The time-dependent CO2-induced plasticization behavior of glassy Matrimid® 5218 polymer membranes at supercritical conditions up to 120 bar was investigated. Glassy polyimide were conditioned with both gaseous CO2 and liquid-like sc-CO2. during permeation sorption correlated the intrinsic membrane properties fluid properties. In region concentration increased slightly over time, while in sc-CO2...

The carbon dioxide (CO2) separation can be enhanced by using modified materials like a deep eutectic solvent (DES) mesoporous silica SBA-15 in polymeric support i.e polysulfone via mixed matrix membranes (MMMs). pure and DES are potential candidates for the CO2 capturing their combination has not been reported yet. In this work, fresh was synthesized combining equal concentrations of Decanoic a...

among various reported membrane-based gas separation processes, the best explanation is generally achieved by the solution-diffusion model. the main factors in this model are the solubility and diffusivity of permeationcomponents through the membrane. the prediction of permeability and diffusivity in multicomponent gas permeation as well as the separation evaluation equilibrium and kinetic inte...

Metal complexes of meso-arylporphyrins (Cr(III), Fe(III), and Zn(II)) were evaluated in the coupling reaction of cyclohexene oxide (CHO) with CO2 in compressed medium, where the Cr complexes were demonstrated to be the most active systems, leading predominantly to copolymerisation products. It is noteworthy that no addition of solvent was required. To improve the catalytic activity, and to simu...

A PEBAX-nano zeolite X mixed matrix membrane was fabricated and operationally characterized using single gas (CO2) permeation. X-ray diffraction (XRD) analysis was used to study the arrangement of polymer chains of mixed matrix membrane. The membranes were characterized by scanning electron microscopy (SEM) to study cross-sectional morphology. The single gas permeability were carried...

Graphene oxide (GO)-polyether block amide (PEBA) mixed matrix membranes were fabricated and the effects of GO lateral size on membranes morphologies, microstructures, physicochemical properties, and gas separation performances were systematically investigated. By varying the GO lateral sizes (100–200 nm, 1–2 lm, and 5–10 lm), the polymer chains mobility, as well as the length of the gas channel...

In this research, Polyether block amide (PEBA) containing different loadings of α-Al2O3 particles was deposited on top the polysulfone (PSf ) supports to form PEBA 1657‒α-Al2O3/PSf multilayer composite mixed matrix membranes (MCMMMs). Multilayer Composite structure used overcome sedimentation fillers in polymer matrix. Moreover, alpha phase Al2O3 applied improve distribution these at higher loa...

preformulation studies on transdermal dosage forms involve liberal use of animal skin for assessing the permeation characteristics of drugs, influence of permeation enhancers, optimizing the formulation variables etc. the restricted availability of animal skin due to concerns regarding prevention of cruelty to animals has generated considerable interest in developing polymeric films for use as ...