JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2012
·Vol. 50
·期 24
·4995-4999
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IF 3.919
Zhihai Hao,Hou Chen,Delong Liu,Lijun Fan
Sn(0)-mediated single electron transfer-living radical polymerization (SET-LRP) of acrylonitrile (AN) with carbon tetrachloride (CCl 4 ) as initiator and hexamethylenetetramine (HMTA) as ligand in N, N -dimethylformamide (DMF) was studied. The polymerization obeyed first order kinetic. The molecular weight of polyacrylonitrile (PAN) increased linearly with monomer conversion and PAN exhibited narrow molecular weight distributions. Increasing the content of Sn(0) resulted in an increase in the molecular weight and the molecular weight distribution. Effects of ligand and initiator were also investigated. The block copolymer PAN- b -polymethyl methacrylate with molecular weight at 126,130 and polydispersity at 1.36 was successfully obtained. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012
研究领域:
高分子化学
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聚合反应
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功能高分子
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材料化学
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有机合成
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Wenjun Cheng,Guoliang Cao,Wenping Huang,Mingyang Yang,Jianxiong Li,Tianchao Xu,Jiuming Guo,Ming Zhou
Treating bacteria-contaminated immiscible oily water remains challenging because oil/water separation and antibacterial activity are rarely integrated within one stable interface. Here, we report a polymerizable deep eutectic solvent (PDES)-derived coating that creates a charged ionic hydrated interface on stainless-steel mesh (PAA–ChClM). The PAA–ChClM is superhydrophilic/underwater superoleophobic, showing an underwater oil contact angle of 152° and ultralow oil adhesion. It enables gravity-driven separation of immiscible oil/water mixtures with a high flux of 7.6 × 10 4 L·m −2 ·h −1 and 99.95% separation efficiency, while maintaining performance under acidic, alkaline, saline, and long-term cycling conditions. More importantly, the interface is non-leaching and rapidly kills both Escherichia coli and Staphylococcus aureus within 5 s upon contact. The antibacterial activity originates from direct interaction between the charged ionic hydrated interface and the bacterial envelope, leading to membrane disruption, leakage, and collapse. Multilayer assembly further converts this contact-killing surface into a dynamic filtration platform, achieving near-complete disinfection in flow-through operation and effective treatment of natural lake water. This work establishes a PDES-derived ionic hydrated interface as a practical strategy for unifying anti-oil fouling, oil/water separation, and non-leaching antibacterial activity.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2026
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IF 19.9
Xin Wang,Xiaoming Chen,Baichuan Wang,Qingyuan He,Pengsong Sun,Kewei Su,Dongchen Zhao,Runlang Li,Chenghao Zhang,Feihu Shan,Jie Zhang,Jinyou Shao
Developing lightweight electromagnetic wave absorbers with broadband attenuation remains challenging due to the intrinsic conflict between impedance matching and attenuation capacity. Although multiscale architectures offer a theoretical pathway to resolve this dilemma, their realization is constrained by conventional aerogel processing, particularly by limited molding precision and the difficulty in forming complex curved structures. Here, we report a 3D printing-assisted double-sacrificial templating strategy for fabricating multiscale hierarchically architected graphene aerogels (HAGAs), enabling high-fidelity shaping of spatially intricate curved geometries at a feature resolution of approximately 150 µm. This approach integrates macroscopic gradient gyroid topologies with microscopic aligned cellular networks, thereby reconciling the impedance-attenuation trade-off. Specifically, the gradient topology optimizes impedance matching, whereas the aligned skeleton promotes multiple reflections and conductive dissipation. The optimized gradient HAGA achieves an ultra-broad effective absorption bandwidth of 9.25 GHz and a minimum reflection loss ( RL min ) of −62.42 dB at an ultra-low density of 13.82 mg cm −3 . Compared with its unstructured counterpart (5.41 GHz and −12.16 dB), this architecture delivers a 70.98% bandwidth expansion and a 50.26 dB lower RL min , alongside a 60% mass reduction. This work presents a scalable strategy for fabricating multiscale lightweight architectures with complex geometries, offering broad potential for stealth applications.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2026
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IF 8.8
Jingxue Wang,Dafan Chen,Wenjun Zhang,Shuang Geng,Zhining Wang,Mutai Bao,Yiming Li
Oily wastewater discharge poses significant challenges for ecological environments and public health. Conventional antifouling membranes primarily rely on passive size sieving and wettability regulation, while lacking the ability to actively modulate emulsion interfacial stability during filtration. In this work, by integrating nonsolvent induced phase separation (NIPS) with sequential electrostatic assembly, we developed a polyethyleneimine/poly (sodium 4-styrenesulfonate) (PEI/PSS)-modified MoS 2 /PVDF piezoelectric membrane (PPMP) that realizes pressure-triggered interfacial demulsification toward improved emulsion separation efficiency and dynamic antifouling ability. The incorporation of MoS 2 promotes the formation of the electroactive β-phase in PVDF and enhances the pressure-responsive electrical output, while the PEI/PSS coating improves membrane interfacial wettability. Under pulsed pressure filtration, the PPMP membrane generates continuous piezoelectric voltage outputs and exhibits excellent separation performance toward sodium dodecyl sulfate (SDS)-stabilized O/W emulsions and significantly improved antifouling performance. Mechanistic analysis reveals that the pressure-triggered piezoelectric field perturbs the surfactant-stabilized interfacial film, weakens emulsion stability, and promotes droplet polarization and coalescence. The resulting enlarged droplets are less likely to penetrate membrane pores and more readily detached from the membrane surface under the combined action of piezoelectric-field-induced interfacial effects and hydrodynamic forces. These coupled effects improve emulsion separation efficiency and mitigate membrane fouling. This work provides a promising strategy for designing stimuli-responsive piezoelectric membranes for efficient emulsion separation and antifouling performance in oily wastewater treatment.
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高影响因子
Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 5
·124157
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IF 7.5
Junyi Shi,Hongjuan Wang,Peng Liu,Dehai Yu,Dandan Ji
PLA-based composite aerogels with high oil selectivity, good reusability, and gravity-driven transport capability are promising materials for oily-water treatment and spill remediation. However, many high-performance oil/water separation aerogels still rely on non-degradable matrices or fluorinated surface modifiers. Herein, ZIF-71 nanoparticles were incorporated into a polylactic acid (PLA) aerogel to construct a hydrophobic capillary-gating network through solution blending, water-assisted thermally induced phase separation, liquid-nitrogen freezing, and freeze-drying. The chlorinated imidazolate framework contributed hydrophobic/oleophilic domains, polyhedral roughness, and textural porosity, while the PLA matrix provided a lightweight biodegradable skeleton. Compared with pristine PLA, the optimized PZ71–3 aerogel increased the water contact angle from 114° to 136°, tensile strength from 0.088 to 0.166 MPa, elongation at break from 10% to 25%, and total pore volume from 0.0066 to 0.0091 cm³ g⁻¹ , while showing a BJH average pore diameter of 10.8 nm. The aerogel resisted a water head of 14.5 cm, selectively captured both floating heptane and sinking CCl₄, achieved oil recovery efficiencies of 98.2–99.2% with gravity-driven oil fluxes of 5300–17,200 L m⁻² h⁻¹ , and retained stable oil sorption capacity and flux over 20 cycles. Comparative benchmarking shows that PZ71–3 offers a balanced performance profile among MOF/polymer and biodegradable-polymer aerogels. This work demonstrates ZIF-71-induced hydrophobic capillary gating as an effective fluorine-free strategy for recyclable PLA-based sorbents for oil/water separation.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2026
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IF 8.8
Yanqing Qu,Jiahao Li,Xiaoyu Du,Hongge Jia,Jingyu Xu
With the acceleration of industrialization, oily wastewater poses a serious threat to the ecological environment. Membrane separation technology has emerged as a research hotspot due to its advantages of high efficiency and energy savings; however, membrane fouling significantly restricts its long term stable operation. This study introduces a 3D COFs/MXene composite membrane with photocatalytic self–cleaning capability for highly efficient oil–water separation. A well dispersed 3D COFs colloidal dispersion was prepared via oil–oil–water three phase interfacial polymerization, effectively overcoming the dispersion challenges of COFs materials. Ti 3 C 2 T x MXene nanosheets were synthesized using the LiF/HCl etching method. Using intermolecular hydrogen bonding, the two components were ultrasonically assembled, and a COFs/MXene composite membrane was fabricated via vacuum assisted filtration. The membrane exhibits excellent hydrophilicity (water contact angle as low as 54.3°) and underwater oleophobicity (underwater oil contact angle up to 144.9°). Under visible light irradiation, the MXene component generates reactive oxygen species (·O 2 − and ·OH), enabling photocatalytic degradation of oil contaminants adsorbed on the membrane surface and thereby imparting self–cleaning functionality. Separation performance tests reveal that the composite membrane achieves efficient separation of various oil–in–water emulsions, with a maximum water flux of 1918.9 L m −2 h −1 bar −1 . The flux for n –hexane emulsion increased to 2.1 times that of pure MXene membrane, while maintaining a rejection rate above 98.8%. Moreover, the membrane demonstrates excellent cycling stability and photocatalytic antifouling performance. This research offers a novel strategy for developing self–cleaning separation membranes and holds promising potential for application in oily wastewater treatment.
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高影响因子
NATURE MATERIALS
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2026
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IF 38
Cao Qiannan,Yao Yingli,Zheng Wenming,Liu Hongqian,Jiang Mingxia,Xie Dayang,Zhang Siting,Su Pijun,Yuan Huilin,Chen Xiaoyuan,Fang Huapan,Tian Huayu
The clinical success of chimeric antigen receptor (CAR) T cell therapy requires scalable, non-invasive strategies for in vivo T cell engineering. Although mRNA delivery offers a promising alternative, lipid-nanoparticle-based carriers show limited efficiency for in vivo T cell transfection and typically require antibody conjugation. Here we report an inherent T cell-activating polymer–lipid nanoparticle that enables ligand-free, efficient mRNA transfection and activation of T cells in vivo. This mRNA delivery vehicle, composed of p -toluenesulfonyl arginine (RT)-modified oligoethylenimine-based lipid nanoparticles (ERTLNPs), preferentially mediated mRNA transfection in the spleen following systemic administration. Without exogenous stimulation, ERTLNPs intrinsically activated T cells, triggering robust mRNA expression and proliferation. Mechanistically, ERTLNPs engaged the PI3K/AKT/mTOR signalling axis to reprogram T cell metabolism, promoting expansion and restraining exhaustion. The systemic delivery of mRNA encoding fibroblast activation protein CAR via ERTLNPs contributed to the in situ generation of functional CAR T cells, which efficiently eliminated pathological fibroblasts in models of cancer and fibrosis, with minimal off-target effects. This ligand-free, metabolically reprogramming mRNA delivery system provides a clinically translatable approach for in vivo CAR T cell generation.
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高影响因子
Nature Communications
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2026
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IF 18.1
Ren Daheng,He Wenke,Ba Xuchen,Cen Yongxian,Yuan Shuaikang,Zuo Zhiqiang,Zhang Guijiao,Xu Jiamin,Zhang Na,Wang Aijie,Cheng Hao-Yi
Elemental sulfur recovery from sulfide-bearing wastewaters presents a promising strategy for achieving both a sustainable elemental sulfur supply and pollutant removal. However, existing methods face low efficiency or heavy chemical usage, limiting their practicality. Here, we report an iron-derived solid redox sulfur recovery system, capable of efficiently converting sulfides to elemental sulfur and separating elemental sulfur from the iron catalysts (ferrihydrite) via simple gravity-based methods. Using iron-derived solid redox system, we achieve a record sulfide removal rate of 102.9 ± 3.1 kg m −3 d −1 with an elemental sulfur selectivity of 93.5 ± 0.9%. The produced elemental sulfur is then efficiently separated from the solid mixture through a hydraulic sorting process, attaining 97.7 ± 0.2% purity. Mechanistic analysis identifies the iron and sulfur species governing the solid redox process and elucidates that the separation behavior of elemental sulfur is likely a result of surface-state-dependent elemental sulfur agglomeration and repulsion between elemental sulfur and iron flocs. Moreover, we verify the effectiveness of iron-derived solid redox system in recovering elemental sulfur from two real wastewaters and estimate the economic benefits of elemental sulfur recovery to exceed 180 United States dollars per ton. This work suggests a practical approach to enable sulfide-bearing wastewaters as a sustainable source for elemental sulfur supply efficiently and cost-effectively.
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高影响因子
RARE METALS
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2026
·Vol. 45
·期 8
·e70481
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IF 12.1
Long Jiang,Zhuang Wu,Qi Fan,Shengchao Wang,Wenjie Zhang,Lijing Yu,Dirong Gong,Yunlei Zhou,Kun Liang
en This link goes to a English section zh This link goes to a Chinese section Lithium–sulfur batteries have attracted extensive interest owing to their exceptionally high theoretical energy density and environmental benignity. However, their practical performance remains severely constrained by intrinsic challenges, including the polysulfide shuttle effect and large volume expansion during cycling, which markedly compromise energy efficiency and fall far short of the requirements for commercialization. To address these challenges, we modify a commercial separator (PP) with a dual-transition-metal Mo 2 Nb 2 C 3 MXene, whose surface terminations are precisely regulated via distinct etching strategies, thereby substantially enhancing the electrochemical performance of lithium–sulfur batteries. Compared with cells employing the pristine commercial separator, all PP@Mo 2 Nb 2 C 3 -based cells deliver superior rate performance at a high current density of 3C. Notably, the PP@Mo 2 Nb 2 C 3 -Cl cell retains a high discharge capacity of 589 mAh g −1 after 200 cycles, nearly doubling that of the cell with the commercial PP separator (307 mAh g −1 ). At all tested C-rates, the PP@Mo 2 Nb 2 C 3 -based cells delivered higher discharge capacities than those employing the commercial PP separator. Overall, modification of Celgard 2500 with the dual-transition-metal Mo 2 Nb 2 C 3 MXene effectively suppresses the polysulfide shuttle, enhances sulfur utilization, and substantially prolongs the cycle life of lithium–sulfur batteries. This work provides valuable insights into the rational design and application of MXenes as functional modifiers for advanced lithium–sulfur batteries. 摘要 en This link goes to a English section zh This link goes to a Chinese section 锂硫电池因其高理论能量密度和对环境友好受到广泛关注,但其在工作中产生多硫化物引起的穿梭效应、体积膨胀等问题严重影响电池的效率,远不足以达到商业化的要求。针对这些问题,本文研究了双过渡金属Mo 2 Nb 2 C 3 MXene对商用Celgard 2500进行改性,通过不同的刻蚀方法调控Mo 2 Nb 2 C 3 MXene端基,进而有效提升了锂硫电池的性能。与商用Celgard 2500隔膜相比,所有基于PP@Mo 2 Nb 2 C 3 的电池在3C倍率下均表现出更优异的倍率性能。值得注意的是,PP@Mo 2 Nb 2 C 3 -Cl电池在200次循环后仍保持589 mAh g −1 的高放电比容量,几乎是使用商用Celgard 2500隔膜电池(307 mAh g −1 )的两倍。在不同倍率下,PP@Mo 2 Nb 2 C 3 电池均表现出比使用商用Celgard 2500隔膜电池更高的放电比容量。总体而言,采用双过渡金属Mo 2 Nb 2 C 3 MXene对Celgard 2500隔膜进行改性,能够有效抑制多硫化物穿梭,提高硫利用率,并延长锂硫电池的循环寿命。这项工作为合理设计和应用MXene作为先进锂硫电池的功能改性材料提供了有价值的见解。
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Peixin Zhu,Yi Lu,Mengyao Xiao,Siyang Li,Chun He,Shuanghong Tian
Active MnO x location (inside MCM-41 pores vs. external surface) was precisely regulated. • Remarkable ozone oversolubility phenomenon within nanoconfined water was discovered. • Nanoconfinement effect triggered intrinsic inversion of reaction mechanism. • MnO x /C/MCM-41 nanoreactors perform excellently for complex wastewater treatment. Catalytic ozonation is promising for emerging contaminants (ECs) abatement but hindered by intrinsic bottlenecks: low O 3 solubility and catalytic efficiency. Herein, a series of xMn/C/M41 nanoreactors were fabricated via a two-step ligand-adsorption and metal-anchoring strategy. After pyrolysis, the optimized 3.3Mn/C/M41 nanoreactors confined ultra-small (~2 nm) mixed-valent MnO x nanoclusters and carbon within the mesopores of MCM-41, while s-3.3Mn/C/M41 (simultaneous ligand-metal complex adsorption) has 5–10 nm Mn 3 O 4 nanoparticles on the surface. 3.3Mn/C/M41 showed a 6.1 × 10 −2 min −1 sulfamethoxazole reaction rate (1.9 times that of s-3.3Mn/C/M41), > 93% removal of three other ECs, along with robust pH adaptability (3.5–10.5), matrix resistance and cycling stability. The excellent performance stems from the mesoporous confinement effects: 300-fold ozone oversolubility, rapid contaminant enrichment, and highly active MnO x nanoclusters with numerous undercoordinated Mn, oxygen vacancies, and Mn N motifs. Experimental and theoretical calculations demonstrate that the catalytic mechanism transforms from a hydroxyl radical (for s-3.3Mn/C/M41) to non-radical of electron transfer and 1 O 2 . This work provides a novel strategy to address the intrinsic bottlenecks of catalytic ozonation, and offers a promising platform for efficient remediation of emerging contaminants in complex aquatic environments. Download: Download high-res image (166KB) Download: Download full-size image
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高影响因子
Journal of Cell Communication and Signaling
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2026
·Vol. 20
·期 1
·e70067
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IF 4
Dandan Wang,Ning Li,Ranyan Gao,Jiaxin Wang,Lingyi Xu,Fengchun Li,Xinyu Geng,Ram Prasad Chaulagain,Babalola Deborah Oluwaseun,Xiaoyu Zhang,Shuang Jin,Shizhu Jin
Liver fibrosis is characterized by an abnormal buildup of extracellular matrix (ECM), which is primarily produced by hepatic stellate cells (HSCs). Laminin subunit gamma 2 (LAMC2) is an ECM protein whose functional role in hepatic fibrosis remains to be fully elucidated. Herein, we examine how LAMC2 contributes to liver fibrosis and explore the molecular mechanisms in both animal and cellular models. LAMC2 was knocked down in C57BL/6J mice with CCl4‐induced liver fibrosis. Rescue experiments were conducted in sh‐LAMC2‐treated and recilisib (PI3K/Akt agonist)‐treated mice. The transcription factors associated with LAMC2 in liver fibrosis were predicted and verified. Transforming growth factor (TGF)‐β1‐stimulated LX‐2 cells (HSC line) were infected with lentiviral vectors for in vitro assays. LAMC2, which was enriched in the PI3K/Akt pathway, was increased in the liver tissues of mice treated with CCl4, and recilisib reversed LAMC2 knockdown‐mediated alleviation of liver fibrosis in these mice. LAMC2 transcription in activated HSCs was caused by structural maintenance of chromosome protein 1A (SMC1A). The inhibitory effect of SMC1A knockdown on ECM accumulation and HSC activation was mitigated by LAMC2 overexpression. This study provides new insights and highlights the promising potential of the SMC1A/LAMC2/PI3K/Akt axis as a therapeutic target for liver fibrosis. Structural maintenance of chromosome protein 1A activates the PI3K/Akt signaling pathway by promoting laminin subunit gamma 2 transcription, which facilitates hepatic stellate cell activation and extracellular matrix deposition, leading to liver fibrosis progression.
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PubMed
高影响因子
ACS Applied Polymer Materials
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2026
·
IF 5.2
Wenjie Huang,Pengju Han,Qiaomei Zhang,Hangran Pei,Jingyu Ma,Chenxing Wang,Ningbo Zhao,Weili Shao,Jianxin He
Nanofiber membrane separation technology is crucial in the field of oily wastewater treatment. However, conventional separation membranes typically focus solely on oil–water separation or the removal of a single pollutant, making it difficult to achieve efficient oil–water separation while simultaneously and effectively removing coexisting heavy metal ions. This limitation constrains their application potential for purifying complex industrial wastewater. To address the key bottlenecks of conventional membranes, namely low flux and poor antifouling performance, this study proposes a PVDF@MOF-303/PVDF@ZIF-67 (PMPZ) Janus composite membrane with dual-functionality for switchable oil/water separation and heavy metal adsorption. The membrane is constructed by forming a lipophilic/hydrophobic nanofibrous base layer of ZIF-67-modified PVDF@ZIF-67 (PZ) via electrospinning and seed-assisted growth, and subsequently creating a fluffy, superhydrophilic/underwater superoleophobic layer of MOF-303-loaded PVDF@MOF-303 (PM) via air-spray spinning and an in situ growth technique. These two distinct layers are then integrated through ultrasonic bonding to form the final bilayer Janus structure. The resulting PMPZ Janus membrane achieves mode switching by flipping its orientation, enabling gravity-driven separation of various oil/water mixtures and emulsions with high flux (oil flux up to 9500 ± 200 L m–2 h–1 , water flux up to 7400 ± 300 L m–2 h–1) and excellent separation efficiency (>99.3 ± 0.1%). More importantly, the PM layer of the composite membrane exhibits outstanding heavy metal adsorption capacity (e.g., for Cu2+ and Ni2+), achieving an adsorption efficiency reached 82.7 ± 0.5% when removing heavy metal ions from simulated oily wastewater. This composite membrane, which integrates efficient separation, switchable operation, and synchronous heavy metal removal, provides a highly promising solution for treating oily wastewater with complex compositions.
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高影响因子
危险品化学品经营许可证（带存储）