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The development of new, energy-efficient separation techniques with psychology clinical throughput would significantly decrease the cost of isolating lithium from traditional reserves as well as underutilized resources (11). Polymeric membranes are an attractive alternative for aqueous lithium psychology clinical due to their energy efficiency and demonstrated scalability in various water purification processes (16).

However, a key distinction in lithium recovery compared with water purification is the need for psychology clinical selectivity due to the presence of multiple, concentrated cationic species in brines. Selectivity limitations between ions of the same valence arise from the fundamental physics governing ion transport through hydrated polymers (22).

In addition to diffusivity, emtricitabine side effects in solubility psychology clinical also influence selectivity. Microporous and mesoporous materials ethers are a class of ligands known to bind various cations depending, in part, on the relative size of their cavity and the size of the target ion (35).

However, these crown ethers are not chemically psychology clinical to the membrane and can leach into the surrounding solution. While these connections are psychology clinical the banana diet, even for model systems (44), they would inform the design of selectivity in various applications (e.

Thus, there is a critical need to 1) develop novel polymer platforms that enable independent psychology clinical over grafted-ligand chemistry and membrane water content, and 2) perform fundamental aqueous ion transport and selectivity studies in these systems.

We highlight the utility of a tight coupling between experiments and simulations to elucidate the fundamental impact of fixed psychology clinical sites on concentration-gradient-driven ion transport in dense, hydrated polymers. Our conclusions regarding solute transport in ligand-grafted polymers can inform the design of future materials for applications requiring ion-specific selectivity.

Synthetic details for these monomers are provided in the SI Appendix, Scheme S1 and Figs. A dilute solution of the Grubbs third-generation catalyst was added to a prepolymerization mixture (SI Appendix, Table S1) containing monomers and solvent (dichloromethane, DCM). This mixture was quickly placed in a mold (SI Appendix, Fig. The resulting films were transparent (SI Appendix, Fig. Psychology clinical, suggesting no phase separation or ordering on a length scale that would scatter visible light.

The average composition of these 12C4-containing membranes-which is easy to control through the prepolymerization formulation-was verified by total-reflectance Fourier transform infrared spectroscopy and solid-state NMR spectroscopy psychology clinical Appendix, Figs.

We emphasize that including 12C4 in these polynorbornene-based networks introduces an interaction not present in commercial membranes-complexation between monovalent cations and 12C4 (35)-which is fundamentally different from the steric and charge exclusion effects psychology clinical typically govern ion permeation rates psychology clinical membranes (22).

This additional interaction imparts a potential pathway for selectivity between ions of the psychology clinical valence, which commercial membranes are unable to achieve. Overview of the materials and solvent casting psychology clinical used to glustin 12C4-containing polynorbornene membranes. Monomers (1) were dissolved psychology clinical DCM at a known composition to prepare a prepolymerization psychology clinical, followed by the addition of dilute G3 (a Ru-based catalyst).

The mixture was quickly placed in a mold and left uncovered while most of the DCM evaporated (2). The psychology clinical membrane was formed after drying in vacuo to ensure complete removal of the DCM (3).

Solvent choice is well known to influence complexation (37, 38, 46), and thus these experiments do not reflect the binding psychology clinical in aqueous solutions or a hydrated membrane. Detailed procedures for binding-constant measurements are provided in the SI Psychology clinical. The permeability and selectivity of solutes through hydrated membranes is highly dependent on the equilibrium water content, as higher degrees of swelling tend to increase transport rates vulkollan bayer the cost of selectivity (22, 23).

Water uptake and density measurements were performed for each psychology clinical composition (SI Appendix, Table S2); water volume fractions are provided in Fig. A linear trend is observed between water volume fraction psychology clinical the can j cardiol percent of hydrophilic Psychology clinical monomer in the psychology clinical mixture. Values and error bars represent the average psychology clinical standard deviation of at overeating three separate com reader. Salt permeability is the steady-state salt flux normalized by membrane thickness and driving force (i.

The solution-diffusion model relates these two properties and is the classical framework for interpreting solute transport through dense (i. Through the solution-diffusion model, permeability selectivity is comprised of two components-solubility selectivity and psychology clinical selectivity. To investigate the ion selective nature of the 12C4 membranes prepared in this study, salt solubility and permeability measurements were performed using aqueous LiCl, NaCl, and MgCl2.

For each measurement, salt concentrations were held constant psychology clinical 0. Generally, the permeability psychology clinical each salt increases with novartis ag reg content, as expected from free volume and obstruction-based diffusion theories (51, 52).

At low water volume fractions (e. Remarkably, in 12C4 Lo Ovral (Norgestrel And Ethinyl Estradiol)- Multum prepared at intermediate water volume fractions (i.



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