Polypyrrole as the interlayer for thin‐film poly(piperazine‐amide) composite membranes: Separation behavior of salts and pesticides

Abstract

The preparative membrane process is a dynamic one and intertwined with the separation arena. As for the progression of technology in membranes, our direction is to prepare polypyrrole interlayer‐based thin‐film composite (TFC) membrane. Polypyrrole shows its attachment ability with polysulfone membranes. The coverings of pores with the polypyrrole entity result in better flux in terms of TFC membranes compared to TFC membranes on polysulfone (Memb‐I). The membranes are characterized by FTIR‐ATR, contact angle, zeta potential, SEM, AFM. Polypyrrole interlayer‐based membrane (Memb‐II) show better flux though it sacrifices salt separation ability compared to Memb‐I. Memb‐II shows a better separation of pesticides (diuron and isoproturon) compared to Memb‐I. Memb‐II provides isoproturon's separation ability (89.52% rejection, 54.9 LMH), whereas, for diuron, it is 78.82%, 53.46 LMH. The antimicrobial property is seen for interlayer polypyrrole‐based TFC membranes.

Coupling solar‐driven interfacial evaporation with forward osmosis for continuous water treatment

“…The TFC membrane exhibits a contact angle of 80 ° (Figure 2B). For the photothermal sponge, it obtains several peaks at 1541, 1472, and 1282 cm –1 , corresponding to C─C/C═C stretching, pyrrole ring, and C─N stretching vibration, respectively, [ 24,37 ] which indicates the successful deposition of PPy on nano‐sponge.…”

Fabrication and characterization of polyamide thin-film composite membrane via interfacial polycondensation for pervaporation separation of salt and arsenic from water

“…Compared with the spectrum of PSf substrate, the new peaks at 1541 cm À1 , 1650 cm À1 , and 1725 cm À1 are correspondent to the vibration of N-H (amide II), C]O (amide I), and COOH groups, respectively. [22][23][24][25] The carboxylic acid groups arise from the hydrolysis of the acyl chlorides, which are unreacted with amine monomers. 3 As shown from Fig.…”

“…This surface morphology is similarly reported in previous studies on the synthesis of poly(piperazine amide) membrane. 24,26 Meanwhile, the MPD-TMC membrane shows a ridge and valley morphology, together with a dense surface. As regards the cross-section of the synthesized membranes (Fig.…”

Transport of particles through RO membrane in steady state condition

“…Permeation increases by introducing polypyrole layer in TFC membrane. [12] Nonpolar mixtures are also separated using hydrophobic rich TFC membrane. [6,13] Selective separation in both organic and polar solvents is recently developed using trianglamine macro-cycle as a monomer for cross-linked membranes.…”

“…Incorporating ions like copper Cu ++[11] in membrane matrix shows better pesticide removal from water and also better antibacterial properties. Permeation increases by introducing polypyrole layer in TFC membrane [12] . Nonpolar mixtures are also separated using hydrophobic rich TFC membrane [6,13] .…”