Novel interfacially-polymerized polyamide thin-film composite membranes: Studies on characterization, pervaporation, and positron annihilation spectroscopy

Highly crosslinked layer-by-layer polyelectrolyte FO membranes: Understanding effects of salt concentration and deposition time on FO performance

“…Following that, the S parameter increases to another plateau and attain its maximum value. This variation of S parameter indicates fine structure change in the LbL films, which can be represented by a threelayer structure model: top selective layer, transition layer from top dense layer to porous PAN layer and porous PAN layer [52]. The fitted result is plotted in Fig.…”

Thin film composite membranes comprising of polyamide and polydopamine for dehydration of ethylene glycol by pervaporation

“…They also prepared polyamide TFC membranes by reacting 1,3-diaminopropane (DAPE), 1,3-cyclohexanediamine (CHDA) and MPD with TMC for use in dehydration of tetrahydrofuran, and the DAPE/TMC membrane was found to exhibit the desirable pervaporation performance [6]. In addition, novel amines (e.g., 2,2′-dimethylbenzidine hydrochloride (m-tolidine-H) [7]) and acyl chlorides (e.g., 5-nitrobenzene-1,3-dioyl dichloride and 5-tert-butylbenzene-1,3-dioyl dichloride [8]) have been synthesized to produce interfacially polymerized membranes for ethanol dehydration. Optimization of the membrane formation conditions during the procedure of interfacial polymerization is another subject of interest for TFC pervaporation membranes.…”

A study on high-performance composite membranes comprising heterogeneous polyamide layers on an electrospun substrate for ethanol dehydration

“…Free volume in the composite membrane was measured with a variable monoenergy slow positron beam [22][23][24][25] (VMSPB) (R&D Center for Membrane Technology in Chung Yuan University in Taiwan). The source of positron produced by the new radioisotope beam was 50 mCi of 22 Na.…”