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Ionic polymer-metal composites

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https://www.readbyqxmd.com/read/27828392/voltage-controlled-accommodating-iol-system-using-an-ion-polymer-metal-composite-actuator
#1
Tetsuya Horiuchi, Toshifumi Mihashi, Takashi Fujikado, Tetsuro Oshika, Kinji Asaka
Surgeons treat cataracts by replacing the clouded lens with an intraocular lens (IOL), but patients are required to wear reading glasses for tasks requiring near vision. We suggest a new voltage-controlled accommodating IOL made of an ionic polymer metal composite (IPMC) actuator to change focus. An in vitro experiment was conducted where an actuator was placed inside the eye and moved with applied voltage. The lens attached to the actuator was deformed by its movement to change the patient's focus. The results showed that this system can accommodate a change of approximately 0...
October 3, 2016: Optics Express
https://www.readbyqxmd.com/read/27726333/novel-li-cf3so2-n-c4f9so2-n-based-polymer-electrolytes-for-solid-state-lithium-batteries-with-superior-electrochemical-performance
#2
Qiang Ma, Xingguo Qi, Bo Tong, Yuheng Zheng, Wenfang Feng, Jin Nie, Yongsheng Hu, Hong Li, Xuejie Huang, Liquan Chen, Zhi-Bin Zhou
Solid polymer electrolytes (SPEs) would be promising candidates for application in high-energy rechargeable lithium (Li) batteries to replace the conventional organic liquid electrolytes, in terms of the enhanced safety and excellent design flexibility. Herein, we report novel perfluorinated sulfonimide salt-based SPEs, composed of lithium (trifluoromethanesulfonyl)(n-nonafluorobutanesulfonyl)imide (Li[(CF3SO2)(n-C4F9SO2)N, LiTNFSI) and poly(ethylene oxide) (PEO), which exhibit relatively efficient ionic conductivity (e...
October 11, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27725975/high-internal-ionic-liquid-phase-emulsion-stabilized-by-metal-organic-frameworks
#3
Zhihao Li, Jianling Zhang, Tian Luo, Xiuniang Tan, Chengcheng Liu, Xinxin Sang, Xue Ma, Buxing Han, Guanying Yang
The emulsification of metal-organic frameworks (MOFs) for the two immiscible phases of water and ionic liquid (IL) was investigated for the first time. It was found that Ni-BDC (BDC = 1,4-dicarboxybenzene) can emulsify water and ILs and favor the formation of high internal phase emulsions (HIPEs) under certain experimental conditions. The microstructures of the HIPEs were characterized by confocal laser scanning microscopy using a fluorescent dye Rhodamine B, which proves that the HIPEs are the IL-in-water type...
October 11, 2016: Soft Matter
https://www.readbyqxmd.com/read/27611222/lithium-ion-pathway-within-li7-la3-zr2-o12-polyethylene-oxide-composite-electrolytes
#4
Jin Zheng, Mingxue Tang, Yan-Yan Hu
Polymer-ceramic composite electrolytes are emerging as a promising solution to deliver high ionic conductivity, optimal mechanical properties, and good safety for developing high-performance all-solid-state rechargeable batteries. Composite electrolytes have been prepared with cubic-phase Li7 La3 Zr2 O12 (LLZO) garnet and polyethylene oxide (PEO) and employed in symmetric lithium battery cells. By combining selective isotope labeling and high-resolution solid-state Li NMR, we are able to track Li ion pathways within LLZO-PEO composite electrolytes by monitoring the replacement of (7) Li in the composite electrolyte by (6) Li from the (6) Li metal electrodes during battery cycling...
September 26, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27544737/hierarchical-porous-structured-zeolite-composite-for-removal-of-ionic-contaminants-from-waste-streams-and-effective-encapsulation-of-hazardous-waste
#5
Sama M Al-Jubouri, Nicholas A Curry, Stuart M Holmes
A hierarchical structured composite made from clinoptilolite supported on date stones carbon is synthesized using two techniques. The composites are manufactured by fixing a natural zeolite (clinoptilolite) to the porous surface of date stones carbon or by direct hydrothermal synthesis on to the surface to provide a supported high surface area ion-exchange material for metal ion removal from aqueous streams. The fixing of the clinoptilolite is achieved using sucrose and citric acid as a binder. The composites and pure clinoptilolite were compared to test the efficacy for the removal of Sr(2+) ions from an aqueous phase...
December 15, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27499846/electroactive-polymers-for-sensing
#6
REVIEW
Tiesheng Wang, Meisam Farajollahi, Yeon Sik Choi, I-Ting Lin, Jean E Marshall, Noel M Thompson, Sohini Kar-Narayan, John D W Madden, Stoyan K Smoukov
Electromechanical coupling in electroactive polymers (EAPs) has been widely applied for actuation and is also being increasingly investigated for sensing chemical and mechanical stimuli. EAPs are a unique class of materials, with low-moduli high-strain capabilities and the ability to conform to surfaces of different shapes. These features make them attractive for applications such as wearable sensors and interfacing with soft tissues. Here, we review the major types of EAPs and their sensing mechanisms. These are divided into two classes depending on the main type of charge carrier: ionic EAPs (such as conducting polymers and ionic polymer-metal composites) and electronic EAPs (such as dielectric elastomers, liquid-crystal polymers and piezoelectric polymers)...
August 6, 2016: Interface Focus
https://www.readbyqxmd.com/read/27463563/composite-gel-polymer-electrolyte-based-on-poly-vinylidene-fluoride-hexafluoropropylene-pvdf-hfp-with-modified-aluminum-doped-lithium-lanthanum-titanate-a-llto-for-high-performance-lithium-rechargeable-batteries
#7
Hang T T Le, Duc Tung Ngo, Ramchandra S Kalubarme, Guozhong Cao, Choong-Nyeon Park, Chan-Jin Park
A composite gel polymer electrolyte (CGPE) based on poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) polymer that includes Al-doped Li0.33La0.56TiO3 (A-LLTO) particles covered with a modified SiO2 (m-SiO2) layer was fabricated through a simple solution-casting method followed by activation in a liquid electrolyte. The obtained CGPE possessed high ionic conductivity, a large electrochemical stability window, and interfacial stability-all superior to that of the pure gel polymer electrolyte (GPE). In addition, under a highly polarized condition, the CGPE effectively suppressed the growth of Li dendrites due to the improved hardness of the GPE by the addition of inorganic A-LLTO/m-SiO2 particles...
August 17, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27339316/electronic-structure-of-manganese-complexes-of-the-redox-non-innocent-tetrazene-ligand-and-evidence-for-the-metal-azide-imido-cycloaddition-intermediate
#8
Shivaiah Vaddypally, Ian G McKendry, Warren Tomlinson, Joseph P Hooper, Michael J Zdilla
The first synthetic manganese tetrazene complexes are described as a redox pair comprising anionic [Mn(N4 Ad2 )2 ](-) (1) and neutral Mn(N4 Ad2 )2 (2) complexes (N4 Ad2 =[Ad-N-N=N-N-Ad](2-) ). Compound 1 is obtained in two forms as lithium salts, one as a cationic Li2 Mn cluster, and one as a Mn-Li 1D ionic polymer. Compound 1 is electronically described as a Mn(III) center with two [N4 Ad2 ](2-) ligands. The one-electron oxidized 2 is crystalized in two morphologies, one as pure 2 and one as an acetonitrile adduct...
July 18, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27328111/the-biological-response-to-orthopaedic-implants-for-joint-replacement-part-i-metals
#9
Emmanuel Gibon, Derek F Amanatullah, Florence Loi, Jukka Pajarinen, Akira Nabeshima, Zhenyu Yao, Moussa Hamadouche, Stuart B Goodman
Joint replacement is a commonly performed, highly successful orthopaedic procedure, for which surgeons have a large choice of different materials and implant designs. The materials used for joint replacement must be both biologically acceptable to minimize adverse local tissue reactions, and robust enough to support weight bearing during common activities of daily living. Modern joint replacements are made from metals and their alloys, polymers, ceramics, and composites. This review focuses on the biological response to the different biomaterials used for joint replacement...
June 21, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27307440/flexible-solid-state-ion-conducting-membrane-with-3d-garnet-nanofiber-networks-for-lithium-batteries
#10
Kun Kelvin Fu, Yunhui Gong, Jiaqi Dai, Amy Gong, Xiaogang Han, Yonggang Yao, Chengwei Wang, Yibo Wang, Yanan Chen, Chaoyi Yan, Yiju Li, Eric D Wachsman, Liangbing Hu
Beyond state-of-the-art lithium-ion battery (LIB) technology with metallic lithium anodes to replace conventional ion intercalation anode materials is highly desirable because of lithium's highest specific capacity (3,860 mA/g) and lowest negative electrochemical potential (∼3.040 V vs. the standard hydrogen electrode). In this work, we report for the first time, to our knowledge, a 3D lithium-ion-conducting ceramic network based on garnet-type Li6.4La3Zr2Al0.2O12 (LLZO) lithium-ion conductor to provide continuous Li(+) transfer channels in a polyethylene oxide (PEO)-based composite...
June 28, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27247991/stable-lithium-deposition-generated-from-ceramic-cross-linked-gel-polymer-electrolytes-for-lithium-anode
#11
Chih-Hao Tsao, Yang-Hung Hsiao, Chun-Han Hsu, Ping-Lin Kuo
In this work, a composite gel electrolyte comprising ceramic cross-linker and poly(ethylene oxide) (PEO) matrix is shown to have superior resistance to lithium dendrite growth and be applicable to gel polymer lithium batteries. In contrast to pristine gel electrolyte, these nanocomposite gel electrolytes show good compatibility with liquid electrolytes, wider electrochemical window, and a superior rate and cycling performance. These silica cross-linkers allow the PEO to form the lithium ion pathway and reduce anion mobility...
June 22, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27148625/lithium-dendrite-suppression-with-uv-curable-polysilsesquioxane-separator-binders
#12
Wonjun Na, Albert S Lee, Jin Hong Lee, Seung Sang Hwang, Eunkyoung Kim, Soon Man Hong, Chong Min Koo
For the first time, an inorganic-organic hybrid polymer binder was used for the coating of hybrid composites on separators to enhance thermal stability and to prevent formation of lithium dendrite in lithium metal batteries. The fabricated hybrid-composite-coated separators exhibited minimal thermal shrinkage compared with the previous composite separators (<5% change in dimension), maintenance of porosity (Gurley number ∼400 s/100 cm(3)), and high ionic conductivity (0.82 mS/cm). Lithium metal battery cell examinations with our hybrid-composite-coated separators revealed excellent C-rate and cyclability performance due to the prevention of lithium dendrite growth on the lithium anode even after 200 cycles under 0...
May 25, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27080740/the-biological-response-to-orthopedic-implants-for-joint-replacement-ii-polyethylene-ceramics-pmma-and-the-foreign-body-reaction
#13
Emmanuel Gibon, Luis A Córdova, Laura Lu, Tzu-Hua Lin, Zhenyu Yao, Moussa Hamadouche, Stuart B Goodman
Novel evidence-based prosthetic designs and biomaterials facilitate the performance of highly successful joint replacement (JR) procedures. To achieve this goal, constructs must be durable, biomechanically sound, and avoid adverse local tissue reactions. Different biomaterials such as metals and their alloys, polymers, ceramics, and composites are currently used for JR implants. This review focuses on (1) the biological response to the different biomaterials used for TJR and (2) the chronic inflammatory and foreign-body response induced by byproducts of these biomaterials...
April 15, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27080134/a-multiple-shape-memory-polymer-metal-composite-actuator-capable-of-programmable-control-creating-complex-3d-motion-of-bending-twisting-and-oscillation
#14
Qi Shen, Sarah Trabia, Tyler Stalbaum, Viljar Palmre, Kwang Kim, Il-Kwon Oh
Development of biomimetic actuators has been an essential motivation in the study of smart materials. However, few materials are capable of controlling complex twisting and bending deformations simultaneously or separately using a dynamic control system. Here, we report an ionic polymer-metal composite actuator having multiple-shape memory effect, and is able to perform complex motion by two external inputs, electrical and thermal. Prior to the development of this type of actuator, this capability only could be realized with existing actuator technologies by using multiple actuators or another robotic system...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27023549/investigation-on-the-mechanical-and-electrical-behavior-of-a-tuning-fork-shaped-ionic-polymer-metal-composite-actuator-with-a-continuous-water-supply-mechanism
#15
Guo-Hua Feng, Wei-Lun Huang
This paper presents an innovative tuning fork-shaped ionic polymer metal composite (IPMC) actuator. With an integrated soft strain gauge and water supply mechanism (WSM), the surface strain of the actuator can be sensed in situ, and providing a continuous water supply maintains the water content inside the IPMC for long-term operation in air. The actuator was fabricated using a micromachining technique and plated with a nickel electrode. The device performance was experimentally characterized and compared with an actuator without a WSM...
2016: Sensors
https://www.readbyqxmd.com/read/26977537/influence-of-ambient-humidity-on-the-voltage-response-of-ionic-polymer-metal-composite-sensor
#16
Zicai Zhu, Tetsuya Horiuchi, Karl Kruusamäe, Longfei Chang, Kinji Asaka
Electrical potential based on ion migration exists not only in natural systems but also in ionic polymer materials. In order to investigate the influence of ambient humidity on voltage response, classical Au-Nafion IPMC was chosen as the reference sample. Voltage response under a bending deformation was measured in two ways: first, continuous measurement of voltage response in the process of absorption and desorption of water to study the tendency of voltage variation at all water states; second, measurements at multiple fixed ambient humidity levels to characterize the process of voltage response quantitatively...
March 31, 2016: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/26634644/a-highly-reversible-room-temperature-lithium-metal-battery-based-on-crosslinked-hairy-nanoparticles
#17
Snehashis Choudhury, Rahul Mangal, Akanksha Agrawal, Lynden A Archer
Rough electrodeposition, uncontrolled parasitic side-reactions with electrolytes and dendrite-induced short-circuits have hindered development of advanced energy storage technologies based on metallic lithium, sodium and aluminium electrodes. Solid polymer electrolytes and nanoparticle-polymer composites have shown promise as candidates to suppress lithium dendrite growth, but the challenge of simultaneously maintaining high mechanical strength and high ionic conductivity at room temperature has so far been unmet in these materials...
2015: Nature Communications
https://www.readbyqxmd.com/read/26610439/immobilization-of-metal-hexacyanoferrate-ion-exchangers-for-the-synthesis-of-metal-ion-sorbents-a-mini-review
#18
REVIEW
Thierry Vincent, Chloë Vincent, Eric Guibal
Metal hexacyanoferrates are very efficient sorbents for the recovery of alkali and base metal ions (including radionuclides such as Cs). Generally produced by the direct reaction of metal salts with potassium hexacyanoferrate (the precursors), they are characterized by ion-exchange and structural properties that make then particularly selective for Cs(I), Rb(I) and Tl(I) recovery (based on their hydrated ionic radius consistent with the size of the ion-exchanger cage), though they can bind also base metals...
2015: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/26564471/versatile-structures-of-group-13-metal-halide-complexes-with-4-4-bipy-from-1d-coordination-polymers-to-2d-and-3d-metal-organic-frameworks
#19
Tatiana N Sevastianova, Michael Bodensteiner, Albina F Maulieva, Elena I Davydova, Alexander V Virovets, Eugenia V Peresypkina, Gábor Balázs, Christian Graßl, Michael Seidl, Manfred Scheer, Gernot Frenking, Ekaterina A Berezovskaya, Igor V Kazakov, Olesya V Khoroshilova, Alexey Y Timoshkin
A systematic structural study of complexes formed by aluminium and gallium trihalides with 4,4'-bipyridine (bipy) in 2 : 1, 1 : 1, and 1 : 2 stoichiometric ratios has been performed. Molecular structures of 11 complexes in the solid state have been determined for the first time. Complexes of 2 : 1 composition are molecular, while complexes of 1 : 1 composition form metal-organic frameworks of different kinds: an ionic 3D network (three interpenetrated lvt nets for AlCl3bipy), an ionic 2D network for AlBr3bipy and GaBr3bipy and a 1D coordination polymer in the case of GaCl3bipy...
December 21, 2015: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/26458233/space-science-applications-for-conducting-polymer-particles-synthetic-mimics-for-cosmic-dust-and-micrometeorites
#20
Lee A Fielding, Jon K Hillier, Mark J Burchell, Steven P Armes
Over the last decade or so, a range of polypyrrole-based particles have been designed and evaluated for space science applications. This electrically conductive polymer enables such particles to efficiently acquire surface charge, which in turn allows their acceleration up to the hypervelocity regime (>1 km s(-1)) using a Van de Graaff accelerator. Either organic latex (e.g. polystyrene or poly(methyl methacrylate)) or various inorganic materials (such as silica, olivine or pyrrhotite) can be coated with polypyrrole; these core-shell particles are useful mimics for understanding the hypervelocity impact ionisation behaviour of micro-meteorites (a...
December 11, 2015: Chemical Communications: Chem Comm
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