Topic
Nafion
About: Nafion is a research topic. Over the lifetime, 9110 publications have been published within this topic receiving 320865 citations.
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TL;DR: It is demonstrated that microporous PVDF membranes sandwiched between multiple layers of nanomaterials can be used for continuous monitoring of glucose level in vivo by coating needle electrodes with Polyaniline nanofiber, Platinum nanoparticles, glucose oxidase enzyme and porous layers, successfully fabricated with layer-by-layer deposition.
89 citations
TL;DR: The results showed that membranes containing large crystals in low amounts displayed the best results in terms of proton conductivity values, reaching values by 30% higher than those of pure Nafion, while leaving the mechanical properties substantially unchanged.
Abstract: Mixed membrane matrices (MMMs) made up with Nafion and nanocrystals of zirconium metal–organic framework (MOF) UiO-66 or the analogous sulfonated SO3H-UiO-66 were prepared by varying the filler loading and the size of the crystals. The combined effects of size and loading, together with the presence of sulfonic groups covalently linked to the MOFs, were studied with regard to the conductivity and mechanical properties of the obtained composite matrices. A large screening of membranes was preliminarily made and, on the most promising samples, an accurate conductivity study at different relative humidities and temperatures was also carried out. The results showed that membranes containing large crystals (200 nm average size) in low amounts (around 2%) displayed the best results in terms of proton conductivity values, reaching values by 30% higher than those of pure Nafion, while leaving the mechanical properties substantially unchanged. On the contrary, MMMs containing MOFs of small size (20 nm average size...
89 citations
TL;DR: In this article, the microstructural evolution and swelling behaviors of sulfonated poly(etheretherketone) (SPEEK) and Nafion polymer membranes have been investigated by small angle X-ray scattering (SAXS) after equilibrating them in 2-M methanol solution at various temperatures.
89 citations
TL;DR: In this paper, the impregnated covalent organic frameworks (COFs) were used to construct a continuous proton transfer channel with low energy barrier in PEMFCs, and the composite membrane exhibits a superior proton conductivity of 0.0604 S cm −1 at 51% relative humidity and 80°C.
89 citations
TL;DR: In this paper, polyelectrolyte membranes based on partially sulfonated poly(ether ether ketone) (sPEEK) with various degrees of sulfonation are prepared.
89 citations