NATURE
·
2026
·
IF 56.1
Gao Ruiliang,Zhang Liwei,Lewis Richard J.,Wang Hao,Pan Zhiyan,Zhang Yage,Yu Zekai,Liu Zhiqiang,Guo Xiaolin,Du Xiangbowen,Liu Wencong,Li Minghang,Liang Shipan,Lu Bing,Daigo Ichiro,Mao Shanjun,Hutchings Graham J.,Wang Yong
Plastic waste accumulation poses a global threat to both the environment and public health 1 , 2 , 3 . Although catalytic upcycling to value-added chemicals holds promise, its industrial adoption is hindered by additive-induced catalyst deactivation, feedstock heterogeneity, process inflexibility and limited economic viability 4 . Here we report a catalyst-free upcycling strategy that makes use of in situ generation of hydroxyl radicals at microdroplet interfaces 5 , 6 , 7 , 8 to enable oxidative cleavage of diverse waste plastics—from polyolefins to rubbers—into carboxylic acids under mild conditions. By eliminating catalyst-dependent pathways, this approach circumvents key challenges of catalyst design and poisoning, while substantially lowering technical barriers and costs 9 , 10 . Our method achieves complete conversion of polyethylene (PE) with selectivity to short-chain diacids approaching 69% under relatively mild conditions and demonstrated broad applicability to mixed commercial plastics, with scalability demonstrated up to the 300-g scale. Radical intermediate analysis reveals the crucial role of H 2 O in mediating a unique oxidative degradation mechanism: sequential hydroxyl radical addition to alkyl radicals, distinct from classical liquid-phase aerobic oxidation of alkane 11 . This interfacial radical-mediated strategy enables sustainable polymer upcycling with minimal infrastructure. More broadly, this work provides a scalable blueprint for the first, to our knowledge, industrial implementation of microdroplet chemistry, with transformative implications for oxidation processes in organic acid synthesis and beyond.
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DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Shuangping Xu,Wenqiang Ma,Hailiang Zhou,Yushu Zhang,Hongge Jia,Jingyu Xu,Pengfei Jiang,Xintian Wang,Wenwen Zhao
Hybrid membranes containing different loadings of butadiene-bridged polymethylsiloxane (BBPMS) in ethyl cellulose (EC) were prepared by an one-pot blending method from a non-isolated solution of polymethylhydrosiloxane (PMHS) reaction with butadiene, and a solution of EC in THF. The semi-crosslinked BBPMS and the BBPMS/EC hybrid membranes having good compatibility were characterized by Fourier transfer infrared (FTIR) and Scanning electron microscopy (SEM). The BBPMS/EC hybrid membranes exhibited good membrane forming ability, heat resistance and mechanical properties. It was worth mentioning that the BBPMS/EC blended membranes exhibit good selectivity for CO 2 /N 2 and O 2 /N 2 . Specifically, the blended membrane (BBPMS/EC-5:5) showed the highest ideal selectivities for CO 2 /N 2 and O 2 /N 2 were 25.5 (at a CO 2 permeability of 175 Barrer) and 4.85 (at a O 2 permeability of 33.2 Barrer), respectively. Compared to the pure EC membrane, the ideal CO 2 /N 4 selectivity and the ideal O 2 /N 2 selectivity of the blended membrane (BBPMS/EC-5:5) were increased by 41.8% and 53.0%, respectively. The modification strategy using semi-crosslinked polysiloxanes to enhance gas transfer of EC is promising for fabrication of high performance CO 2 and O 2 separation membranes.
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Xiang Hu,Yanchen Huo,Xuyang Yan,Fei Wang,Li Pan,Xiaochao Shi
As Cp-derived ligands, substituted 4,5,6,7-tetrahydroindene (THI) ligands with tunable steric bulk have been synthesized, and their ligated half-sandwich rare-earth metal complexes were also sucessfully prepared and tested for styrene (co)polymerization. In conjunction with [Ph 3 C][B(C 6 F 5 ) 4 ], the THI-ligated scandium complexes exhibited high catalytic activity for highly syndiotactic polymerization of styrene (>99% rrrr ). THI 3Me -Sc /[Ph 3 C][B(C 6 F 5 ) 4 ] binary system also promoted the copolymerization of styrene and isoprene/butadiene by both the concurrent addition and sequentical addition of monomers, affording the copolymers with block microstructure as deterimined by NMR ( 1 H and 13 C) spectra. The huge difference in reactivity ratios betewen styrene and isoprene/butadiene ( r IP / r St = 31.1 and r BD / r St = 173.6) revealed in kinetics investigation further proved the predominantly block structure of resultant copolymers.
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Suting Xu,Yanchen Huo,Xiang Hu,Fei Wang,Li Pan,Xiaochao Shi
As indenyl-derivates, the tetrahydrofluorenyl ligands had an expanded “wingspan” with considerable steric hindrance. In this text, the rare-earth metal complexes bearing tetrahydrofluorenyl ligands have been synthesized and fully characterized by NMR (1H and 13C) and X-ray diffraction analyses. Upon the activation by [Ph3C][B(C6F5)4], all the scandium complexes exhibited excellent catalytic activity for highly syndioselective polymerization of styrene with a narrow molecular weight distribution (Mw/Mn < 2.0), suggesting the beneficial influence of tetrahydrofluorenyl ligands in stabilizing the single-site active species during the polymerization. Moreover, the scandium-based catalytic systems also promoted the 1,4-regular polymerization of butadiene and its copolymerization with styrene, affording diblock copolymers featuring a highly syndiotactic polystyrene block and a 1,4-specific PBD block. The kinetics investigation revealed the huge gap in TMS-Sc-catalyzed polymerization reactivity ratios (rBD/rSt > 300) between butadiene and styrene, and this further proved the block structure of styrene–butadiene copolymers. The morphology and mechanical property of the selected diblock copolymer were, respectively, investigated by atomic force microscopy and stress-strain experiments.
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DOI
PubMed
高影响因子
POLYMER
·
2025
·
IF 4.5
Bofan Shen,Jiang Liu,Fei Li,Wei Fan,Chunfu Sun,Zhenbiao Song,Ming Chen,Haotian Song,Xu He,Jian Kang,Qiang Fu,Ming Xiang,Shulai Lu
Interlayer bonding strength (IBS) is the decisive factor governing the performance of fused deposition modeling (FDM) parts. However, limited research has been conducted on regulating the material molecular structure within FDM processes to enhance IBS. In this study, different acrylonitrile butadiene styrene (ABS) specimens for FDM were fabricated by strategically modifying the molecular structure of ABS through emulsion grafting polymerization (to control grafted layer thickness) and seed amplification methodology (to achieve a bimodal particle size distribution). The grafted layer thickness of ABS polybutadiene (PB) phase particles, the compatibility between the two phases, the IBS, and the resulting properties of the FDM parts were investigated. The results demonstrate that increasing the grafted layer thickness of the ABS PB phase particles enhances the compatibility between the phases and increases the fluidity of the ABS melt. Consequently, this improves both the diffusion ability and time for molecular chains during the FDM process, thereby further enhancing IBS. Regulating a bimodal distribution of PB phase particle size further increased ABS melt fluidity, leading to additional IBS improvement. The IBS was directly quantified by T-peel tests, revealing an 110.8 % increase from ABS-1 to ABS-3, with ABS-3 exhibiting a 32.2 % higher peel strength (3.12 N/mm) than a commercial ABS. Following IBS enhancement, the impact strength increased by 60.7 % at 25 °C and by 161.5 % at −30 °C, while the tensile strength increased by 55.6 %. The retention rate of low-temperature impact strength increased by 62.6 %. Furthermore, the dimensional stability of the FDM parts demonstrated significant improvement.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Na Feng,Xin Guo,Mengmeng Chen,Xushuai Chen,Chen Li,Luke Yan,Peng Yang,Jia Kong
The widespread use of liquid polymers leads to significant waste and environmental pollution due to their leakage into water, and their removal is challenging due to their high viscosity, low fluidity, and strong adhesion. In this study, we introduce a superpolymphobic amyloid-like protein (ALP) coating for the removal of liquid polymers from water. The composite ALP coating, composed of phase-transitioned lysozyme and oxidized cellulose nanocrystals, was applied to a stainless-steel mesh. This ALP-coated mesh demonstrated excellent underwater superpolymphobicity with a polymer contact angle of 167.7 ± 1.1° and a sliding angle of 1.3 ± 0.1°. The coated mesh effectively repelled various liquid polymers (such as polydimethylsiloxane, epoxy resins, and silicone oils), enabling efficient separation of polymer/water mixtures with a separation efficiency of 99.49 %. The coating exhibited remarkable mechanical and chemical stability, maintaining its performance after multiple cycles of use and stringent durability tests, including bending, sandpaper abrasion, ultrasonic treatment, tape peeling, flushing, and exposure to acidic or alkaline solutions. The ALP coating can be applied to commercially available pre-filters, resulting in the production of pure water free from polymer contaminants. Furthermore, the coating can be regenerated for infinite recycling by simply spraying it on. This approach demonstrates direct applicability for retrofitting existing water purification systems, exhibiting enhanced biocompatibility and superior mechanical stability while providing a simple, mild, and scalable strategy to address polymer contamination in aquatic ecosystems.
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高影响因子
危险品化学品经营许可证（带存储）