55 documents found, page 1 of 6

Threat of preterm labour: case report

Introduction: Threatened preterm birth is a worrying clinical condition due to the increased risk of neonatal morbidity and mortality, so it is crucial to identify the warning signs early and minimise complications. This case report concerns a pregnant woman at 24 weeks and 6 days with threatened preterm labour. Objective: To draw up a proposal for a nursing care plan focusing on the factors that trigger the th...

Enhancing Proton Conductivity of SPEEK Based Membranes by Incorporation Graphen...

ABSTRACT: The most commercially successful membrane for applications in fuel cell and electrolyzers, perfluorinated sulfonic NafionR, exhibits relevant performance limitations due to its dependence on water content with consequent proton mobility restrictions, environmental concerns and very high cost. Poly(etheretherketone) (SPEEK) polymer appears as a versatile non-fluorinated alternative for a low-cost and a...

New proton exchange membranes based on ionic liquid doped chitosan

ABSTRACT: The development of new proton exchange membranes (PEM) for electrochemical devices have attracted researcher's attention in the pursuit for more sustainable and cost-effective technologies for clean energy production and conversion. In this work, new doped chitosan (CS) membranes were prepared by the casting method. Chitosan is an abundant, biodegradable and non-toxic material, and as a membrane, a su...

New Modified SPEEK-Based Proton Exchange Membranes

ABSTRACT: A decarbonized society demands cleaner and sustainable energy sources based on well-established or emerging technologies with the potential to make a significant contribution to energy storage and conversion, such as batteries, fuel cells and water and/or CO2 electrolyzers. The performance of these electrochemical devices relies on key components such as their separators/ion-exchange membranes. The mo...

New membranes for CO2 electrochemical reduction {Resumo]

New SPEEK Membranes Modified with Bisphophonate Dopants [Resumo]

ABSTRACT: ustainable emerging energy technologies are pivotal to a decarbonized society that still continuously increases its energy demands. Fuel cells and eletrolyzers are part of these promising sustainable technologies, but they still depend on several factors, especially on their membranes. These are a key component acting as a separator, between their different materials and electrolytes of different devi...

Chitosan doped membranes for electrochemical devices [Resumo]

ABSTRACT: The development of new proton exchange membrane (PEM) for electrochemical devices, such as fuel cells and electrolyzers, have attracted researcher’s attention in the pursuit for more sustainable and cost-effective technologies for clean energy production, being extensive those for CO2 reduction and conversion1,2. To this end, in the present work, new modified chitosan (CS) membranes doped with ionic l...

Enhancing Conductivity in PEM Chitosan Membranes through Bisphosphonate Graphen...

New triazinephosphonate dopants for Nafion proton exchange membranes (PEM)

ABSTRACT: A new paradigm for energy is underway demanding decarbonized energy systems. Some of them rely on emerging electrochemical devices, crucial in hydrogen technologies, including fuel cells, CO 2 and water electrolysers, whose applications and performances depend on key components such as their separators/ion-exchange membranes. The most studied and already commercialized Nafion membrane shows great chem...

Chemical stability of new nafion membranes doped with bisphosphonic acids under...

ABSTRACT: The development of new proton exchange membranes for PEM technology in fuel cells and electrolysers with increased durability is paramount to system's lifetime and scalability. In this work, new modified Nafion membranes doped with bisphosphonic acids are proposed with increased resilience to chemical degradation by H2O2/Fe2+, mimicking ex-situ radical attack to membrane structure. Relevant properties...