-scale production has led to significant environmental challenges due persistent waste. Traditional mechanical recycling methods proven insufficient addressing these issues. This review explores recent advancements polymer recycling, focusing on chemical and biological processes, such as pyrolysis, depolymerization, enzyme-based degradation, which offer more efficient sustainable alternatives. Within the framework of a circular economy, also examines strategies like closed-loop plastic economies. These developments represent critical steps toward creating practices. The final chapter includes Quarterly Report 2024 plastics, providing an up-to-date overview current state its trends.

Language: Английский

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Microplastic production, distribution, and removal from the environment: a review

Russian Chemical Reviews, Journal Year: 2025, Volume and Issue: 94(3), P. RCR5155 - RCR5155

Published: March 1, 2025

The presence of microplastics (MPs) in the environment is a highly relevant and aggravating environmental problem, which concern not only for specialists various fields but also everyone who cares about future Earth. ever-increasing production polymers expanding use plastic products enlarged MP concentrations Earth's ecosystem. need to control accumulation spread MPs caused by current crisis where no microplastic-free areas have remained on number studies dealing with existing potential threat living organisms from consumption increasing every year. aim this review systematize available information occurrence briefly describe main types polymer materials acting as sources mechanisms formation transport environment. hazardous behaviour analyzed considering their impact physiology aquatic soil organisms. Special emphasis demonstrating adverse effect emissions 3D printing materials. An overview methods capture given facilitate analysis development more reliable removal disposal. As result review, we assess long-term human health consequences exposure. Understanding formation, lifecycle environment, ways interaction will controlling design implementation effective techniques remediation prevent ecological consequences. <br>The bibliography includes 244 references.

Language: Английский

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Recycling of a Polymer Mixture Through Dissolution–Precipitation and Development of Machine Learning Models to Assess Polymer/Solvent Suitability

Journal of Polymer Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 21, 2025

ABSTRACT Different plastics require specific recycling methods, but mixing various types can complicate their together. In this study, an innovative method for mixed was developed, based on the principle of dissolution–precipitation, focusing a plastic mixture typically found in bins. Initially, different solvents were employed to dissolve polymers individually being dissolution extent determined. Using data, together with solubility parameters, including Hildebrand coefficients and others, both solvents, used as inputs develop machine learning (ML) models. These models aimed identify suitable properties dissolving polymers. The developed model achieved training accuracy 92.03% testing 84.62%. However, when examining other, often more meaningful metrics, Precision, Recall, F1‐Measure scores 42.31%, 50%, 45.83%, respectively, obtained. Despite these preliminary challenges, stage laid groundwork developing methodology capable isolating all present high selectivity (between 93.5% 108.7%). recovered exhibited identical chemical, thermal, mechanical original counterparts. Overall, work provides pathway toward sustainable circular approach managing waste.

Language: Английский

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Carbon Recycling of High Value Bioplastics: A Route to a Zero-Waste Future

Polymers, Journal Year: 2024, Volume and Issue: 16(12), P. 1621 - 1621

Published: June 7, 2024

Today, 98% of all plastics are fossil-based and non-biodegradable, globally, only 9% recycled. Microplastic nanoplastic pollution is just beginning to be understood. As the global demand for sustainable alternatives conventional continues rise, biobased biodegradable have emerged as a promising solution. This review article delves into pivotal concept carbon recycling pathway towards achieving zero-waste future through production utilization high-value bioplastics. The comprehensively explores current state bioplastics (biobased and/or materials), emphasizing importance carbon-neutral circular approaches in their lifecycle. chiefly used low-value applications, such packaging single-use items. sheds light on value-added like longer-lasting components products, demanding properties, which increasingly being deployed. Based waste hierarchy paradigm—reduce, reuse, recycle—different use cases end-of-life scenarios materials will described, including technological options recycling, from mechanical chemical methods. A special emphasis common bioplastics—TPS, PLA, PHAs—as well discussion composites, provided. While it acknowledged that (waste) crisis stems largely mismanagement, needs stated radical solution must come core material side, intrinsic properties polymers formulations. manner cascaded bioplastics, labeling, legislation, technologies, consumer awareness can contribute topics this article.

Language: Английский

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Advances in Chemical Recycling of Polyethylene Terephthalate (PET) via Hydrolysis: A Comprehensive Review

Polymer Degradation and Stability, Journal Year: 2025, Volume and Issue: unknown, P. 111246 - 111246

Published: Feb. 1, 2025

Language: Английский

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Production of Plastic-Derived Fuel by Cohydrocracking of Different Polyethylene Terephthalate (PET) with Vacuum Gas Oil (VGO)

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

To promote the chemical recycling of polyethylene terephthalate (PET), its valorization by hydrocracking was investigated. ease implementation at large-scale this route, PET coprocessed with vacuum gasoil (VGO), which is a benchmark feed industrial unit (10 and 90 wt %, respectively) hydrocracked using PtPd/HY catalyst. Furthermore, suitability PETs different natures origins to produce fuel-assimilable streams assessed. Specifically, one virgin, commercial, mechanically recycled were used, analyzing differences in conversion, yields product fractions (dry gas, liquefied petroleum gases, naphtha, light cycle oil), composition naphtha oil fractions, given their possible interest being used formulation automotive fuels. The reaction runs performed batch reactor under following conditions: 80 bar, 420 °C, 120 min, catalyst/feed mass ratio 10 gcatalyst gfeed–1. modified degraded plastics more easily converted into liquid hydrocarbons within LCO contents isoparaffins between 45 50 %. From products, pathways PET-derived molecules evaluated.

Language: Английский

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