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Preparation of Poly-α-Olefin Microcapsule Particles Coated with Polyurethane as a drag reducer Based on Interface Polymerization

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China Petroleum Processing & Petrochemical technology 2023年第2期25卷 101-112页

作者： Li Chenhao Lu Yong Li Hao Chen Yue Meng Yeqiao Zhou Pengfei Xu dan Wang Yiran Zhang Xiaolai Shandong University Jinan 250100China PipeChina Eastern China Crude Oil Storage and Transportation Co. LtdScience and Technology R&D CenterXuzhou 221000China Shandong Dongyue Polymer Material Co. Ltd.Zibo 256401China State Key Lab of Fluorinated Functional Membrane Materials Zibo 256401China

The molecular behavior of polyurethane(PU)coating materials during the surface adsorption of poly-α-olefin as a drag reducing polymer was explored by a molecular dynamics *** different PU capsule wall materials were synthesized using two reaction monomers,and a poly-α-olefin/PU drag reducer microcapsule was prepared based on interface *** structure,morphology,thermal stability,compressive strength,and drag reduction performance of the microcapsules were characterized and *** results showed that a non-bonding interaction induced the adsorption of the PU coating material,poly-α-olefin and PU then fused at the interface,and the PU coating material was embedded into the inner grooves of poly-α-olefin in the form of a local mosaic,thereby forming a stable core–shell *** morphological characterization indicated that PU and poly-α-olefin could form microcapsule *** thermal decomposition temperature of the microcapsule was dependent on the type of capsule wall *** microcapsule structure had a slight effect on poly-α-olefin drag *** system enabled poly-α-olefin to exist in powdered particles through microcapsulation,and had a good dispersion effect that facilitated storage and transport *** method effectively inhibited the accumulation and bonding of poly-α-olefin at room temperature.

关键词： drag reducer poly-α-olefin polyurethane microcapsules particles interfacial polymerization

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High-Speed Wired drill Pipe and its Corresponding Manufacture & Test technology research

High-Speed Wired Drill Pipe and its Corresponding Manufactur...

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2021 Abu dhabi International Petroleum Exhibition and Conference, AdIP 2021

作者： Han, Haochen Zhang, Yong Chen, Jia Sun, Qi Fang, Zhimeng Li, Hexiang Liu, Zeng Zhang, Guobin CNPC Engineering and Technology R&D Company CNPC Materials Procurement Center

ISBN: (纸本)9781613998342

High-speed wired drill pipe and its corresponding communication technology not only can achieve high-speed transmission rate and high-capacity, but also can realize real-time monitoring and dual-way communication in whole section, which can prevent downhole problems effectively. As a series system, the homogeneity and robustness of these wired drill pipes are crucial. This paper focuses on how to overcome the difficulty in manufacturing process of information drill pipe and complete the validation test. In order to guarantee the quality of information drill pipe and satisfy the technological requirements of mass production, we optimize the manufacturing process and put forward reasonable test techniques. The optimizations of manufacturing process include the analysis on constant tension of pressure pipe, quantitative cutting pipe and perforation in pipe nozzle. The testing techniques includes magnetic coupling coil impedance test, high pressure test, communication performance test of both single pipe and series system. The test result can be judged and evaluated by the attenuation value of the signal attenuation test and the signal reflection waveform as well as sealing reliability. With the help of the optimization of the manufacturing process and the application of new tooling, the quality and robustness of information drill pipe is improved obviously. Pass rate in primary assembly is increased from 70% to 92%. After the second assembly, pass rate can be increased to 99.5%. Besides, the work efficiency is greatly improved and the process requirements of mass production are satisfied. The validation test can screen out the drill pipe with poor quality and performance effectively thus to improve the reliability of the whole system. By means of the improvement of manufacturing and the validation test, the comprehensive pass rate of information drill pipes is increased from 84% to 95%. during three field tests in Jilin and daqing Oilfield, the information drill pipes

关键词： drills

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reduction effect of final-pass heavy reduction rolling on the texture development,tensile property and stretch formability of ZWK100 alloy plates

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Journal of materials Science & technology 2022年第16期111卷 211-223页

作者： B.Q.Shi L.Y.Zhao X.L.Shang B.H.Nie d.C.Chen C.Q.Li Y.Q.Cheng School of Materials Science and Hydrogen Energy Foshan UniversityFoshan 528000China School of Materials and Energy Guangdong University of TechnologyGuangzhouGuangdong 510006China GD Midea Air-Conditioning Equipment Co. Ltd.Foshan 528311China Guangdong Key Laboratory of Hydrogen Energy Technology Foshan 528000China YunFu(Foshan)R&D Center of Hydrogen Energy Standardization Yunfu 527326China

Obviously planar anisotropy due to‘Td split’orthotropic texture(Td indicates Transverse direction)always exist in the rare-earth(rE)or Ca containing Mg alloy sheets,which is likely caused by the lowreduction rolling(and annealing)as revealed in our previous *** this work,the as-cast billets of a ZWK100 alloy were subjected to final-pass heavy reduction rolling(FHrr)at 500°C with different reductions(30%-70%)after rough rolling,aiming to investigate the reduction effect on the microstructure and texture *** results show that FHrr with higher reductions above 50%is in favor of shear banding formation but has little effect on the as-deformed texture components,and the excellent formability with single-pass reduction up to 70%is mainly ascribed to the activation of prismatic *** with reduction above 50%and annealing can generate uniform grain structures of~10μm and symmetrical‘oblique-line split’texture in(0001)pole figures,with basal poles tilting by about 50°from Nd(Normal direction)towards some oblique-line of Td and rd(rolling direction)as well as uniform distribution of counter lines as an annular shape,resulting in excellent elongation to failure of~50%and ultra-low planar anisotropyΔr_of~0.1 and high stretch formability(Erichsen value:8.1).The formation‘oblique-line split’texture in(0001)pole figures is mainly correlated with the preferred growth tendency of grains with■//rd,which was suggested to relate to the high mobility of some special boundaries such as 40°-45°■.The influences of starting textures on the mechanical properties,planar anisotropy and related deformation modes,as well as their correlations with the stretch formability were comparatively investigated with the‘Td split’orthotropic texture as a counterpoint.

关键词： Magnesium alloys Texture Plane anisotropy Stretch formability rolled sheets

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robust bonding at 175°C of pressureless Ag nanoparticle sinter joint on Ni/Au finished Cu substrates in air 22

Robust bonding at 175°C of pressureless Ag nanoparticle sin...

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22nd International Conference on Electronics Packaging, ICEP 2023

作者： Kim, Seoah Kim, Min-Su Mhin, Sungwook Kim, dongjin Korea Institute of Industrial Technology Advance Joining and Additive Manufacturing R&D Department Incheon21999 Korea Republic of Kyonggi University Graduate School Department of Advanced Materials Engineering Suwon16227 Korea Republic of

ISBN: (纸本)9784991191152

Ag sinter joining which has exceptional characteristics is promising as a die-attach material for wide band-gap (WBG) power devices in electric vehicles (EVs). So far, many Ag sinter joining technologies in the range of 250 °C to 300 °C have been developed, but the industry still requires lower die-attach temperatures and more accessible processing methods. We have been pursuing technology that minimizes die-attach temperature and pressure to minimize the warpage of the power module structure. In this work, a pressureless Ag sintering was carried out in air at 175 °C without any pressure, and the bonding strength achieved approximately 37 MPa. The robust bonding mechanism of the Ag sinter joining was investigated using EBSd and Xrd analysis on the microscale. This study can provide a solution for the possibility of the diebonding process at 175 °C and effective heat dissipation design of the power module. © 2023 Japan Institute of Electronics Packaging.

关键词： Energy gap

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Hot-deformation kinetics analysis and extrusion parameter optimization of a dilute rare-earth free magnesium alloy

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Journal of Magnesium and Alloys 2023年第9期11卷 3302-3322页

作者： Qinghang Wang Haowei Zhai Zhaoyang Jin Junjie He Qin Yang Wenjun Liu Yulong Li daolun Chen School of Mechanical Engineering Yangzhou UniversityNo.196 West Huayang RoadHangjiangYangzhou225127China School of Materials and Energy Yunnan UniversityKunming650599China Changan Auto Global R&D Center Chongqing401120China College of Materials Science and Engineering Chongqing University of TechnologyChongqing400054China Department of Mechanical and Industrial Engineering Toronto Metropolitan University(formerly Ryerson University)TorontoON M5B 2K3Canada

The fundamental research on thermo-mechanical conditions provides an experimental basis for high-performance Mg-Al-Ca-Mn ***, there is a lack of systematical investigation for this series alloys on the hot-deformation kinetics and extrusion parameter optimization. Here, the flow behavior, constitutive model, dynamic recrystallization(drX) kinetic model and processing map of a dilute rare-earth free Mg-1.3Al-0.4Ca-0.4Mn(AXM100, wt.%) alloy were studied under different hot-compressive conditions. In addition, the extrusion parameter optimization of this alloy was performed based on the hot-processing map. The results showed that the conventional Arrhenius-type strain-related constitutive model only worked well for the flow curves at high temperatures and low strain rates. In comparison, using the machine learning assisted model(support vector regression, SVr) could effectively improve the accuracy between the predicted and experimental values. The drX kinetic model was established, and a typical necklace-shaped structure preferentially occurred at the original grain boundaries and the second phases. The drX nucleation weakened the texture intensity, and the further growth caused the more scattered basal texture. The hot-processing maps at different strains were also measured and the optimal hot-processing range could be confirmed at the deformation temperatures of 600~723 K and the strain rates of 0.018~0.563 s^(-1). Based on the optimum hot-processing range, a suitable extrusion parameter was considered as 603 K and 0.1 mm/s and the as-extruded alloy in this parameter exhibited a good strength-ductility synergy(yield strength of ~ 232.1 MPa, ultimate strength of ~ 278.2 MPa and elongation-to-failure of ~ 20.1%). Finally, the strengthening-plasticizing mechanisms and the relationships between the drXed grain size, yield strength and extrusion parameters were analyzed.

关键词： Mg-Al-Ca-Mn alloy Constitutive model dynamic recrystallization kinetic model Extrusion parameter optimization Strengthening-plasticizing mechanisms

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BOE-ziSIM: A design-technology-Manufacturing Co-optimization Platform 7

BOE-ziSIM: A Design-Technology-Manufacturing Co-optimization...

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7th International Workshop on Advanced Patterning Solutions, IWAPS 2023

作者： Liu, Nan Zhang, Zhizhao Chen, Shantao dong, Lisong Wang, Hong Technology R&D Center Beijing Zhongxiangying Technology Co. Ltd Beijing China Panel Technology Development BOE Technology Group Co. Ltd. Beijing China Institute of Microelectronics of Chinese Academy of Science Beijing China Beijing Zhongxiangying Technology Co. Ltd Beijing China

ISBN: (纸本)9798350344547

Thin-film transistors (TFT) and organic light-emitting diodes (OLEd) for display applications involve new materials, structures and processes in the design and development phase, and these elements can have a significant impact on the performance of the TFT devices. The increasing need for personalized and diversified display productions brings two problems: 1. To achieve the desired performance indicators in fabrication processes, a large number of experiments are required to continuously optimize the process parameters, which not only increases economic and time costs but also limits the development speed of new productions. 2. The display production iterations are getting faster to meet the market requirement, in other words, the time left for yield improvement becomes shorter. A design-technology-Manufacturing Co-optimization platform called BOE-ziSIM is introduced in this paper, it was developed to solve the above mentioned problems, the experiment results show that the defects analysis time is reduced from hours to minutes, and the equipment adjustment time is reduced from days to minutes. © 2023 IEEE.

关键词： Thin film transistors

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Multifunctional polyeugenol-based nanoparticles with antioxidant and antibacterial properties

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Particuology 2024年第4期87卷 194-204页

作者： Qiaoqiao Lan Xuying Zhang Jiaming Liang Wei Wang Leili Lv Jiamin He Zefeng Wang Chunsheng Qu The People's Hospital of Lishui Lishui323000China College of Ecology Lishui UniversityLishui32300China R&D Center of Green Manufacturing New Materials and Technology of Synthetic Leather Sichuan University-Lishui University Lishui323000China

Over the past few decades,extensive scientific has been dedicated to polymer synthesis employing renewable *** this study,we devised and synthesized multifunctional polyeugenol-based nanoparticles,exhibiting remarkable antioxidant and antibacterial *** grafting of eugenol onto the nanoparticle surface was achieved via a thiol-ene chemical reaction with a grafting rate of 3.5%.To comprehend the properties of the synthesized nanoparticles,we employed Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy and pyrolysis-gas chromatography mass *** scanning electron microscopic and transmission electron microscopic analyses revealed the presence of a crosslinked structure within the polyeugenol-based nanoparticles,as well as a heteroge-neous microsphere structure on the *** to the inherent crosslinking structure,the polyeugenol-based nanoparticles demonstrated robust the resistance to solvents,as ascertained through thermog-ravimetric analysis and solvent resistance ***,nitrogen adsorption/desorption studies confirmed the adsorption capacity of the polyeugenol-based nanoparticles,rendering them potentially suitable for drug transport ***,the assays for assessing cytocompatibility and reactive oxygen species scavenging activities demonstrated better performance of the eugenol-based nano-particles compared to ***,the polyeugenol-based nanoparticles exhibited certain bactericidal activities against Escherichia coli,Staphylococcus aureus,and Fusobacterium ***,these observations indicated the nontoxic nature and expansive application prospects of the polyeugenol-based nanoparticles in the domains of medicine and food *** work presented a pioneering concept for the development of antioxidant and antibacterial multifunctional polymer materials derived from eugenol.

关键词： Polyeugenol-based nanoparticles Bactericidal activities Cytocompatibility

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Ongoing Evolution of drAM Scaling via Third dimension -Vertically Stacked drAM -

Ongoing Evolution of DRAM Scaling via Third Dimension -Verti...

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Symposium on VLSI technology

作者： J.W. Han S.H. Park M.Y. Jeong K.S. Lee K.N. Kim H.J. Kim J.C. Shin S.M. Park S.H. Shin S.W. Park J.H. Lee S.H. Kim B.C Kim M.H. Jung I.Y. Yoon H. Kim S.U. Jang K.J. Park Y.K. Kim I.G. Kim J.H Oh S.Y. Han B.S. Kim B.J. Kuh J.M. Park DRAM Technology Development Hwaseong Korea Next Generation Process Development Samsung R&D Center Hwaseong Korea

For the past decades, the density of drAM has been remarkably increased by making access transistors and capacitors smaller in size per unit area. However, shrinking devices far beyond the 10 nm process node increasingly poses process and reliability challenges. As Flash technology made a pivotal and successful innovation via 3d NANd, drAM technology may also adopt vertical stacking memory cells. Vertically stacked drAM (VS-drAM) continues to increase bit density on a die by increasing the number of layers along with reducing the size of the transistor. In this paper, the opportunities and challenges of VS-drAM are discussed.

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research on the Security Verification and Evaluation System of distribution Network dispatching Instructions in Telephone Mode 3

Research on the Security Verification and Evaluation System ...

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3rd International Conference on Energy, Power and Electrical Engineering, EPEE 2023

作者： Zhu, Chaoyue Huang, di Liu, Hongwei Chen, Panxia Luo, Shaojie Zheng, Weiyan Zhejiang Dayou Industrial Co. Ltd. Hangzhou Science and Technology Development Branch R&d Department Hangzhou China Business Service Center State Grid Hangzhou Power Supply Company Hangzhou China

ISBN: (纸本)9798350318180

Nowadays, the issue of command security in the distribution network dispatching telephone command mode is becoming increasingly prominent, and relevant personnel are paying more and more attention to the information security and accuracy when transmitting dispatching instructions to the distribution network, to prevent risks such as tampering, forgery, and theft of dispatching instruction information. The article first briefly analyzes the problems that exist in the telephone command mode during scheduling;Secondly, in response to the data security issues related to the issuance of instructions in the distribution network, based on cloud storage technology, the S-box is improved in the group encryption algorithm AES, and a chaotic system is introduced for data sequence encryption. The improved AES algorithm is combined with the chaotic system to achieve confidentiality of both parties' codes and information transmission;Simultaneously introducing upper entropy, using entropy to randomly verify the completeness and accuracy of numbers or information;Finally, the effectiveness of this method was theoretically proven, achieving efficient communication of scheduling information and ensuring the confidentiality and accuracy of received scheduling instructions. © 2023 IEEE.

关键词： cloud storage distribution network security verification and evaluation

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Experimental demonstration of multiparty reference-frame-independent QKd

Experimental demonstration of multiparty reference-frame-ind...

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Lee, donghwa Shin, Kyujin Kim, Yosep Lim, Hyang-Tag Kim, Yong-Su Seoul02792 Korea Republic of Division of Nano & Information Technology KIST School Korea University of Science and Technology Seoul02792 Korea Republic of Materials Research & Engineering Center R&D Division Hyundai Motor Company Uiwang16082 Korea Republic of

We report that rFI-QKd protocol can be extended to multiparty system using Greenberger-Horne-Zeilinger (GHZ) state. We derive the asymptotic key rate and perform proof-of-principle experiment to verify the feasibility...

ISBN: (纸本)9781957171258

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