Cleanly Removable and Degradable Bio‐Based Adhesive for Flexible Displays DOI Creative Commons
Young Joo Park,

Sumin Lim,

Min Sang Kwon

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 12, 2025

Abstract In advanced applications such as flexible displays, reusing components is essential for achieving sustainability. However, the removal of acrylic pressure‐sensitive adhesives (PSAs), which bond these components, remains a major challenge due to residue formation and non‐degradable C─C backbone. Here, development new PSA alternatives foldable displays reported by introducing ultraviolet (UV)‐triggered debondability, degradability through lipoic acid analogs, visible‐light‐curing process. PSAs composed 60 mol% ethyl ester (LpEt) 3 UV‐cross‐linkable benzophenone‐functionalized monomers exhibit viscoelastic properties comparable those conventional PSAs, while also enable clean from substrates after use. Following removal, efficiently degrade into small molecular units in presence green reductant or can be recovered under controlled conditions. This strategy offers promising pathway toward sustainable enables recycling valuable display modules simultaneously allows adhesive recovery, thus presents viable alternative adhesives.

Язык: Английский

Open-Air Chemical Recycling: Fully Oxygen-Tolerant ATRP Depolymerization DOI Creative Commons
Stella Afroditi Mountaki, Richard Whitfield, Evelina Liarou

и другие.

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(28), С. 18848 - 18854

Опубликована: Июль 3, 2024

While oxygen-tolerant strategies have been overwhelmingly developed for controlled radical polymerizations, the low concentrations typically required high monomer recovery render solution depolymerizations particularly challenging. Here, an open-air atom transfer polymerization (ATRP) depolymerization is presented, whereby a small amount of volatile cosolvent introduced as means to thoroughly remove oxygen. Ultrafast (i.e., 2 min) could efficiently proceed in open vessel, allowing very retrieval be achieved ∼91% efficiency), on par with that fully deoxygenated analogue. Oxygen probe studies combined detailed kinetics revealed importance low-boiling point removing oxygen prior reaction, thus facilitating effective depolymerization. The versatility methodology was demonstrated by performing reactions range different ligands and at polymer loadings (1 M repeat unit concentration) without significantly compromising yield. This approach provides oxygen-tolerant, facile, efficient route chemically recycle ATRP-synthesized polymers, enabling exciting new applications.

Язык: Английский

Процитировано

7
Selective Depolymerization for Sculpting Polymethacrylate Molecular Weight Distributions DOI

A. Tamura,

Kevin A. Stewart, James B. Young

и другие.

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Янв. 29, 2025

Chain-end reactivation of polymethacrylates generated by reversible-deactivation radical polymerization (RDRP) has emerged as a powerful tool for triggering depolymerization at significantly milder temperatures than those traditionally employed. In this study, we demonstrate how the facile poly(butyl methacrylate) (PBMA) can be leveraged to selectively skew molecular weight distribution (MWD) and predictably alter viscoelastic properties blended PBMA mixtures. By mixing polymers with thermally active chain ends different weights inactive ends, MWD blends skewed high or low selective depolymerization. This approach leads counterintuitive principle "destructive strengthening" material. Finally, demonstrate, proof concept, encryption information within polymer mixtures linking Morse code MWDs before after depolymerization, allowing encoding data synthetic macromolecules.

Язык: Английский

Процитировано

1
Photocatalytic Application of Polymers in Removing Pharmaceuticals from Water: A Comprehensive Review DOI Open Access
Sanja J. Armaković, Stevan Armaković, Maria M. Savanović

и другие.

Catalysts, Год журнала: 2024, Номер 14(7), С. 447 - 447

Опубликована: Июль 12, 2024

This comprehensive review covers recent advancements in utilizing various types of polymers and their modifications as photocatalysts for the removal pharmaceutical contaminants from water. It also considers that enhance photocatalytic properties other materials, highlighting dual role improving water purification efficiency. Over past decades, significant progress has been made understanding polymers, including organic, inorganic, composite efficacy degrading pharmaceuticals. Some most commonly used such polyaniline, poly(p-phenylene vinylene), polyethylene oxide, polypyrole, have reviewed detail. Physical modification techniques (mechanical blending extrusion processing) chemical (nanocomposite formation, plasma techniques, surface functionalization, cross-linking) discussed appropriate modifying order to increase activity. examines latest research findings, development novel polymer-based application compounds, well optimization strategies enhancing performance. Additionally, challenges future directions this field are guide further efforts.

Язык: Английский

Процитировано

5
Chemical Recycling of Step-Growth Polymers Guided by Le Chatelier’s Principle DOI Creative Commons
Zhiyong Liu, Youwei Ma

ACS Engineering Au, Год журнала: 2024, Номер 4(5), С. 432 - 449

Опубликована: Июль 15, 2024

Although step-growth polymers (SGPs) play a fundamental role in the plastics economy, contributing significantly to various facets of our daily life, their end-of-life management remains inadequately addressed. Chemical recycling SGP wastes, involving depolymerization followed by repolymerization, emerges as promising solution toward achieving circular economy. The SGPs is usually dynamic equilibrium with polymerization reactions, thus falling under system amenable Le Chatelier's principle. This perspective endeavors elucidate interplay between principle and chemical particular emphasis on guidance provided latter process. To this end, we have selected five conventional SGPs, namely, poly(ethylene terephthalate), polyamides, polycarbonates, polyurethanes, polyureas, representatives how alterations temperature, pressure, concentrations products or reactants, catalysts influence process SGPs. Additionally, proposes several potential strategies for applying

Язык: Английский

Процитировано

4
Oxygen‐Tolerant ATRP Depolymerization Enabled by an External Radical Source DOI Open Access
Stella Afroditi Mountaki, Richard Whitfield, Athina Anastasaki

и другие.

Macromolecular Rapid Communications, Год журнала: 2025, Номер unknown

Опубликована: Фев. 22, 2025

Abstract Although the chemical recycling of polymers synthesized by controlled radical polymerization enables recovery pristine monomer at low temperatures, it operates efficiently under strictly anaerobic conditions. Instead, oxygen‐tolerant depolymerizations are scarce, and either restricted to use a boiling co‐solvent or performed in closed vessels, often suffering from conversions. Here, an open‐vessel, depolymerization atom transfer (ATRP)‐synthesized is introduced, leading high percentages regeneration (>90% efficiency). Dissolved oxygen eliminated utilizing catalyst loadings, lower loadings combined with initiator. Notably, methodology compatible various solvents (i.e., anisole, 1,2,4‐trichlorobenzene (TCB), 1,2‐dichlorobenzene (DCB), etc.) range commercially available ligands including tris 2‐(dimethylamino)ethylamine (Me 6 TREN) tris(2‐pyridylmethyl)amine (TPMA), as well more inexpensive alternatives such tris(2‐aminoethyl)amine (TREN) N,N,N‘,N‘‘,N‘‘ ‐pentamethyldiethylenetriamine (PMDETA).

Язык: Английский

Процитировано

0
Electrochemical Commodity Polymer Up‐ and Re‐Cycling: Toward Sustainable and Circular Plastic Treatment DOI Creative Commons
Maxime Hourtoule, Sven Trienes, Lutz Ackermann

и другие.

Macromolecular Rapid Communications, Год журнала: 2025, Номер unknown

Опубликована: Апрель 18, 2025

Abstract The demand for commodity plastics reaches unprecedented dimensions. In contrast to the well‐developed plethora of methods polymer synthesis, sustainable strategies end‐of‐life management continue be scarce. While mechanical re‐cycling often results in downgraded materials, chemical or up‐cycling offers tremendous potential an efficient and green approach, thereby addressing precarious treatment post‐use within a circular carbon economy. Recently, electrochemistry surfaced as uniquely powerful tool via functionalization degradation obtaining either novel polymers with valorized properties high‐value recycled small molecules, respectively. discussing recent progress that domain, future perspectives electrochemical modifications until January 2025 are outlined herein.

Язык: Английский

Процитировано

0
Cleanly Removable and Degradable Bio‐Based Adhesive for Flexible Displays DOI Creative Commons
Young Joo Park,

Sumin Lim,

Min Sang Kwon

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 12, 2025

Abstract In advanced applications such as flexible displays, reusing components is essential for achieving sustainability. However, the removal of acrylic pressure‐sensitive adhesives (PSAs), which bond these components, remains a major challenge due to residue formation and non‐degradable C─C backbone. Here, development new PSA alternatives foldable displays reported by introducing ultraviolet (UV)‐triggered debondability, degradability through lipoic acid analogs, visible‐light‐curing process. PSAs composed 60 mol% ethyl ester (LpEt) 3 UV‐cross‐linkable benzophenone‐functionalized monomers exhibit viscoelastic properties comparable those conventional PSAs, while also enable clean from substrates after use. Following removal, efficiently degrade into small molecular units in presence green reductant or can be recovered under controlled conditions. This strategy offers promising pathway toward sustainable enables recycling valuable display modules simultaneously allows adhesive recovery, thus presents viable alternative adhesives.

Язык: Английский

Процитировано

0