A state-of-the-art review of multilayer packaging recycling: Challenges, alternatives, and outlook

Journal of Cleaner Production, Journal Year: 2024, Volume and Issue: 447, P. 141403 - 141403

Published: Feb. 28, 2024

Language: Английский

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Towards green membranes: Repurposing waste polypropylene with a single plant-based solvent via tandem spin-casting and annealing

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 481, P. 148560 - 148560

Published: Jan. 4, 2024

A key aspect of advancing sustainable membrane technology is to source eco-friendly polymers, such as recycled plastic waste, use renewable plant-based solvents, and limit the number solvents used in dissolution-precipitation processes. In this study, we upcycle polypropylene PP waste into bi-layered microporous superhydrophobic membranes using a single solvent, Cymene, through tandem spin-casting annealing. The surface roughness hydrophobicity top layer enhance selectivity, while presence micropores ensures efficient liquid passage high permeability. bottom serves substrate for layer, providing structural support. Various annealing conditions were employed optimize hydrophobicity, roughness, porosity strength as-prepared membranes, yielding permeance outstanding separation efficiency. fabricated subjected oil–water emulsion separations, demonstrating contact angle exceeding 155° 123 nm, resulting an organic solvent flux 14,000 Lm-2h−1 with 96 % water rejection. Tensile strain found be 13–28 MPa 20–27 %, respectively. This research provided access environmentally friendly adding value potential benefits both polymer industries they transition towards circular economy.

Language: Английский

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Recycling of a post-industrial printed multilayer plastic film containing polyurethane inks by solvent-targeted recovery and precipitation

Resources Conservation and Recycling, Journal Year: 2023, Volume and Issue: 197, P. 107086 - 107086

Published: June 15, 2023

Language: Английский

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Transforming polypropylene waste into transparent anti-corrosion weather-resistant and anti-bacterial superhydrophobic films

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 466, P. 133597 - 133597

Published: Jan. 23, 2024

The global pollution crisis arising from the accumulation of plastic in landfills and environment necessitates addressing waste issues. Notably, polypropylene (PP) accounts for 20% total holds promise hydrophobic applications realm recycling. Herein, transparent non-transparent superhydrophobic films made PP are reported. A hierarchical structure with protrusions is induced through spin-casting thermally phase separation. had a water contact angle 159° could vary thickness, strength, roughness, hydrophobicity depending on end-user requirements. Bode plot indicated enhanced corrosion resistance films. Antibacterial trials Escherichia coli Staphylococcus aureus microbial solutions showed that film significantly lower rate colony-forming units compared to both surface control blank sample. Moreover, life cycle assessment revealed production resulted 62% embodied energy 34% carbon footprint virgin pellets sourced petroleum. These exhibit distinctiveness their dual functionality as coatings freestanding Unlike conventional require chemical application onto substrate, these can be mechanically applied using adhesive tapes variety surfaces. Overall, effective recycling into versatile not only reduces environmental impact but also paves way more sustainable eco-friendly future. One dealing reimagine it an abundant feedstock valuable products. This work attempts present how industry transform circular sector by providing alternate reusing waste, specifically repurposing multi-purpose Suitable applications, offer weather resistance, self-cleaning, anti-corrosion, antibacterial properties. study promotes greener future mitigating fostering environmentally friendly alternatives.

Language: Английский

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Valorization of mixed plastics waste for the synthesis of flexible superhydrophobic films

Advanced Composites and Hybrid Materials, Journal Year: 2024, Volume and Issue: 7(1)

Published: Jan. 9, 2024

Abstract Superhydrophobic surfaces are typically created by enhancing nanoscale roughness or incorporating anti-wetting additives like silanes, nanoparticles, fluorinated compounds. Limited the availability of nano-structured templates, simple fabrication, flexibility material, and cost-effectiveness, quest to synthesize superhydrophobic films remains challenging. Herein, we report valorizing mixed plastic waste for synthesis flexible via open-loop recycling. We focused on improving surface material using a series steps including selective dissolution, thermally induced phase separation, controlled spin-casting, annealing. synthesized two-layered film with high sufficient mechanical strength, making it suitable use as free-standing material. The contact sliding angles were found be 159° 4°, respectively, an RMS (root mean square) 228 nm. This approach is demonstrated mixtures high-density polyethylene (HDPE), low-density (LDPE), polypropylene (PP), which among most abundant components post-consumer waste. Life cycle assessments show that have lower carbon dioxide emissions embodied energy than virgin PE PP derived from petroleum. Our design strategy not only yields product but also provides alternative recycling bypassing cost-intensive sorting techniques. Graphical

Language: Английский

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Emerging green approaches for valorization of plastics with saturated carbon backbones

Trends in Chemistry, Journal Year: 2024, Volume and Issue: 6(3), P. 100 - 114

Published: Feb. 5, 2024

Plastics possess highly unsustainable linear life cycles that are environmentally damaging. With low recycling rates worldwide, plastics upcycling is emerging as a promising alternative by using these abundant waste products chemical feedstock for the production of materials and essential chemicals higher economic value. However, saturated C–C polymer backbones polymers constituting ~60% all plastic unreactive challenging to upcycle, often necessitating energy-intensive processes. This review examines state-of-the-art sustainable approaches employing Principles Green Chemistry functionalize or cleave backbones, including solvents, Earth-abundant metal catalysis, low-energy approaches, biocatalysis. Such strategies will enhance attractiveness practical feasibility achieve circular economy.

Language: Английский

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Polypropylene membranes prepared via non-solvent/thermally induced phase separation: Effect of non-solvent nature

Journal of Membrane Science, Journal Year: 2024, Volume and Issue: 703, P. 122839 - 122839

Published: May 3, 2024

Language: Английский

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A Review on the Application of Deep Eutectic Solvents in Polymer-Based Membrane Preparation for Environmental Separation Technologies

Polymers, Journal Year: 2024, Volume and Issue: 16(18), P. 2604 - 2604

Published: Sept. 14, 2024

The use of deep eutectic solvents (DESs) for the preparation polymer membranes environmental separation technologies is comprehensively reviewed. DESs have been divided into five categories based on hydrogen bond donor (HBD) and acceptor (HBA) that are involved in production DESs, a wide range DESs’ physicochemical characteristics, such as density, surface tension, viscosity, melting temperature, initially gathered. Furthermore, most popular techniques creating demonstrated discussed, with focus non-solvent induced phase (NIPS) method. Additionally, number studies reported which were employed pore formers, solvents, additives, or co-solvents, among other applications. addition to manufacturing process increased presence finger-like structures macrovoids cross-section and, numerous occasions, had substantial impact overall porosity size. Performance data also gathered made various technologies, ultrafiltration (UF) nanofiltration (NF). Lastly, provide options functionalization membranes, creation liquid membrane types, special supported (SLMs) decarbonization discussed terms permeability selectivity several gases, including CO2, N2, CH4.

Language: Английский

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Cast Film Production with Polyethylene Recycled from a Post-Industrial Printed Multilayer Film by Solvent-Targeted Recovery and Precipitation

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(9), P. 4042 - 4050

Published: Aug. 1, 2024

The solvent-targeted recovery and precipitation (STRAP) process separates recovers the constituent resins in multilayer plastic packaging films by selective polymer dissolution. In this work, three different experimental methods were considered to recover a polyethylene (PE) resin from printed film STRAP. consisted of (1) filter bag system, (2) Soxhlet extraction, (3) jacketed dissolution vessel. Cast produced with PE recovered each method analyzed for color, mechanical properties, number impurities. High-quality recycled cast can be increasing solvent ratio, including pore size 100 μm, optimizing temperature control This study demonstrates that STRAP polymers back into films, enabling potential circularity these materials.

Language: Английский

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MeSesamol, a bio-based and versatile polar aprotic solvent for organic synthesis and depolymerization

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 471, P. 144365 - 144365

Published: June 24, 2023

Applications of polar aprotic solvents are inevitable in the chemical industry, but few nonhazardous alternatives available. Herein, we propose methyl sesamol (MeSesamol) as a promising new bio-based alternative for and demonstrate its versatile applications. MeSesamol was derived from natural resources using environmentally friendly facile procedures, such methylation dimethyl carbonate. has distinctive smell demonstrates excellent properties green solvent candidate: high boiling open-cup flash points, immiscibility with water miscibility common organic solvents, stability resistance to several acids bases. an effective nine C–C coupling reactions, including Suzuki Sonogashira reactions asymmetric Michael addition. lies close dichloromethane (DCM) Hansen space achieves similar or higher yield enantiomeric excess (up 97% 99%, respectively) compared DCM. proved be recyclable depolymerizations bisphenol-A polycarbonate (BPA–PC) polyethylene terephthalate (PET). recycled five reaction cycles efficiency (92%–100%) outstanding cumulative monomer yields (92% BPA–PC 92% terephthalic acid PET). To properly compare depolymerization two metrics, namely, corrected energy-economy factor (εcorr) environmental energy impact (ξcorr).

Language: Английский

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