Synthesis, cross-linking modifications of 6FDA-NDA/DABA polyimide membranes for ethanol dehydration via pervaporation

Multilayer mixed matrix membranes containing modified-MWCNTs for dehydration of alcohol by pervaporation process

“…Various polymeric materials including poly(vinyl alcohol) (PVA) [8,[11][12][13], chitosan [14,15], polyamide (PA) [16,17], polyimide (PI) [18,19], polyacrylonitrile (PAN) [20], poly(tetrafluoroethylene) (PTFE) [21], polyethersulfone (PES) [7] and polysulfone (PSf) [22] have been used for preparation of the different types of pervaporation membranes for dehydration purposes. Among them, the PVA membrane was given more attention due to its strong affinity to water molecules, good membrane forming properties and mechanical strength [11].…”

Novel Organo Soluble Polyimides and Polyimide Nanocomposites Based on 1,4-bis((4-aminophenyl)-1,3,4-oxadiazolyl)benzene, baob, via baobmodified Organoclay

“…The conversion from poly(amic acid) to polyimide was confirmed by the presence of these strong imide absorption bands and the absence of a broad absorption band due to the amino (N-H) and hydroxyl (OH) groups [49]. Infrared spectroscopy data, inherent viscosities, and reaction yields are listed in Table 1.…”

In situ regulation of micro-pore to design high performance polyimide membranes for pervaporation dehydration of isopropanol

“…In chemical crosslinking, the chemical agents are used as bridges among polymer chains, reconstructing pore structures and constraining membrane swelling. Our group has chemically cross-linked polyimide membranes by various amines [22][23][24][25], while inorganic compounds such as metal salts and inorganic metallic compounds have been utilized as cross-linkers and fillers to adjust polyimide properties [26][27][28][29][30].…”