Ampiroxicam

Electrochem. efficient electrolytes with suitable solvents are an essential requirement for sodium-ion batteries (NIBs).Glymes (i.e., glycol ethers) added with Na salts, also known as "solvate ionic liquids (SILs)", are highly appealing electrolytes for NIBs in terms of low flammability, less toxicity, high electrochem. stability, and environmental compatibility.Herein, we report flexible gel polymer electrolytes (GPEs), composed of SILs containing a "green-glyme" di(propylene glycol) di-Me ether (DPGDME) and sodium bis(trifluoromethanesulfonyl)imide (NaTFSI) of varying molar ratios, immobilized in a polymer poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP).Thick films of SIL-GPEs are optimized for application in quasi-solid-state NIBs via structural, thermal, and electrochem. measurements.These films offer optimum room temperature ionic conductivity (~1.1 mS cm^-1), a high Na-ion transport number (~0.67), a wide oxidative stability voltage limit (~5.2 V vs Na/Na⁺), and thermal stability (up to ~100°C).The GPE film demonstrates excellent reversibility when interfaced with a sodium metal anode observed from the stripping/plating tests on the cell Na|SIL-GPE|Na.The SIL-GPE film is found to be suitable as ascertained by galvanostatic charge-discharge (GCD) tests on the cell Na|SIL-GPE|_Na0.44Mn_O2 offering a capacity of ~105.8 mAh g^-1 at 0.05C.The cell offers a steady performance for ~50 GCD cycles, recorded at 0.33C.The results confirm the potential use of DPGDME as a green solvent in a flexible GPE film for quasi-solid-state NIBs.

Unsorted Construction and Demolition Waste (CDW) from residential building was tested as solid precursor for obtaining eco-sustainable alkali activated materials with potential applications in the building industry.Suitable reactive systems for material consolidation were tested, including alk. solutions of sodium hydroxides and/or silicates at different concentrationsMetakaolin (MK) was also tested as an addnl. precursor together with CDW in different ratios to optimize geopolymn.An MK/CDW weight ratio of 40/60 and sodium silicate as alk. activator allowed the production of a well-reacted and cohesive material, with a bulk d. of 1.35 g/cm³, a monomodal mesoporosity with a modal pore size of 0.0214μm (open porosity ∼42 vol%), and a compressive strength of 25 MPa, thus showing similar features to those of pure metakaolin based-geopolymers.Thermal characterization was performed up to 1000°C showing that the material can exhibit thermal stability up to 650°C.Above that temperature a shrinkage due to viscous flow occurred, followed by an expansion over 750°C with the formation of macropores and dense struts.Based on these results, the developed CDW-based geopolymer has the potential for use in green building applications, with adequate thermal stability up to medium-high temperatures