ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Pengcheng Zhang,Yi Feng,Mengjue Cao,Jianfeng Yao
Co 9 S 8 nanoparticles (NPs) anchored on carbonized melamine foam with polydopamine derived carbon coating (CMF-Co 9 S 8 -C) was successfully constructed for advanced lithium-ion battery anode. The sandwich-type structure consists of massive Co 9 S 8 NPs and dual N-doped carbon layers that not only accommodate the volume expansion effect but also shortens the transfer distance of Li + / e − . Moreover, the nanocomposite inherits 3D carbon network with hierarchical porous structure, which is beneficial for providing sufficient transport channels and contacting with electrolyte. With the prominent synergistic effects from structure and chemical properties, CMF-Co 9 S 8 -C hybrid compound exhibited high specific capacity of 645 mAh g − 1 at 0.5 A g − 1 after 200 cycles, and it delivered excellent cycling stability (520 mAh g − 1 ) under a high current (2 A g − 1 ) after 1000 cycles.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Jian Huang,Yibin Xu,Xiaoyi Zhang,Zhiwen Lei,Chen Chen,Yonghong Deng,Chaoyang Wang
Here a highly porous melamine sponge based matels absorbent (MF-PEI/CS 2 ) possessing abundent imine and dithiocarbamate groups was prepared via a simple two-step process including crosslinking reaction with polyethylenimine (PEI) under the assistance of epichlorohydrin and esterification with CS 2 under a basic condition. The combination of melamine sponge with large surface area and polyethylenimine and dithiocarbamate groups with strong metals chelating ability into one composite ensures MF-PEI/CS 2 sponge an excellent multi-metals removal performance. This monolithic product, which is easily separated from treated water, can quickly chelate amounts of metals in a short time as its absorption capacity reaches about 96% of the saturation absorption capacity (93 mg/g) in 25 min and reach the saturation point (97 mg/g) after 35 min without stirring toward Cu (II) ions.
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DOI
高影响因子
Surface Topography-Metrology and Properties
·
2022
·Vol. 10
·期 4
·045020
·
IF 2.185
Bo Lin,Wan-Yi Chen,Kwok-Ho Lam,Na Shi,Bo Shi,Ying Yang,Yu-Ma Yang,Fu-An He,Li-Wang Jiang
A fluorine-free strategy was developed for the hydrophobic modification of the melamine (MA) sponge, in which both the stearic acid-modified Fe3O4 nanoparticles (SA-Fe3O4) and the graphite oxide were immobilized on the MA sponge with the use of 3-aminopropyltriethoxysilane by a drop-coating method to prepare the SA-Fe3O4/GO/MA sponge for oil-water separation. The structure of the SA-Fe3O4/GO/MA sponge was investigated by FITR, WAXD, SEM, two-dimensional EDS mapping, TGA, and VSM. The contact angles of the SA-Fe3O4/GO/MA sponge prepared with different amounts of SA-Fe3O4 and GO were in the range of 140.2° − 145.0°, which confirmed the successful hydrophobic surface modification for the MA sponge. The demonstrations exhibited that the SA-Fe3O4/GO/MA sponge could separate the oil from the oil-water mixture by both direct absorption and gravity-driven filtration. Additionally, the SA-Fe3O4/GO/MA sponge possessed not only high absorption capacities for peanut oil, n-hexane, soybean oil, and diesel oil, but also good abilities of being able to recollect magnetically and reuse. The proposed preparation strategy and overall performance of SA-Fe3O4/GO/MA sponge were promising for the oil-water separation in the future.
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高影响因子
Collagen and Leather
·
2024
·Vol. 6
·期 1
·1-12
·
IF 0
Zhang Chi,Zhou Ji-bo,Sun Nan,Liao Xue-pin,Shi Bi
Melamine resin (MR), traditionally synthesized using melamine and formaldehyde, is widely used in the leather industry. However, the emission of free formaldehyde poses a significant challenge for conventional MR. To address the issues of aldehyde in MR, extensive research has been conducted. This paper introduces a novel aldehyde-free MR (LTSL) retanning agent synthesized using cyanuric chloride, l-lysine, and sodium sulfanilate. The chemical structure of LTSL was analyzed via Fourier transform infrared spectroscopy, nuclear magnetic resonance, and X-ray photoelectron spectroscopy. The presence of amino, carboxyl, and sulfonic acid groups in LTSL enhanced its storability and imparted LTSL with an amphoteric character. The isoelectric point of LTSL was optimized to reach 4.37, and LTSL exhibited an appropriate size distribution with an average particle size of 254.17 nm and achieved high absorption rates of 87.77% and 95.84% for retanning and fatliquoring agents, respectively. Consequently, the thickness rate of LTSL reached up to 37%, with no detectable formaldehyde. Notably, LTSL also demonstrated excellent physical and mechanical properties, primarily attributed to the coordination and electrostatic interactions between the chrome-tanned collagen fiber and amino/carboxyl groups in LTSL. This research presents an innovative approach for developing an aldehyde-free MR retanning agent, significantly contributing to the sustainable development of leather manufacturing. Graphical Abstract
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Pengcheng Ren,RuoYu Yang,Xiaoying Guo,Yang Guo
With the increasing complexity of electromagnetic environments, microwave absorbing materials that combine high-efficiency microwave attenuation with multifunctional capabilities have attracted considerable attention. Herein, porous Ti 3 C 2 T x was pre-constructed through H 2 O 2 etching and subsequently integrated with a dripping–squeezing–drying process and polydimethylsiloxane (PDMS) encapsulation to fabricate multifunctional porous Ti 3 C 2 T x /melamine foam (MF)/PDMS composites. The porous Ti 3 C 2 T x forms a continuous conductive network within the three-dimensional MF scaffold, providing efficient pathways for conductive loss. Meanwhile, the surface functional groups and lattice defects of porous Ti 3 C 2 T x induce dipole polarization and defect polarization, respectively. In addition, the abundant heterogeneous interfaces among MF, porous Ti 3 C 2 T x , and PDMS enhance interfacial polarization, while the three-dimensional porous scaffold further prolongs the propagation paths of electromagnetic waves and promotes multiple reflection and scattering. Benefiting from the synergistic optimization of multiple loss mechanisms and impedance matching, the porous Ti 3 C 2 T x /MF/PDMS composite prepared using a porous Ti 3 C 2 T x dispersion with a concentration of 6 mg/mL (PTMP-6) achieves a minimum reflection loss ( RL min ) of −61.29 dB and an effective absorption bandwidth ( EAB ) of 6.62 GHz, covering the entire Ku band. Moreover, PTMP-6 delivers a radar cross-section (RCS) reduction of 38.9 dB m 2 under normal incidence (0°), demonstrating remarkable radar scattering suppression capability. The low thermal conductivity of PTMP-6 (0.047 W m −1 K −1 ) effectively suppresses heat transfer and endows the composite with favorable infrared stealth performance. Furthermore, the composite foam exhibits excellent compressive resilience and cycling stability over 200 cycles at 70% strain, together with a stable piezoresistive sensing response, favorable flame-retardant performance, and surface hydrophobicity with a water contact angle of 126.4°, demonstrating its potential for practical applications in complex electromagnetic environments. This work provides an effective design strategy for constructing broadband and highly efficient MXene-based microwave absorbing materials with multiple functions.
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Haodong Sun,Hengyi Wang,Bing Li,Cheng Lian,Haiping Su,Jingkun Li,Honglai Liu
Solid polymer electrolytes (SPEs) are promising solutions to address insufficient energy density along with the safety risks brought by liquid electrolytes in commercial lithium-ion batteries. Nevertheless, SPEs are still limited by low room-temperature ionic conductivity and weak mechanical properties, which greatly restrict their practical application. In this work, a poly(ethylene oxide) (PEO)-based SPE composed of rigid substrates was proposed, which showcased a high Young’s modulus of 3.38 MPa. Meanwhile, with the inorganic MOF filler and organic succinonitrile (SN) plasticizer, the Z@MEL/PEO-SN SPE demonstrated a high ionic conductivity of 5.5 × 10–5 S·cm–1 and lithium transference number of 0.46 at 25 °C. The Li|Z@MEL/PEO-SN|Li symmetric cell could cycle stably for over 2000 h at a current density of 0.025 mA·cm–2 at ambient temperature. The Li|Z@MEL/PEO-SN|LiFePO4 full cell maintained a capacity retention of 94.2% after 100 cycles at room temperature at 0.2 C. These results suggest that this SPE is a promising candidate for the next generation of solid-state lithium-ion batteries with a high energy density and improved safety.
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DOI
高影响因子
AICHE JOURNAL
·
2026
·
IF 4.4
Weijian Lu,Guilin Li,Lulu Bai,Kaixin Tao,Min Wang,Yao-Feng Wang,Xiangping Zhang,Shaojuan Zeng
Conventional solid catalysts for melamine synthesis from urea suffer from low activity and rapid deactivation. Herein, we developed a series of hierarchical Beta zeolites with tunable architectures (hollow and non-hollow) and abundant acid sites via a facile hydrothermal strategy. The optimized hollow Ho-B30 catalyst achieved a remarkable 92.3% melamine yield under mild conditions (400°C, 0.4 MPa), outperforming conventional microporous zeolite and industrial catalyst by 112.7% and 47.0%, respectively. Systematic investigations revealed a synergy between hierarchical pores and acidity: the hollow hierarchical pores enhance molecular transport, improving accessibility and utilization of acid sites, which collectively boost the catalytic performance. The catalyst also exhibited excellent stability over five cycles. Meanwhile, an integrated temperature-controlled purification strategy enabled direct production of high-purity melamine (98.3%). Reaction pathways were further elucidated by comprehensive analyses and DFT calculations. This work provides fundamental insights into hierarchical pores-acidity synergy for the rational design of efficient zeolite catalysts.
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DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Stefen Stangherlin,Sihan Wang,Celine Fidella,Kate Kim,Juewen Liu
The adulteration of dairy products with melamine has created an urgent need for reliable, sensitive, and convenient detection methods. Since melamine can form extensive hydrogen bonding and stacking interactions with DNA bases, aptamers represent an attractive platform for melamine sensing. In this work, capture-SELEX was employed using two DNA libraries containing either 30 or 36 randomized nucleotides. The longer library generated a greater diversity of sequence families, including a dominant family featuring more than 30 conserved nucleotides, a structural motif unattainable with the shorter library. Comparison was made with previous length-dependent SELEX experiments. The highest affinity aptamers exhibited a dissociation constant (Kd) of ∼60 nM, as determined by isothermal titration calorimetry. Screening aptamer responses using a thioflavin T fluorescence assay revealed a pair of aptamers with opposite signal readouts, enabling melamine detection with limits of detection of 61 nM and 208 nM, respectively. In 5% (v/v) milk samples, limits of detection of 89 and 315 nM were achieved, respectively. Overall, this study advances understanding of the impact of library length on aptamer selection and provides a set of high affinity aptamers along with a robust, label-free strategy for melamine detection.
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DOI
PubMed
高影响因子
Science China-Materials
·
2026
·Vol. 69
·期 6
·3613-3630
·
IF 7.7
Liu Jinling,Lu Jiayu,Yang Baoqing,Huang Dongyan,Han Zhangqi,Zhang Yan,Wang Bibo,Qi Dongming,Wang Wei
To address the growing need for lightweight and multifunctional stealth materials in modern protective applications, this study presents an innovative melamine foam (MF)-based composite featuring an asymmetric dual-nano conductive network with integrated absorption-dominated electromagnetic interference (EMI) shielding, infrared (IR) stealth, and flame retardant properties. Inspired by Salisbury screen, the composites employ MF as an interlayer and flame-retardant thermoplastic polyurethane (TPU) nanofiber membrane as a substrate. The architecture features a carbon nanotubes (CNTs)-modified impedance matching nanofiber layer as the top absorber and a silver nanoparticles (AgNPs)-modified nanofiber layer as the highly conductive reflective bottom. Precise control of CNTs content and interlayer thickness enables tunable electromagnetic waves (EMWs) absorption, yielding a low reflection (0.03) and high EMI shielding effectiveness (79.23 dB) at 4.40 mm. Even at 1.40 mm, effective absorption-dominated shielding is maintained. And the performance remains stable under ultrasonic, compression, and bending, demonstrating high durability. Especially, the mechanism behind achieving absorption-dominated EMI shielding at a reduced thickness, which relies on destructive interference of EMWs enabled by the asymmetric dual-nano conductive network, is thoroughly elucidated. Additionally, the composite exhibits superior IR stealth and self-extinguishing properties. This work offers a feasible strategy for designing high-performance stealth materials with strong potential for personnel and communication equipment protection.
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高影响因子
WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 236
·期 13
·1-17
·
IF 3
Zhang Shoucun,Li Zhuomin,Yang Ning,Wu Wenli,Wang Yuan
As an important intermediate, p -nitrophenol has been widely used in the production of various chemicals, including pharmaceuticals, insecticides, and dyes, etc. However, it exhibits significant ecological toxicity and has a tendency to accumulate in organisms, even at very low concentrations. Therefore, it is essential to remove p -nitrophenol as thoroughly as possible from wastewater before discharging it into the environment. Among various treatment methods, physical adsorption stands out as a safe, reliable, and widely applicable approach, particularly suitable for small-scale water treatment applications. In this study, a melamine/terephthalaldehyde-based material (PMT) with a rich mesoporous structure was synthesized. The presence of abundant nitrogen elements within the material’s structure enhances its adsorption capacity for p -nitrophenol. Subsequently, PMT was dispersed as the dispersed phase into a hydrogel (HGel) structure through post-polymerization, which improved the material’s stability during use. Experimental results demonstrated that the gel composite material achieved a 97.6% adsorption removal rate for p -nitrophenol-contained wastewater. Moreover, after six cycles of reuse, the material retained an adsorption removal rate of 84.2%, highlighting its excellent adsorption performance and reusability.
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2015
·
IF 2.752
Xue Jiao Liu,Hai Qiang Li,Xin Yu Lin,Heng Yi Liu,Guang Hui Gao
Microspheres could be utilized in the industrial waste water treatment due to their huge specific surface areas and surficial functional groups, which possibly adsorb heavy metal ions in the industrial waste. Melamine-formaldehyde (MF) microspheres were easily prepared as mono-dispersed micro-sized particles with a smooth surface. However, these rich amine groups in MF microspheres were frequently ignored for heavy metal ions adsorption owing to coordination effects. In this paper, a rough and bumpy siloxane-modified melamine-formaldehyde (Si–MF) microsphere was prepared using a dispersion polymerization method. Based on the experimental measurement, it is found that the particle size, surface morphology and dispersion state of Si–MF microspheres were significantly influenced by dispersing agent dosages, reaction temperature and pH. And Si–MF microspheres can be degraded in low pH. Moreover, the adsorption of the metal ions (Cu 2+ , Pb 2+ and Ni 2+ ) by Si–MF microspheres was also measured by an Inductive Coupled Plasma (ICP) instrument. The result indicated that the Si–MF microsphere showed a high adsorption capability for metal ions, especially Pb 2+ as a potential metal ion trapping agent.
研究领域:
环境科学
·
材料化学
·
水处理技术
·
高分子化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Yuzhe Liu,Xueda Du,Anyu Li,Yingyue Teng,Xuan He,Guangjie Shao,Xulei Sui,Zhenbo Wang
Pt 3 Co catalysts represent promising substitutes for commercial Pt/C catalysts for proton exchange membrane fuel cells, yet their scalable deployment is restricted by inefficient synthesis, insufficient activity and stability. Herein, a functional molecular layer was in-situ constructed on platinum surfaces with the melamine assistance. Melamine acted as a molecular bridge to enrich Co on Pt via hydrogen-bonding interactions and facilitate Pt Co charge transfer. Subsequent medium–low temperature heat treatment yielded a highly ordered Pt 3 Co with strong compressive strain. The catalyst delivers a half-wave potential (E 1/2 ) of 0.928 V in acidic electrolyte. It exhibits merely 12 mV decay in E 1/2 and 1.5% loss of the electrochemical active surface area after durability test. At low Pt loading, it achieves high power densities of 2.94 W cm −2 for H 2 –O 2 fuel cells and 1.11 W cm −2 for H 2 –Air fuel cells, respectively. Compressive strain weakens the adsorption of intermediate and product H 2 O and accelerates reaction kinetics. Meanwhile, the ordered intermetallic structure and robust Pt Co interaction enhance structural stability. This strategy enables the mild and scalable fabrication of high performance ordered Pt 3 Co catalysts. The melamine molecular layer anchored on the platinum surface facilitates cobalt enrichment and promotes interfacial electron transfer, enabling the formation of a highly strained, ordered Pt 3 Co intermetallic catalyst. This structural evolution significantly accelerates the reaction kinetics while concurrently enhancing catalytic stability. Download: Download high-res image (132KB) Download: Download full-size image
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高影响因子
危险品化学品经营许可证（带存储）