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Chinese Journal of polymer science 2001年第3期19卷 297-301页

作者： Zi-chen li Yue Shen Yu-zeng liang fu-{3. li department of polymer science & engineering College of Chemistry Peking University beijing 100871, china beijing Univ Coll Chem Dept Polymer Sci & Engn Beijing 100871 Peoples R China

The morphological transition of molecular assemblies in aqueous solutions for a new amphiphilic diblock copolymer induced by changing the initial solvent conditions was studied by transmission electron microscopy (TEM). The copolymer was polystyrene(77)-b-poly[2-(beta -D-glucopyranosyloxy)ethyl acrylate (6)] (PSt(77)-b-PGEA(6)) and the solvent was a mixture of DMF and THF. PSt(77)-b-PGEA(6) yields vesicles and tubules when it is initially dissolved in THF and DMF respectively. The morphological transition between vesicles and tubules can be achieved by simply varying the amounts of THF and DMF, or changing the temperature at which the aggregates were prepared.

关键词： block copolymer amphiphile glycopolymer self-assembly tubule vesicle

SYNTHESIS AND CHARACTERIZATION OF POLYSILOXANE CONTAINING OliGO(OXYETHYLENE)SULFATE SALT

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Chinese Journal of polymer science 2000年第2期18卷 109-113页

作者： Shu-wen Hu Zheng-cheng Zhang FanYi Shi-bi Fang Xin-feng Zhang fu-mian li {3. of Chemistry, Peking University, beijing 100871, china Chinese Acad Sci Inst Chem Beijing 100080 Peoples R China Peking Univ Dept Chem Beijing 100871 Peoples R China

Solvent-free polymeric alkali-metal ion conductors, consisting of a comb-like polysiloxane with oligo(oxyethylene) side chains and pendant sulfate groups were synthesized by the hydrosilylation of allyl oligo(oxyethylene) sulfate salt and allyl methoxy oligo(oxyethylene) with poly(methylhydrosiloxane). The factors influncing the ionic conductivity of the resulting polymer such as the electrolyte content and the nature of the alkali-metal were investigated. The temperature dependence of conductivity was determined, and the ionic conductivity of the polymer follows the Vogel-Tammann-fulcher (VTF) equation.

关键词： hydrosilylation electrolytes ionic conductivity

Application of interpolated double network model for carbon nanotube composites in electrothermal shape memory behaviors

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Acta Mechanica Sinica 2024年第8期40卷 133-153页

作者： Ting fu Zhao Yan li Zhang Ran Tao Yiqi Mao department of engineering Mechanics College of Mechanical and Vehicle EngineeringHunan UniversityChangsha410082China State Key Laboratory of Explosion science and Technology Institute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing100081China

Multi-wall carbon nanotube filled shape memory polymer composite(MWCNT/SMC)possessed enhanced modulus,strength,and electric conductivity,as well as excellent electrothermal shape memory properties,showing wide design scenarios and engineering application *** thermoelectrically triggered shape memory process contains complex multi-physical mechanisms,especially when coupled with finite deformation rooted on micro-mechanisms.A multi-physical finite deformation model is necessary to get a deep understanding on the coupled electro-thermomechanical properties of electrothermal shape memory composites(ESMCs),beneficial to its design and wide *** into consideration of micro-physical mechanisms of the MWCNTs interacting with double-chain networks,a finite deformation theoretical model is developed in this work based on two superimposed network chains of physically crosslinked network formed among MWCNTs and the chemically crosslinked *** intact crosslinked chemical network is considered featuring with entropic-hyperelastic properties,superimposed with a physically crosslinked network where percolation theory is based on electric conductivity and electric-heating *** model is calibrated by experiments and used for shape recoveries triggered by heating and electric *** captures the coupled electro-thermomechanical behavior of ESMCs and provides design guidelines for MWCNTs filled shape memory polymers.

关键词： Shape memory polymer composite Viscoplastic constitutive relations Electro-thermomechanics Double network model Multiple shape memory

Balanced Polysulfide Containment and lithium Ion Transport in lithium-Sulfur Batteries via Nitrogen-doped Carbon Hollow Multi-shelled Structures on Modified Separators

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Chemical Research in Chinese Universities 2024年第4期40卷 690-698页

作者： RAO fu XIAO Qian WEI Yanze WANG Jiangyan YU Ranbo WANG Dan State Key Laboratory of Biochemical engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190P.R.China Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of SciencesBeijing100190P.R.China University of Chinese Academy of sciences Beijing100049P.R.China department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science&Technology BeijingBeijing100083P.R.China

Representing the next-generation technology in lithium-ion batteries,lithium-sulfur(li-S)batteries offer increased specific energy without relying on scarce metals like nickel and cobalt,but suffer from a low practical specific energy due to poor conductivity and a short lifespan due to the shuttle effect of *** the confinement of polysulfides and the transport of lithium ions requires highly elaborate modifiers for *** multi-shelled structures(HoMSs)show promise as hierarchical mesostructures for separators,offering multiple shell layers and internal cavities that effectively inhibit polysulfide *** design of these structures is crucial to address these challenges *** this study,nitrogen-doped carbon HoMS(NC HoMS)was created using polymer templates through a precisely controlled polymerization *** featuring NC HoMS-modified separators exhibit improved capacity and cycling stability in comparison to those utilizing commercial ***,triple-shelled NC HoMS strikes a balance in polysulfide containment and lithium ion *** a sulfur loading of 6.3. mg/cm^(2),the li-S battery can consistently complete 100 charge-discharge cycles,starting with a discharge capacity of 966.4 mA·h/g with a 75.8%capacity retention *** HoMS holds potential as the separator modifier in addressing the polysulfide shuttle problem and facilitating the li-ion transportation for advanced li-S batteries.

关键词： Hollow multi-shelled structure Carbon material li-S battery Separator modification Shuttle effect

DEGRADABLE THERMORESPONSIVE POLYESTERS BY ATOM TRANSFER RADICAL POLYADDITION AND CliCK CHEMISTRY

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DEGRADABLE THERMORESPONSIVE POLYESTERS BY ATOM TRANSFER RADI...

AI for organic and polymer synthesis

第五届国际高分子化学学术讨论会

作者： li-Jing Zhang Bo-Tao Dong fu-Sheng Du and Zi-Chen li {3. National Laboratory for Molecular sciences(BNLMS) Key Laboratory of polymer Chemistry& Physics of Ministry of Education department of polymer science&engineering College of Chemistry and Molecular engineering Peking University {3. 100871 {13..

＜正＞LCST-type thermoresponsive polymers have found a variety of applications in biomedical science ranging from smart surfaces,bio-sensing and tissue {3. to intelligent drug/gene delivery.1 However,as most of the above polymers are based on carbon-carbon backbone,the non-degradability may limit their in vivo

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science china Chemistry 2024年第8期67卷 2461-2496页

作者： Xin Hong Qi Yang Kuangbiao liao Jianfeng Pei Mao Chen Fanyang Mo Hua Lu Wen-Bin Zhang Haisen Zhou Jiaxiao Chen Lebin Su Shuo-Qing Zhang Siyuan liu Xu Huang Yi-Zhou Sun Yuxiang Wang Zexi Zhang Zhunzhun Yu Sanzhong Luo Xue-Feng fu Shu-li You Center of Chemistry for Frontier Technologies Department of ChemistryZhejiang UniversityHangzhou 310027China Center of Basic Molecular science Department of ChemistryTsinghua UniversityBeijing 100084China Guangzhou National Laboratory Guangzhou 510005China Center for Quantitative Biology Academy for Advanced Interdisciplinary StudiesPeking UniversityBeijing 100871China State Key Laboratory of Molecular engineering of polymers Department of Macromolecular ScienceFudan UniversityShanghai 200433China School of Materials science and engineering Peking UniversityBeijing 100871China beijing National Laboratory for Molecular sciences Center for Soft Matter Science and EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China AI for science(AI4S)-Preferred Program Shenzhen Graduate SchoolPeking UniversityShenzhen 518055China State Key Laboratory of Chemical Biology Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China department of Chemical sciences National Natural Science Foundation of ChinaBeijing 100085China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

Recent years have witnessed the transformative impact from the integration of artificial intelligence with organic and polymer synthesis. This synergy offers innovative and intelligent solutions to a range of classic problems in synthetic chemistry. These exciting advancements include the prediction of molecular property, multi-step retrosynthetic pathway planning, elucidation of the structure-performance relationship of single-step transformation, establishment of the quantitative linkage between polymer structures and their functions, design and optimization of polymerization process, prediction of the structure and sequence of biological macromolecules, as well as automated and intelligent synthesis platforms. Chemists can now explore synthetic chemistry with unprecedented precision and efficiency, creating novel reactions, catalysts, and polymer materials under the datadriven paradigm. Despite these thrilling developments, the field of artificial intelligence(AI) synthetic chemistry is still in its infancy, facing challenges and limitations in terms of data openness, model interpretability, as well as software and hardware support. This review aims to provide an overview of the current progress, key challenges, and future development suggestions in the interdisciplinary field between AI and synthetic chemistry. It is hoped that this overview will offer readers a comprehensive understanding of this emerging field, inspiring and promoting further scientific research and development.

关键词： organic synthesis polymer synthesis machine learning prediction chemical database automated synthesis

What Can Topology Bring to Chemistry?

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CCS Chemistry 2024年第9期6卷 2084-2109页

作者： Wei Wang Songtao Zhou Xiujun Yu Qing-Hui Guo Yanhang Ma Jie Song liang Zhang Xuzhou Yan Lu Han Qing liao Xiaopeng li Wen-Bin Zhang Yiyong Mai Shaodong Zhang Shunai Che Hai-Bo Yang Xuefeng {3. Mei-Xiang Wang School of Chemistry and Molecular engineering East China Normal UniversityShanghai 200062 Hangzhou Institute of Medicine Chinese Academy of SciencesHangzhou 310022Zhejiang College of Chemistry and Environmental engineering Shenzhen UniversityShenzhen 518060Guangdong MOE Key Laboratory of Bioorganic Phosphorous and Chemical Biology Department of ChemistryTsinghua UniversityBeijing 100084 School of Physical science and Technology and Shanghai Key Laboratory of High-Resolution Electron Microscopy ShanghaiTech UniversityShanghai 201210 School of Chemistry and Chemical engineering Frontiers Science Center for Transformative MoleculesState Key Laboratory of Composite MaterialsShanghai Key Laboratory for Molecular Engineering of Chiral DrugsShanghai Jiao Tong UniversityShanghai 200240 School of Chemical science and engineering Tongji UniversityShanghai 200092 beijing Key Laboratory for Optical Materials and Photonic Devices Department of ChemistryCapital Normal UniversityBeijing 100048 beijing National Laboratory for Molecular sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871 department of Chemical sciences National Natural Science Foundation of ChinaBeijing 10085

The unique mathematical perspectives and principal concepts of topology have not only promoted the development of other branches of mathematics but have also deeply influenced other subjects,particularly physics and *** minireview aims to elucidate the substantial influence of topology on chemistry by critically examining both the contributions of topology to current chemical science and its potential future *** will discuss the topology of molecular structures and assemblies across various scales—from small molecules and mechanically interlocked molecules to {3.s,biomacromolecules,and supramolecular *** discussion will include an exploration of cutting-edge techniques for characterizing topological features,underscoring the role of topology as a novel paradigm for the design and synthesis of new molecular ***,a critical analysis of topology’s role in the development of functional materials—such as photonic materials,{3.s,biomacromolecules,and chiral materials—will demonstrate its emerging significance as a crucial parameter in unveiling novel properties and *** topology’s formidable potential,it is anticipated to be used increasingly to address pivotal challenges within chemistry and adjacent disciplines.

关键词： chemical topology topological invariants molecular graphs links and knots structureproperty relationship

纤维排布对CFRP感应加热固化成型过程影响表征

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北京航空航天大学学报 2024年第1期50卷 198-207页

作者：付天宇杨宁古云飞许家忠蒋悦李斌常州信息职业技术学院智能装备学院常州213164 山西大同大学计算机与网络工程学院大同037009 哈尔滨理工大学机械动力工程学院哈尔滨150080 哈尔滨理工大学自动化学院哈尔滨150080 重庆市特种设备检测研究院重庆401120

在采用电磁感应加热方式实现碳纤维复合材料(CFRP)加热固化成型的过程中,如何准确表征材料各组成部分的属性参数状态对研究材料加热过程中温度、固化度及应力场分布至关重要。根据纤维实际铺层方式对材料各组成部分进行独立表征,以及碳... 详细信息

在采用电磁感应加热方式实现碳纤维复合材料(CFRP)加热固化成型的过程中,如何准确表征材料各组成部分的属性参数状态对研究材料加热过程中温度、固化度及应力场分布至关重要。根据纤维实际铺层方式对材料各组成部分进行独立表征,以及碳纤维壳体的等效电-磁-热特性建立了CFRP感应加热有限元细观分析模型,将纤维织构和树脂基体单独建立,实现CFRP在感应加热过程中其内部纤维织构中物理场的变化规律以及对材料整体升温变化规律进行系统分析。通过该模型计算了材料温度、固化度及应力场分布的变化规律,揭示了碳纤维排布对材料感应加热效果的影响,并根据感应加热实验验证了该模型可以准确表征各物理场的分布状态。为研究CFRP在感应加热中各物理场变化规律提供了有效的计算模型和分析方法。

关键词：碳纤维感应加热温度场固化度应力场

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高分子材料合成技术综合实验教学改革

实验技术与管理 2011年第6期 242-245页

作者：杨光付春娟李松梅宫声凯北京航空航天大学材料科学与工程学院高分子及复合材料系

从现代材料科学与工程的四大要素及其相互关系角度,通过科学的内容设计,对高分子材料合成和制备综合实验的教学内容进行更新和补充,减少原有实验中的验证性内容环节,结合现有的科研条件,增设了设计性、研究性、探索性和创新性的实验内容... 详细信息

从现代材料科学与工程的四大要素及其相互关系角度,通过科学的内容设计,对高分子材料合成和制备综合实验的教学内容进行更新和补充,减少原有实验中的验证性内容环节,结合现有的科研条件,增设了设计性、研究性、探索性和创新性的实验内容,进一步改革和完善高分子材料合成技术实践体系。

关键词：高分子材料合成实验综合实验实验教学改革

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分子半导体改性聚合物复合电介质研究进展

高分子通报 2024年第7期37卷 868-877页

作者：刘芾源佟辉曹诗沫臧丽坤北京科技大学化学与生物工程学院北京100083 中国科学院电工研究所微纳加工技术与智能电气设备研究部北京100190 中国科学院大学工程科学学院北京100049

薄膜电容器因具有功率密度高、损耗低、循环寿命长、安全环保等特点而被广泛应用于智能电网、风力发电、电动汽车、脉冲功率系统等领域。电介质是决定薄膜电容器性能的关键,但材料中的缺陷、杂质等在高温、高电场下产生泄漏电流,使薄膜... 详细信息

薄膜电容器因具有功率密度高、损耗低、循环寿命长、安全环保等特点而被广泛应用于智能电网、风力发电、电动汽车、脉冲功率系统等领域。电介质是决定薄膜电容器性能的关键,但材料中的缺陷、杂质等在高温、高电场下产生泄漏电流,使薄膜电容器的储能性质急剧降低,难以在热、电耦合场下获得高能量密度。向聚合物电介质中引入微量有机分子半导体的改性方式可使电介质中产生能量陷阱捕获载流子、抑制泄漏电流,从而降低电导损耗,提高充放电效率。本文综述了通过向聚合物基体中引入有机分子半导体提升电介质高温储能性质的方法,讨论了有机小分子半导体、聚合物分子半导体改性对储能性质的影响机制,并展望了相关领域未来的发展方向。

关键词：有机小分子半导体聚合物分子半导体复合电介质泄漏电流高温储能