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Synergistic engineering of phosphaphenanthrene and ionic liquids for unlocking flame retardant multifunctional epoxy resin with high performances

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Polymer Degradation and Stability 2025年 239卷

作者： Wang, Hao Wang, Yadong Gao, Jingjing Zhu, Zongmin Xiao, Fei College of Materials Science and Engineering Hubei Key Laboratory for New Textile Materials and Applications Wuhan Textile University Wuhan430200 China State Key Laboratory of Advanced Polymeric Materials College of Polymer Science and Engineering Sichuan University Chengdu610064 China School of Safety Science and Emergency Management Wuhan University of Technology Wuhan430070 China

Herein, we presented a multifunctional epoxy resin (EP) composite prepared by the synergistic combination of DOPO and ionic liquids (ILs). The optimized EP-DOPO/ILs system demonstrated exceptional flame retardancy, with only 3 wt% of flame retardant (DOPO/ILs) added to achieve UL-94 V-0 grade for EP and a limiting oxygen index (LOI) of 33.4 %. Cone calorimeter test revealed 32.2 % and 26.7 % reductions in peak of heat release rate (pHRR) and total smoke production (TSP), respectively, compared to neat EP. Notably, the designed rigid-flexible epoxy network simultaneously enhanced tensile strength to 75.7 MPa (+15.7 %) and impact strength to 24.8 kJ m-2 (+136.3 %), outperforming conventional EP thermosets. Furthermore, the EP composites retained 90 % visible light transmittance while exhibiting ultraviolet (UV) shielding efficiency and intrinsic fluorescence. This multi-component collaborative system provides an important experimental foundation for developing high-performance multifunctional polymeric materials. © 2025 Elsevier Ltd

关键词： Fire protection

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Broadband achromatic metalens design based on artificial neural network

Broadband achromatic metalens design based on artificial neu...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Feilou Wang Guangzhou Geng Xueqian Wang Junjie Li Yang Bai Jianqiang Li Yongzheng Wen Bo Li Jingbo Sun Ji Zhou School of Materials Science and Engineering State Key Laboratory of New Ceramics and Fine Processing Tsinghua University Beijing China Institute of Physics Beijing National Laboratory for Condensed Matter Physics Chinese Academy of Sciences Beijing China Institute for Advanced Materials and Technology Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing Beijing China Institute of Process Engineering CAS Key Laboratory of Green Process and Engineering National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Chinese Academy of Sciences Beijing China Tsinghua Shenzhen International Graduate School Shenzhen China

We used the backpropagation neural network to design a high performance achromatic metalens at visible range. Experimental demonstration showed that the fabricated achromatic metalens can operate from 420 to 640 nm wi... 详细信息

ISBN: (数字)9781957171050

ISBN: (纸本)9781665466660

关键词： Backpropagation Artificial neural networks Lasers and electrooptics Broadband communication Electrooptical waveguides

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Hybridized Propagation of Spin Waves and Surface Acoustic Waves in a Multiferroic-Ferromagnetic Heterostructure

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Physical Review Applied 2023年第2期19卷 024046-024046页

作者： Jilei Chen Kei Yamamoto Jianyu Zhang Ji Ma Hanchen Wang Yuanwei Sun Mingfeng Chen Jing Ma Song Liu Peng Gao Dapeng Yu Jean-Philippe Ansermet Ce-Wen Nan Sadamichi Maekawa Haiming Yu International Quantum Academy Shenzhen 518048 China Fert Beijing Institute MIIT Key Laboratory of Spintronics School of Integrated Circuit Science and Engineering Beihang University Beijing 100191 China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen China Advanced Science Research Center Japan Atomic Energy Agency Tokai Ibaraki 319-1195 Japan RIKEN Center for Emergent Matter Science Wako Saitama Japan State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing China Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials and International Center for Quantum Materials and Electron Microscopy Laboratory School of Physics Peking University Beijing China Institute of Physics École Polytechnique Fédérale de Lausanne (EPFL) Lausanne Switzerland Kavli Institute for Theoretical Sciences University of Chinese Academy of Sciences Beijing China

Coherent coupling in magnon-based hybrid systems has many potential applications in quantum information processing. Magnons can propagate in magnetically ordered materials without any motion of electrons, offering a unique method to build low-power-consumption devices and information channels free of heat dissipation. In this paper, we demonstrate the coherent propagation of hybridized modes between spin waves and Love surface acoustic waves in a multiferroic BiFeO3 and ferromagnetic La0.67Sr0.33MnO3-based heterostructure. The magnetoelastic coupling enables a giant enhancement of the strength of the hybridized mode by a factor of 26 compared to that of the pure spin waves. A short wavelength down to 250 nm is demonstrated for the hybridized mode, which is desirable for nanoscale acoustomagnonic applications. Our combined experimental and theoretical analyses represent a step towards the coherent control in hybrid magnonics, which may inspire the study of magnon-phonon hybrid systems for coherent information processing and manipulation.

关键词： Magnetoelastic effect Magnons Phonons Quantum information with hybrid systems Ferromagnets Multiferroics Transducers Surface acoustic wave

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Fabrication of Polyurethane/Polyurethane Yarn Composite Film with Enhanced Mechanical Property

Fabrication of Polyurethane/Polyurethane Yarn Composite Film...

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作者： Jia-Jing Zhang Huan Zhang Liang-Jun Xia Wei-Lin Xu Chun-Hua Zhang State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University State Key Laboratory of Silkworm Genome Biology Ministry of Agriculture Southwest University

To obtain synthetic leather with enhanced mechanical properties, we proposed a simple composite fabrication method based on nonsolvent induced phase separation for preparing polyurethane yarn(PUY) reinforced polyurethane(PU) composite films. The morphology of PU/PUY matrix interface and the mechanical properties of the as-prepared composite films were investigated in detail. The results showed that the addition of PUY did not change the microstructure of the PU. The stress and strain of PU/PUY-3 were 61.98% and 32.60% higher than that of PU film. It was proposed that the good interfacial interaction between PUY and PU mainly contributed to the simultaneously improvement in stress and strain. Furthermore, the as-prepared PU/PUY composite films were elastic within the applied tensile strain of 10%. The present work suggests an efficient way to reinforce PU matrix and can be used for design and optimization of leather products.

关键词： Polyurethane Fiber Interface Mechanical Property

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Unconventional Heterobidentate Coordination of 4-Hydroxypyridine Leading to Remarkably Strong Second-Harmonic Generation in Zn(C5H4NO)2

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Angewandte Chemie 2024年第9期137卷

作者： Can Yang Jie Gou Yaolong Zhu Yi Xiong Zece Zhu Ling Chen Qi Wu State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan 430200 People's Republic of China These authors contributed equally College of Chemistry Beijing Normal University Beijing 100875 People's Republic of China

Herein, we report an unconventional heterobidentate coordination mode of conventional 4-hydroxypyridine ligand in a novel compound Zn(C 5 H 4 NO) 2 . The strong heterobidentate coordination interactions between Zn 2+ and 4-hydroxypyridine ligands promote a uniform alignment of the polarization of each [ZnO 2 N 2 ] tetrahedral building unit, resulting in remarkably strong second-harmonic generation (SHG) with an intensity that is the largest among all UV-transparent Zn-containing metal-organic compounds reaching 13.6×KDP. Moreover, Zn(C 5 H 4 NO) 2 processes a suitable optical band gap of 4.40 eV, high thermal stability up to 300 °C, excellent air stability, and strong water resistance, demonstrating great application potential. Additionally, Zn(C 5 H 4 NO) 2 exhibits photoluminescence with a significantly enhanced lifetime of 558 ms, accompanied by a rare blue afterglow visible to the naked eye, lasting up to 5 s.

关键词： Heterobidentate Coordination Polarization Alignment NCS SHG Metal-organic Complexes

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Interfacial design for detection of a few molecules

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Chemical Society reviews 2023年第2期52卷 779-794页

作者： Ying Dong Jing Li Christoph Janiak Xiao-Yu Yang Department of Forensic Medicine Tongji Medical College Huazhong University of Science and Technology 13 Hangkong Road Wuhan 430030 China. Shenzhen Huazhong University of Science and Technology Research Institute 9 Yuexing Third Road Nanshan District Shenzhen 518000 China. Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials School of Chemistry and Chemical Engineering Wuhan University of Science and Technology 947 Peace Avenue Wuhan 430081 China. jli82@***. Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao) Wuhan University of Technology 122 Luoshi Road Wuhan 430070 China. xyyang@***. School of Engineering and Applied Sciences Harvard University Cambridge Massachusetts 02138 USA. xyyang@seas.harvard.edu.

Major advances in molecular detection are being driven by goals associated with the development of methods that are amenable to miniaturization and automation, and that have high sensitivity and low interference. The new detection methods are confronted by many interfacial issues, which when properly addressed can lead to improved performance. One interfacial property, special wettability, can facilitate precise delivery and local enrichment of molecules to sensing elements. This review summarizes applications of unique features of special wettability in molecular detection including (1) chemical and electrochemical reactions in anchored microdroplets on superwetting surfaces, (2) enrichment of analytes and active materials at low contact areas between droplets and superwetting surfaces, (3) complete opposite affinities of superwetting surfaces toward nonpolar/polar solutes and oil/water phases, and (4) directional droplet transportation on asymmetric superwetting surfaces. The challenges and opportunities that exist in design and applications of special wettability in interfacial delivery and enrichment for detection of a few molecules are also discussed.

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In-situ precipitation enabled Bi/BiFeO 3 Schottky junction with an electronic tunnel for promoting photocatalytic ammonia synthesis

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Applied Catalysis B: Environment and Energy 2025年 378卷

作者： Zhaowu Zeng Yongchao Wang Xiaoyi Liu Bing He Jian Ding Zhen Li Panxing Zhu Huan Wang Yanli Zhao Yang Wang Faculty of Materials Science and Chemistry China University of Geosciences Wuhan 430074 PR China School of Chemistry Chemical Engineering and Biotechnology Nanyang Technological University Singapore 637371 Singapore State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan 430200 PR China

Metallic bismuth (Bi) has garnered significant attention in the field of photocatalytic nitrogen reduction owing to its remarkable nitrogen activation and hydrogen evolution inhibition. However, the effectiveness of Bi is still hindered by the electron transport obstruction caused by the Schottky junction between the semiconducting scaffolds. In this work, Bi metal nanoparticles were constructed on the surface of BiFeO 3 photocatalyst (Bi/BFO) by a simple in-situ precipitation method. The Bi nanoparticles prepared by this process not only provides sites for nitrogen adsorption/activation, but also facilitates the formation of a gradient doping of Fe 2 + produced by BFO during the precipitation process, effectively establishing an electronic tunnel at the interface of Bi and BFO. The improved Schottky junction with unidirectional electron transport provides sufficient electrons for nitrogen reduction at the Bi sites, and collaboratively enhances photocatalytic efficiency for nitrogen reduction. Consequently, the NH 3 yield of the optimized Bi/BFO reaches 202.5 μmol g − 1 h − 1 . This study presents an optimized approach for efficient implementation of Schottky junction in photocatalytic nitrogen reduction.

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PTCDA/CuS cathode enabling stable sulfide-based all-solid-state batteries

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Journal of Materiomics 2025年

作者： Zhixing Wan Shuo Wang Yahao Mu Ruihua Zhou Hang Liu Tingwu Jin Di Wu Jianlong Xia Ce-Wen Nan Center of Smart Materials and Devices State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering Wuhan University of Technology Wuhan 430070 China School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Wuhan 430070 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China

Organic cathode materials have garnered significant attention for their potential application in lithium-ion batteries due to their lightweight nature, tunable structures, high energy density, and environmental friendliness. However, the dissolution of organic cathodes in liquid electrolytes often leads to poor cycling stability, which limits their practical application. In this study, a composite cathode was prepared by ball milling the PTCDA/CuS (perylene-3,4,9,10-tetracarboxylic dianhydride, PTCDA) with a sulfide-based electrolyte and carbon nanotubes. By optimizing the component ratios, the assembled all-solid-state batteries (ASSBs) show a high discharge capacity of 210 mA⸱h/g after 200 cycles without any capacity degradation at a current density of 33.0 mA/g. Through comprehensive characterization techniques including X-ray diffraction (XRD), Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS), the coordination of Cu 2+ and the formation of sulfur-linked polymers during the charge-discharge processes are elucidated, and the reversibility of the electrochemical reactions has been confirmed. This work highlights the excellent compatibility between organic cathodes and sulfide-based electrolytes, providing a new way for the development of high-performance ASSBs with high energy density and extended lifespan.

关键词： PTCDA/CuS lithium argyrodite organic cathode all-solid-state battery

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基于低色散材料的高效宽带消色差微透镜设计（英文）

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Engineering 2024年第7期 194-200页

作者： Xueqian Wang Chuanbao Liu Feilou Wang Weijia Luo Chengdong Tao Yuxuan Hou Lijie Qiao Ji Zhou Jingbo Sun Yang Bai Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and Technology University of Science and Technology Beijing School of Materials and Engineering University of Science and Technology Beijing State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University

Metalenses with achromatic performance offer a new opportunity for high-quality imaging with an ultracompact configuration;however,they suffer from complex fabrication processes and low focusing *** this study,we propose an efficient design method for achromatic microlenses on a wavelength scale using materials with low dispersion,an adequately designed convex surface,and a thickness profile *** taking into account the absolute chromatic aberration,relative focal length shift (FLS),and numerical aperture (NA),microlens with a certain focal length can be realized through our realized map of geometric ***,the designed achromatic microlenses with low-dispersion fused silica were fabricated using a focused ion beam,and precise surface profiles were *** fabricated microlenses exhibited a high average focusing efficiency of 65%at visible wavelengths of 410–680 nm and excellent achromatic capability via white light ***,the design exhibited the advantages of being polarization-insensitive and *** results demonstrate the effectiveness of our proposed achromatic microlens design approach,which expands the prospects of miniaturized optics such as virtual and augmented reality,ultracompact microscopes,and biological endoscopy.

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Reconfiguring the Hydrogen Networks of Aqueous Electrolyte to Stabilize Iron Hexacyanoferrate for High-Voltage pH-Decoupled Cell

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Angewandte Chemie 2024年第42期136卷

作者： Zi-Long Xie Prof. Yunhai Zhu Jia-Yi Du Dong-Yue Yang Ning Zhang Qi-Qi Sun Prof. Gang Huang Prof. Xin-Bo Zhang State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China School of Applied Chemistry and Engineering University of Science and Technology of China Hefei 230026 China These authors contributed equally State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan 430200 China

Prussian blue analogs (PBAs) are promising insertion-type cathode materials for different types of aqueous batteries, capable of accommodating metal or non-metal ions. However, their practical application is hindered by their susceptibility to dissolution, which leads to a shortened lifespan. Herein, we have revealed that the dissolution of PBAs primarily originates from the locally elevated pH of electrolytes, which is caused by the proton co-insertion during discharge. To address this issue, the water-locking strategy has been implemented, which interrupts the generation and Grotthuss diffusion of protons by breaking the well-connected hydrogen bonding network in aqueous electrolytes. As a result, the hybrid electrolyte enables the iron hexacyanoferrate to endure over 1000 cycles at a 1 C rate and supports a high-voltage pH-decoupled cell with an average voltage of 1.95 V. These findings provide insights for mitigating the dissolution of electrode materials, thereby enhancing the viability and performance of aqueous batteries.

关键词： Aqueous battery Prussian blue analog dissolution Hydrogen bonds Electrochemistry

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