Correlating the microstructure of novel polyamide thin-film composite membranes with ethanol dehydration performances

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

“…Table 3 shows a comparison of the pervaporation performance of various kinds of polymeric composite membranes. At low feed temperatures (25 or 30 1C), the composite membrane we fabricated, TETA-TMC/BAE-SCC/ePAN, exhibits higher permeation flux and maintains comparable separation factor, compared with the other polyamide composite membranes [36][37][38]. At high feed temperatures (70 or 80 1C), the composite (TETA-TMC)(BAE-SCC)/ePAN membrane shows a permeation flux higher by 1 order of magnitude and an exceptional separation factor, compared with the other composite membranes [41][42][43][44][45][46].…”

Second interfacial polymerization of thin‐film composite hollow fibers with amine‐cyclodextrins for pervaporation dehydration

“…However, it is always a big challenge to achieve a high selectivity of the TFC membrane in the pervaporation field, 7,19,20 because of the difficulty to acquire sufficiently hydrophilic, dense, and defect‐free selective layer. This situation is getting worse for TFC HF membrane, since HF membrane generally has a relatively looser skin morphology compared to the flat‐sheet membrane prepared with the same dope solution 21,22 …”