Jatorri berriztagarria duten zuntz zelulosikoz indarturiko polimero konpositeak

255 p.Azken urteetan, zenbait aplikazioetan erabiltzen diren material konposite sintetikoakordezkatzeko asmoz, biokonpositeak erabiltzeko interesa handitzen ari da. Hartaz,lanaren helburu nagusia jatorri berriztagarria duten material konpositeak prestatzeaeta ezaugarritzea izan da. Horretarako, sisal zuntzen gainazala eraldatu eta poli(azidolaktikoa) (PLA) polimeroan oinarritutako konpositeak prestatu dira. Jatorrizko PLAoso hauskorra dela ikusirik, jatorri ezberdineko landare olio mota ezberdinezplastifikatu da eta ondoren, alkali tratamenduaz eraldaturiko sisal zuntzez indartudira plastifikaturiko PLA matrizeak. Bestalde, almidoi termoplastikoa (TPS), matrizehidrofiloa prestatu eta landare zuntzetatik isolaturiko nanozelulosaz indartu da

Water Uptake Behavior and Young Modulus Prediction of Composites Based on Treated Sisal Fibers and Poly(Lactic Acid)

The main aim of this work was to study the effect of sisal fiber surface treatments on water uptake behavior of composites based on untreated and treated fibers. For this purpose, sisal fibers were treated with different chemical treatments. All surface treatments delayed the water absorption of fibers only for a short time of period. No significant differences were observed in water uptake profiles of composites based on fibers with different surface treatments. After water uptake period, tensile strength and Young modulus values of sisal fiber/poly(lactic acid) (PLA) composites were decreased. On the other hand, composites based on NaOH + silane treated fibers showed the lowest diffusion coefficient values, suggesting that this treatment seemed to be the most effective treatment to reduce water diffusion rate into the composites. Finally, Young modulus values of composites, before water uptake period, were predicted using different micromechanical models and were compared with experimental data.The authors are grateful for the financial support from the Basque Country Government in the frame of Consolidated Groups (IT-776-13) and Elkartek 2015 FORPLA3D project. Technical and human support provided by SGIker (Universidad del Pais Vasco-Euskal Herriko Unibertsitatea (UPV/EHU), Ministerio de Economia y Competitividad (MINECO), Gobierno Vasco-Eusko Jaurlaritza (GV/EJ), European Regional Development Fund (ERDF) and European Science Foundation (ESF)) is also gratefully acknowledged

Jatorri berriztagarria duten zuntz zelulosikoz indarturiko polimero konpositeak

255 p.Azken urteetan, zenbait aplikazioetan erabiltzen diren material konposite sintetikoakordezkatzeko asmoz, biokonpositeak erabiltzeko interesa handitzen ari da. Hartaz,lanaren helburu nagusia jatorri berriztagarria duten material konpositeak prestatzeaeta ezaugarritzea izan da. Horretarako, sisal zuntzen gainazala eraldatu eta poli(azidolaktikoa) (PLA) polimeroan oinarritutako konpositeak prestatu dira. Jatorrizko PLAoso hauskorra dela ikusirik, jatorri ezberdineko landare olio mota ezberdinezplastifikatu da eta ondoren, alkali tratamenduaz eraldaturiko sisal zuntzez indartudira plastifikaturiko PLA matrizeak. Bestalde, almidoi termoplastikoa (TPS), matrizehidrofiloa prestatu eta landare zuntzetatik isolaturiko nanozelulosaz indartu da

Designing Spinel Li₄Ti₅O₁₂ Electrode as Anode Material for Poly(ethylene)oxide-Based Solid-State Batteries

The development of a promising Li metal solid-state battery (SSB) is currently hindered by the instability of Li metal during electrodeposition; which is the main cause of dendrite growth and cell failure at elevated currents. The replacement of Li metal anode by spinel Li4Ti5O12 (LTO) in SSBs would avoid such problems, endowing the battery with its excellent features such as long cycling performance, high safety and easy fabrication. In the present work, we provide an evaluation of the electrochemical properties of poly(ethylene)oxide (PEO)-based solid-state batteries using LTO as the active material. Electrode laminates have been developed and optimized using electronic conductive additives with different morphologies such as carbon black and multiwalled carbon nanotubes. The electrochemical performance of the electrodes was assessed on half-cells using a PEO-based solid electrolyte and a lithium metal anode. The optimized electrodes displayed an enhanced capability rate, delivering 150 mAh g−1 at C/2, and a stable lifespan over 140 cycles at C/20 with a capacity retention of 83%. Moreover, postmortem characterization did not evidence any morphological degradation of the components after ageing, highlighting the long-cycling feature of the LTO electrodes. The present results bring out the opportunity to build high-performance solid-state batteries using LTO as anode material

Enhancing the Performance of Ceramic-Rich Polymer Composite Electrolytes Using Polymer Grafted LLZO

Solid-state batteries are the holy grail for the next generation of automotive batteries. The development of solid-state batteries requires efficient electrolytes to improve the performance of the cells in terms of ionic conductivity, electrochemical stability, interfacial compatibility, and so on. These requirements call for the combined properties of ceramic and polymer electrolytes, making ceramic-rich polymer electrolytes a promising solution to be developed. Aligned with this aim, we have shown a surface modification of Ga substituted Li7La3Zr2O12 (LLZO), to be an essential strategy for the preparation of ceramic-rich electrolytes. Ceramic-rich polymer membranes with surface-modified LLZO show marked improvements in the performance, in terms of electrolyte physical and electrochemical properties, as well as coulombic efficiency, interfacial compatibility, and cyclability of solid-state cells