International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: unknown, P. 140529 - 140529
Published: Jan. 1, 2025
Language: Английский
Science, Journal Year: 2025, Volume and Issue: 387(6731), P. 297 - 303
Published: Jan. 16, 2025
Commercial adhesives are petroleum-based thermoset networks or nonbiodegradable thermoplastic hot melts, making them ideal targets for replacement by biodegradable alternatives. Poly(3-hydroxybutyrate) (P3HB) is a biorenewable and alternative to conventional plastics, but microbial P3HB, which has stereoperfect stereomicrostructure, exhibits no adhesion. In this study, elucidating the fundamental relationship between chemocatalytically engineered P3HB stereomicrostructures adhesion properties, we found that syndio-rich high strength outperforms common commercial adhesives, whereas syndiotactic, isotactic, iso-rich shows measurable The stereomicrostructure brings about desired thermomechanical viscoelastic properties of enable strong range substrates tested, including aluminum, steel, glass, wood, its performance insensitive molar mass reprocessing reuse.
Language: Английский
Citations
2
Chemical Communications, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
A novel terephthalate-based ionic liquid catalyst is promotes highly efficient neutral hydrolysis of PET without attendant inactivation or product contamination.
Language: Английский
Citations
2
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 27, 2025
While synthesizing circular polymers with telechelic polyolefin building blocks recently emerged as a promising strategy for addressing conventional polyethylenes' sustainability challenges, the lack of iPP (tPP) sufficient difunctional purity polycondensation has been limiting development polypropylenes iPP-like structures and properties. Here we described combined approach coordinative chain transfer polymerization transition-metal-catalyzed quenching reaction various acyl chlorides, affording tPPs high ratio (up to ∼99%) broad end functional group scope. The steric effect polymeryl-Zn species role Pd catalyst were revealed by DFT. This method also solved low challenge polyethylenes. Ester-linked iPPs structure thermomechanical properties PE/iPP multiblock copolymers synthesized resulting tPPs.
Language: Английский
Citations
2
Macromolecules, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 27, 2025
Language: Английский
Citations
2
Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(9), P. 2803 - 2841
Published: Aug. 12, 2024
Language: Английский
Citations
17
Langmuir, Journal Year: 2024, Volume and Issue: 40(35), P. 18512 - 18524
Published: Aug. 21, 2024
This study presents the synthesis and characterization of a novel phosphotungstic acid-functionalized hercynite@SiO
Language: Английский
Citations
14
Industrial Crops and Products, Journal Year: 2025, Volume and Issue: 226, P. 120638 - 120638
Published: Feb. 8, 2025
Language: Английский
Citations
1
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 13, 2025
Abstract With the increasing use of polylactic acid (PLA), more attention is turning to its post‐treatment. Current methods such as natural decomposition, composting, and incineration are limited by significant carbon dioxide emissions resource waste. Here, an efficient electrocatalytic conversion approach presented transform PLA waste into high‐value chemicals, particularly potassium acetate (AA‐K). By combining experimental theoretical calculation, a high‐performance catalyst Ni(Co)OOH developed, which exhibits current density 403 mA cm⁻ 2 at 1.40 V (vs RHE) with 96% Faraday efficiency for AA‐K in electrooxidation lactate (LA‐K, product degradation KOH). Through situ spectroscopy techniques functional theory calculations, structural regulation catalyst, reaction pathways elucidated. Further experiments demonstrate superior catalytic performance industrial‐scale tandem system. In h electrolysis, 320 g produces 232 L H₂, yielding 1200 97% purity after neutralization drying. The system demonstrates high (approaching 97%) diverse real forms, including powder, cups, fibers, cloth. This research provides scalable sustainable upcycling.
Language: Английский
Citations
1
Nature Sustainability, Journal Year: 2025, Volume and Issue: unknown
Published: March 11, 2025
Language: Английский
Citations
1
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: March 26, 2025
Polyesters, with potential for degradability and sustainability, are some of the most versatile polymer materials. However, limitation molecular weight (MW) presents a barrier to their applications. The synthesis polyesters high MW by ring-opening copolymerization (ROCOP) epoxides cyclic anhydrides is promising but rare challenging. Herein, we report series air-stable, hydrogen-bond-functionalized imidazole catalysts copolymerization. These can produce (4 examples) using cyclohexane oxide (CHO), propylene (PO), phenyl glycidyl ether (PGE), 4-vinyl-1-cyclohexene 1,2-epoxide (VCHO), phthalic anhydride (PA) record-high MW: Mn = 171.2 kDa poly(CHO-alt-PA), 518.5 poly(PO-alt-PA), 100.5 poly(PGE-alt-PA), 236.4 poly(VCHO-alt-PA). Furthermore, it achieve an unprecedented efficiency 15.6 kg polyester/g catalyst at molar ratio catalyst/PA/PO 1:40000:60000. achieved be attributed unique anionic-cationic coexisting ROCOP mechanism, which reduce transesterification, chain transfer, annulation side reactions. All showed excellent thermal stability, tensile strength, Young's modulus comparable commodity thermoplastics like polystyrene polylactic acid.
Language: Английский
Citations
1