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A review of helical carbon materials structure,synthesis and applications

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Rare Metals 2021年第1期40卷 3-19页

作者： Ding-Chuan Wang Yu Lei Wei Jiao Yi-Fan Liu Chun-Hong Mu Xian Jian School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China School of Public Affairs and Law Southwest Jiaotong UniversityChengdu 610031China National Engineering Research Center of Electromagnetic Radiation Control Materials State Key Laboratory of Electronic Thin Films and Integrated DevicesUniversity of Electronic Science and Technology of ChinaChengdu 610054China

The helical structures possess unique physical and chemical properties,such as superelasticity,high specific strength,chirality,and electromagnetic cross-polarization characteristics.With the development of nanoscience and nanotechnology,helical structures with various scales have been discovered or synthesized artificially.Among them,the helical carbon materials receive much attention around the world.Herein,we present a brief review of the development of helical carbon materials in terms of structures,synthesis techniques and mechanisms,and applications.The controllable designing of catalysts,carbon sources and reaction parameters plays a key role to optimize the properties of the helical carbon materials.At the same time,the applications in microwave absorption devices,sensors,catalysts,energy conversions and storage devices,and solar cell are also presented.For the good chemical and physical properties,helical carbon materials have a good application prospect in many fields.The potential issues and future opportunities of the helical carbon materials are also proposed.

关键词： Helical carbon materials COIL Synthesis mechanisms Applications

Central retinal artery occlusion after endovascular COIL embolization for internal carotid artery aneurysm

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International Journal of Ophthalmology(English edition) 2019年第3期12卷 520-522页

作者： Ying-Li Wang Yan-Nian Hui Ran Chen Yang-Yang Jin Jun Tao Yu-Mei Zhou Department of Ophthalmology Meitan General Hospital Department of Ophthalmology Xijing Hospital Fourth Military Medical University

Dear Editor,We are writing this letter to report an unexpected rare caseofcentralretinalarteryocclusion(CRAO)happened after stent-assisted COILing for internal carotid artery(ICA)aneurysm in a female patient.CRAO is a devastating ocular emergency with poor visual prognosis and no universal acceptedtreatmentatpresent.CRAOisusuallyassociated witharterialhypertension,diabetesmellitus,renaldisease.

关键词： Figure Central retinal artery occlusion after endovascular COIL embolization for internal carotid artery aneurysm ICA FFA

Inferior pancreaticoduodenal artery pseudoaneurysm in a patient with calculous cholecystitis: A case report

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World Journal of Clinical Cases 2019年第18期7卷 2851-2856页

作者： Qiao-Dong Xu Song-Gang Gu Jia-Hong Liang Shao-Dong Zheng Zhi-Hua Lin Pei-Dong Zhang Jiang Yan Department of Biliary-Pancreatic Minimally Invasive Surgery The First Affiliated Hospital of Shantou University Medical College

BACKGROUND Pancreaticoduodenal artery (PDA) aneurysms are extremely rare. The complicated clinical presentations and high incidence of rupture make it difficult to diagnose and treat. PDA pseudoaneurysms often rupture into the gastrointestinal tract and result in life-threatening gastrointestinal hemorrhage. CASE SUMMARY A 69-year-old man was admitted to our hospital due to right upward abdominal pain. A computed tomography (CT) scan demonstrated acute cholecystitis and cholecystolithiasis. Percutaneous gallbladder drainage was performed subsequently. He was discharged after 3 d and readmitted to hospital for cholecystectomy as arranged 1 mo later. A repeat CT scan revealed an emerging enhancing mass between the pancreatic head and the descending duodenum. Then, he suffered hematochezia and hemorrhagic shock suddenly. Emergency percutaneous angiogram was performed and selective catheterization of the superior mesenteric artery demonstrated a pseudoaneurysm in the inferior PDA. COIL embolization was performed and his clinical condition improved quickly after embolization and blood transfusion. He underwent laparoscopic cholecystectomy and was discharged from hospital after surgery under satisfactory conditions. CONCLUSION PDA pseudoaneurysms are uncommon. Acute haemorrhage is a severe complication of pseudoaneurysm with high mortality which clinicians should pay attention to.

关键词： Calculous cholecystitis Inferior pancreaticoduodenal artery pseudoaneurysm Gastrointestinal haemorrhage COIL embolization Case report

COIL-rod-COIL刚柔嵌段共聚物在选择性溶剂中的自组装

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高分子学报 2014年第4期24卷 514-522页

作者：陈增磊何林李温州大学物理与电子信息工程学院温州325035

采用耗散粒子动力学方法(dissipative particle dynamics,DPD)研究了COIL-rod-COIL(CRC)三嵌段刚柔共聚物在选择性溶剂中的自组装.在链选择性溶剂中,刚性棒长Lr与柔性链长Lc都影响着CRC溶液的自组装及相转变.随Lr的增大,棒与溶剂的接触... 详细信息

采用耗散粒子动力学方法(dissipative particle dynamics,DPD)研究了COIL-rod-COIL(CRC)三嵌段刚柔共聚物在选择性溶剂中的自组装.在链选择性溶剂中,刚性棒长Lr与柔性链长Lc都影响着CRC溶液的自组装及相转变.随Lr的增大,棒与溶剂的接触面变大界面能升高,为减小体系的自由能,棒嵌段趋向聚集以减少接触面与界面能.随Lc的增大,链的自由伸展构象熵增大,影响着棒嵌段聚集体结构的形成,使棒嵌段的分布更加分散.在研究溶剂性质aCS与棒长Lr对体系自组装影响的情况中,观察到两类有趣的相结构:球形相和胶束相.随着参数aCS从亲链变为中性再到亲棒,在球形相内部,不仅棒相区由球体内部移向球表面,而且棒相区与链相区的层次分布也发生了明显地变化.同样,Lr的改变也影响着球形相内部相区的分布,同时诱导了不同球形相间的构型转变.胶束相包括分段胶束和螺旋胶束两种,形成于棒长较长的情况,胶束相中棒嵌段的排列呈现出明显的液晶相结构.

关键词：耗散粒子动力学 COIL—Rod COIL 选择性溶剂自组装界面能

Reconstructive treatment of symptomatic vertebral artery dissecting aneurysms with Willis covered stent: Initial experience

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Journal of Interventional Medicine 2020年第4期3卷 184-191页

作者： Yi Gu Li Chen Yang Zhang Mo Chen YongDong Li YueQi Zhu HaiTao Lu LiMing Wei PeiLei Zhang MinHua Li BinXian Gu Jin You Wu Wang Institute of Diagnostic and Interventional Radiology Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai200233China Zhejiang Shin-an International Hospital 314031China

Background:Symptomatic vertebral artery dissecting aneurysm(VADA)is a challenging disease with controversy on treatment strategy due to anatomic configuration and their nature.Moreover,the outcomes of reconstructive treatment have not been well established.Objective:To evaluate the safety and efficacy of reconstructive endovascular treatment(EVT)for symptomatic VADAs with Willis covered stent.Methods:We evaluated retrospectively 13 patients with symptomatic VADAs who treated with Willis covered stent,compared with stent-assisted COILing(SAC)on the characteristics,posttreatment course,angiographic and clinical follow-up outcomes at an average of 14.4 months(range,3-48 months).Results:A total of 33 patients with symptomatic VADAs were reviewed,23 of these patients with ruptured VADAs.The technical successful rate is 100%respectively in Willis covered stent(Group A)and SAC(Group B,n=20).The initial complete occlusion rate was significant higher in group A(100%)than group B(30%)(p0.05).No obvious in-stent stenosis and no re-hemorrhage and delayed ischemic symptoms during the follow-up period.The final angiograms of all survived patients demonstrated the complete occlusion rate was higher in group A(100%)than group B(80%),but no significant statistical difference(p>0.05).Clinical outcomes were favorable in 31(93.9%),severe disability occurred in one in group B,and only one death in group A.The final clinical outcomes were also not significant difference in the two groups(p>0.05).Conclusions:Our initial result demonstrated reconstructive EVT with Willis covered stent provides a viable approach for selected symptomatic VADAs involving the intracranial and extracranial segments,which is similar to favorable results with SAC.However,an expanded clinical experiences and larger cohort studies are needed.

关键词： Vertebral artery dissecting aneurysm Endovascular treatment Willis covered stent Stent COIL

Simulation and Analysis of Electromagnetic Force in Laser Melting Deposition by Electromagnetic Impact

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Transactions of Nanjing University of Aeronautics and Astronautics 2018年第4期35卷 702-709页

作者： Xie Na Zhao Jianfeng Xie Deqiao Sun Jie Tian Zongjun Shen Lida College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics

Magnetic field was introduced in laser melting deposition to reduce the pores in workpieces.Finite 3-D model of the COIL-deposition layer-substrate was established.Simulation results show that the electromagnetic force in deposition layer mainly concentrates in the projection area of the COIL.Axial electromagnetic force shows repulsion in one cycle.The experimental results indicate that the magnetic field is beneficial for grain refinement,microhardness increasement and decline of quantities and average sizes of pores.

关键词： laser melting deposition(LMD) finite element method electromagnetic force COIL microstructure

Nano-hydroxyapatite formation via co-precipitation with chitosan-g-poly（N-isopropylacrylamide） in COIL and globule states for tissue engineering application

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Frontiers of Chemical Science and Engineering 2013年第4期7卷 388-400页

作者： Yang YU Hong ZHANG Hong SUN Dandan XING Fanglian YAO School of Chemical Engineering and Technology Key Laboratory of Systems Bioengineering of Ministry of Education Tianjin University Tianjin 300072 China Consolidated Research Institute for Advanced Science and Medical Care Waseda University (ASMeW) Shinjuku-ku Tokyo 162-0041 Japan Basic Medical College Hebei United University Tangshan 063000 China

With the excellent biocompatibility and osteo- conductivity, nano-hydroxyapatite （nHA） has shown significant prospect in the biomedical applications. Con- trolling the size, crystallinity and surface properties of nHA crystals is a critical challenge in the design of HA based biomaterials. With the graft copolymer of chitosan and poly（N-isopropylacrylamide） in COIL and globule states as a template respectively, a novel composite from chitosan-g-poly（N-isopropylacrylamide） and nano-hydro- xyapatite （CS-g-PNIPAM/nHA） was prepared via co- precipitation. Zeta potential analysis, thermogravimetric analysis and X-ray diffraction were used to identify the formation mechanism of the CS-g-PNIPAM/nHA compo- site and its morphology was observed by transmission electron microscopy. The results suggested that the physical aggregation states of the template polymer could induce or control the size, crystallinity and morphology of HA crystals in the CS-g-PNIPAM/nHA composite. The CS-g-PNIPAM/nHA composite was then introduced to chitosan-gelatin （CS-Gel） polyelectronic complex and the cytocompatibility of the resulting CS- Gel/composite hybrid film was evaluated. This hybrid film was proved to be favorable for the proliferation of MC 3T3-E1 cells. Therefore, the CS-g-PNIPAM/nHA compo- site is a potential biomaterial in bone tissue engineering.

关键词： chitosan poly（N-isopropylacrylamide）,hydroxyapatite COIL globule bone tissue engineering

Endovascular treatment of intracranial aneurysms using COIL embolization plus an Enterprise stent

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Chinese Medical Journal 2011年第4期124卷 611-614页

作者： XU Xiang SHANG Xiao-ming CUI Jian-zhong WANG Da-yong Department of Neurosurgery Tangshan Gongren Hospital Tangshan Hebei 063000 China Department of Cardiology Tangshan Gongren Hospital Tangshan Hebei 063000 China Department of Neurosurgery Tangshan Gongren Hospital Tangshan Hebei 063000 China

Background Several difficulties can arise from wide-neck cerebral aneurysms when treated with endovascular embolization. We aimed to investigate the effect of endovascular treatment of intracranial aneurysms using COIL embolization plus an Enterprise stent.Methods Forty patients were treated with COIL embolization plus an Enterprise stent between December 2008 and June 2010.Results The mortality of patients was 0. All stents were successfully implanted without any surgery-related complication.Conclusion The Enterprise stent has some advantages to be selected.

关键词： endovascular procedures aneurysm COIL stents

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流量配比对COIL增益分布影响的数值研究

计算物理 2009年第4期26卷 541-547页

作者：吕俊明王春姜宗林 LHD 中国科学院力学研究所北京100080

利用三维CFD技术,通过求解层流Navier-Stokes方程与组分输运方程,对简化后的化学氧碘激光RADICL模型进行数值模拟与分析,结合10种组分和21个基元反应的化学反应模型,对COIL亚声速段横向射流情况下,不同的主副流流量配比对化学氧碘激光... 详细信息

利用三维CFD技术,通过求解层流Navier-Stokes方程与组分输运方程,对简化后的化学氧碘激光RADICL模型进行数值模拟与分析,结合10种组分和21个基元反应的化学反应模型,对COIL亚声速段横向射流情况下,不同的主副流流量配比对化学氧碘激光器性能的影响进行分析与比较.结果证明,过高或过低的碘分子浓度状态均不利于合理、可观的小信号增益系数产生.存在一个最佳流量配比范围,与之对应的工作状态下,COIL的小信号增益系数会得到显著提高.

关键词： COIL 横向射流流量配比增益系数