In-situ growth of double-layered polyaniline composite membrane for organic solvent nanofiltration

Novel polyaniline–polyethersulfone nanofiltration membranes: effect of in situ polymerization time on structure and desalination performance

“…It is assumed that PANI layering at the surface of PES membranes offered a significant resistance to salt solution permeation by blocking pores and reducing porosity. 19 The increase in salt rejection can also be attributed to the adsorptive behavior of polyaniline and its negatively charged surface. 71 The adsorptive behavior tends to capture salt ions on the membrane surface forming a thin salt layer that offers further hindrance to permeating salt and water molecules thus increasing the salt rejection but at the expense of reducing water flux.…”

“…17 Composite membranes comprising of intrinsically conducting polymers (ICPs) such as polyaniline have also been used in a variety of applications such as electrodialysis, solvent separation, and acid-base separation. [18][19][20] Polyaniline (PANI) is one of the most widely used ICPs in membranes and has high electrical conductivity, electrochemical activity, excellent environmental and solution stability, low synthesis cost, and the ability to electrochemically switch between conductive and nonconductive states through a doping/dedoping process. [21][22][23][24] Nanoltration and ultraltration (UF) membranes for water treatment have been synthesized using polyvinylidene uoride (PVDF), polyvinyl alcohol (PVA), polyacrylonitrile (PAN), polypropylene (PP), polysulfone (PSF), and polyethersulfone (PES).…”

“…Composite membranes comprising of intrinsically conducting polymers (ICPs) such as polyaniline have also been used in a variety of applications such as electrodialysis, solvent separation, and acid-base separation. 18–20 Polyaniline (PANI) is one of the most widely used ICPs in membranes and has high electrical conductivity, electrochemical activity, excellent environmental and solution stability, low synthesis cost, and the ability to electrochemically switch between conductive and non-conductive states through a doping/dedoping process. 21–24…”

Controllable and Rapid Synthesis of Conjugated Microporous Polymer Membranes via Interfacial Polymerization for Ultrafast Molecular Separation

“…The elemental composition of C, N, and O for PDA-MPD membranes was 77.7, 13.5, and 9.8%, respectively (Table S3). The C/N ratio kept increasing in CMP membranes compared to HPAN due to the synthesized CMP layers on the HPAN . Besides, a high content of the oxygen element for PDA-MPD membranes could be attributed to unreacted aldehydes and the adsorption of hydrone on residual amine or protonated amine.…”

In-situ synthesis of KAUST-7 membranes from fluorinated molecular building block for H2/CO2 separation

“…Compared to other methods, in-situ synthesis is the simplest and fundamental method, which is the most primitive method in the preparations of MOF membranes [35]. However, only a very few MOF membranes can be fabricated directly by in-situ synthesis and the biggest challenge is short of adequate heterogeneous nucleation sites on the surface of substrates due to a lack of interaction between MOF and supports [36,37]. In other words, fabricating MOF membranes via in-situ synthesis is still full of severe challenges, especially for the MOF materials containing complexed ligands and corrosive reactants, which needs unremitting exploration and attempts of related membrane researchers.…”