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Electrical breakdown of an acrylic dielectric elastomer: effects of hemispherical probing electrode’s size and force

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International Journal of Smart and Nano Materials 2015年第4期6卷 290-303页

作者： Bin Chen Matthias Kollosche Mark Stewart James Busfield federico carpi School of Engineering and Materials Science Queen Mary University of LondonLondonUK Materials Division National Physical LaboratoryTeddingtonUK Institute of Physics and Astronomy University of PotsdamPotsdamGermany

Dielectric elastomers are widely investigated as soft electromechanically active polymers(EAPs)for actuators,stretch/force sensors,and mechanical energy harvesters to generate *** the performance of such devices is limited by the dielectric strength of the constitutive material,the electrical breakdown of soft elastomers for electromechanical transduction is still scarcely ***,we describe a custom-made setup to measure electrical breakdown of soft EAPs,and we present data for a widely studied acrylic elastomer(VHB 4905 from 3M).The elastomer was electrically stimulated via a planar and a hemispherical metal *** breakdown was characterized under different conditions to investigate the effects of the radius of curvature and applied force of the hemispherical *** a given radius of curvature,the breakdown field increased by about 50% for a nearly 10-fold increase of the applied mechanical stress,while with a given mechanical stress the breakdown field increased by about 20% for an approximately two fold increase of the radius of *** results indicate that the breakdown field is highly dependent on the boundary conditions,suggesting the need for reporting breakdown data always in close association with the measurement *** findings might help future investigations in elucidating the ultimate breakdown mechanism/s of soft elastomers.

关键词： actuator EAP electromechanically active polymer dielectric elastomer dielectric strength electric breakdown hemispherical electrode curvature force

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欧洲儿科胃肠病学、肝病学和营养协会儿童及青少年炎症性肠病诊断的改良波尔图标准(2014年版)

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中华儿科杂志 2016年第10期54卷 728-732页

作者： Arie Levine Sibylle Koletzko Dan Turner Johanna C.Escher Salvatore Cucchiara Lissy de Ridder Kaija-Leena Kolho Gabor Veres Richard K.Russell Anders Paerregaard Stephan Buderus Mary-Louise C.Greer Jorge A.Dias Gigi Veereman-Wauters Paolo Lionetti Malgorzata Sladek Javier Martin de carpi Annamaria Staiano Frank M.Ruemmele David C.Wilson 罗优优陈洁 Pediatric Gastroenterology and Nutrition Unit Wolfson Medical CenterSackler School of MedicineTel-Aviv University the Dr von Hauner Children's Hospital Ludwig Maximilians University the Pediatric Gastroenterology Unit Shaare Zedek Medical CenterThe Hebrew University of Jerusalem the Pediatric Gastroenterology Department of PediatricsErasmus MC-Sophia Children's Hospital 5. the Pediatric Gastroenterology and Liver UnitSapienza University of Rome 6. the Children's HospitalUniversity of Helsinki 7. the Semmelweis University 8. the Department of Paediatric Gastroenterology and NutritionYorkhill Children's Hospital 9. the Department of PaediatricsHvidovre University Hospital 10. the St.Marien-HospitalDepartment of Pediatrics 11. the Department of Diagnostic ImagingThe Hospital for Sick Childrenthe Department of Medical ImagingUniversity of Toronto 12. the Hospital S.Joao 13. the-Pediatric Gastroenterology and Nutrition 14. the Departement NeurofarbaUniversity of FlorenceMeyer Children Hospital 15. the Department of PediatricsGastroenterology and NutritionJagiellonian University Medical College 16. the Department of Pediatric GastroenterologyHepatology and NutritionHospital Sant Joan de De'u 17. the Department of Translational Medical SciencesSection of PediatricsUniversit

炎症性肠病(IBD)包括克罗恩病(CD)、溃疡性结肠炎(UC)和未分型IBD(IBDU)。IBD的确切诊断需综合病史、体检、实验室检查、内镜以及影像学的检查,并严格排除肠道感染、过敏性疾病或原发性免疫缺陷病(PID)。近年对儿童期起病的IBD(PIBD)的... 详细信息

炎症性肠病(IBD)包括克罗恩病(CD)、溃疡性结肠炎(UC)和未分型IBD(IBDU)。IBD的确切诊断需综合病史、体检、实验室检查、内镜以及影像学的检查,并严格排除肠道感染、过敏性疾病或原发性免疫缺陷病(PID)。近年对儿童期起病的IBD(PIBD)的研究高度提示3种PIBD的亚型均存在不典型的表型。本标准对2005年波尔图标准进行改良,利用循证方法,整合最新证据,包括诊断方法、以巴黎分型为基础的PIBD亚型的定义以及诊断误区,为新一代的PIBD提供优质的个体化管理以及可靠的诊断、评估和预后。

关键词：体检实验室检查内镜

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