Dry-RO membranes from blends of ionogenic and nonionogenic polymers

Morphology of crystalline Nylon-610 membranes prepared by the immersion-precipitation process: competition between crystallization and liquid–liquid phase separation

“…These membranes are nowaday employed extensively in various separation processes. Kesting addressed the Nylon-6 and -66 membranes as the "state of the art" microfiltration membranes [4]. Fang investigated the potonation of Nylon-6 in hydrochloric acid solutions and found that the molecular weight of polymer in these dope solutions depended upon the dope's age; the latter in turn affected the morphology of the fomed membrane [5].…”

Effect of Compatibility of PVC/P2 Alloy System on Membrane Structure and Performance

“…3 Subsequently, asymmetric alloy membranes consisting of CA/poly-4-vinylpyridine or CA/aromatic polyphosphate [4][5][6][7] were used in RO desalination and azeotropic liquid separation with satisfactory results. In the 1980s, Kesting et al did systematic research on blending systems of CA and Nylon RO membranes [8][9][10] and obtained important results. During the past two decades, studies on novel alloy membrane systems have been widespread, [11][12][13][14][15][16][17][18][19][20] all of them indicating that alloy membranes provide a very effective and promising approach to modifying both the chemical and the physical structure of membranes, as well as controlling membrane performance.…”