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2D SAXS/WAXD ANALYSIS OF PAN CARBON FIBER MICROSTRUCTURE IN ORGANIC/INORGANIC TRANSFORMATION

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chinese Journal of polymer Science 2013年第5期31卷 823-832页

作者： Cai-zhen Zhu xiao-lan Yu xiao-fang Liu Yun-zen Mao Rui-gang Liu 赵宁 xiao-li Zhang 徐坚 beijing National laboratory for molecular {3. Laboratory of Polymer Physics and ChemistryInstitute of ChemistryChinese Academy of Sciences Shenzhen Key laboratory of Functional polymer College of Chemistry and Chemical EngineeringShenzhen University College of Materials Science and Engineering Donghua University

Structure of PAN fibers during pre-oxidation and carbonization was studied using two dimensional small angle X-ray scattering/wide angle X-ray diffraction （2D SAXS/WAXD）. The SAXS results show that during pre-oxidation between 180 ℃ and 275 ℃, the volume content of microvoids increases with the temperature increasing, which may be one of reasons for the decrease of tensile strength ofpre-oxidized fibers. 253.℃ was the critical transition temperature, the length, diameter, aspect ratio and orientation distribution of microvoids increased with temperature before this temperature and decreased after this temperature. After the high temperature carbonization, lots of spindly microvoids formed. WAXD patterns demonstrate that the crystallite size of PAN fibers first increased before 23. ℃ and then decreased with the increase of temperature during the pre-oxidation. The diffraction peak of PAN fibers at 2θ ≈ 17°almost disappeared at the end of pre- oxidation while the diffraction peak of aromatic structure at 2θ ≈ 25° appeared at 253.℃. During carbonization, the peak intensity at 2θ ≈ 25° increased apparently due to the formation of graphite structure. The results obtained give a deep understanding of the microstrncture development in the PAN fibers during pre-oxidation and carbonization, which is important for the preparation of high performance carbon fibers.

关键词： Polyacrylonitrile Pre-oxidation Carbonization SAXS/WAXD Microstructure.

Melting Temperature of Individual Electrospun Poly(vinylidene fluoride) Fibers Studied by AFM-based Local Thermal Analysis

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chinese Journal of polymer Science 2021年第2期39卷 219-227,I0007页

作者： Ze-Qian Wang zhen-Xing Zhong Yu-Ying Ma xiao-Feng Lu Ce Wang Zhao-Hui Su State Key laboratory of polymer physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Science and Technology of china Hefei 230026China Alan G.MacDiarmid Institute Jilin UniversityChangchun 130012China

Thermal properties such as melting temperature can well reflect the microstructure of the polymer material, and have practical implications in the application of nanofibers. In this work, we investigated the melting temperature of individual electrospun poly(vinylidene fluoride)(PVDF) nanofibers with diameters ranging from smaller than 200 nm to greater than 2 μm by the local thermal analysis technique. The PVDF fibers obtained under four different conditions were found to crystallize into α and β phases, and the fiber mats showed typical values in the crystallinity and Tm with no significant difference among the four. However, analyses at single fiber level revealed broad distribution in diameter and Tm for the fibers produced under identical electrospinning condition. The Tm of individual nanofibers was found to remain constant at large diameters and increase quickly when reducing the fiber diameter toward the nanoscale, and Tm values of 220-23. ℃ were observed for the thinnest nanofibers, much higher than the typical values reported for bulk PVDF. The Tm and molecular orientation at different positions along a beaded fiber were analyzed, showing a similar distribution pattern with a minimum at the bead center and higher values when moving toward both directions. The results indicate that molecular orientation is the driving mechanism for the observed correlation between the Tm and the diameter of the nanofibers.

关键词： Electrospun fibers PVDF Local thermal analysis Melting temperature

New sustainable polymers with on-demand depolymerization property

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Science china Chemistry 2024年第9期67卷 2803-2841页

作者： yangyang Sun Zesheng An Yanshan Gao Rongrong Hu Ye Liu Hua Lu xiao-Bing Lu Xuan Pang Anjun Qin Yong Shen Youhua Tao Yu-Zhong Wang Junpeng Wang Gang Wu Guang-Peng Wu Tie-Qi Xu Xing-Hong Zhang Yuetao Zhang {3.biao Zhang Jian-Bo Zhu Miao Hong Zhibo Li State Key laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China State Key laboratory Base of Eco-Chemical Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao266042China State Key laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China State Key laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou 510640China State Key laboratory of Fine Chemicals Frontiers Science Center for Smart MaterialsDalian University of TechnologyDalian 116024China beijing National laboratory for molecular {3. Center for Soft Matter Science and EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Key laboratory of polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China The Collaborative Innovation center for Eco-Friendly and Fire-Safety polymeric Materials(MoE) National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan)College of ChemistryState Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610064China School of polymer Science and polymer Engineering the University of AkronAkronOH 44325USA MOE Key laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China State and Local Joint Engineering laboratory for Novel Functional polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationSuzhou Key Laboratory of Macromolecular Design and Precision SynthesisCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

To combat the crisis of today's synthetic polymers arising from unsustainable production and disposal,it is essential for the synthetic polymer community to reshape the current polymer industry with sustainable *** an emerging class of sustainable polymers,the development of chemically depolymerizable polymers(CDPs),which can undergo closed-loop depolymerization/repolymerization cycles to reproduce virgin polymers without the loss of properties from recovered monomers,offers an ideal solution to preserve finite natural resources,provides a feasible solution to the end-of-life issue of polymer waste,and thereby establishes a circular materials ***,two grand key challenges have been encountered in the establishment of practically useful CDPs:how to balance polymerization and depolymerization ability and how to unify conflicted depolymerizability and physical ***,this critical review article presents our vision for summarizing feasible strategies to overcome the above two significant challenges and the design principles for constructing an ideal CDP by highlighting selected major progress made in this rapidly expanding field.

关键词： chemically depolymerizable polymers sustainable polymers depolymerization monomer recovery degradation plastics

Recent advance of photochromic diarylethenes-containing supramolecular systems

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chinese Chemical Letters 2015年第7期26卷 817-824页

作者： Chao xiao Wei-Ye Zhao Da-yang Zhou Yan Huang Ye Tao Wan-Hua Wu Cheng yang Key laboratory of Green Chemistry & Technology College of Chemistry State Key Laboratory of Biotherapy West China Medical Center and State Key Laboratory of Polymer Materials Engineering Sichuan University Comprehensive Analysis center ISIR Osaka University BSFR Institute of High Energy Physics Chinese Academy of Sciences

Photochromic diarylethenes were deemed to be one of the most promising molecular building blocks tot photoresponsive materials. This review gives a brief summary to the recent progress of studies of diarylethenes in supramolecular systems, focusing on their applications in biological systems, photoresponsive mechanical materials and photoresponsive chemosensors. ~ 2015 chinese Chemical Society and Institute of Materia Medica, chinese academy of Medical sciences.

关键词： DiarylethenesPhotochromismSupramolecular chemistryStimuli-response

高分子单链键接Fe_3._4制备Janus复合纳米颗粒

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高分子学报 2018年第8期28卷 1066-1072页

作者：井静云姚晓辉杨振忠高分子物理与化学国家重点实验室中国科学院化学研究所北京100190 中国科学院大学北京100049

采用溶剂热法制备油酸保护的Fe_3._4纳米颗粒,通过硅烷配体交换在颗粒表面引入氨基.基于氨基快速淬灭阳离子活性种,将阳离子聚合制备的活性高分子链如聚(4-氯甲基苯乙烯)键接到氨基改性的Fe_3._4纳米颗粒表面,制备高分子链/Fe_3._4复合... 详细信息

采用溶剂热法制备油酸保护的Fe_3._4纳米颗粒,通过硅烷配体交换在颗粒表面引入氨基.基于氨基快速淬灭阳离子活性种,将阳离子聚合制备的活性高分子链如聚(4-氯甲基苯乙烯)键接到氨基改性的Fe_3._4纳米颗粒表面,制备高分子链/Fe_3._4复合纳米颗粒.分子量决定键接活性高分子链数目.当高分子流体力学尺寸大于纳米颗粒直径时,空间排斥效应保证单根高分子链键接到Fe_3._4纳米颗粒(10 nm),得到呈降落伞结构的复合Janus纳米颗粒,高分子链分布在Fe_3._4颗粒一侧.当高分子链尺寸较小时,多根高分子链键接到纳米颗粒表面.研究了该复合Janus纳米颗粒双亲特性.作为固体乳化剂可容易乳化水/油体系得到稳定乳液.该Janus纳米颗粒在油水界面通过自组装可得到单层薄膜.

关键词：纳米颗粒 Fe3.4 聚合物单链 Janus 双亲性

Genome-wide analysis identify novel germline genetic variations in ADCY1 influencing platinum-based chemotherapy response in nonsmall cell lung cancer

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Acta Pharmaceutica Sinica B 2022年第3期12卷 1514-1522页

作者： Chenxue Mao Juan Chen Ting Zou Yuankang Zhou Junyan Liu Xi Li Xiangping Li Min Li Pinhua Pan Wei Zhuo yang Gao Shuo Hu Desheng xiao Lin Wu Zhan Wang Heng Xu Wen yang Yingjie Xu Haihua xiao Kazuhiko Hanada Wei Zhang Honghao Zhou Jiye Yin Zhaoqian Liu Departments of Clinical Pharmacology and Pharmacy Hunan Key Laboratory of Pharmacogeneticsand National Clinical Research Center for Geriatric DisordersXiangya HospitalCentral South UniversityChangsha 410008China Institute of Clinical Pharmacology Engineering Research Center of Applied Technology of PharmacogenomicsMinistry of EducationCentral South UniversityChangsha 410078China Department of Respiratory Xiangya HospitalCentral South UniversityChangsha 410008China Department of Thoracic Surgery Xiangya HospitalCentral South UniversityChangsha 410008China Department of Nuclear Medicine Xiangya HospitalCentral South UniversityChangsha 410008China Department of Pathology Xiangya HospitalCentral South UniversityChangsha 410014China Department of Thoracic Medicine Hunan Cancer HospitalChangsha 410014China Department of Medical Oncology Lung Cancer and Gastrointestinal UnitHunan Cancer HospitalChengdu 610000China State Key laboratory of Biotherapy and Cancer center West China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengdu 610000China Department of molecular and Cellular Biochemistry School of MedicineShanghai Jiaotong UniversityShanghai 200025China beijing National laboratory for molecular {3. State Key Laboratory of Polymer Physics and ChemistryInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Department of Pharmacometrics and Pharmacokinetics Meiji Pharmaceutical University Tokyo 204-8588Japan

To explore the pharmacogenomic markers that affect the platinum-based chemotherapy response in non-small-cell lung carcinoma(NSCLC),we performed a two-cohort of genome-wide association studies(GWAS),including 3. for WES-based and 43. for microarray-based analyses,as well as two independent validation *** integrating the results of two studies,the genetic variations related to the platinum-based chemotherapy response were further determined by fine-mapping in 83. samples,and their potential functional impact were investigated by eQTL analysis and in vitro cell *** found that a total of 68 variations were significant at P3.in cohort 1 discovery stage,of which 3.SNPs were verified in 262 independent samples.A total of541 SNPs were significant at P3.7 independent *** the validated SNPs in two GWAS,ADCY1 gene was verified in both independent *** results of fine-mapping showed that the G allele carriers of ADCY1rs2280496 and C allele carriers of rs189178649 were more likely to be resistant to platinum-based *** conclusion,our study found that rs2280496 and rs189178649 in ADCY1 gene were associated the sensitivity of platinum-based chemotherapy in NSCLC patients.

关键词： Pharmacogenomics NSCLC Platinum GWAS WES ADCY1 Precious medicine SNPs

A Simple Building Block with Noncovalently Conformational Locks towards Constructing Low-Cost and High-Performance Nonfused Ring Electron Acceptors

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chinese Journal of polymer Science 2023年第4期41卷 556-563,I0008页

作者： xiao-Bin Gu Jin-Hua Gao Zi-yang Han Yu-Hao Shi Ya-Nan Wei Yin-Cheng Zhang Qian Peng Zhi-Xiang Wei Xin Zhang Hui Huang College of Materials Science and Opto-Electronic Technology Center of Materials Science and Optoelectronics EngineeringCAS Center for Excellence in Topological Quantum ComputationCAS Key Laboratory of Vacuum PhysicsUniversity of Chinese Academy of SciencesBeijing100049China School of Chemical sciences University of Chinese Academy of SciencesBeijing100049China CAS Key laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China

Nonfused ring electron acceptors(NFREAs)have attracted much attention due to their concise synthetic routes and low ***,developing high-performance NFREAs with simple structure remains a great *** this work,a simple building block(POBT)with noncovalently conformational locks(No CLs)was designed and ***-crystal X-ray study indicated the presence of S…O NOCLs in POBT,thus enabling it to possess a coplanar conformation comparable to that of fused-ring *** novel NFREAs based on CPT and POBT were developed,namely TT-CPT and TT-POBT,***,TT-POBT possessed a smaller Stokes shift and a reduced reorganization energy compared with TT-CPT,indicating the introduction of S…O No CLs can enhance the molecular rigidity even if simplifying the molecular *** a result,the TT-POBT-based PSC device afforded an impressive power conversion efficiency of 11.15%,much higher than that of TT-CPT counterpart(7.03.),mainly resulting from the tighterπ-πstacking,improved and balanced charge transport,and more favorable film *** work demonstrates the potential of the simple building block POBT with No CLs towards constructing low-cost and highperformance NFREAs.

关键词： polymer solar cells Nonfused ring electron acceptors Simple building block Noncovalent conformation locks Reorganization energy

Identification of SARS-CoV-2-against aptamer with high neutralization activity by blocking the RBD domain of spike protein 1

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Signal Transduction and Targeted Therapy 2021年第7期6卷 1985-1988页

作者： Ge yang Ziyue Li Irfan Mohammed Liping Zhao Wei Wei Haihua xiao Weisheng Guo Yongxiang Zhao Feng Qu Yuanyu Huang School of Life Science Advanced Research Institute of Multidisciplinary ScienceInstitute of Engineering MedicineKey Laboratory of Molecular Medicine and BiotherapyBeijing Institute of TechnologyBeijingChina State Key laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijingChina beijing National laboratory for molecular {3. State Key Laboratory of Polymer Physics and ChemistryInstitute of ChemistryChinese Academy of SciencesBeijingChina Translational Medicine center Key Laboratory of Molecular Target&Clinical Pharmacology and the State Key Laboratory of Respiratory DiseaseSchool of Pharmaceutical Sciences&the Second Affiliated HospitalGuangzhou Medical UniversityGuangzhouChina National center for International Research of Biological Targeting Diagnosis and Therapy Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy ResearchGuangxi Medical UniversityNanningGuangxiChina

Dear Editor,The ongoing outbreak of coronavirus disease 2019(COVID-19)caused by severe acute respiratory syndrome coronavirus-2(SARS-CoV-2)poses a great threat to the public health of people and the normal economic and social development around the *** of January 8,2021,more than 88 million people were infected with SARS-CoV-2,resulting in more than 1.9 million death.

关键词： death acute respiratory

Biomedical polymers: synthesis, properties, and applications

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Science china Chemistry 2022年第6期65卷 1010-1075页

作者： Wei-Hai Chen Qi-Wen Chen Qian Chen Chunyan Cui Shun Duan Yongyuan Kang yang Liu Yun Liu Wali Muhammad Shiqun Shao Chengqiang Tang Jinqiang Wang Lei Wang Meng-Hua Xiong Lichen Yin Kuo Zhang Zhanzhan Zhang Xu zhen Jun Feng Changyou Gao zhen Gu Chaoliang He Jian Ji Xiqun Jiang Wenguang Liu Zhuang Liu Huisheng Peng Youqing Shen Linqi Shi Xuemei Sun Hao Wang Jun Wang Haihua {3. Fu-Jian Xu Zhiyuan Zhong Xian-zheng Zhang Xuesi Chen Key laboratory of Biomedical polymers of Ministry of Education&Department of Chemistry Wuhan UniversityWuhan430072China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin300350China Key laboratory of Biomedical Materials of Natural Macromolecules(beijing University of Chemical Technology) Ministry of EducationBeijing Laboratory of Biomedical MaterialsCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China MOE Key laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou310027China State Key laboratory of Medicinal Chemical Biology Key Laboratory of Functional Polymer Materials of Ministry of EducationCollege of ChemistryNankai UniversityTianjin300071China Key laboratory of Advanced Drug Delivery Systems of Zhejiang Province College of Pharmaceutical SciencesZhejiang UniversityHangzhou310058China Jinhua Institute of Zhejiang University Jinhua321299China Zhejiang Key laboratory of Smart BioMaterials and center for Bionanoengineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310027China ZJU-Hangzhou Global Scientific and Technological Innovation center Hangzhou311215China State Key laboratory of molecular Engineering of polymers Department of Macromolecular Science and Laboratory of Advanced MaterialsFudan UniversityShanghai200438China CAS Key laboratory for Biomedical Effects of Nanomaterials and Nanosafety CAS Center for Excellence in Nano-scienceNational Center for Nanoscience and Technology(NCNST)Beijing100190China School of Biomedical sciences and Engineering Guangzhou International CampusSouth China University of TechnologyGuangzhou510006China Institute of Functional Nano and So

Biomedical polymers have been extensively developed for promising applications in a lot of biomedical fields, such as therapeutic medicine delivery, disease detection and diagnosis, biosensing, regenerative medicine, and disease treatment. In this review, we summarize the most recent advances in the synthesis and application of biomedical polymers, and discuss the comprehensive understanding of their property-function relationship for corresponding biomedical applications. In particular, a few burgeoning bioactive polymers, such as peptide/biomembrane/microorganism/cell-based biomedical polymers, are also introduced and highlighted as the emerging biomaterials for cancer precision therapy. Furthermore, the foreseeable challenges and outlook of the development of more efficient, healthier and safer biomedical polymers are discussed. We wish this systemic and comprehensive review on highlighting frontier progress of biomedical polymers could inspire and promote new breakthrough in fundamental research and clinical translation.

关键词： biomedical polymer nanomedicine cancer therapy drug delivery bioimaging and biosensing tissue engineering regenerative medicine cytotoxicity biocompatibility