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Cu(0) Wire-mediated Single-electron Transfer-living Radical Polymerization of Oligo(ethylene oxide) Methyl Ether Acrylate by Selecting the Optimal Reaction Conditions

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Chinese Journal of Polymer Science 2019年第11期37卷 1130-1141页

作者： Liang Ding Juan Li Rui-Yu Jiang Ling-Fang Wang Wei Song Lei Zhu Department of Polymer and Composite Material School of Materials Engineering Yancheng Institute of Technology Yancheng 224051 China Roy & Diana Vagelos Laboratories Department of Chemistry University of Pennsylvania Philadelphia PA 19104-6323 USA Jiangsu collaborative innovation center for Ecological Building Material and Environmental Protection Equipments Yancheng Institute of Technology Yancheng 224051 China School of Chemistry and Materials Science Hubei Engineering University Hubei Collaborative Innovation Center of Conversion and Utilization for Biomass Resources Xiaogan 432000 China

The efficient Cu(0) wire-catalyzed single-electron transfer-living radical polymerization (SET-LRP) in organic solvents and mixtures of the organic solvents with water has been thoroughly investigated. 01igo(ethylene oxide) methyl ether acrylate was used as an exemplar oligomer monomer to determine the optimum polymerization conditions for rapid, controlled, and quantitative production of well-defined polymers. The effects of Cu(0)-wire length (12.5 or 4.5 cm), ligand type (tris(dimethylaminoethyl)amine, Me6-TREN, or tris(2-aminoethyl)amine, TREN), and solvent type (dipolar aprotic solvents, cyclic ethers, alcohol, or acetone) on the polymerization have been evaluated. Kinetic experiments were performed for all polymerizations to assess the "living" behavior of each system employed. Importantly, TREN could be used as a replacement for Me6-TREN in Cu(0) wire-catalyzed SET-LRP of oligomer monomer, which probably provides the most economical and efficient methodology since TREN is 80 times less expensive than Me6-TREN. The high chain-end fidelity of resulting polymer was experimentally verified by thiol-Michael addition reaction at the a-Br chain end and subsequent chain extension with methyl acrylate.

关键词： Single-electron transfer-living radical polymerization Oligo(ethylene oxide) methyl ether acrylate Kinetics of polymerization Modification

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Life cycle assessment of HFC-134a production by calcium carbide acetylene route in China

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Chinese Journal of Chemical Engineering 2022年第2期35卷 236-244页

作者： Suisui Zhang Jingying Li Yan Nie Luyao Qiang Boyang Bai Zhiwei Peng Xiaoxun Ma School of Chemical Engineering Northwest UniversityXi’an 710069China Chemical Engineering Research center of the Ministry of Education(MOE)for Advanced Use Technology of Shanbei Energy Xi’an 710069China Shaanxi Research center of Engineering Technology for Clean coal Conversion Xi’an 710069China collaborative innovation center for Development of Energy and Chemical Industry in Northern Shaanxi Xi’an 710069China International Scientific and Technological Cooperation Base of the Ministry of Science and Technology(MOST)for Clean utilization of Hydrocarbon Resources Xi’an 710069China

HFC-134a is a widely used environment-friendly *** present,China is the largest producer of HFC-134a in the *** production of HFC-134a in China mainly adopts the calcium carbide acetylene ***,the production route has high resource and energy consumption and large waste emission,and few of the studies addressed on the environmental performance of its production *** study quantified the environmental performance of HFC-134a production by calcium carbide route via carrying out a life cycle assessment(LCA)using the CML 2001 *** uncertainty analysis by Monte-Carlo simulation was also carried *** results showed that electricity had the most impact on the environment,followed by steam,hydrogen fluoride and chlorine,and the impact of direct CO_(2) emissions in calcium carbide production stage on the global warming effect also could not be ***,the clean energy(e.g.,wind,solar,biomass,and natural gas)was used to replace coal-based electricity and coal-fired steam in this study,showing considerable environmental *** the same time,the use of advanced production technologies could also improve environmental benefits,and the environmental impact of the global warming category could be reduced by 4.1%via using CO_(2) capture and purification *** Chinese database of HFC-134a production established in this study provides convenience for the relevant study of *** the production of HFC-134a,this study helps to better identify the specific environmental hotspots and proposes useful ways to improve the environmental benefits.

关键词： HFC-134a Calcium carbide Life cycle assessment Environmental impact Carbon capture

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A Dynamic Bandwidth Allocation Solution Based on User Behavior and Software Defined EPS

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China Communications 2016年第9期13卷 80-90页

作者： Bo Zhu Hao Jiang Lihua Wu Shuwen Yi Hai Wang School of Electronic Information Wuhan UniversityWuhan430072China collaborative innovation center for Geospatial Technology Wuhan430079China

For telecommunication operators, how to improve the utilization of bandwidth resources is always a problem which worthy of study, nowadays, this issue has become more and more important, since the traffic load bursting in the mobile Internet. So the key to solving this problem is that we need to find a kind of traffic model to predict the traffic load that users need. According to the predicted traffic load to allocate bandwidth to each base station *** the traffic consumption behavior of a single base station is random, it is difficult to predict[ 1 ]. For this reason, we based on reality that, when the user moves, it may get traffic load from different base stations, therefore, there will have some kind of relationship between those base *** use this relationship to establish a kind of Spatial collaborative ***, we make use of stability algorithm to divided those base station cluster into different communities, According to the traffic load usage rules which these communities indicated to us, we get a traffic *** the same time, we studied bow to use this traffic model in the future networks to dynamically allocate bandwidth resources, then we propose a new kind of EPS architecture based on SDN, on this platform, we can deploy our strategy through it＇s programmable ***, we designed an experiment to test the performance of our dynamic strategy, and the result shows that our method enables bandwidth utilization has been greatly improved.

关键词： bandwidth utilization user's behaviour traffic module SDN

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Temporal variation of PM_(2.5)-associated health effects in Shijiazhuang,Hebei

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Frontiers of Environmental Science & Engineering 2021年第5期15卷 75-83页

作者： Aifang Gao Junyi Wang Jianfei Luo Aiguo Li Kaiyu Chen Pengfei Wang Yiyi Wang Jingyi Li Jianlin Hu Hongliang Zhang School of Water Resources and Environment Hebei GEO UniversityShijiazhuang050031China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologyNanjing University of Information Science&TechnologyNanjing210044China Hebei Province collaborative innovation center for Sustainable utilization of Water Resources and Optimization of Industrial Structure Hebei Province Key Laboratory of Sustained Utilization and Development of Water ResourcesShijiazhuang050031China Department of Civil and Environmental Engineering Louisiana State UniversityBaton RougeLA70803USA Department of Environmental Science and Engineering Fudan UniversityShanghai200438China

Shijiazhuang is one of the cities in the North China *** recent decades,this city has experienced high levels of fine particulate matter(PM_(2.5)),which have potentially significant effects on human *** this study,the health effects of PM_(2.5)exposure in Shijiazhuang were estimated by applying an integrated exposure-response *** mortality,years of life lost(YLL),and the mortality benefits linked to reduced levels of PM_(2.5)were quantified for the period 2015–*** 2015,2016,and 2017,cerebrovascular diseases caused the highest premature mortality(2432,2449,and 2483,respectively),followed by ischemic heart diseases(1391,1479,and 1493,respectively),lung cancer(639,660,and 639,respectively),and chronic obstructive pulmonary diseases(533,519,and 473,respectively).Notably,the total number of premature deaths caused by PM_(2.5)exposure in Shijiazhuang in 2015,2016,and 2017 were 4994,5107,and 5088,***,the YLL in the same years were 47001,47880 and 47381,***,the YLL per 1000 females was lower than that per 1000 ***,we noted that premature mortality and YLL decreased by 84.2%and 84.6%when the PM_(2.5)levels diminished to 10µg/m^(3).Overall,the results of this study improve our understanding of how high PM_(2.5)concentrations affect human health and suggest the application of more stringent measures in Shijiazhuang to alleviate the associated health risks.

关键词： PM_(2.5) Health effects Integrated exposure-response model Shijiazhuang

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Genetic analysis of the “head top shape” quality trait of Chinese cabbage and its association with rosette leaf variation

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Horticulture Research 2021年第1期8卷 1374-1385页

作者： Xiaoxue Sun Ying Gao Yin Lu Xiaomeng Zhang Shuangxia Luo Xing Li Mengyang Liu Daling Feng Aixia Gu Xueping Chen Shuxin Xuan Yanhua Wang Shuxing Shen Guusje Bonnema Jianjun Zhao State Key Laboratory of North China Crop Improvement and Regulation Key Laboratory of Vegetable Germplasm Innovation and Utilization of HebeiCollaborative Innovation Center of Vegetable Industry in HebeiCollege of HorticultureHebei Agricultural University071000 BaodingChina Plant Breeding Wageningen University and ResearchWageningenThe Netherlands

The agricultural and consumer quality of Chinese cabbage is determined by its *** shape is defined by the folding of the heading leaves,which defines the head top shape(HTS).The overlapping HTS,in which the heading leaves curve inward and overlap at the top,is the shape preferred by *** understand the genetic regulation of HTS,we generated a large segregating F 2 population from a cross between pak choi and Chinese cabbage,with phenotypes ranging from nonheading to heading with either outward curving or inward curving overlapping heading *** was correlated with plant height,outer/rosette leaf length,and petiole length.A high-density genetic map was *** trait locus(QTL)analysis resulted in the identification of 22 QTLs for leafy head-related traits,which included five HTS *** segregant analysis(BSA)was used to confirm HTS QTLs and identify candidate genes based on informative single-nucleotide ***,the HTS QTLs colocalized with QTLs for plant height,outer/rosette leaf,and petiole length,consistent with the observed phenotypic *** QTL analysis and BSA laid a foundation for molecular marker-assisted breeding of Chinese cabbage HTS and directions for further research on the genetic regulation of this trait.

关键词： heading trait breeding

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A generic approach yields organic solar cells with enhanced efficiency and thermal stability

Aggregate

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Aggregate 2023年第2期4卷 318-328页

作者： Mengyuan Gao Kai Zhang Chunyong He Hanqiu Jiang Xiong Li Qingchun Qi Kangkang Zhou Yu Chen Wenchao Zhao Long Ye School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin UniversityCollaborative Innovation Center of Chemical Science and Engineering(Tianjin)TianjinChina Spallation Neutron Source Science center DongguanChina Institute of high Energy Physics Chinese Academy of Sciences(CAS)BeijingChina Mettler Toledo ShanghaiChina Co-innovation center of Efficient Processing and utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjingChina

The use of deuterium are critical for promoting the fundamental understanding of aggregate materials and their new ***,the solution structure of conjugated polymers can be hardly resolved without ***,studies about the isotopic effects of casting solvents on the aggregated structures of photovoltaic polymers and their bulk-heterojunction blends are ***,the impact of deuterated solvents on the thermal behavior,aggregated structures,and device performance of photovoltaic polymers is clearly delineated for the first time by multiple *** enhanced π-π stacking order of photovoltaic polymers is highly relevant to their relatively poor miscibility with deuterated *** from higher crystallinity and optimized morphology of deuterated solvents processed films,the devices are able to achieve better efficiency and notable improvement in thermal *** results highlight the isotopic effects of solvents on the aggregated structure of conjugated polymer systems and reveal the potential of innovative approaches to fabricate thermally stable high-efficiency solar cells.

关键词： deuterated solvent organic solar cells phase separation scattering thermal stability

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Research progress of composite cathode materials for Solid oxide fuel cells

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Progress in Natural Science:Materials International 2023年第3期33卷 267-278页

作者： Qunyang Long Rui Sha Ruohang Wang Bo Xu Haichao Men Qi Wang Jie Hou Engineering Research center of Ministry of Education for Geological Carbon Storage and Low Carbon utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences School of Resource Environment and Safety Engineering University of South China

Solid oxide fuel cell(SOFC) is a device that converts the chemical energy of hydrogen or hydrocarbons and oxygen into electric energy through electrochemical reaction, with high efficiency and low emissions. Cathode materials with high electrochemical catalytic activity, stability and medium-low temperature durability continue to play a crucial role in SOFC. However, single-phase cathode materials suffer from low conductivity, low activity and poor thermal matching. Therefore, various composite technologies have been employed to enhance the performance of SOFC cathodes. In this review, various composite methods have been illustrated including mechanical-physical composite, infiltration composite and in-situ composite. Besides, this article provides an overview of the fundamentals, recent advances, advantages, disadvantages, challenges, and prospects of these composite methods. Furthermore, this article provides valuable guidance and potential directions for the development of composite cathode materials.

关键词： SOFC Composite cathode materials Composite methods Mechanical-physical composite Infiltration composite In-situ composite

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Solid-conversion synthesis of three-dimensionally ordered mesoporous ZSM-5 catalysts for the methanol-to-propylene reaction

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Frontiers of Chemical Science and Engineering 2024年第8期18卷 111-122页

作者： Weilong Chun Chenbiao Yang Xu Wang Xin Yang Huiyong Chen School of Chemical Engineering Northwest UniversityXi’an 710069China International Science&Technology Cooperation Base for Clean utilization of Hydrocarbon Resources Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei EnergyCollaborative Innovation Center for Development of Energy and Chemical Industry in Northern ShaanxiNorthwest UniversityXi’an 710069China

A facile synthesis of hierarchical ZSM-5 with the three-dimensionally ordered mesoporosity(3DOm ZSM-5)was achieved by solid conversion(SC)of SiO_(2)colloidal crystals to high-crystalline *** products of 3DZ5_S/C and 3DZ5_S,which were severally transformed from the carbon-padded SiO_(2)colloidal crystals and the initial SiO_(2)colloidal crystals,exhibited not only a similar ordered structure and acidity but also higher crystallinity and more balanced meso-/micropore combination in comparison with 3DZ5_C obtained by the conventional confined space crystallization *** three synthesized 3DZ5 catalysts showed improved methanol-to-propylene performance than the commercially microporous ZSM-5(CZ5),embodied in five times longer lifetime,higher propylene selectivity and S_(propylene)/S_(ethylene) ratio(P/E),and superior coke toleration with lower formation rate of coke(R_(coke)).Moreover,the 3DZ5_S catalyst in situ converted from SiO_(2)colloidal crystals presented the highest selectivities of propylene(42.51%)and light olefins(74.6%)among all three 3DZ5 *** high efficiency in synthesis and in situ utilization of SiO_(2)colloidal crystals demonstrate the proposed SC strategy to be more efficiently and eco-friendly for the high-yield production of not only 3DOm ZSM-5 but also other types of hierarchical zeolites.

关键词： hierarchical zeolite three-dimensionally ordered mesoporosity ZSM-5 solid conversion methanol-to-propylene

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Manipulating metal-support interactions of metal catalysts for Fischer-Tropsch synthesis

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Chinese Journal of Chemical Engineering 2021年第7期34卷 220-230页

作者： Qingpeng Cheng Yunhao Liu Shuaishuai Lyu Ye Tian Qingxiang Ma Xingang Li collaborative innovation center of Chemical Science and Engineering(Tianjin) State Key Laboratory of Chemical EngineeringTianjin Key Laboratory of Applied Catalysis Science and TechnologySchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Advanced Membranes and Porous Materials center Physical Sciences and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia State Key Laboratory of high-efficiency coal utilization and Green Chemical Engineering Ningxia UniversityYinchuan 750021China School of Chemical and Biological Engineering Lanzhou Jiaotong UniversityLanzhou 730070China

For supported metal catalyst systems,the impact on catalysis originates from the interaction between metal nanoparticles and their ***-support interactions(MSI)can change electronic properties,geometric morphologies,or chemical compositions of metal nanoparticles to make active sites have specific properties and catalytic ***-Tropsch synthesis(FTS)is one of the most effective ways to convert cheap non-petroleum-based carbon sources into high value-added chemicals or ultraclean liquid *** this review,we summarize and classify the impact of MSI on the catalytic activity,selectivity and stability of FTS *** strategies to tune MSI are introduced in detail,and the recent development of high-efficiency FTS catalysts through the manipulation of SMI strategies has been *** is emphasized that the active metal sites,which are endowed with special functions by MSI,can change the strength of adsorption bond of adsorbates,consequently controlling the product distribution.

关键词： Metal-support interactions Fischer-Tropsch synthesis Modification strategies Activity Selectivity

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Geochronology,Geochemistry and Geological Significance of Volcanic Rocks of the Bangba District,Western Segment of the Central Lhasa Subterrane

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Journal of Earth Science 2022年第3期33卷 681-695页

作者： Yan Cao Zhiqiang Kang Feng Yang Tong Zhou Dongmei Liu Rui Wang State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences(Beijing)Beijing 100083China College of Earth Sciences Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources in GuangxiGuilin University of TechnologyGuilin 541004China

The Lhasa terrane records voluminous magmatism related to the subduction of the Neo-Tethyan oceanic lithosphere,the study of which constrains the tectonomagmatic evolution of the *** report zircon U-Pb ages,whole-rock compositions and Sr-Nd isotopic data from volcanic rocks in the Bangba district within the central Lhasa subterrane to constrain their magmatic source and *** U-Pb dating of two volcanic rock samples yields End Cretaceous ages of 70.0±0.8 and 74.3±1.2 *** rocks have high SiO_(2)(65.41 wt.%-68.45 wt.%),Al_(2)O_(3)(16.16 wt.%-16.59 wt.%)and K_(2)O(5.00 wt.%-6.73 wt.%)contents,and low TFe2O3(2.33 wt.%-2.79 wt.%),MgO(0.64 wt.%-1.44 wt.%)and TiO_(2)(0.61 wt.%-0.65 wt.%)contents,with aluminium saturation indices(A/CNK)of *** major-and trace-element compositions of the rocks show they are metaluminous to slightly peraluminous high-K calc-alkaline *** relatively high SiO2 and Sr-Nd isotopic compositions((^(87)Sr/^(86)Sr)_(i)=0.722654,0.722038 and 0.725787 andε_(Nd)(t)=-12.27,-12.36 and-6.09,respectively)indicate that the trachydacites formed by partial melting of crustal *** trachydacites are relatively enriched in light rare earth elements,depleted in heavy rare earth elements,have high(La/Yb)_(N) and(Gd/Yb)_(N) ratios(>61 and>6,respectively),and low Y(<18 ppm)and Yb(<18 ppm)contents,indicating they most likely formed from partial melting of lower crust in the garnet stability *** the geodynamic setting of the region during this period,partial melting of the ancient Lhasa crust was likely triggered by underplating mafic magmas during rollback of the Neo-Tethyan slab.

关键词： trachydacite zircon U-Pb age geochemistry End Cretaceous Lhasa terrane

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