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Quantitative Investigation on Structural Evolution of Co-continuous Phase under Shear Flow

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Chinese Journal of Polymer Science 2022年第6期40卷 593-601页

作者： Jin Yin Qing-Feng Ouyang Zhao-Bo sun Feng-Yang Wu Qian Liu Xi-Xi Zhang Ling Xu hao Lin Gan-Ji zhong zhong-Ming Li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China

Components of co-continuous phase can form an interpenetrating network structure,which has great potential to synergistically improve the mechanical properties of the blends,and to impart the functional blends superior electrical conductivity and *** this work,the effects of shear rates(50-5000 s^(-1))at different temperatures on the phase morphology,phase size and lamellar crystallites of biodegradable co-continuous polybutylene terephthalate(PBAT)/polybutylene succinate(PBS)blend are quantitatively *** results show that the above features of the PBAT/PBS have a strong dependence on the shear flow and thermal *** co-continuous phase of the blend is well maintained at 130℃.Interestingly,this phase structure transforms into a“sea-island”structure at 160℃,which gradually recovers to a co-continuous phase when the shear rate increases from 1000 s^(-1) to 5000 s^(-1).The phase size decreases with the increase of shear rate both at 130℃ and 160℃ due to the refinement and deformation of phase structures caused by strong shear ***,a unique phenomenon is observed that the shear-induced lamellar crystallites are oriented perpendicular to shear direction in the range of 500-5000 s^(-1) at 130℃,while the orientation of lamellar crystallites at 160℃ is along the shear direction within the whole range of shear *** degree of orientation for the PBAT/PBS blend crystals increases first and then decreases at both temperatures *** addition,the range of shear rate has reached the level in the industrial ***,this work has important guiding significance for the regulation of the co-continuous phase structure and the performance for the blend in the practical processing.

关键词： Co-continuous phase Shear rate Phase size Crystal orientation

Microstructure and texture evolution of TRC A8006 alloy by homogenization

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International Journal of Minerals,Metallurgy and Materials 2013年第5期20卷 433-439页

作者： zhong-wei Chen Jing Zhao Xiao-lei hao State Key Laboratory of Solidification Processing Northwestern Polytechnical University

The microstructure and texture evolution of twin-roll cast A8006 alloy by homogenization were characterized using scanning and transmission electron microscopy, and the microhardness was tested as well. According to the relation- ship between dendritic arm spacing and cooling rate the cooling rate of the as-cast twin-roll cast A8006 sheet of 6 mm in thickness was estimated as 1.48×10^3 K·s^-1. It is found that the grains and the nanostructural precipitates of the twin-roll cast sheet become coarser after homogenization at 580℃ for 4 h in comparison with those after homogenization at 500℃ for 8 h. The textures formed after cold rolling and became weaker during homogenization. The increase in hardness of the as-cast twin-roll cast sheets is related in hardness after homogenization can to the supersaturated a-A1 solid solution and be attributed to the coarsening of grains and fine microstructure, but the decrease Al6Fe（Mn） precipitates.

关键词： aluminum alloys homogenization microstructure textures hardness

Differential hepatic features presenting in Wilson disease-associated cirrhosis and hepatitis B-associated cirrhosis

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World Journal of Gastroenterology 2019年第3期25卷 378-387页

作者： hao-Jie zhong Huan-Huan sun Lan-Feng Xue Eileen M McGowan Yu Chen Department of Gastroenterology The First Affiliated Hospital of Guangdong Pharmaceutical University Department of Gastroenterology Guangdong Medical University Department of Gastroenterology The First Affiliated Hospital of Xi'an Jiao Tong University Faculty of Science University of Technology Sydney

BACKGROUND Cirrhosis is a chronic late stage liver disease associated with hepatitis viruses,alcoholism, and metabolic disorders, such as Wilson disease(WD). There are no clear markers or clinical features that define cirrhosis originating from these disparate origins. We hypothesized that cirrhosis is not one disease and cirrhosis of different etiology may have differential clinical hepatic *** To delineate the liver features between WD-associated cirrhosis and hepatitis Bassociated cirrhosis in the Chinese *** In this observational study, we reviewed the medical data of consecutive inpatients who had WD-associated cirrhosis or hepatitis B-associated cirrhosis from January 2010 to August 2018, and excluded patients who had carcinoma,severe heart or pulmonary diseases, or other liver diseases. According to the etiology of cirrhosis, patients were divided into two groups: WD-associated cirrhosis group(60 patients) and hepatitis B-associated cirrhosis group(56 patients). The liver fibrosis degree, liver function indices, and portal hypertension features of these patients were compared between the two *** No inter-group differences were observed in the diagnostic liver fibrosis markers,however, clinical features clearly defined the origin of cirrhosis. WD-associated cirrhosis patients(16-29 years) had lower levels of alanine transaminase,aspartate transaminase, and bilirubin, lower prothrombin time, lower incidence of hepatic encephalopathy, and lower portal vein diameter(P < 0.05), compared to cirrhosis resulting from hepatitis B in older patients(45-62 years). Importantly,they had decreased risks of progression from Child-Pugh grade A to B(odds ratio = 0.046, 95% confidence interval: 0.006-0.387, P = 0.005) and of ascites(odds ratio = 0.08, 95% confidence interval: 0.01-0.48, P = 0.005). Conversely, WDassociated cirrhosis patients had a higher risk of splenomegaly(odds ratio = 4.15,95% confidence interval: 1.38-12.45, P = 0.011).CON

关键词： Chronic hepatitis B Cirrhosis Hepatic feature Liver function Portal hypertension Wilson disease

An advanced cathode composite for co-utilization of cations and anions in lithium batteries

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Journal of Materials Science & Technology 2022年第7期102卷 72-79页

作者： Xiao-Tong Wang Yang Yang Jin-Zhi Guo Zhen-Yi Gu Edison Huixiang Ang zhong-Hui sun Wen-hao Li hao-Jie Liang Xing-Long Wu MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityChangchun 130024China Faculty of Chemistry Northeast Normal UniversityChangchun 130024China Natural Sciences and Science Education National Institute of EducationNanyang Technological UniversitySingapore 637616Singapore Center for Advanced Analytical Science c/o School of Chemistry and Chemical Engineeringc/o MOE Key Laboratory for Water Quality and Conservation of the Pearl River DeltaGuangzhou UniversityGuangzhou 510006China

Anions in the electrolyte are usually ignored in conventional"rocking-chair"batteries because only cationic de-/intercalation is *** ingenious scheme combining LiMn_(0.7)Fe_(0.3)PO_(4)(LMFP@C)and graphite as a hybrid cathode for lithium-ion batteries(LIBs)is elaborately designed in order to exploit the potential value of anions for battery *** hybrid cathode has a higher conductivity and energy density than any of the individual components,allowing for the co-utilization of cations and an-ions through the de-/intercalation of Li^(+)and PF_(6)−over a wide voltage *** optimal compound with a weight mix ratio of LMFP@C:graphite=5:1 can deliver the highest specific capacity of nearly 140 mA h/g at 0.1 C and the highest voltage plateau of around 4.95 V by adjusting the appropriate mixing *** addition,cyclic voltammetry was used to investigate the electrode kinetics of Li^(+)and PF_(6)−dif-fusion in the hybrid compound at various scan *** situ X-ray diffraction is also performed to further demonstrate the structural evolution of the hybrid cathode during the charge/discharge process.

关键词： Lithium Batteries Cathode Anion De-/Intercalation Graphite Li Mn0.7Fe0.3PO4

A novel modification method for the dynamic mechanical test using thermomechanical analyzer for composite multi-layered energetic materials

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Defence Technology（防务技术） 2023年第3期21卷 125-132页

作者： Le Qi Shi-lin Zhang hao Yuan zhong-liang Ma zhong-liang Xiao School of Environment and Safety Engineering The North University of ChinaTaiyuan030051China School of Chemical Engineering The Nanjing University of Science and TechnologyNanjing210094China

Herein,we present a thermo-mechanical analyzer(TMA)and dynamic mechanical analyzer(DMA)of composite multi-layered gun propellant,focusing on thermal expansion coefficients and dynamic thermomechanical *** linear thermal expansion coefficient of the prepared energetic material is determined as approx.0.1800×10^(-4)-0.2081×10^(-4)K^(-1).According to DMA test and dynamic thermomechanical properties,the glass transition temperature is also *** tested value is within the range of 223.01-223.50 K,which indicates the lower limit of the energetic ***,DMA tests reveal temperature changes,which occur due to thermal ***,the geometrical factor decreases with increasing ***,thermal expansion significantly affects the storage modulus and loss ***,the thermal expansion coefficient can be used to modify the storage and loss *** results show that the proposed method provides effective and reliable modified results.

关键词： composite dynamic expansion

2D materials for solar fuels via artificial photosynthesis

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National Science Review 2022年第5期9卷 19-21页

作者： Jian Du hao Yang Licheng sun Institute of Natural Sciences Westlake Institute for Advanced Study Center of Artificial Photosynthesis for Solar Fuels School of ScienceWestlake University Department of Chemistry School of Engineering Sciences in Chemistry Biotechnology and Health KTH Royal Institute of Technology State Key Laboratory of Fine Chemicals DUT-KTH Joint Education and Research Centre on Molecular Devices Dalian University of Technology

To create a globally carbon neutral society,sustainable energy systems to replace fossil fuels are needed *** in nature converts CO2and H2O into carbohydrates and O2and is driven by solar energy via photosystemⅡ(PSⅡ...

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Majorana zero mode in the vortex of an artificial topological superconductor

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Science China(Physics,Mechanics & Astronomy) 2017年第5期60卷 49-59页

作者： hao-Hua sun Jin-Feng Jia Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education) Department of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China

Majorana fermion （MF）, an exotic particle that is identical to its own antiparticle, was recently found in solid matter as a quasiparticle excitation, the Majorana zero mode （MZM）, in the vortex of an artificial topological superconductor （TSC）. This artificial TSC, first proposed by Fu and Kane in 2008, is a heterostructure made of a topological insulator BiETe3 and an s-wave superconductor NbSe2. This paper will briefly review the experimental progresses based on the Bi2Te3/NbSe2 heterostructure. All evidences are self-consistent and reveal that the MZM exists in the center of vortex. Those experimental results are also supported by theory. This finding is a milestone in the research ofMajorana fermions in solid state physics and a starting point of MZM＇s application in topological quantum computation.

关键词： Majorana fermion Majorana zero mode topological superconductor heterostructure vortex

Insights into efficient transition metal-nitrogen/carbon oxygen reduction electrocatalysts

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Journal of Energy Chemistry 2021年第5期30卷 470-485页

作者： hao-Yu Wang Chen-Chen Weng zhong-Yong Yuan National Institute for Advanced Materials School of Materials Science and EngineeringNankai UniversityTianjin 300350China

It is of vital importance to accelerate the sluggish oxygen reduction reaction(ORR)process at the cathode with earth-abundant metal-based catalysts for the commercialization of low-temperature polymer electrolyte membrane fuel *** consideration of high catalytic activity,long-term stability and low cost of potential ORR electrocatalysts,transition metal species have attracted much interest and transition metal-nitrogen-carbon(M-N/C,M=Fe,Co,Ni,Mn,etc.)catalysts have been widely considered as the most promising non-precious metal catalysts for ***,the fundamental understanding of ORR catalytic mechanism and the identification of active centers are briefly introduced,and then different M-N/C catalysts classified by precursors with the strategies for design and optimization are *** challenges and possible opportunity for future development of high-performance ORR catalysts are finally proposed.

关键词： Electrocatalysis Oxygen reduction reaction Metal-nitrogen/carbon Fuel cell

A head-to-head comparison of the coronary calcium score by computed tomography with myocardial perfusion imaging in predicting coronary artery disease

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Journal of Geriatric Cardiology 2012年第4期9卷 349-354页

作者： Mansour Almoudi zhong-Hua sun Discipline of Medical Imaging Department of Imaging and Applied Physics Curtin University GPO Box U1987 Perth Western Australia 6845 Australia

Objectives The coronary artery calcium (CAC) score has been shown to predict future cardiac events. However the extent to which the added value of a CAC score to the diagnostic performance of myocardial perfusion imaging (MPI) by single photon emission computed tomography (SPECT) is unclear. The purpose of this study is to investigate the correlation between CAC score and SPECT in patients with suspected coronary artery disease. Methods A retrospective review of the CAC scores by use of the Agatston calcium scoring method and cardiac SPECT diagnostic reports was conducted in 48 patients, who underwent both coronary computed tomography (CT) and SPECT examinations due to suspected coronary artery disease. A Pearson correlation test was used to determine the relation between CAC scores and MPI-SPECT assessments with regard to the evaluation of the extent of disease. Results Forty-seven percent of the patients had CAC scores more than 100, while 42% of these patients demonstrated abnormal, or probably abnormal, MPI-SPECT. Of the 23% of patients with a zero CAC score, only 7% had normal MPI-SPECT findings. No significant correlation was found between the CAC scores and MPISPECT assessments (r value ranged from 0.012 to 0.080), regardless of the degree of coronary calcification. Conclusions There is a lack of correlation between the CAC scores and the MPI-SPECT findings in the assessment of the extent of coronary artery disease. CAC scores and MPI-SPECT should be considered complementary approaches in the evaluation of patientswith suspected coronary artery disease.

关键词： Coronary artery disease Coronary calcium score Coronary computed tomography Myocardial perfusion imaging