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Bridging from the Sequence to Architecture: Graft Copolymers engineering via Successive Latent Monomer and Grafting-from Strategies

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Chinese Journal of Chemistry 2021年第5期39卷 1273-1280页

作者： Yajie Zhang Xiaohuan Cao Yang Gao Yujie Xie Zhihao Huang Zhengbiao Zhang Xiulin Zhu State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhouJiangsu 215123China State Key Laboratory of Radiation Medicine and Protection Soochow UniversitySuzhouJiangsu 215123China Global Institute bf Software Technology No.5 Qingshan RoadSuzhou National Hi-Tech DistrictSuzhouJiangsu 215163China

The on-demand building copolymer structures,from sequence to architecture,is crucial in understanding the relation between pol-ymer structure and property,meanwhile motivating the innovation of polymer ***,the challenge is conspicuous for,complicated polymer structures from inherently intricate *** this work,copolymers with tailored grafting density and distributions were achieved using successive latent monomer and grafting-from *** hydroxyl group functionalized fu-ran/maleimide adduct(FMOH)was selected as the latent monomer for RAFT polymerization of an array of copolymers with tailored localization of hydroxyl group along the main *** hydroxyI group further initiated the ring opening polymerization(ROP)of L-lactide or ε-caprolactone,resulting in a library of multicomponent copolymers via grafting-from *** initiating efficiency reached to-100% with variable molecular weight(21300-58600 Da)and narrow distributions(Ð_(M)<1.25),indicating that such graft copolymers possessed controlled density and distribution of side chains as its linear *** investigation on thermal properties of the well-defined graft copolymers implied that the precise tailoring over copolymer structures at the molecule level could lead to tunable chemical/physical *** work bridged polymer from sequence to architecture,unveiled a new meth-od in creating graft copolymers with programmable structures and provided the insight into the structure/property relationship.

关键词： Sequence determination Polymers Latent Monomer Polymerization Maleimide

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Purification of hydrogen as green energy with pressure-vacuum swing adsorption (PVSA) with a two-layers adsorption bed using activated carbon and zeolite as adsorbent

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Chemosphere 2023年第1期338卷 139347页

作者： Xie, Xingyong Awad, Omar I. Xie, Lili Ge, Ziyi National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization Huaiyin Institute of Technology Huaian223003 China Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province Huaiyin Institute of Technology Huaian223003 China Mechanical Engineering Department College of Engineering Gulf University Bahrain Mechanical and Electrical Engineering College Hainan University Haikou570228 China

Today, hydrogen is produced in refineries and petrochemicals using the methane reforming process, followed by a water gas shift reaction stage. The hydrogen produced has a purity of approximately 75%, and is purified further through an adsorption process. In this project, the feasibility of achieving a purity level greater than 90% through the use of a more effective adsorbent and the periodic process of pressure vacuum swing adsorption (PVSA) with a double-layer bed of active carbon and zeolite will be investigated. The design, simulation, and optimization of the hydrogen purification unit will also be conducted. The results of this study indicate that the proposed process can achieve a purity level of up to 97% for the output hydrogen. © 2023

关键词： Activated carbon

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CmERFⅠ-5 and CmERFⅤ-2 affect ethylene synthesis and sucrose accumulation in postharvest oriental melon fruit at low temperature

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Postharvest Biology and technology 2025年 219卷

作者： Yang, Fan Gao, Ge Wang, Cheng Guan, Jingyue Chen, Junqin Qi, Hongyan College of Horticulture Shenyang Agricultural University Shenyang 110866 China Key Laboratory of Protected Horticulture of Education of Ministry and Liaoning Province China National & Local Joint Engineering Research Center of Northern Horticultural Facilities Design & Application Technology Shenyang 110866 China

Postharvest low-temperature storage crucially affects ethylene-dependent fruit ripening and the sucrose accumulation of climacteric melon fruit;however, the molecular mechanism by which ethylene affects sugar content at low temperature remains unclear. Here, ‘High Sucrose’ (‘HS’) melon fruit were harvested at the initial stage of ethylene release (30 d after anthesis, DAA) and treated at different temperature (25 ℃, 10 ℃, and 4 ℃). The results revealed that both low temperature treatments had a lower sucrose content and sucrose percentage while also having a higher starch content, hexose level, vacuolar invertase (VINV) activity, and CmVINV2 expression in the melon fruit. Moreover, the ethylene production and CmACO1 (ACC oxidase 1) expression were lower at low temperature. Both low-temperature treatments positively and negatively regulated the expression of the ethylene response factors CmERFV-2 and CmERFI-5, respectively. We found that CmERFV-2 and CmERFI-5 could positively regulate the promoters of CmVINV2 and CmACO1, respectively. The agrobacterium-mediated transient transformation further verified that CmERFV-2 silencing and CmERFI-5 overexpression resulted in higher sucrose levels and produced more ethylene. In short, postharvest low-temperature treatments promoted CmERFV-2 expression and inhibited CmERFI-5 expression, which activated the transcription of downstream CmVINV2 and CmACO1, respectively, ultimately affecting sugar content and ethylene biosynthesis. The lower production of ethylene at low temperature reduced starch degradation, thereby affecting sugar accumulation in melon fruit. This study explained the cause for the lower sweetness of postharvest oriental melon fruit at low temperature and provided new insights into maintaining flavour quality at low temperature. © 2024 Elsevier B.V.

关键词： CmACO1 CmVINV2 Ripening Sugar content Vacuolar invertase

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Suppressed light-induced phase transition of CsPbBr_(2)I: Strategies, progress and applications in the photovoltaic field

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Journal of Semiconductors 2021年第7期42卷 24-36页

作者： Hushan Zhang Zhiwen Jin School of Physical Science and Technology&Key Laboratory of Special Function Materials and Structure Design(MoE)&National&Local Joint Engineering Laboratory for Optical Conversion Materials and Technology Lanzhou UniversityLanzhou 730000China

The rapid rise in the power conversion efficiency(PCE)of CsPbBr_(2)I-based perovskite solar cells(PSCs),from 4.7%in 2016 to 11.08%in 2020,render it a promising material for use in photovoltaic ***,the phase stability and current hysteresis caused by photo-induced phase segregation in CsPbBr_(2)I represent major obstacles to further improvements in the PCE for such *** this review,we describe the basic structure and optical properties of CsPbBr_(2)I,and systematically elaborate on the mechanism of the phase *** then discuss the strategies in progress to suppress phase transition in CsPbBr_(2)I,and their potential application in the photovoltaic ***,challenges and application prospects for CsPbBr2I PSCs are summarized in the final section of this article.

关键词： perovskite CsPbBr_(2)I stability phase transition phase segregation

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通风竖井位置对高速列车通过地下车站瞬态压力的影响试验

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Journal of Central South University 2023年第7期30卷 2427-2440页

作者：周丹李金柱李晓芳戴小罡刘汉歆梅竹 Key Laboratory of Traffic Safety on Track Ministry of Education(Central South University) Changsha 410009China Joint International Research Laboratory of Key Technology for Rail Traffic Safety(Central South University) Changsha 410009China National&Local Joint Engineering Research Centre of Safety Technology for Rail Car(Central South University) Changsha 410009China Changsha Huanghua International Airport Branch of Hunan Airport Co. Ltd.Changsha 410009China China Railway Siyuan Survey and Design Group Co. Ltd.Wuhan 430063China

当列车快速驶过地下车站时,会产生强烈的瞬态压力波动。本文采用移动模型试验装置研究了列车通过地下车站时列车和屏蔽门表面的瞬态压力分布特征,分析了通风竖井位置对缓解瞬态压力波动的影响。结果表明,不同屏蔽门上对应位置处测点的... 详细信息

当列车快速驶过地下车站时,会产生强烈的瞬态压力波动。本文采用移动模型试验装置研究了列车通过地下车站时列车和屏蔽门表面的瞬态压力分布特征,分析了通风竖井位置对缓解瞬态压力波动的影响。结果表明,不同屏蔽门上对应位置处测点的压力波动值存在差异。通风竖井可以影响压力幅值,不同位置的通风竖井影响特性也有很大差异;位于站台旁边的竖井对缓解列车和屏蔽门表面的瞬态压力幅值效果最好。与没有竖井的车站相比,当竖井设置在站台附近位置时,布置在列车表面上的H2测点的压力幅值减小47.1%,站台屏蔽门表面上的P1测点的压力幅值减小71.3%。

关键词：移动模型试验高速列车地下车站通风竖井压力分布

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Band offsets and electronic properties of the Ga_(2)O_(3)/FTO heterojunction via transfer of free-standing Ga_(2)O_(3) onto FTO/glass

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Chinese Physics B 2021年第11期30卷 385-388页

作者： Xia Wang Wei-Fang Gu Yong-Feng Qiao Zhi-Yong Feng Yue-Hua An Shao-Hui Zhang Zeng Liu Department of Electrical Engineering and Automation Shanxi Institute of TechnologyYangquan 045000China School of Optoelectronic Engineering Guangdong Polytechnic Normal UniversityGuangzhou 510665China Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationCollege of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China College of Electronic and Optical Engineering&College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210023China National and Local Joint Engineering Laboratory for RF Integration and Micro-Packing Technologies Nanjing University of Posts and TelecommunicationsNanjing 210023China

The determination of band offsets is crucial in the optimization of Ga_(2)O_(3)-based devices,since the band alignment types could determine the operations of devices due to the restriction of carrier transport across the heterogeneous *** this work,the band offsets of the Ga_(2)O_(3)/FTO heterojunction are studied using x-ray photoelectron spectroscopy(XPS)based on Kraut’s method,which suggests a staggered type-II alignment with a conduction band offset(DEC)of 1.66 eV and a valence band offset(DEV)of􀀀2.41 ***,the electronic properties of the Ga_(2)O_(3)/FTO heterostructure are also measured,both in the dark and under ultraviolet(UV)illuminated conditions(254 nm UV light).Overall,this work can provide meaningful guidance for the design and construction of oxide hetero-structured devices based on wide-bandgap semiconducting Ga_(2)O_(3).

关键词： Ga_(2)O_(3)/FTO heterojunction band alignment magnetron sputtering free-standing

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The design of Appropriate Si Content Overcomes the Strength-Ductility Trade-Off in Dual-Phase High Entropy Alloy

SSRN

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SSRN 2024年

作者： Wang, L.X. Xiang, Song Tan, Y.B. Shi, W. Liu, F. Cai, Y.Q. Ji, X.M. Guizhou Key Laboratory of Materials Mechanical Behavior and Microstructure College of Materials and Metallurgy Guizhou University Guiyang550025 China National & Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology Guizhou University Guiyang550025 China School of Mechanical and Electrical Engineering Guizhou Normal University Guiyang550025 China

To reduce the stacking fault energy (SFE) of the alloys, silicon (Si) was introduced into Fe40Mn35Co20Cr5 dual-phase high entropy alloys (HEAs). We propose a novel mechanism supported by first-principles calculations that predicts Si atoms may preferentially substitute Cr atoms, resulting in enhanced lattice distortion and reduced SFE. Experimental results indicate that incorporating 0.2 wt % Si enhances the ductility of the alloy while maintaining its strength through a synergistic effect involving dislocations and phase transformation. Furthermore, in the Si0.2 alloy, the integrity of 9R structures is preserved, thereby enhancing the transformation-induced plasticity (TRIP) effect and facilitating attainment of an optimal balance between strength and ductility. However, incorporation of 0.1 wt % and 0.3 wt % Si content leads to a decline in mechanical properties due to improper Si content causing grain growth and premature phase transition. Therefore, meticulous selection of an appropriate Si content is crucial for simultaneously enhancing both strength and ductility. © 2024, The Authors. All rights reserved.

关键词： Ductility

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GUEST EDITORIAL

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China Communications 2023年第2期 3-6页

作者： Yuan Wu Xu Chen Feng Lyu Xianfu Chen Xumin Huang Jie Gao Yueyue Dai Tony Q.S.Quek Yan Zhang the State Key Laboratory of Internet of Things for Smart City University of Macau the Department of Computer and Information Science University of Macau Sun Yat-sen University Sun Yat-sen University Institute of Advanced Networking and Computing Systems Sun Yat-sen University National and Local Joint Engineering Laboratory the School of Computer Science and Engineering Central South University the VTT Technical Research Centre of Finland the School of Automation Guangdong University of Technology the School of Information Technology Carleton University Huazhong University of Science and Technology Singapore University of Technology and Design(SUTD) the IEEE Communications Society Technical Committee on Green Communications and Computing(TCGCC)

With the growing maturity of the advanced edge-cloud collaboration and integrated sensing-communication-computing systems, edge intelligence has been envisioned as one of the enabling technologies for ubiquitous and l...

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Synergistic Effects of Kinetics and Lyophilicity Stimulated by Mg2+/Li+ Co-Insertion in Bi2-XsbXs2 Toward Reversible Hybrid Batteries

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SSRN 2024年

作者： Du, Yibo Wang, Zhitao Ma, Heping Si, Wenhui Wang, Wenlong Zhang, Wenming Yang, Hui Ying Chen, Song Hebei Key Laboratory of Optic-Electronic Information and Materials National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices College of Physics Science and Technology Hebei University Baoding071002 China Henan Engineering Research Center of Design and Recycle for Advanced Electrochemical Energy Storage Material School of Materials Science and Engineering Henan Normal University Xinxiang453007 China Pillar of Engineering Product Development Singapore University of Technology and Design 8 Somapah Road 487372 Singapore Singapore

Co-intercalation type hybrid magnesium-lithium-ion batteries (MLIBs) have received widespread attention in recent years for higher electrolyte utilization and conspicuous insertion kinetics. However, the co-intercalation strategy is rarely explored in replaceable anode host structures. We propose a cation exchange strategy to optimize metal sulfide, endowing MLIBs with high specific capacity, prominent cycle stability and rate performance. Kinetics analyses combined with density functional theory (DFT) calculations demonstrate the preferential absorption of Mg2+/Li+ in Bi-Sb sites and fast migration kinetics induced by Mg2+/Li+ co-insertion. COMSOL Multiphysics simulations further prove the prominent lyophilic effect of the bimetallic sulfide in facilitate ion diffusion. In addition, the multi-step reaction mechanisms and structural evolutions are profoundly revealed by a series of ex-situ investigations. Our findings provide inspirations on exploring novel electrode materials with outstanding electrochemical performance toward large-scale energy storage applications. © 2024, The Authors. All rights reserved.

关键词： Lithium-ion batteries

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Creep Prediction Model of Concrete-Filled Steel Tube under Different Core Concrete Conditions 3

Creep Prediction Model of Concrete-Filled Steel Tube under D...

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2021 3rd International Conference on Advanced Materials and Ecological Environment, AMEE 2021

作者： Xiong, Zeyu Zhang, Rongling Ma, Lina Hao, Zhaofeng Lv, Wenda Li, Wenbo School of Civil Engineering Lanzhou Jiaotong University Lanzhou China National and Local Joint Engineering Laboratory Road and Bridge Engineering Disaster Prevention Technology Lanzhou Jiaotong University Lanzhou China Lanzhou Railway Design Institute Co. Ltd. Lanzhou China

To reasonably predict the creep law of concrete-filled steel tubular (CFST) members under different working conditions, four groups of creep tests were carried out, and the creep curves of CFST specimens with defects were obtained. Based on the creep prediction formula given in the code for the design of CFST highway arch bridges issued in 2015, the creep prediction models of CFST under different core concrete conditions are studied. The results show that the concrete microcracks around the cavity defects are continuously generated and expanded during the compression process, resulting in the dislocation and sliding of the concrete. It increases the additional deformation of CFST;debonding defects hinder the redistribution of stress between the steel tube and the core concrete, weaken the interaction effect between the steel tube and the concrete, and increase the creep deformation of the core concrete. According to Different core concrete states, appropriate reference factors are selected to modify the creep prediction formula of CFST, which greatly improves the creep prediction accuracy of CFST members and defective members. © Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence.

关键词： Creep

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