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advanced Materials 2020年第10期59卷 3938-3944页

作者： Tian, Chun Wang, Peng Ni, Yuanyuan Zhang, Lifen Cheng, Zhenping Zhu, Xiulin State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou215123 China

Herein, near-infrared (NIR) photocontrolled iodidemediated reversible-deactivation radical polymerization (RDRP) of methacrylates, without an external photocatalyst, was developed using an alkyl iodide (e.g., 2-iodo-2-methylpropionitrile) as the initiator at room temperature. This example is the first use of a series of special solvents containing carbonyl groups (e.g., 1,3-dimethyl-2-imidazolidinone) as both solvent and catalyst for photocontrolled RDRP using long-wavelength (λmax=730 nm) irradiation. The polymerization system comprises monomer, alkyl iodide initiator, and solvent. Well-defined polymers were synthesized with excellent control over the molecular weights and molecular weight distributions (Mw/Mn © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

关键词： Solvents

Unraveling Dynamic Helicity Inversion and Chirality Transfer through the Synthesis of Discrete Azobenzene Oligomers by an Iterative Exponential Growth Strategy

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Angewandte Chemie 2023年第5期136卷

作者： Xiao Wang Zhihong Yu Zhihao Huang Nianchen Zhou Xiaoxiao Cheng Zhengbiao Zhang Wei Zhang Xiulin Zhu State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China State Key Laboratory of Radiation Medicine and Protection Soochow University Suzhou 215123 China

Boriding of Tungsten by the Powder-Pack Process: Phase Formation, Growth Kinetics and Enhanced Neutron Shielding

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SSRN 2022年

作者： Liu, Yue Liu, Xiaoyi Lai, Chen Ma, Jie Meng, Xianfang Zhang, Long Xu, Guanglong Lu, Yiwen Li, Hongyi Wang, Jinshu Chen, Shuqun Key Laboratory of Advanced Functional Materials Education Ministry of China Faculty of Materials and Manufacturing Beijing University of Technology Beijing100124 China Beijing Research Center for Radiation Application Co. Ltd. Beijing Radiation Materials Key Laboratory China Tech Institute for Advanced Materials College of Materials Science and Engineering Nanjing Tech University Nanjing210009 China China Ship Development and Design Center Wuhan430074 China

In this study, high-quality tungsten boride coating was grown on pure tungsten substrate by solid boriding method for improved neutron shielding ability. The microstructure, growth kinetics and radiation shielding performance were systematically studied. It is found that the boronized layer shows a dual-phase structure under the boriding temperature of 950-1050 ℃. The main layer close to coating surface is identified to be the WB phase, while the inner layer adjacent to the substrate is W2B. Thermodynamics calculation proves the W2B is more favored to nucleate and grow adhering to W than α-WB. Once the W2B layer was formed, further increasing boron concentration enables to introduce the formation of WB at the interface. On the basis of the calculated W-B phase diagram, two separated diffusion models were developed to elucidate the growth of WB with composition gradient and W2B with constant composition. The diffusion coefficients of boron in boride phases as well as the activation energy for boron diffusion were estimated. Finally, the large improvement of neutron attenuation ability for tungsten specimen upon boriding treatment was demonstrated. Our findings could provide new directions for developing high performance radiation shielding materials. © 2022, The Authors. All rights reserved.

关键词： Growth kinetics

Fabrication of Multifunctional Composite Nanofibrous Membranes for Antibacterial, Waterproof, and Broad-Range Microwave Absorption Properties

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SSRN 2023年

作者： Alassod, Abeer Abdalla, Ibrahim Sattar, Mamoona Shahriari-Khalaji, Mina Al Hinnawi, Mhd Firas State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai "Belt & Road" Joint Laboratory of Advanced Fibers and Low-dimension Materials College of Materials Science and Engineering Donghua University Shanghai201620 China Textile Industries Mechanical Engineering and Techniques Department Faculty of Mechanical and Electrical Engineering Damascus University Damascus Syria Shanghai Key Laboratory for Development and Application of Metal Functional Materials School of Materials Science & Engineering Tongji University Shanghai201804 China College of Biological Science and Medical Engineering Donghua University Shanghai201620 China

Given the rapid growth of electrical engineering, the scope of electromagnetic (EM) wave absorption materials has piqued global interest, but their fabrication remains a significant challenge. Herein, the multifunctional EM wave absorption characteristics of nanoparticles were demonstrated. Polyacrylonitrile (PAN) and Polyvinyl alcohol (PVA) were electrospun with varying ratios of cobalt and iron nanoparticles (Co and Fe) NPs, followed by carbonization. Based on the measured EM parameters, it was found that carbon nanofibers containing 0.6 Co and Fe (CNFs0.6-Co@Fe3) exhibited the best microwave absorption performance. The reflection loss (RL) of 29.10 dB at 15-20 GHz with a thickness of 1.5 mm while CNFs0.3-Co@Fe3 showed RL of-11.90 dB at 15-20 GHz at a thickness of 1 mm. Antibacterial activity testing revealed that CNFs0.6-Co@Fe3 exhibited the highest activity against Escherichia coli (E. coli). Besides, the hydrophobicity of the nanomembranes augmented with a contact angle of more than 100° after carbonization and increasing NPS content. New nanostructured membranes possessed notable hydrophobicity with a water contact angle larger than 95° and low surface energy. Due to its excellent characteristics, cost-effective fabrication strategy, environmental friendliness, lightweight, and good microwave absorption, the as-prepared membrane could serve as an economical and multifunctional product. © 2023, The Authors. All rights reserved.

关键词： Hydrophobicity

Ce and Er Co-doped TiO2 for rapid bacteria- killing using visible light

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Bioactive Materials 2020年第2期5卷 201-209页

作者： Yawei Ren Yajing Han Zhaoyang Li Xiangmei Liu Shengli Zhu Yanqin Liang Kelvin Wai Kwok Yeung Shuilin Wu The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China School of Materials Science&EngineeringTianjin UniversityTianjin300072China Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Key Laboratory of Polymer MaterialsSchool of Materials Science&EngineeringHubei UniversityWuhan430062China Department of Orthopaedics&Traumatology Li Ka Shing Faculty of MedicineThe University of Hong KongPokfulamHong Kong999077China

Bacterial infection and related diseases are threatening the health of human *** disinfection as a simple and low-cost disinfection strategy is attracting more and more *** this work,TiO2 nanoparticles(NPs)were modified by co-doping of Ce and Er using the sol-gel method,which endowed TiO2 NPs with enhanced visible light photocatalytic performance but not pure ultraviolet photocatalytic properties compared the untreated *** results disclosed that as the doping content of Er increased,the photocatalytic activity of modified TiO2 NPs initially increased and subsequently *** same trend occurred for Ce *** the doping dose of Er and Ce is 0.5 mol%and 0.2 mol%,the 0.5Ce0.2Ti-O calcined at 800℃ presented the best antibacterial properties,with the antibacterial efficiency of 91.23%and 92.8%for Staphylococcus aureus and Escherichia coli,*** existence of Er ions is thought to successfully turn the near-infrared radiation into visible region,which is easier to be absorbed by TiO2 ***,the addition of Ce ions can effectively extend spectral response range and inhibit the recombination of electrons and holes,enhancing the photocatalytic disinfection activity of co-doped TiO2.

关键词： Photocatalytic TiO2 Antibacterial Doping Light responsive

Fabrication of Multifunctional Composite Nanofibrous Membranes for Antibacterial, Waterproof, and Broad-Range Microwave Absorption Properties

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SSRN 2023年

作者： Alassod, Abeer Abdalla, Ibrahim Sattar, Mamoona Shahriari-Khalaji, Mina Al Hinnawi, Mhd Firas Textile Industries Mechanical Engineering and Techniques Department Faculty of Mechanical and Electrical Engineering Damascus University Damascus Syria State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai "Belt & Road" Joint Laboratory of Advanced Fibers and Low-dimension Materials College of Materials Science and Engineering Donghua University Shanghai201620 China Shanghai Key Laboratory for Development and Application of Metal Functional Materials School of Materials Science & Engineering Tongji University Shanghai201804 China College of Biological Science and Medical Engineering Donghua University Shanghai201620 China

Given the rapid growth of electrical engineering, the scope of electromagnetic (EM) wave absorption materials has piqued global interest, but their fabrication remains a significant challenge. Herein, the multifunctional EM wave absorption characteristics of nanoparticles were demonstrated. Polyacrylonitrile (PAN) and Polyvinyl alcohol (PVA) were electrospun with varying ratios of cobalt and iron nanoparticles (Co and Fe) NPs, followed by carbonization. Based on the measured EM parameters, it was found that carbon nanofibers containing 0.6 Co and Fe (CNFs0.6-Co@Fe3) exhibited the best microwave absorption performance. The reflection loss (RL) was 29.10 dB at 15-20 GHz with a thickness of 1.5 mm, while CNFs0.3-Co@Fe3 showed RL of 11.90 dB at 15-20 GHz at a thickness of 1 mm. Antibacterial activity testing revealed that CNFs0.6-Co@Fe3 exhibited the highest activity against Escherichia coli (E. coli). Besides, the hydrophobicity of the nanomembranes augmented with a contact angle of more than 100° after carbonization and increasing NPS content. New nanostructured membranes possessed notable hydrophobicity with a water contact angle larger than 95° and low surface energy. Due to its excellent characteristics, cost-effective fabrication strategy, environmental friendliness, lightweight, and good microwave absorption, the as-prepared membrane could serve as an economical and multifunctional product. © 2023, The Authors. All rights reserved.

关键词： Hydrophobicity

Tribological performance of ionic liquid-lubricated carbon brush/collector ring current-carrying friction system

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Biosurface and Biotribology 2020年第4期6卷 104-113页

作者： Yang Fu Hongling Qin Xiang Xu Xiaolong Zhang Zhiguang Guo Hubei Key Laboratory of Hydroelectric Machinery Design&Maintenance China Three Gorges UniversityHubei Yichang 443002People’s Republic of China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000People’s Republic of China Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei UniversityWuhan 430062People’s Republic of China

The lubricity and anti-wear ability of ionic liquids(ILs)were studied by a current-carrying friction test on IL-lubricated carbon *** results indicated that the conductivity and wear resistance of different ILs are different,and may vary for different carbon *** E468e carbon brush was found to be more sensitive to IL lubrication than D172 carbon ***,an analysis of the wear surfaces of the D172 and E468e carbon brushes revealed that,due to the different materials of the two carbon brushes and the composition of the IL,the lubrication effect on the carbon brushes was *** viscosity of the IL will affect its wettability on the carbon brush *** better the wettability,the easier the movement of ions on the surface,which makes it easier to form a conductive physical adsorption ***,in practice,a better IL must be selected by considering the wettability of IL and carbon brushes.

关键词： friction wear carbon

Quasi-solid-state polymer plastic crystal electrolyte for subzero lithium-ion batteries

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Journal of Energy Chemistry 2020年第7期29卷 87-93,I0003页

作者： Yumei Zhou Fengrui Zhang Peixin He Yuhong Zhang Yiyang Sun Jingjing Xu Jianchen Hu Haiyang Zhang Xiaodong Wu i-Lab Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of SciencesSuzhou 215123JiangsuChina Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Key Laboratory for the Synthesis and Application of Organic Functional MoleculesMinistry of EducationCollege of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062HubeiChina National Engineering Laboratory for Modern Silk College of Textile and Clothing EngineeringResearch Center of Cooperative Innovation for Functional Organic/Polymer Material Micro/NanofabricationSoochow University199 Ren-Ai RoadSuzhou Industrial ParkSuzhou 215123JiangsuChina

Succinonitrile(SN)-based polymer plastic crystal electrolytes(PPCEs)have attracted considerable attention as solid-state electrolytes owing to their high ionic conductivities similar to those of liquid electrolytes,excellent contacts with the electrodes,and good mechanic *** a crucial property of a solid-state electrolyte,the ionic conductivity of the PPCE directly depends on the interactions between the constituent parts including the polymer,lithium salt,and SN.A few studies have focused on the effects of polymer–lithium–salt and polymer–SN interactions on the PPCE ionic ***,the impact of the lithium–salt–SN combination on the PPCE ionic conductivity has not been *** particular,tuning of the lithium-salt–SN interaction to fabricate a subzero PPCE with a high low-temperature ionic conductivity has not been *** this study,we design and fabricate five PPCE membranes with different weight ratios of Li N(SO2 CF3)2(Li TFSI)and SN to investigate the effect of the Li TFSI–SN interaction on the PPCE ionic *** ionic conductivities of the five PPCEs are investigated in the temperature range of–20 to 60°C by electro-chemical impedance *** interaction is analyzed by Fourier-transform infrared spectroscopy,Raman spectroscopy,and differential scanning *** Li TFSI–SN interaction significantly influences the melting point of the PPCE,dissociation of the Li TFSI salt,and thus the PPCE ionic *** tuning the Li TFSI–SN interaction,a subzero workable PPCE membrane having an excellent low-temperature ionic conductivity(6×10-4 S cm–1 at 0°C)is *** electro-chemical performance of the optimal PPCE is evaluated by using a Li Co O2/PPCE/Li4 Ti5 O12 cell,which confirms the application feasibility of the proposed quasisolid-state electrolyte in subzero workable lithium-ion batteries.

关键词： Succinonitrile polymer plastic crystal electrolyte Ionic conductivity Lithium-salt–succinonitrile interaction Subzero lithium-ion battery

Rapidly Reversible Superwettability on Textured Metallic Surfaces

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SSRN 2024年

作者： Zou, Xianrui Zhang, Yongguang Fang, Wei Jiang, Hui Yang, Zhilu Li, Qunyang Wu, Shuilin Wang, Hongshui Wang, Donghui Zhou, Huan Yang, Tai Xia, Dan Liu, Ning Yang, Qiang Yang, Lei Feng, Xiqiao Liang, Chunyong Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Materials Science and Engineering Hebei University of Technology Tianjin300130 China Applied Mechanics Laboratory Department of Engineering Mechanics Institute of Biomechanics and Medical Engineering Tsinghua University Beijing100084 China School of Materials Science and Engineering Tianjin University Tianjin300350 China Tianjin Key Laboratory of Composite and Functional Materials Tianjin300350 China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education Tianjin300350 China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Tianjin300350 China Dongguan Key Laboratory of Smart Biomaterials and Regenerative Medicine The Tenth Affiliated Hospital of Southern Medical University Guangdong Dongguan523059 China Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation Guangdong Guangzhou510080 China Department of Cardiology Third People's Hospital of Chengdu Affiliated to Southwest Jiaotong University Sichuan Chengdu610031 China State Key Laboratory of Tribology in Advanced Equipment Tsinghua University Beijing100084 China School of Materials Science & Engineering Peking University Beijing100871 China Biomedical Materials Engineering Research Center Hubei Key Laboratory of Polymer Materials Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials School of Materials Science & Engineering State Key Laboratory of Biocatalysis and Enzyme Engineering Hubei University Wuhan430062 China Center for Health Science and Engineering Hebei Key Laboratory of Biomaterials and Smart Theranostics School of Health Sciences and Biomedical Engineering Hebei University of Technology Tianjin300130 China Department of Spine Surgery Tianjin Hospital Tianjin University Tianjin30021 China

Reversible superwettability on non-coated metallic surfaces has a broad range of engineering applications, yet achieving a rapid reverse of superwettability is still technically challenging on different metals. Here we show that rapid transition between superhydrophobicity (SHB) and superhydrophilicity (SHL) within tens of minutes can be achieved on femtosecond laser-treated Al and Ti surfaces with the assistance of ultraviolet (UV) irradiation and direct-current (DC) sputtering. The extremely high wettability conversion rate on metal surfaces was found to be related to the formation of textured amorphous metal oxides, whose relative content of oxygen vacancies (OVs) could be altered by UV irradiation and DC sputtering. Our findings provide a versatile approach for designing metal surfaces with rapidly reversible superwettability, enabling various applications such as oil-water separations and the controlled release of hydrophilic drugs. © 2024, The Authors. All rights reserved.

关键词： Femtosecond lasers

Room-temperature hydrolysis cleavage of carbon disulfide over a palladium (II)-functionalized Polyarylether

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Molecular Catalysis 2025年 583卷

作者： Xing yu Chen Ling Song Qing Huang Xuan-feng Jiang Key Laboratory of Green Preparation and Application for Functional Materials Ministry of Education Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry Hubei Key Laboratory of Polymer Science School of Materials Science and Engineering Hubei University Wuhan Hubei 430062 PR China

The development of low-energy catalysts is crucial for addressing the challenge of removing carbon disulfide contamination. This study presents a Pd(II)-anchored polyarylether where numerous nitrogen atoms coordinate with palladium nitrate. The catalyst demonstrated remarkable activity against carbon disulfide at room temperature. Furthermore, the integration of chemically stable polymers and sacrificial agents enhanced the catalyst's renewability. By synthesizing both experimental and theoretical results, we proposed a reaction pathway whereby hydroxyl nucleophiles attacked the C = S bonds, leading to the formation of carbon dioxide. This research offered significant insights into the pivotal role of immobilized palladium in the hydrolysis of carbon disulfide and underscored the potential of polymers in purifying water from contaminants.

关键词： Carbon disulfide Catalytic mechanism Heterogeneous catalysis Hydrolytic cleavage Palladium(II) anchoring