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5th Anniversary Article: A Lesson from Plants: High-Speed Soft Robotic Actuators (Adv. Sci. 5/2020)

Advanced science 2020年第5期7卷 2070024-2070024页

作者： Richard Baumgartner Alexander Kogler Josef M. Stadlbauer Choon Chiang Foo Rainer Kaltseis Melanie Baumgartner Guoyong Mao Christoph Keplinger Soo Jin Adrian Koh Nikita Arnold Zhigang Suo Martin Kaltenbrunner Siegfried Bauer Soft Matter Physics Institute of Experimental Physics Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria Soft Materials Lab Linz Institute of Technology LIT Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria Institute of High Performance Computing A*STAR 1 Fusionopolis Way #16-16 Connexis Singapore 138632 Singapore Institute of Polymer Science Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria Department of Mechanical Engineering University of Colorado Boulder Boulder CO 80309 USA Materials Science and Engineering Program University of Colorado Boulder Boulder CO 80303 USA Department of Mechanical Engineering National University of Singapore Singapore 117575 Singapore John A Paulson School of Engineering and Applied Sciences Harvard University 29 Oxford Street Cambridge MA 02138 USA

Explosion of ping‐pong balls that is caused by the rapid inflation of an elastomer membrane. The illustrated ultrafast actuation is based on a plant‐inspired mechanical instability that occurs in natural rubber and can be remotely triggered, presented in article number https://***/10.1002/advs.201903391 by Martin Kaltenbrunner and co‐workers. These new types of high‐speed soft actuators have potential applications in object sorting or grasping.

关键词： bioinspired dielectric elastomer actuators coupled dielectric elastomer balloons snap-buckling snap-through instabilities soft robotics for high-speed actuation

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Ion Specificity on Electric Energy Generated by Flowing Water Droplets

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Angewandte Chemie 2017年第8期130卷

作者： Junwoo Park Suhwan Song ChaeHo Shin YoungJun Yang Stefan A. L. Weber Eunji Sim Youn Sang Kim Program in Nano Science and Technology Graduate School of Convergence Science and Technology Seoul National University Seoul 08826 Republic of Korea Department of Chemistry Yonsei University 50 Yonsei-ro Seodaemun-gu Seoul 03722 Korea Division of Industrial Metrology Korea Research Institute of Standards and Science Daejeon 34113 Republic of Korea Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany Institute of Physics Johannes Gutenberg University Mainz Duesbergweg 10–14 55128 Mainz Germany Advanced Institutes of Convergence Technology 864-1 Iui-dong Yeongtong-gu Suwon-si Gyeonggi-do 16229 Republic of Korea

The development of energy‐conversion devices using water movement has actively progressed. Ionovoltaic devices, which are driven by ion dynamics, show ion specificity by which different ions with identical charges show different output performance. However, the ion specificity remains poorly understood because the influence of the ion species on generated electric signals is not elucidated. The ion specificity in electric signals induced by flowing water droplet was investigated in terms of its relationship with the potential profile across the solid–liquid interface.

关键词： Energieumwandlung Fest-flüssig-Grenzflächen Ionenspezifität Ionovoltaische Funktionseinheiten

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26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 Antwerp, Belgium. 15-20 July 2017 Abstracts

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BMC NEUROscience 2017年第SUPPL 1期18卷 95-176页

作者： [Anonymous] Department of Neuroscience Yale University New Haven CT 06520 USA Department Physiology & Pharmacology SUNY Downstate Brooklyn NY 11203 USA NYU School of Engineering 6 MetroTech Center Brooklyn NY 11201 USA Departament de Matemàtica Aplicada Universitat Politècnica de Catalunya Barcelona 08028 Spain Institut de Neurobiologie de la Méditerrannée (INMED) INSERM UMR901 Aix-Marseille Univ Marseille France Center of Neural Science New York University New York NY USA Aix-Marseille Univ INSERM INS Inst Neurosci Syst Marseille France Laboratoire de Physique Théorique et Modélisation CNRS UMR 8089 Université de Cergy-Pontoise 95300 Cergy-Pontoise Cedex France Department of Mathematics and Computer Science ENSAT Abdelmalek Essaadi’s University Tangier Morocco Laboratory of Natural Computation Department of Information and Electrical Engineering and Applied Mathematics University of Salerno 84084 Fisciano SA Italy Department of Medicine University of Salerno 84083 Lancusi SA Italy Dipartimento di Fisica Università degli Studi Aldo Moro Bari and INFN Sezione Di Bari Italy Data Analysis Department Ghent University Ghent Belgium Coma Science Group University of Liège Liège Belgium Cruces Hospital and Ikerbasque Research Center Bilbao Spain BIOtech Department of Industrial Engineering University of Trento and IRCS-PAT FBK 38010 Trento Italy Department of Data Analysis Ghent University Ghent 9000 Belgium The Wellcome Trust Centre for Neuroimaging University College London London WC1N 3BG UK Department of Electronic Engineering NED University of Engineering and Technology Karachi Pakistan Blue Brain Project École Polytechnique Fédérale de Lausanne Lausanne Switzerland Departement of Mathematics Swansea University Swansea Wales UK Laboratory for Topology and Neuroscience at the Brain Mind Institute École polytechnique fédérale de Lausanne Lausanne Switzerland Institute of Mathematics University of Aberdeen Aberdeen Scotland UK Department of Integrativ

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Chemical changes in polyetherimide (PEI) joined by friction-based injection clinching joining (F-ICJ) technique

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AIP Conference Proceedings 2016年第1期1779卷

作者： M. Sônego A. B. Abibe J. F. dos Santos L. B. Canto S. T. Amancio-Filho 1Graduate Program in Materials Science and Engineering (PPG-CEM) Federal University of São Carlos (UFSCar) São Carlos SP Brazil 2Helmholtz-Zentrum Geesthacht Centre for Materials and Coastal Research Institute of Materials Research Materials Mechanics Solid State Joining Processes Geesthacht Germany 3Hamburg University of Technology Institute of Polymer Composites Hamburg Germany

The study of new joining technologies for multimaterial structures is motivated by the environmental friendly policy of weight reduction in the automotive industry. Friction-based Injection Clinching Joining (F-ICJ) (European Patent Application EP 14182938.2) is a new staking-based joining technique, which uses frictional heating to produce joints in an energy-efficient and fast manner. In F-ICJ a non-consumable tool applies friction and force to soften or melt and deform a polymeric stud fitted in a through hole of a joining partner. After consolidation, the deformed stud (stake) mechanically joins the partners by creating a staked joint. The thermomechanical process exposes the polymer to high temperatures (250 - 290°C) and deformation rates resulting from the combination of tool rotational speeds of 8000-12000 rpm and short joining cycles (5-10 seconds). Resulting changes in material properties can affect the global performance of the joints. This study aims to investigate the chemical changes occurred in the polymeric partner of hybrid joints on polyetherimide (PEI) and aluminum 6082-T6. Molecular weight distribution (Size-Exclusion Chromatography - SEC) and chemical structure (Fourier transform infrared spectroscopy – FTIR) analyses were performed on the base material and PEI extracted from a joint to evidence any possible chemical changes caused by frictional heating. The polymeric sample from the joint showed number-average molecular weight (Mn) 23% smaller and weight-average molecular weight (Mw) 15% smaller than the PEI base material. FTIR spectra show reduction in the intensity of phthalimide bands owing to the F-ICJ process. Therefore, these analyses identified the extension of chain scission in the PEI caused by shear and heat imposed by F-ICJ process, which are fundamental for process optimization.

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The Effect of Organoclay on Curing Characteristic, Mechanical Properties, Swelling and Morphology of Natural Rubber/Organoclay Nanocomposites

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Macromolecular Symposia 2015年第1期353卷

作者： M. Irfan Fathurrohman Bambang Soegijono Emil Budianto Saeful Rohman Arief Ramadhan Indonesian Rubber Research Institute Jl. Salak No. 1 Bogor 16151 Indonesia Materials Science Graduate Program University of Indonesia Jl. Salemba no. 4 Jakarta Indonesia Centre of Polymer Technology Puspiptek Serpong Tangerang Selatan Indonesia

Rubber nanocomposites based on the natural rubber (NR) and organically modified montmorillonite (OMMT) were prepared by melt intercalation technique using a laboratory open mill followed by compression molding. Organically modified organoclays with different d-spacing were added to the natural rubber matrix to examine the influence of d-spacing of organoclay on morphology, curing characteristic and mechanical property of nanocomposite. The characterizations were carried out by means of X-ray diffraction, scanning electron, atomic force microscopy and moving die rheometer. The results show that melt mixing by an open mill is an effective method for dispersing OMMT throughout the natural rubber matrix especially for organoclay cloisite 15A whose d-spacing is high and well dispersed in natural rubber matrix. The hardness and stresses at low strain of NR/organoclay nanocomposites slightly increased with increasing d-spacing of organoclay, but elongation at break decreased. The swelling behavior of NR/organoclay nanocomposite improved with increasing d-spacing of organoclay.

关键词： nanocomposite natural rubber organoclay

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Grafting of maleic anhydride onto deproteinized natural rubber via differential microemulsion polymerization

Grafting of maleic anhydride onto deproteinized natural rubb...

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CAN 2012 11th International Conference on Advances and Trends in Engineering Materials and Their Applications, AES-ATEMA 2012

作者： Wongthong, Pinyo Nakason, Charoen Pan, Qinmin Rempel, Garry L. Kiatkamjornwong, Suda Program in Petrochemistry Chulalongkorn University Bangkok 10330 Thailand Dept. of Rubber Technology and Polymer Science Prince of Songkla University Pattani 94000 Thailand Dept. of Chemical Engineering Soochow University Suzhou 215123 Jiangsu China Dept. of Chemical Engineering University of Waterloo Waterloo ON N2L3G1 Canada Dept. of Imaging and Printing Technology Chulalongkorn University Bangkok 10330 Thailand Division of Science Royal Institute of Thailand Sanam Suepa Dusit Bangkok 10300 Thailand

ISBN: (纸本)9780987994523

The graft copolymerization of maleic anhydride (MA) onto deproteinized natural rubber (DPNR) was performed by differential microemulsion polymerization. The chemical structure of the graft copolymer was characterized by Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopies. The influences of the monomer and initiator concentrations, reaction temperature, and reaction time on the grafting efficiency and gel fraction were elucidated. It was found that the grafting efficiency increases with increasing the amount of the initiator. High grafting efficiency at high reaction temperature was observed. The grafting efficiency was found to be more than 90% under the best condition for the graft copolymerization at 10 phr of MA and 7 phr of benzoyl peroxide at 80 °C for 8 h. However, low gel fraction was found at low reaction temperature (60 °C). Thermal properties of the grafted natural rubber were also investigated. The graft copolymer in this work shall be used as a blend compatibilizer for blending of natural rubber and thermoplastic to produce thermoplastic elastomers in our future work. © 2012, Advanced Engineering Solutions.

关键词： Chemical modification

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Synthesis and properties of poly(1-naphthylacetylene) and poly(9-anthrylacetylene)

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Journal of polymer science 2000年第3期37卷

作者： Kazunari Nanjo S. M. Abdul Karim Ryoji Nomura Tatsuo Wada Hiroyuki Sasabe Toshio Masuda Department of Polymer Chemistry Kyoto University Kyoto 606-8501 Japan Core Research for Evolutional Science and Technology (CREST) JST and Frontier Research Program The Institute of Physical and Chemical Research (RIKEN) 2-1 Hirosawa Wako Saitama 351-0198 Japan

polymerizations of 1-naphthylacetylene (1-NA) and 9-anthrylacetylene (9-AA) by various transition metal catalysts were studied, and properties of the polymers were clarified. 1-NA polymerized with WCl 6 -based catalysts to offer dark purple polymers in good yield. Especially, a binary catalyst composed of WCl 6 and Ph 3 Bi gave a polymer with high molecular weight ( M w = 140×10 3 ) and sufficient solubility in common solvents. The use of Mo and Rh catalysts, in contrast, resulted in the formation of insoluble red poly(1-NA)s. 9-AA gave insoluble polymers by both WCl 6 - and MoCl 5 -based catalysts in moderate to good yields. Copolymerization of 9-AA with 1-NA by WCl 6 –Ph 3 Bi provided a soluble copolymer which exhibited the largest third-order nonlinear optical susceptibilities (χ (3) (−3ω; ω, ω, ω) = 40×10 −12 ) among all the substituted polyacetylenes synthesized so far. © 1999 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 37: 277–282, 1999

关键词： metathesis polymerization poly(arylacetylene) conjugated polymer tungsten catalyst molybdenum catalyst nonlinear optical property

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Contributory presentations/posters

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Journal of Biosciences 1999年第1期24卷 33-198页

作者： N. Manoj V. R. Srinivas A. Surolia M. Vijayan K. Suguna R. Ravishankar R. Schwarzenbacher K. Zeth Diederichs G. M. Kostner A. Gries P. Laggner R. Prassl Madhusudan Pearl Akamine Nguyen-huu Xuong Susan S. Taylor M. Bidva Sagar K. Saikrishnan S. Roy K. Purnapatre P. Handa U. Varshney B. K. Biswal N. Sukumar J. K. Mohana Rao A. Johnson Vasantha Pattabhi S. Sri Krishna Mira Sastri H. S. Savithri M. R. N. Murthy Bindu Pillai Kannan M. V. Hosur Mukesh Kumar Swati Patwardhan K. K. Kannan B. Padmanabhaa S. Sasaki-Sugio M. Nukaga T. Matsuzaki S. Karthikevan S. Sharma A. K. Sharma M. Paramasivam P. Kumar J. A. Khan S. Yadav A. Srinivasan T. P. Singh S. Gourinath Neelima Alam A. Srintvasan Vikas Chandra Punit Kaur Ch. Betzel S. Ghosh A. K. Bera S. Bhattacharya S. Chakraborty A. K. Pal B. P. Mukhopadhyay I. Dey U. Haldar Asok Baneriee Jozef Sevcik Adriana Solovicova K. Sekar M. Sundaralingam N. Genov Dong-cai Liang Tao Jiang Ji-ping Zhang Wen-rui Chang Wolfgang Jahnke Marcel Blommers S. C. Panchal R. V. Hosur Bindu Pillay Puniti Mathur S. Srivatsun Ratan Mani Joshi N. R. Jaganathan V. S. Chauhan H. S. Atreya S. C. Sahu K. V. R. Chary Girjesh Govil Elisabeth Adjadj Éric Quinjou Nadia Izadi-Pruneyre Yves Blouquit Joël Mispelter Bernadette Heyd Guilhem Lerat Philippe Milnard Michel Desmadreil Y. Lin B. D. Nageswara Rao Vidva Raghunathan Mei H. Chau Prashant Pesais Sudha Srivastava Evans Coutinho Anil Saran Leizl F. Sapico Jayson Gesme Herbert Lijima Raymond Paxton Thamarapu Srikrishnan C. R. Grace G. Nagenagowda A. M. Lynn Sudha M. Cowsik Sarata C. Sahu S. Chauhan A. Bhattacharya G. Govil Anil Kumar Maurizio Pellecchia Erik R. P. Zuiderweg Keiichi Kawano Tomoyasu Aizawa Naoki Fujitani Yoichi Hayakawa Atsushi Ohnishi Tadayasu Ohkubo Yasuhiro Kumaki Kunio Hikichi Katsutoshi Nitta V. Rani Parvathy R. M. Kini Takumi Koshiba Yoshihiro Kobashigawa Min Yao Makoto Demura Astushi Nakagawa Isao Tanaka Kunihiro Kuwajima Jens Linge Seán O. Donoghue Michael Nilges G. Chakshusmathi Girish S. Ratnaparkhi P. K. Madhu R. Varadarajan C. Tetreau Molecular Biophysics Unit Indian Institute of Science Bangalore India Austrian Academy of Sciences Institute of Biophysics and X-ray Structure Research Graz Austria Faculty of Biology University of Konstanz Germany Institute of Medical Biochemistry University of Graz Austria Howard Huges Medical Institute Department of Chemistry & Biochemistry University of California La Jolla USA Department of Chemistry & Biochemistry University of California San Diego La Jolla USA Molecular Biophysics Unit India Department of Microbiology &Cell Biology Indian Institute of Science Bangalore India Macromolecular Structure Laboratory NCI - Frederick Cancer Research and Development Center ABL - Basic Research Program Frederick USA Department of Crystallography and Biophysics University of Madras Chennai Biochemistry Department Indian Institute of Science Bangalore India Condensed Matter Physics Division B.A.R.C. Trombay Mumbai Condensed Matter Physics Division Bhabha Atomic Research Centre Trombay Mumbai IMCB The University of Tokyo Tokyo Japan Mitsubishi Chemical Corporation Yokohama Research Center Yokohama Japan Faculty of Pharmaceutical Sciences Chiba University Chiba Japan Department of Biophysics All India Institute of Medical Sciences New Delhi India Department of Biophysics All India Institute of Medical sciences New Delhi India Institüt Physiologische Chemie Hamburg Germany Biophysics Department Bose Institute Calcutta India Slovak Academy of Sciences Institute of Molecular Biology Bratislava Slovakia Indian Institute of Science Bioinformatics Centre Bangalore Departments of Chemistry and Biochemistry Biological Macromolecular Structure Center USA Bulgarian Academy of Sciences Institute of Organic Chemistry Sofia Bulgaria Chinese Academy of Sciences Institute of Biophysics Beijing China Novartis Pharma AG Preclinical Research Basel Switzerland Department of Chemical Sciences Tata Institute of Fundamental Research Mumbai India Solid State Physics Div

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