Polyaniline-co-epichlorohydrin nanoporous anion exchange membranes for diffusion dialysis

Prajapati, Pradeep Kumar; Nimiwal, Raghavendra; Singh, Puyam S.; Nagarale, Rajaram K.

doi:10.1016/j.polymer.2019.03.016

Cited by 18 publications

(5 citation statements)

References 44 publications

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“…The observed values of average roughness and peak-to-peak separation for the PP substrate were 18.6 and 273 nm, respectively. It is well reported in the literature that the formation of a high-molecular-weight polymer in the pores of a substrate dramatically increases its surface roughness. , Recently, our group , also reported a commendable change in roughness for a polyaniline and poly(o-anisidine)-coated polypropylene support. The increased surface roughness for the PFAEM suggests the successful entrapment of poly(4-vinyl pyridine) in the voids of the porous PP substrate.…”

Section: Resultsmentioning

confidence: 55%

High-Capacity Retention Thermally Reinforced Pore-Filled Anion Exchange Membrane for All-Vanadium Flow Batteries

Sreenath

Pawar

et al. 2022

ACS Appl. Energy Mater.

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In this work, we report a thermally annealed porefilled anion exchange membrane (PFAEM) with excellent mechanical and chemical stability effected by a polypropylene support and impressive electrochemical properties induced by a pore-filled poly (4-vinyl pyridine) matrix followed by its successful demonstration in vanadium redox flow batteries (VRFBs). As expected, a low swelling ratio synergized with Donnan exclusion resulted in low vanadium ion diffusion. The calculated permeability rates for V +3 , VO 2+ , and VO 2 + were 4.80 × 10 −7 , 7.11 × 10 −7 , and 9.4 × 10 −7 dm s −1 , respectively. An exceptionally low dimension change (∼4.5%) was observed in 1.6 M VO 2 + /2 M H 2 SO 4 solution over 15 days. The assembled VRFB exhibited a Coulombic efficiency (CE) of 98.6% and energy efficiency (EE) of 69.2% over 50 charge/discharge cycles at 150 mA cm −2 with a high-capacity retention of 70% and average capacity decay of 0.63% per cycle. The observed peak power density was 340 mW cm −2 . Finally, the autopsy of the membrane after battery performance suggested negligible depreciation in mechanical and electrochemical properties, confirming its potential applicability in VRFBs.

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Section: Resultsmentioning

confidence: 55%

High-Capacity Retention Thermally Reinforced Pore-Filled Anion Exchange Membrane for All-Vanadium Flow Batteries

Sreenath

Pawar

et al. 2022

ACS Appl. Energy Mater.

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“…The water flux and MWCO study was performed as described in our recent report 39 . The results of water flux and MWCO study are presented in Figure 9.…”

Section: Resultsmentioning

confidence: 99%

In‐solution structure formation of poly(vinylidene fluoride) building units influencing on the final membrane characteristics

Prajapati

Singh

2020

J of Applied Polymer Sci

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A systematic study was carried out on the initial casting solutions of asymmetric PVDF ultrafiltration membranes to observe the aggregate structure of polymer building units in solution and the properties of the membranes in terms of microstructure morphology, crystallinity, average pore size, pore-size distribution, total porosity, hydrophobicity, wetting energy, molecular weight cutoff, and permeability. Hydrophobic membrane of higher porosity exhibiting higher flux was obtained from the solution of bigger polymer structural units while the membrane obtained from solution of smaller polymer structural units exhibited relatively rougher and hydrophilic surface and smaller uniform pores with lesser flux.

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“…The first porous membrane is pore-filled AEMs, which are prepared by soaking a porous substrate into the monomer mixture followed by a radical polymerization process. As a result, a guest polyelectrolyte gel is introduced into the pores of a host polymer [ 70 , 71 , 72 ]. Chava [ 73 ] prepared a pore-filled AEM by filling the microporous substrate of polypropylene (PP) with organosiloxane-based organic-inorganic hybrid anion exchange microgels.…”

Section: Acid Permeabilitymentioning

confidence: 99%

Diffusion Dialysis for Acid Recovery from Acidic Waste Solutions: Anion Exchange Membranes and Technology Integration

Zhang

Wang

2020

Membranes

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Inorganic acids are commonly used in mining, metallurgical, metal-processing, and nuclear-fuel-reprocessing industries in various processes, such as leaching, etching, electroplating, and metal-refining. Large amounts of spent acidic liquids containing toxic metal ion complexes are produced during these operations, which pose a serious hazard to the living and non-living environment. Developing economic and eco-friendly regeneration approaches to recover acid and valuable metals from these industrial effluents has focused the interest of the research community. Diffusion dialysis (DD) using anion exchange membranes (AEMs) driven by an activity gradient is considered an effective technology with a low energy consumption and little environmental contamination. In addition, the properties of AEMs have an important effect on the DD process. Hence, this paper gives a critical review of the properties of AEMs, including their acid permeability, membrane stability, and acid selectivity during the DD process for acid recovery. Furthermore, the DD processes using AEMs integrated with various technologies, such as pressure, an electric field, or continuous operation are discussed to enhance its potential for industrial applications. Finally, some directions are provided for the further development of AEMs in DD for acid recovery from acidic waste solutions.

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Polyaniline-co-epichlorohydrin nanoporous anion exchange membranes for diffusion dialysis

Cited by 18 publications

References 44 publications

High-Capacity Retention Thermally Reinforced Pore-Filled Anion Exchange Membrane for All-Vanadium Flow Batteries

High-Capacity Retention Thermally Reinforced Pore-Filled Anion Exchange Membrane for All-Vanadium Flow Batteries

In‐solution structure formation of poly(vinylidene fluoride) building units influencing on the final membrane characteristics

Diffusion Dialysis for Acid Recovery from Acidic Waste Solutions: Anion Exchange Membranes and Technology Integration

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