JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Qianqian Zhao,Haiqi Jia,Wenxiong Shi,Shaolu Li,Xiaohui Yi,Siqi Yin,Genghao Gong,Yunxia Hu
Aromatic polyamide (PA) reverse osmosis (RO) membrane has gained widespread usage in desalination and water production. Nevertheless, their surfaces are prone to fouling during practical applications stemming from their inherent physicochemical properties. Therefore, conducting research on enhancing the antifouling properties of PA membranes through surface modification is of significant importance. In this work, high-flux and superior antifouling RO membranes were fabricated via surface grafting and self-crossing of [3-(2-aminoethyl) aminopropyl] triethoxysilane (AEAPTES) on the pristine PA membrane surface. Benefiting from solvent activation by n-hexane/n-decane and the strong hydrophilicity of AEAPTES, the modified membranes showed a significant enhancement in water permeance by approximately 73 % (reaching up to 4.10 LMH/bar) compared to unmodified PA membrane, while maintaining NaCl rejection above 98.67 %. Additionally, the modified membrane exhibited outstanding stability. Dynamic fouling experiments with charged model foulants of varying molecular sizes, supported by molecular dynamics simulation analysis, demonstrated that the surface charge plays a crucial role in resisting small-molecule foulants, while hydrophilicity is more effective against macromolecule foulants. Although AEAPTES incorporation did not improve the antifouling performance to negatively charged sodium dodecyl sulfate (SDS), it significantly improved resistance to positively charged dodecyl trimethyl ammonium bromide (DTAB) and charged protein model foulants, including lysozyme (LYZ) and bovine serum albumin (BSA). These improvements are attributed to the creation of a thick hydration layer, as well as the electrostatic interactions and steric hindrance effects provided by the AEAPTES modified layer. This research offers new perspectives on the antifouling mechanisms of PA membranes modified by organoalkoxysilane molecules.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
ACS Applied Polymer Materials
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2024
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IF 4.4
Feng Gao,Ke Liu,Yongjun Wang,Junming Dai,Wenxing Chen,Wangyang Lu
Direct spinning of polyamide 6 (PA 6) fibers, traditionally impeded by the presence of approximately 10% residual monomer and oligomers in the polymerized form, has been made feasible through our innovative approach. Current extraction methods predominantly employ hot water to extract monomer and oligomers. However, this approach is characterized by time-consuming procedures, high energy consumption, and substantial water usage. Therefore, in this study, a straightforward falling-film devolatilization method is proposed to synchronize the liquid-phase viscosity enhancement and oligomer removal of PA 6. PA 6 industrial yarns were successfully produced using devolatilized PA 6 (D-PA 6) obtained by this method. The viscosities of D-PA 6 samples were increased from 2.5 and 2.8 to 2.8 and 3.4, their monomer contents were reduced to 0.26%, and their dimer and residual oligomer contents were reduced to 0.54 and 2.54%, respectively, with a lower removal of dimer and trimer. The process led to a wider molecular weight distribution, consistent with that typical of PA 6 spinning. The obtained PA 6 industrial yarn exhibited a high degree of crystallinity, and its orientation, thermal properties, and mechanical properties were comparable to those of conventional yarn. Although its dyeing ability was slightly compromised, this did not hinder the practical application of the PA 6 industrial yarn. The falling-film devolatilization process enables simultaneous viscosity enhancement and devolatilization without the need for hot-water extraction (24 h) and drying (24 h), drastically shortening the production time from more than 48 h to less than 10 h, thereby greatly reducing energy consumption and wastewater discharge. This study provides technical guidance for the sustainable industrial production of PA 6 industrial yarn by direct melt-spinning, which significantly reduces energy and environmental impacts while improving production efficiency.
研究领域:
材料科学
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纺织工程
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化工
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2018
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IF 4.439
Xue Tian,Shuang Wang,Jinsheng Li,Fengxiang Liu,Xu Wang,Hao Chen,Di Wang,Hongzhe Ni,Zhe Wang
Benzimidazole grafted polybenzimidazole cross-linked membranes (CPBIm-X) with outstanding phosphoric acid (PA) stability are successfully prepared. 2-chloromethyl benzimidazole (CMBelm) is grafted onto PBI mainchains and using 3-glycidoxypropyltrimethoxysilane (KH560) as a cross-linker. The benzimidazole sidechains can not only increase the basic sites but also allow the membrane to achieve higher phosphoric acid uptakes without sacrificing mechanical strength. Moreover, compared with the imidazole rings in the PBI backbone, the side chain with imidazole rings are flexible, which benefit the proton transportation and lower the activation energy. In addition, the mechanical strength of cross-linked membranes is excellent. For example, the tensile strength value of CPBIm-5 is 101.4 MPa, while that of the PBIm is 79.0 MPa. The proton conductivity is enhanced because the hydrolysis of KH560 resulting Si O Si networks structure, which can absorb more phosphoric acid. The Si O Si networks in the matrix can efficiently improve the stability of phosphoric acid (PA), the remaining weight of CPBIm-5 is 57% PA. Taking into account performance comprehensively, the weight of 5% KH560 is the optimum content. For example, the proton conductivity of CPBIm-5 is 0.092 S cm −1 at 180 °C. Compared to the pristine PBI, it is almost three-fold in proton conductivity.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2023
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IF 5.2
Xiaoxuan Guo,Fenglei Zhang,Yaseen Muhammad,Zhixiu Yang,Ruiping Wei,Lijing Gao,Guomin Xiao
The conversion of CO 2 into high value-added chemicals through efficient catalysis is an ideal strategy to reduce atmospheric CO 2 pollution and achieve carbon neutrality . Therefore, amino-functionalized organic polymer Cu@Co-PIL-N 4 loaded with highly dispersed CuI as a novel catalyst was developed. The functionalization of the surface and the high dispersion of the active phase integrate CO 2 capture and conversion into one catalytic system. The locally enriched CO 2 is converted to the easily activated carbon-oxygen negative ion by the action of primary or secondary amines. Thus, it is easier to achieve efficient preparation of α-alkylidene cyclic carbonates (STY = 20.8 h −1 ) by CO 2 carboxylative cyclization under mild conditions (25 °C, CO 2 pressure of 1 bar). The addition of a small amount of water to the cyclization system boosted domino reaction to convert the α-alkylidene cyclic carbonates to α-hydroxy ketones. The domino reaction also exhibited efficient catalytic activity and outstanding regioselectivity. In addition, the Cu@Co-PIL-N 4 catalyst exhibited excellent substrate expansion and cyclic regeneration for both reactions. This work promises great significance for further developing cost-effective and high-performance catalysts for the chemical conversion of CO 2 .
研究领域:
化学工程
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催化科学
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环境科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Zheng Zhang,Yang Wang,Ting Li,Junjie Wu,Jing Huang,Jie Jiang,Mingqing Chen,Weifu Dong
Sun protection has gradually become an indispensable living habit of human beings, and sunscreens are needed under various circumstances. Considering the disadvantages and abuse of traditional sunscreen additives which are proved to have some potential threats to human body and natural environment, it is an urgent need to develop new sunscreens with both safety and high efficiency for the evolution of the industry. Therefore, as a complement to the shortcomings, polydopamine (PDA) was hybridized with zinc oxide (ZnO) by a simple sol-gel method. The obtained novel sunscreen agent had high ultraviolet (UV) resistance efficiency, as the SPF (∼77.2) and PA (PA+++) value at only 10 wt% addition could meet the daily sunscreen requirements. Besides, the permeation of ZnO and Zn 2+ could be almost completely avoided through the epidermis layer of skin, due to the increase of mussel-inspired adhesive force. Furthermore, the free radical scavenging rate could reach 88.1% at low concentration, and it was proved to have no cytotoxicity. Overall, the ZnO-PDA has a good application prospect in high-efficiency and safe sunscreen, and it can be an impetus for the development of novel cosmetics.
研究领域:
材料科学
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化妆品科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
NANO
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2025
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IF 1.1
Ziling Zhuang,Shiqi Li,Chen Chen,Shengyong Mo,Fengwei Zhang,Yurong Cai
In view of the problem that epoxy resin cannot achieve effective flame retardancy, smoke and toxic gas suppression functions in fire, and poor interface compatibility with flame retardants, a coreshell structure with SiO 2 as the nucleus was designed, and a new multi-component flame retardant was prepared by introducing Ni and phytic acid using metalorganic frameworks (MOFs) as precursors. After mixing and curing with epoxy resin, the SiO 2 /CoNi-DH-PA/EP was obtained. With only 5% SiO 2 /CoNi-DH-PA added, the peak heat release, total smoke production, and total CO production of epoxy resin composites are reduced by 63.72%, 31.88%, and 63.74%, respectively, and the residue yield increased from 15.05% to 24.40%. It has been verified that SiO 2 , Co-Ni bimetallic ions and phytic acid have synergistic effects, which can induce and catalyze the formation of a complete and dense carbon layer. This significantly reduces the heat release, smoke, and toxic gas production, thereby reducing the fire hazard of epoxy resin. Additionally, the SiO 2 /CoNi-DH-PA/EP ensures good mechanical properties.
研究领域:
材料科学
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高分子化学
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消防安全工程
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纳米复合材料
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产品关联
DOI
高影响因子
Advanced Science
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2026
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IF 14.1
Anfeng Li,Fang Wang,Mou Jiang,Yu Li,Xin Zhou,Zhong-Xing Jiang
Tumor hypoxia limits the efficacy of photodynamic therapy (PDT), necessitating photosensitizers with hypoxia-adaptive therapy and imaging. Here, we present a fluorinated N -oxide aza-BODIPY ( OFBD ) nanoemulsion ( OFBD-NP ) for hypoxia-responsive, multimodal imaging-guided phototherapy. OFBD generates robust singlet oxygen under normoxia for PDT, but is reduced by CYP450 enzymes in hypoxic cells to photothermal-potent FBD , enabling switchable PDT/PTT. Co-assembly with fluorinated oil enhances oxygen delivery, boosts 19 F MRI sensitivity, and promotes J -aggregation, shifting fluorescence into the NIR-II window for deep-tissue imaging. The redox conversion also activates photoacoustic signals, enabling responsive tri-modal imaging (NIR-II FLI/ 19 F MRI/PAI). OFBD-NP shows potent cytotoxicity in vitro under both normoxic and hypoxic conditions via apoptosis. In vivo, it selectively accumulates in tumors, offers high-contrast imaging, and leads to complete tumor regression in subcutaneous A549 models after laser irradiation, without systemic toxicity. This work demonstrates a smart nanoplatform that integrates deep-tissue imaging and hypoxia-triggered therapeutic switching, addressing major limitations of conventional photosensitizers in cancer imaging and phototherapy.
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Yishu Cai,Zhou Shi,Haojie Zhang,Lin Deng
A hierarchical PEG-PA/Fe 3 O 4 @PNF composite membrane was fabricated for aged nanoplastics removal. • Synergistic surface sieving and depth adsorption achieve 99.89% removal of aged nanoplastics. • Fe 3 O 4 provides strong coordination sites for aged nanoplastics. Aged nanoplastics, characterized by their small size, abundant oxygen-containing functional groups, are high colloidal stability. These features make them difficult to remove by conventional membrane processes. Efficient removal usually requires membranes with very small pore sizes. This requirement causes a severe permeability and selectivity trade-off. Herein, a hierarchical PEG-PA/Fe 3 O 4 @PNF composite membrane was rationally engineered via electrospinning coupled with interfacial polymerization to achieve efficient removal of aged polystyrene nanoplastics (PSNPs). The membrane features a three-layer architecture consisting of a PEG-modified polyamide (PEG-PA) selective layer, a Fe 3 O 4 -loaded polyacrylonitrile nanofibrous (Fe 3 O 4 @PNF) adsorption layer, and a nonwoven support, enabling the integration of surface sieving and depth adsorption within a single membrane. PEG modification markedly improved surface hydrophilicity, reducing the water contact angle from 28.07° to 9.84%. As a result, water flux increased by 54.2% while simultaneously enhancing antifouling performance. Meanwhile, Fe 3 O 4 nanoparticles introduced abundant adsorption sites that effectively captured aged PSNPs through specific coordination interactions. Density functional theory (DFT) calculations further supported this proposed mechanism. Benefiting from the synergistic coupling of selective sieving and adsorption, the optimized membrane achieved an aged PSNP removal efficiency of 99.89% while maintaining a water flux of approximately 1142–1059 L m −2 h −1 at 0.4 MPa (the pure-water flux is 1199 L m −2 h −1 under the same pressure). Moreover, the membrane maintained a high removal efficiency under neutral and alkaline conditions (pH 7–11), exhibited good tolerance toward common inorganic ions except phosphate, and demonstrated satisfactory reusability. This study presents an effective strategy for integrating selective separation and targeted adsorption into thin-film composite membranes. The proposed design also provides new insights into the efficient remediation of aged nanoplastics with broad size distributions in complex aqueous environments.
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2026
·
IF 7.9
Gang Tang,Zhen Zhang,Wenhao Li,Mingjie Guo,Ying Pan,Wei Wang,Tingxuan Yan,Lulu Xu,Dong Wang,Fan Wu,Xiuyu Liu
Modern environments impose complex safety requirements on textiles. Therefore, developing multifunctional textiles with integrated flame retardancy, electromagnetic interference (EMI) shielding, and antibacterial properties is of great significance. In this study, a robust ternary P/N/Ag nanocoating was constructed on cotton fabrics via layer-by-layer (LbL) assembly of phytic acid (PA) and polyethyleneimine (PEI), followed by the impregnation of a silver nanowire (AgNW) conductive network. This hierarchical architecture endowed the cotton fabric with exceptional multifunctionality. The optimized composite fabric exhibited superior fire safety, achieving a limiting oxygen index (LOI) of up to 49.8% and a 91.7% reduction in peak heat release rate (PHRR). Mechanistic investigation revealed that the AgNWs act as reinforcing skeletons within the intumescent char layer, significantly enhancing the condensed-phase barrier effect against heat and oxygen. Furthermore, the construction of a highly conductive network resulted in a low sheet resistance of 2.09 Ω·mm and an EMI shielding effectiveness (SE) of 32.65 dB in the X-band. Additionally, the functionalized fabric demonstrated excellent ultraviolet (UV) resistance (Ultraviolet Protection Factor (UPF) > 130) and strong antibacterial activity, with a 99.9% reduction rate against both E. coli and S. aureus . This work provides a facile and effective strategy for fabricating high-performance multifunctional textiles with promising applications in personal protection and smart electronics.
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DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Zhijie Ye,Shuangqiang Fang,Tiancheng Zhang,Haoliang Cheng,JiaQi Ou,Jiali Yu,Yixi Zhuang,Rongjun Xie,Le Wang
Mechanoluminescence (ML), a self-recovering and passive luminescent modality, offers a promising path toward tactile-visual all-optical neuromorphic computing, potentially overcoming the inefficiency of von Neumann architecture. However, existing ML materials are hindered by high response thresholds and single-mode luminescence, preventing sub-kPa perception and multilevel neural transmission. Here, we employ Li + /Dy 3+ co-doping in Sr 2 SiO 4 :Eu 2+ (LSSO) to implement a defect engineering strategy that synergistically optimizes oxygen vacancies and suppresses strontium vacancies, achieving dual breakthroughs in sensitivity and signal clarity. This approach yields a record-low ML threshold of 72 Pa—the only Pa-level system achieved without external electricity or elastomeric structural modifications. This material also responds to sunlight, force, and heat, emulating diverse synaptic functions like tactile/optic nerve perception, short-term potentiation, and memory. It exhibits a 7-s persistent ML with a signal-to-noise ratio of 20.57 which is 15.6 times higher than commercial SrAl 2 O 4 :Eu 2+ ,Dy 3+ , a micron-scale imaging resolution (≈200 µm), and a 36-hour memory capacity. These properties enable thermal-activated information awakening and visual imaging over 1000 cycles, with a memory accuracy 209% superior to the Ebbinghaus curve. This work not only advances the design of all-optical synapses but also forges a pivotal connection between ML and neuromorphic engineering, propelling energy-efficient, light-driven artificial intelligence.
研究领域:
生物医学工程
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神经工程
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材料科学
·
光学成像
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仿生感知
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智能材料
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光遗传学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yihan Song,Xu Ren,Yue Xiao,Zhihao Xiong,Qi Wang,Bin Liu
The continuous development of the global marine industry has posed significant challenges to sustainable development due to corrosion in marine engineering structures. While rust converters are regarded as cost-effective solutions for corrosion mitigation, existing technological advancements fail to meet the heightened demands of contemporary marine engineering practices. To address these limitations, an MXene–phytic acid–gallic acid (M–P–G) hybrid composite was synthesized by integrating two-dimensional nanomaterial Ti3C2Tx with organic acids (gallic acid and phytic acid). This composite achieved synergistic enhancement in both rust-conversion capability and corrosion inhibition performance. Experimental results demonstrated that the M–P–G composite with a mass fraction of 1.0 wt % formed a dense rust-conversion layer on substrates, significantly improving protective performance. The M–P–G/epoxy (EP) coating exhibited an impedance modulus of 1.51 × 109 Ω cm2, surpassing conventional coatings by 2 orders of magnitude. Furthermore, through density functional theory calculations combined with scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and Fourier transform infrared analyses, a corrosion protection mechanism was proposed. This mechanism elucidated the differential conversion capacities of the organic acids toward diverse corrosion products, providing critical insights for the rational design and evaluation of next-generation rust-conversion and anticorrosion materials.
研究领域:
材料科学
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腐蚀与防护
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海洋工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Peilei Zhou,Kaijie Yang,Li Liu,Qianqian Liu,Naizhong Zhang,Jia Xu
Solar-driven interfacial evaporation presents significant potential for seawater desalination and wastewater purification. However, prolonged operation in marine environments often results in salt accumulation, which adversely impacts the performance and lifetime of system. Despite the progress in material design, achieving efficient evaporation while mitigating salt crystallization remains challenging in high-salinity water. In this study, we synthesized a hierarchically structured C 18 H 37 -MXene/PA/MS evaporator employing a simple yet effective methodology specifically designed for applications in high-salinity water environments. The evaporator features a dual-region configuration, with an upper hydrophobic light-absorbing layer comprising modified MXene and polyamide (PA) membranes and a hydrophilic lower layer consists of hydrophilic melamine sponge (MS). This innovative design, incorporating an ultra-thin polyamide interlayer, significantly enhances interfacial stability, thereby mitigating the interfacial separation typically observed in conventional Janus materials during prolonged usage. Furthermore, the meticulous control over the thickness of the hydrophobic layer (5.54 μm) ensures optimal thermal insulation properties of the material. Consequently, the C 18 H 37 -MXene/PA/MS evaporator demonstrates an impressive evaporation rate of 1.49 kg m −2 h −1 under 1 sun illumination, with a high energy efficiency of 92.8 %. Furthermore, the Janus architecture ensures steady performance in high salinity conditions, sustaining a high evaporation rate of 1.46 kg m −2 h −1 even in a 20 wt% NaCl solution. Furthermore, under natural sunlight, the daily freshwater yield reaches 8.91 kg m −2 . The exceptional evaporation efficiency and robust salt resistance highlight its strong potential for water desalination and wastewater treatment, contributing to the advancement of sustainable water resource management.
研究领域:
材料科学
·
环境工程
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）