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Chinese Journal of polymer science 2024年第8期42卷 1185-1197页

作者： Zhi-Ying zhao Hao jiang Xiao-Dong Li Xu-Dong Zhang Xing Su Mei-Shuai Zou School of materials science and Engineering Beijing Institute of TechnologyBeijing 100081China

The packaging materials with cushioning performance are used to prevent the internal contents from being damaged by the impact and vibration of external *** polyurethane microcellular elastomers(PUMEs)can absorb energy through cell collapse and molecular chain *** this study,PUMEs with different densities were investigated by scanning electron microscopy,dynamic mechanical analysis and dynamic compression *** exhibited significant im pact resistance and the maximum peak stress attenuation ratio reached 73.33%.The protective equipment was made by PUME with the optimal density of 600 kg/m^(3),and then the acceleration sensing device installed with the same protective equipment fell from a height of 3,5 and 10 m to evaluate the energy-absorbing property and reusability of *** results showed that PUMEs equipment reduced the peak acceleration of the device by 93.84%,with a maximum deviation of 9%between actual test and simulation,and shortened the impact time of first landing by 57.39%.In addition,the equipment PUMEs equipment could effectively reduce the stress on the protected items.

关键词： Polyurethane microcellular elastomer Impact velocity Stress attenuation ratio Impact resistance

Modulating oxygen vacancy concentration for selective growth of semiconducting single-walled carbon nanotubes with narrow diameters

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Journal of materials science & Technology 2024年第7期174卷 44-54页

作者： Lei Yang Tingkai zhao Abdul Jalil Huijun Luo Tao jiang Yuan Shu Yazhou Yin Weiyu Jia NPU-NCP joint International Research Center on Advanced Nanomaterials&Defects Engineering Shaanxi Engineering Laboratory for Graphene New Carbon Materials and ApplicationsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Department of Physics Allama Iqbal Open University IslamabadPakistan

Semiconducting single-walled carbon nanotubes(s-SWCNTs)with narrow diameters are promising for future applications in many fields,especially in nanoelectronics and *** this study,the oxygen vacancy concentration modulating strategy was utilized for growing narrow diameters s-SWCNTs by the chemical vapor deposition(CVD)*** Fe_(0.01)Mg_(0.99)O solid solution based catalyst was syn-thesized to anchor the Fe particles and inhibit aggregation for growing SWCNTs with uniform ***_(2)was introduced into the catalyst to provide oxygen vacancies through H_(2)*** oxygen vacancies could form an oxidative environment during the growth of SWCNTs,and the chemically active metallic carbon nanotube caps are selectively etched away under this *** Fe/Ce molar ratio and H2 prereduction time were optimized to modulate the oxygen vacancy ***,us-ing the Fe_(0.01)Mg_(0.99)O/CeO_(2)(3)catalyst with 10 min of H_(2)prereduction time,high purity s-SWCNTs with diameters ranging from 1.41 to 1.71 nm and a content of 95.1%were obtained with high selectivity and carbon yield(1.33 wt%).The mechanism behind this phenomenon was elucidated through experimental characterizations and first-principle simulations,further expanding the understanding of the growth of s-SWCNTs through the modulation of oxygen vacancy concentration.

关键词： Semiconducting single-walled carbon nanotubes Oxygen vacancy concentration Fe_(0.01)Mg_(0.99)O/CeO_(2)catalyst

Lignin‐derived carbon with pyridine N‐B doping and a nanosandwich structure for high and stable lithium storage

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Carbon Energy 2024年第8期6卷 232-247页

作者： Dichao Wu Jiayuan Li Yuying zhao Ao Wang Gaoyue Zhang Jianchun jiang Mengmeng Fan Kang Sun Key Lab of Biomass Energy and Material Jiangsu ProvinceNational Engineering Lab for Biomass Chemical UtilizationKey and Open Lab on Forest Chemical EngineeringSFAInstitute of Chemical Industry of Forest ProductsChinese Academy of ForestryNanjingChina jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjingChina School of Energy and Environment Southeast UniversityNanjingChina Department of Chemistry Tsinghua UniversityBeijingChina Fujian Provincial Key laboratory of Biomass Low‐Carbon Conversion Academy of Advanced Carbon Conversion TechnologyHuaqiao UniversityXiamenChina Chinese Academy of sciences Xinjiang Lihua Institute of Technology UrumqiChina

Biomass‐derived carbon is a promising electrode material in energy storage ***,how to improve its low capacity and stability,and slow diffusion kinetics during lithium storage remains a *** this research,we propose a“self‐assembly‐template”method to prepare B,N codoped porous carbon(BN‐C)with a nanosandwich structure and abundant pyridinic N‐B *** nanosandwich structure can increase powder density and cycle stability by constructing a stable solid electrolyte interphase film,shortening the Li^(+)diffusion pathway,and accommodating volume expansion during repeated charging/*** abundant pyridinic N‐B species can simultaneously promote the adsorption/desorption of Li^(+)/PF_(6)^(−)and reduce the diffusion *** BN‐C electrode showed a high lithium‐ion storage capacity of above 1140 mAh g^(−1)at 0.05 A g^(−1)and superior stability(96.5%retained after 2000 cycles).Moreover,owing to the synergistic effect of the nanosandwich structure and pyridinic N‐B species,the assembled symmetrical BN‐C//BN‐C full cell shows a high energy density of 234.7Wh kg^(−1),high power density of 39.38 kW kg−1,and excellent cycling stability,superior to most of the other cells reported in the *** the density functional theory simulation demonstrated,pyridinic N‐B shows enhanced adsorption activity for Li^(+)and PF_(6)^(−),which promotes an increase in the capacity of the anode and cathode,***,the relatively lower diffusion barrier of pyridinic N‐B promotes Li^(+)migration,resulting in good rate ***,this study provides a new approach for the synergistic modulation of a nanostructure and an active site simultaneously to fabricate the carbon electrode material in energy storage devices.

关键词： high cycling stability high energy density lithium‐ion batteries pyridinic N‐B species sandwich structure carbon nanosheet

Structural Properties of Ions and Polyelectrolytes in Aqueous Solutions under External Electric Fields:The Sign Effect

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Chinese Journal of polymer science 2024年第9期42卷 1341-1352,I0007页

作者： Cheng-jiang Lin Jun-Jun Wang Yuan jiang Shu-Li Chen Hong-Fei Li Wen-Han zhao Qing-Rong Huang Chang-Ru Rong Xiao-Zheng Duan State Key laboratory of polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026China National Key laboratory of Advanced Vehicle Integration and Control China FAW Group Co.Ltd.Changchun130013China State Key laboratory of Molecular Engineering of polymers Department of Macromolecular ScienceFudan UniversityShanghai200438China Department of Food science Rutgers University65 Dudley RoadNew BrunswickNew Jersey08901USA

We utilize molecular dynamics simulations to investigate the microstructures of ions and polyelectrolytes in aqueous solutions under external electric *** focusing on the multi-body interactions between ionic components and H_(2)O molecules,as well as their responses to the external electric fields,we clarify several nontrivial molecular features of the ionic and polyelectrolyte solutions,such as the solvations of cations and anions,clustering of the ions,and dispersions/aggregations of polyelectrolyte chains,as well as the corresponding responses of H_(2)O molecules in these *** simulations illustrate the variations in structures of ionic solutions caused by reversing the charge sign of the ions,and elucidate the disparity in structures between anionic and cationic polyelectrolyte solutions in the presence of the external electric *** work clarifies the mechanism for the alternations in complex multi-body interactions in aqueous solutions caused by the application electric field,which can contribute to the fundamental understanding of the physical and chemical natures of ion-containing and charged polymeric systems.

关键词： Polyelectrolyte Ions Aqueous solutions External electric fields Asymmetric dipole

Generating electron spin qubit in metal-organic frameworks via spontaneous hydrolysis

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Chinese Chemical Letters 2024年第7期35卷 529-533页

作者： Xian-Fa jiang Chongyun Shao Zhongwen Ouyang zhao-Bo Hu Zhenxing Wang You Song State Key laboratory of Coordination Chemistry School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Wuhan National High Magnetic Field Center&School of Physics Huazhong University of Science and TechnologyWuhan 430074China Chaotic Matter science Research Center Faculty of Materials Metallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800China jiangxi Provincial Key laboratory of Functional Molecular materials Chemistry Jiangxi University of Science and TechnologyGanzhou 341000China

Qubit,as the basic unit of quantum operations,has at least two quantum states for *** itself has no superimposable quantum states,but after injecting N atoms,the resulted nitrogenvacancy centers form excellent-performance *** the same purpose,we can also obtain qubits by modifying the matrix without effective quantum ***-1({Cu_(3)(BTC)_(2)(H_(2)O)_(3)},BTC=1,3,5-benzene-tricarboxylate)with S=0 ground state is electron paramagnetic resonance(EPR)silent,so it is not a qubit ***,the spontaneously hydrolyzed HKUST-1 produces dilute uncoupled Cu^(Ⅱ)ions with S=1/*** this paper,we utilized the hydrolysis products of HKUST-1 to obtain qubits and assembled a core-shell structural HKUST-1@ZIF-8 by ZIF-8({Zn(mim)_(2)},mim=2-methylimidazole)coated over HKUST-1 for controlling the *** experimental results clearly show that the qubits come from hydrolyzed Cu^(Ⅱ)***,the dilute uncoupled Cu^(Ⅱ)ions in this assembly can effectively reduce the decoherence of *** EPR studies show that the T_(2) of this compound is 1067 ns at 10 K.

关键词： Hydrolysis Qubit Decoherent times Metal-organic framework Core-shell structure

Effect of Artificial Cooling Extrusion on Microstructure and Mechanical Properties of Mg–Zn–Y Alloys

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Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1115-1127页

作者： Qi-Yu Liao Da-Zhi zhao Qi-Chi Le Wen-Xin Hu Yan-Chao jiang Wei-Yang Zhou Liang Ren Dan-Dan Li zhao-Yang Yin School of materials science and Engineering Northeastern UniversityShenyang110819China Key laboratory of Electromagnetic Processing of materials Ministry of EducationNortheastern UniversityShenyang110819China Key laboratory of Lightweight Structural materials Liaoning ProvinceNortheastern UniversityShenyang110819China Baotou Research Institute of Rare Earths Baotou014000China

Microstructure and mechanical properties of Mg–Zn–Y alloys with different Zn/Y atomic ratios with or without artificial cooling (AC) extrusion were systematically investigated in this work. The results show that bimodal microstructure consisting of submicron dynamic recrystallized (DRXed) grains with high fraction of low-angle grain boundaries (LAGBs) and elongated unDRXed grains was formed in Mg_(98.7)Zn_(1)Y_(0.3) alloy with AC extrusion. The AC process effectively limits the growth of precipitated phases, and large amount of nanoscale precipitates were dynamically precipitated during the extrusion process. AC extrusion could effectually refine the lamellar 14H LPSO phases and inhibit the transition from stacking faults to LSPO phases in Mg_(98)Zn_(1)Y_(1) alloy and the narrow LPSO phase in Mg_(98)Zn_(1)Y_(1)-AC alloy which could promote the nucleation of DRXed grains. The AC extrusion significantly improves the strength of Mg–Zn–Y alloys. Owing to AC extrusion, the strength improvement of Mg_(98.7)Zn_(1)Y_(0.3) alloy is mainly attributed to fine grain strengthening, dislocation strengthening, and nano-phases precipitation strengthening. After AC process, more fine grains and nano-phases jointly strengthen the Mg_(98)Zn_(1)Y_(1) alloy. The Mg_(98)Zn_(1)Y_(1) alloy obtains optimal mechanical properties after extrusion at 623 K, with ultimate tensile strength (UTS) of 406 MPa, yield strength (YS) of 388 MPa, and elongation (EL) of 5.6%.

关键词： Mg-Zn-Y Artificial cooling Extrusion Microstructure Mechanical properties

A review on surface coating strategies for anti-hygroscopic of high energy oxidizer ammonium dinitramide

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Defence Technology（防务技术） 2024年第3期33卷 237-269页

作者： Hongyu Yang Fuyao Chen Yiwen Hu Qiangqiang Lu Lei Xiao Yinglei Wang Fengqi zhao Wei jiang Gazi Hao National Special Superfine Powder Engineering Research Center of China School of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094China Xi’an Modern Chemistry Research Institute Xi’an 710065China

Ammonium dinitramide(ADN),which has the advantages of high energy density,no halogen and low characteristic signal,is not only considered as a new high-energy oxidizer that is expected to replace the traditional oxidizer ammonium perchlorate(AP)in solid propellants,but also a good performance explosive in ***,due to the strong hygroscopicity of ADN,its application in solid propellants and explosives is greatly *** the hygroscopicity of ADN is the key to realize the wide application of *** this paper,we systematically review the research progress of anti-hygroscopic strategies of ADN *** surface coating methods are focusing on solvent volatilization,solvent-non-solvent,melt crystallization and atomic layer deposition *** characteristics of the different methods are compared and analyzed,and the basis for the classification and selection of the coating materials are introduced in *** addition,the feasibility of material for surface coating of ADN is evaluated by several compatibility analysis *** is highly expected that the liquid phase method(solvent volatilization method,solvent-non-solvent method)would be the promising method for future ADN coating because of its effective,safety and facile ***,polymer materials,are the preferred coating materials due to their high viscosity,easy adhesion,good anti-hygroscopic effect,and heat resistance,which make ADN weak hygroscopicity,less sensitive,easier to preserve and good compatibility.

关键词： Ammonium dinitramide(ADN) Energetic materials Anti-hygroscopic Surface coating Compatibility analysis

Comprehensive understanding of the thriving electrocatalytic nitrate/nitrite reduction to ammonia under ambient conditions

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Journal of Energy Chemistry 2024年第5期92卷 459-483页

作者： Xinying zhao Yuzhuo jiang Mengfan Wang Yunfei Huan Qiyang Cheng Yanzheng He Tao Qian Chenglin Yan Collaborative Innovation Center of Suzhou Nano science and Technology College of EnergySoochow UniversitySuzhou 215006JiangsuChina School of Chemistry and Chemical Engineering Nantong UniversityNantong 226019JiangsuChina School of Petrochemical Engineering Changzhou UniversityChangzhou 213164JiangsuChina

Ammonia(NH_(3))is a multifunctional compound that is an important feedstock for the agricultural and pharmaceutical industries and attractive energy storage *** present,NH_(3)synthesis is highly dependent on the conventional Haber–Bosch process that operates under harsh conditions,which consumes large quantities of fossil fuels and releases a large amount of carbon *** an alternative,electrosynthesis is a prospective method for producing NH_(3)under normal temperature and pressure *** electrocatalytic nitrogen reduction to ammonia has attracted considerable attentions,the low solubility of N_(2)and high N≡N cracking energy render the achievements of high NH_(3) yield rate and Faradaic efficiency *** and nitrite(NO_(x)^(-))are common N-containing *** to their high solubilities and low dissociation energy of N=O,NO_(x)^(-)−are ideal raw materials for NH_(3) ***,electrocatalytic NO_(x)^(-)−reduction to NH_(3)(eNO_(x)RR)is a prospective strategy to simultaneously realise environmental protection and NH_(3) *** review offers a comprehensive understanding of the thriving eNO_(x)RR under ambient *** first,the popular theory and mechanism of eNO_(x)RR and a summary of the measurement system and evaluation criteria are ***,various strategies for developing NO_(x)−reduction catalysts are systematically presented and ***,the challenges and possible prospects of electrocatalytic NO_(x)^(-1) reduction are outlined to facilitate energy-saving and environmentally friendly large-scale synthesis of NH_(3) in the future.

关键词： Electrocatalytic nitrate reduction Electrocatalytic nitrite reduction Ammonia synthesis Pollutant removal Electrosynthesis

Ultraviolet‑Irradiated All‑Organic Nanocomposites with polymer Dots for High‑Temperature Capacitive Energy Storage

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Nano-Micro Letters 2024年第3期16卷 398-406页

作者： Jiale Ding Yao Zhou Wenhan Xu Fan Yang Danying zhao Yunhe Zhang Zhenhua jiang Qing Wang College of Chemistry Jilin UniversityChangchun 130012People’s Republic of China Department of materials science and Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USAs Deutsches Elektronen-Synchrotron DESY Notkestr.8522607 HamburgGermany

polymer dielectrics capable of operating efficiently at high electric fields and elevated temperatures are urgently demanded by next-generation electronics and electrical power *** inorganic fillers have been extensively utilized to improved high-temperature capacitive performance of dielectric polymers,the presence of thermodynamically incompatible organic and inorganic components may lead to concern about the long-term stability and also complicate film ***,zero-dimensional polymer dots with high electron affinity are introduced into photoactive allyl-containing poly(aryl ether sulfone)to form the all-organic polymer composites for hightemperature capacitive energy *** ultraviolet irradiation,the crosslinked polymer composites with polymer dots are efficient in suppressing electrical conduction at high electric fields and elevated temperatures,which significantly reduces the high-field energy loss of the composites at 200℃.Accordingly,the ultraviolet-irradiated composite film exhibits a discharged energy density of 4.2 J cm^(−3)at 200℃.Along with outstanding cyclic stability of capacitive performance at 200℃,this work provides a promising class of dielectric materials for robust high-performance all-organic dielectric nanocomposites.

关键词： High-temperature energy storage polymer dots Ultraviolet irradiation All-organic composite dielectrics

Rare loss-of-function variants in FLNB cause non-syndromic orofacial clefts

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Journal of Genetics and Genomics 2024年第2期51卷 222-229页

作者： Wenbin Huang Shiying Zhang Jiuxiang Lin Yi Ding Nan jiang Jieni Zhang Huaxiang zhao Feng Chen Department of Orthodontics Peking University School and Hospital of StomatologyBeijing100081China Key laboratory of Shaanxi Province for Craniofacial Precision Medicine Research College of StomatologyXi’an Jiaotong UniversityXi’anShaanxi710004China Guangdong Provincial High-level Clinical Key Specialty Guangdong Province Engineering Research Center of Oral Disease Diagnosis and TreatmentDepartment of OrthodonticsStomatological CenterPeking University Shenzhen HospitalShenzhen Peking University-The Hong Kong University of Science and Technology Medical CenterShenzhenGuangdong 518036China Department of Physiology and Pathophysiology School of Basic Medical SciencesXi'an Jiaotong UniversityXi'anShaanxi710049China National Center for Stomatology National Clinical Research Center for Oral DiseasesNational Engineering Laboratory for Digital and Material Technology of StomatologyBeijing Key Laboratory for Digital StomatologyResearch Center of Engineering and Technology for Computerized Dentistry Ministry of HealthNMPA Key Laboratory for Dental MaterialsBeijing100101China Central laboratory Peking University School and Hospital of StomatologyBeijing100081China

Orofacial clefts (OFCs) are the most common congenital craniofacial disorders, of which the etiology is closely related to rare coding variants. Filamin B (FLNB) is an actin-binding protein implicated in bone formation. FLNB mutations have been identified in several types of syndromic OFCs and previous studies suggest a role of FLNB in the onset of non-syndromic OFCs (NSOFCs). Here, we report two rare heterozygous variants (p.P441T and p.G565R) in FLNB in two unrelated hereditary families with NSOFCs. Bioinformatics analysis suggests that both variants may disrupt the function of FLNB. In mammalian cells, p.P441T and p.G565R variants are less potent to induce cell stretches than wild type FLNB, suggesting that they are loss-of-function mutations. Immunohistochemistry analysis demonstrates that FLNB is abundantly expressed during palatal development. Importantly, Flnb^(−/−) embryos display cleft palates and previously defined skeletal defects. Taken together, our findings reveal that FLNB is required for development of palates in mice and FLNB is a bona fide causal gene for NSOFCs in humans.

关键词： Or ofacial clefts FLNB Loss-of-function mutati on Cleft palate Filamin B Actin flannent Knockout mouse