Hyperfiltration studies XIV Porous tubes precoated with filteraids as supports for dynamically formed membranes

Review of Dynamic Membranes

“…The findings of the pioneering work carried out at the Oak Ridge National Laboratory were published as part of a comprehensive series of articles entitled "Hyperfiltration Studies" , Shor et al 1968, Johnson et al 1968). The initial dynamic membranes were formed from FeC13, which had been aggregated by boiling in solution, on a silver frit with an average pore size of 0.8 mm ).…”

“…Johnson (1968) used porous stainless steel tubes with nominal pore sizes of 5 to SO μιη. In order to achieve the lower porosity necessary for dynamic membrane formation, commercial filter-aids were circulated in the system prior to dynamic membrane formation.…”

Chemistry in a spinneret—On the interplay of crosslinking and phase inversion during spinning of novel hollow fiber membranes

“…Both polymerization techniques result in an extremely thin dense film of thickness within the 50 nm range [3]. (iii) Dynamical coating, technique developed by Johnson and Kraus [11,12], in which the selective layer is formed on the surface of a microporous support membrane by filtering a solution containing suspended colloid. Membranes produced by this technique found an application in reverse osmosis but proved to be unstable and difficult to reproduce due to the loss of the colloidal surface in time [2].…”