Graft modification of polybenzimidazole membranes for organic solvent ultrafiltration with scale up to spiral wound modules was written by Oxley, Adam;Gaffney, Piers R. J.;Kim, Daeok;Marchetti, Patrizia;Livingston, Andrew G.. And the article was included in Journal of Membrane Science in 2022.Reference of 109-85-3 The following contents are mentioned in the article:
In this work the selectivity of crosslinked organic solvent stable PBI membranes is tuned by varying the molar ratio of two grafting agents: a long flexible polymer modifier (Elastamine RE-1-1000, 1000 g mol-1) and a small mol. modifier (2-methoxyethylamine, 75 g mol-1). Grafting exclusively with the long chain modifier provided a membrane with a mol. weight cut-off (MWCO) of 2000 g mol-1 in acetonitrile. Increasing the proportion of small mol. modifier in the grafting reaction capped the grafting sites in the membrane. This caused a decrease in the grafting d. of the polymer modifier and allowed for the MWCO to be customized between 2000 g mol-1 and 20,000 g mol-1 in acetonitrile. High grafting densities underlie this control of performance, with up to 43% increase in the sp. weight of the membrane during modification. This technique was scaled up to the manufacture of 5 m lengths of membrane that were incorporated into 1.8” x 12” spiral wound modules, which showed performance consistent with the flat sheet membranes. This study involved multiple reactions and reactants, such as 2-Methoxyethylamine (cas: 109-85-3Reference of 109-85-3).
2-Methoxyethylamine (cas: 109-85-3) belongs to ethers. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Reference of 109-85-3
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem