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Preparation of a high-performance synthetic pitch from aromatic hydrocarbons containing N/Cl

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新型炭材料（中英文） 2024年第4期39卷 655-667页

作者： ZHANG Yu-kun lin xiong-chao GAO Hong-feng XI Wen-shuai WANG Cai-hong WANG Yong-gang School of Chemical&Environmental Engineering China University of Mining and Technology(Beijing)Beijing 100083China

The preparation of a synthetic pitch from aromatic monomers could easily regulate structure orientation at the molecu-lar level,which would be useful in *** isotropic synthetic pitch was prepared by a chlorine-and/or nitrogen-induced sub-stitution polymerization reaction method using aromatic hydrocarbon precursors containing Cl and N,which for this study were chloromethyl naphthalene and *** method was verified by investigating the structural changes under different synthesis conditions,and the synthesis mechanism induced by aromatics containing Cl was also *** result shows that the pyridinic N in quinoline contains a lone pair of electrons,and is an effective active site to induce the polymerization reaction by coupling with aromatic hydrocarbons containing *** reaction between such free radicals causes strong homopolymerization and oligomeriza-tion.A higher reaction temperature and longer reaction time significantly increased the degree of polymerization and thus increased the softening point of the pitch.A linear molecular structure was formed by the Cl substitution reaction,which produced a highly spinnable pitch with a softening point of 258.6℃,and carbon fibers with a tensile strength of 1163.82 MPa were *** study provides a relatively simple and safe method for the preparation of high-quality spinnable pitch.

关键词： Quinoline 1-Chloromethyl-naphthalene Synthetic pitch Spinnability Carbon fiber

Thermally triggered topological polymerization in diacetylene-functionalized covalent organic framework toward enhanced memristive properties

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Science China Chemistry 2025年

作者： Panke Zhou Yuxing Huang Ziyue Yu Cong Zhang Qian Chen Yiping Li chao lin xiong Chen State Key Laboratory of Photocatalysis on Energy and Environment Key Laboratory of Advanced Carbon-Based Functional MaterialsCollege of Chemistry Fuzhou University

The development of stimuli-responsive switching memory devices and the elucidation of their switching mechanisms in specific environments are crucial for advancing the field of molecular electronics. Herein, we propose two distinct two-dimensional covalent organic frameworks (COFs), namely Py-EDA and Py-BDA, incorporating acetylene (-C≡C-) or diacetylene(-C≡C-C≡C-) moieties, respectively, targeting fabricate memory devices exhibiting stimuli-responsive switching *** findings demonstrate that the incorporation of acetylene units effectively modulates the electronic band structure and enhances the degree ofπ-conjugation, resulting in devices that exhibit typical bipolar nonvolatile memory performance. Notably,upon thermal treatment, the memory behavior of the ITO/Py-BDA/Ag device transitions to a write-once-read-many-times(WORM) mode, displaying decreased SET voltage, increased ON/OFF current ratio, and remarkable retention reliability and cycle stability. This switching behavior is attributed to the occurrence of interlayer solid-state topological polymerization at 350℃, leading to the transformation of diacetylene columnar arrays into enyne chains within Py-BDA, thereby further promoting interlayer charge transfer and separation.

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Vertical gradients of neutral winds observed by ICON and estimated by the Horizontal Wind Model during the geomagnetic storm on August 26−28,2021

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Earth and Planetary Physics 2025年第1期9卷 69-80页

作者： JiaWei Wu chao xiong YuYang Huang YunLiang Zhou Department of Space Physics School of Electronic InformationHubei Luojia LaboratoryWuhan UniversityWuhan 430072China

The Michelson Interferometer for Global High-resolution Thermospheric Imaging(MIGHTI)onboard the Ionospheric Connection Explorer(ICON)satellite offers the opportunity to investigate the altitude profile of thermospheric *** this study,we used the red-line measurements of MIGHTI to compare with the results estimated by Horizontal Wind Model 14(HWM14).The data selected included both the geomagnetic quiet period(December 2019 to August 2022)and the geomagnetic storm on August 26-28,*** the geomagnetic quiet period,the estimations of neutral winds from HWM14 showed relatively good agreement with the observations from *** to the ICON observations,near the equator,zonal winds reverse from westward to eastward at around 06:00 local time(LT)at higher altitudes,and the stronger westward winds appear at later LTs at lower *** around 16:00 LT,eastward winds at 300 km reverse to westward,and vertical gradients of zonal winds similar to those at sunrise hours can be *** the middle latitudes,zonal winds reverse about 2-4 h *** winds vary more significantly than zonal winds with seasonal and latitudinal *** to the ICON observations,in the northern low latitudes,vertical reversals of meridional winds are found at 08:00-13:00 LT from 300 to 160 km and at around 18:00 LT from 300 to 200 km during the June *** reversals of meridional winds are found at 04:00-07:00 LT from 300 to 160 km and at 22:00-02:00 LT from 270 to 200 km during the December *** the southern low latitudes,meridional wind reversals occur at 08:00-11:00 LT from 200 to 160 km and at 21:00-02:00 LT from 300 to 200 km during the June *** the December solstice,reversals of the meridional wind appear at 20:00-01:00 LT below 200 km and at 06:00-11:00 LT from 300 to 160 *** the northern middle latitudes,the northward winds are dominant at 08:00-14:00 LT at 230 km during the June *** winds persist until

关键词： horizontal neutral winds vertical gradients Ionospheric Connection Explorer satellite Horizontal Wind Model 14 geomagnetic storm

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熔融灰渣侵蚀耐火材料的界面特性研究

燃料化学学报 2015年第2期43卷 138-144页

作者：徐荣声林雄超王永刚中国矿业大学(北京)化学与环境工程学院北京100083

研究了碱酸比不同的3种熔融煤灰(A、J1和J2)在莫来石和刚玉两种耐火材料上的界面特性。结果表明,A对莫来石和刚玉都有很好的润湿性,而J1和J2对这两种耐火材料则经历由不完全润湿到润湿的过程。熔渣与耐火材料(S-R)界面宽度随着接触角减... 详细信息

研究了碱酸比不同的3种熔融煤灰(A、J1和J2)在莫来石和刚玉两种耐火材料上的界面特性。结果表明,A对莫来石和刚玉都有很好的润湿性,而J1和J2对这两种耐火材料则经历由不完全润湿到润湿的过程。熔渣与耐火材料(S-R)界面宽度随着接触角减小而增大。从灰渣开始熔融至1 520℃,熔融煤灰J1在耐火材料表面上的接触角随着倾角的增加而减小;当倾角为20°时,其接触角突然增大。SEM-EDS分析表明,由于界面反应,A比J1更容易渗透进入耐火材料内部。对于碱酸比不同的煤灰,渗透和酸碱反应是熔渣对耐火材料腐蚀的关键。

关键词：耐火材料灰渣侵蚀界面

Flexible Graphene Field‑Effect Transistors and Their Application in Flexible Biomedical Sensing

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Nano-Micro Letters 2025年第2期17卷 252-313页

作者： Mingyuan Sun Shuai Wang Yanbo Liang chao Wang Yunhong Zhang Hong Liu Yu Zhang lin Han Institute of Marine Science and Technology Shandong UniversityQingdao 266237ShandongPeople’s Republic of China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100ShandongPeople’s Republic of China School of Integrated Circuits Shandong UniversityJinan 250100ShandongPeople’s Republic of China Shandong Engineering Research Center of Biomarker and Artificial Intelligence Application Jinan250100ShandongPeople’s Republic of China

Flexible electronics are transforming our lives by making daily activities more *** to this innovation are field-effect transistors(FETs),valued for their efficient signal processing,nanoscale fabrication,low-power consumption,fast response times,and ***,known for its exceptional mechanical properties,high electron mobility,and biocompatibility,is an ideal material for FET channels and *** combination of graphene and FETs has given rise to flexible graphene field-effect transistors(FGFETs),driving significant advances in flexible electronics and sparked a strong interest in flexible biomedical ***,we first provide a brief overview of the basic structure,operating mechanism,and evaluation parameters of FGFETs,and delve into their material selection and patterning *** ability of FGFETs to sense strains and biomolecular charges opens up diverse application *** specifically analyze the latest strategies for integrating FGFETs into wearable and implantable flexible biomedical sensors,focusing on the key aspects of constructing high-quality flexible biomedical ***,we discuss the current challenges and prospects of FGFETs and their applications in biomedical *** review will provide valuable insights and inspiration for ongoing research to improve the quality of FGFETs and broaden their application prospects in flexible biomedical sensing.

关键词： Flexible Graphene Field-effect transistor Wearable Implantable Biosensor

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淖毛湖煤加氢液化过程杂原子迁移转化研究

燃料化学学报 2021年第5期49卷 656-663页

作者：林雄超殷甲楠丁雄文王永刚徐振刚中国矿业大学(北京)化学与环境工程学院北京100083

以淖毛湖煤为原料,进行加氢直接液化,考察了加氢温度与转化率和油收率的关系,并解析了加氢条件下煤中硫、氮和氧的迁移转化特性。结果表明,淖毛湖煤具有良好的液化性能,400℃和2 MPa氢初压条件下即可达到69.6%的转化率和55.3%的油产率... 详细信息

以淖毛湖煤为原料,进行加氢直接液化,考察了加氢温度与转化率和油收率的关系,并解析了加氢条件下煤中硫、氮和氧的迁移转化特性。结果表明,淖毛湖煤具有良好的液化性能,400℃和2 MPa氢初压条件下即可达到69.6%的转化率和55.3%的油产率。结合气相色谱质谱联用(GC-MS)和气相色谱-原子发射光谱(GC-AED)等方法对产物分析发现,以弱键合结构存在的硫、氮和氧等杂原子易发生加氢裂解生成H_(2)S、NH3、H_(2)O等。液化油品中含硫化合物主要以噻吩及噻吩同系物为主;含氮化合物含量极低,主要由含氮杂环化合物构成;含氧化合物在液化油中主要以酚及酚的同系物为主。存在于芳香结构中的杂原子会随着自由基缩合反应,生成更稳定的含杂原子稠环化合物富集在液化残渣中。

关键词：淖毛湖煤直接液化杂原子迁移规律

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铁系催化剂催化淖毛湖煤加氢液化反应研究

化学工程 2020年第4期48卷 70-74页

作者：林雄超丁雄文罗萌殷甲楠中国矿业大学(北京)化学与环境工程学院北京100083

煤直接液化的关键是催化剂体系的优化。文中采用小型加氢反应装置和多种仪器分析方法,研究了铁系催化剂催化淖毛湖煤直接加氢液化反应性能及过程杂原子分布特征。发现升华S作为助剂较SO 42-催化效果更好;FeOOH和S对沥青质有较好的催化... 详细信息

煤直接液化的关键是催化剂体系的优化。文中采用小型加氢反应装置和多种仪器分析方法,研究了铁系催化剂催化淖毛湖煤直接加氢液化反应性能及过程杂原子分布特征。发现升华S作为助剂较SO 42-催化效果更好;FeOOH和S对沥青质有较好的催化转化作用。复合Fe/Ni催化活性较单Fe活性略低,对沥青质的转化效果较差。液化产物中正己烷可溶组分含有较多的正构烷烃,碳数可达到C 28。含氮杂环化合物中,主要含喹啉和异喹啉。含硫杂环化合物主要为噻吩类,苯并噻吩类和苯硫醚等。硫化物部分来自原煤并与添加的硫助剂有关。液化过程中氧元素和硫元素反应活性较高,氮元素反应活性较低,其在液化残渣中的含量几乎不变。

关键词：煤液化铁系催化剂杂原子 GC-AED

化学教育基础化学与特色专业化学的承接与协调——以煤化学中“胶质体”为例

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化学教育（中英文） 2019年第10期40卷 77-81页

作者：林雄超王永刚中国矿业大学(北京)化学与环境工程学院北京100083

针对特色专业化学教学过程中与基础化学知识的承接和协调问题,将繁杂的基础知识和专业理论设定成不同的学习目标,对课程内容重新梳理和组织。以PBL教学理念进行教学设计,强化学习过程中的自我管理和解决问题的能力;以CBL模式进行案例分... 详细信息

针对特色专业化学教学过程中与基础化学知识的承接和协调问题,将繁杂的基础知识和专业理论设定成不同的学习目标,对课程内容重新梳理和组织。以PBL教学理念进行教学设计,强化学习过程中的自我管理和解决问题的能力;以CBL模式进行案例分析,将抽象枯燥的理论知识变成直观、生动、形象的案例,促使学生不断思考该问题或现象出现的原因和机制,克服了普通教学法理论与实践相互联系不足的缺点。对知识点的讲解采取"因-果"相承、"点-面"结合、"抽象-具体"对照的授课方法,获得了良好的教学效果。

关键词：基础化学承接与协调 CBL模式 PBL模式煤化学

碱溶液改性ZSM-5分子筛直接催化合成气制低碳烯烃

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现代化工 2020年第3期40卷 126-130,136页

作者：林雄超李晓佳丁雄文罗萌殷甲楠中国矿业大学(北京)化学与环境工程学院北京100083

通过Na和K等碱金属溶液对ZSM-5载体进行离子交换改性,采用等体积浸渍法制备合成气制低碳烯烃铁基催化剂,采用N2吸附-脱附、SEM、XRD、TPR等测试手段对催化剂进行表征。在固定床催化反应装置中考察了铁基催化剂在纯氢气氛围中预还原4 h后... 详细信息

通过Na和K等碱金属溶液对ZSM-5载体进行离子交换改性,采用等体积浸渍法制备合成气制低碳烯烃铁基催化剂,采用N2吸附-脱附、SEM、XRD、TPR等测试手段对催化剂进行表征。在固定床催化反应装置中考察了铁基催化剂在纯氢气氛围中预还原4 h后,在325℃、1.5 MPa、气体空速为1200 h-1、V(H2)∶V(CO)=2∶1条件下进行合成气制低碳烯烃的催化性能研究。结果表明,改性后载体孔径变大,加速原料气在催化剂的内部扩散,产物烯烃可及时析出,避免二次反应生成烷烃,提高了CO的转化率和烯烃的选择性。通过碱金属对ZSM-5的改性,合成气的转化率可提高30%~40%,转化率与碱金属活性成正比。此外,催化剂的催化活性随KOH溶液浓度的增加先增加后降低,当KOH溶液浓度为0.1 mol/L时,CO+H2的转化率和烯烃的选择性均最高,分别为81.84%和49.67%。

关键词：合成气 ZSM-5分子筛低碳烯烃选择性