Can the NF membrane directly obtained by the interfacial polymerization of MPD and TMC?

Li, Lan-Qian; Tang, Yong‐Jian; Xu, Zheng

doi:10.1016/j.memsci.2022.120618

Cited by 20 publications

(4 citation statements)

References 56 publications

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“…Apparently, the CA and HCl post-treatment had a rougher wash effect on the PEI/PIP 8:2 -CC composite ARNFM than the PEI/MPD 7:3 -CC composite ARNFM. The main reason is that the PIP molecules had a lower cross-linking degree with CC than MPD, and the formed PIP-CC oligomer had a weaker chemical stable structure than that of the MPD-CC oligomer since the PIP molecules are semiaromatic diamines and the MPD molecules are full-aromatic diamines …”

Section: Resultsmentioning

confidence: 99%

“…The main reason is that the PIP molecules had a lower cross-linking degree with CC than MPD, and the formed PIP-CC oligomer had a weaker chemical stable structure than that of the MPD-CC oligomer since the PIP molecules are semiaromatic diamines and the MPD molecules are fullaromatic diamines. 45 In the cross-section images of the membranes (Figures 5a2−5f2), each polyamine composite ARNFM had a thinner separating layer than the pristine polyamine ARNFM (409 nm) (Figure 5). It was because the LA-molecules in aqueous solution diffused faster to the reaction interface than that of PEI molecules (1800 Da), and the resulting "primary layer" formed by LA-molecules and CC hindered the reaction between some PEI and CC, avoiding the formation of a too thick separation layer.…”

Section: Surface Chemical Composition Of the Arnfmsmentioning

confidence: 98%

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Dually Charged Acid Stable Tight Polyamine Composite Nanofiltration Membranes with Low Molecular Weight Amine Molecules for MgCl₂ Rejection

Yu,

Sun,

Liu

et al. 2024

ACS Appl. Nano Mater.

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Construction of tight acid-resistant nanofiltration membranes (ARNFMs) with high performance is attracting more and more attention due to the high demand for resourceful treatment of acidic wastewater. In this work, we designed and prepared high-performance polyamine composite ARNFMs with low molecular weight cutoff (MWCO) for MgCl 2 rejection based on the differences in diffusion rates between low molecular weight amine molecules (LA-molecules) and polyethylenimine (PEI, M w = 1800 Da). The LA-molecules reacted with cyanuric chloride (CC) before PEI and the formed primary layer hindered the contact between PEI and CC to some extent. As a result, a thinner separation layer of the polyamine composite ARNFM was constructed due to the introduction of LA-molecules, which endowed the membrane with a much higher water permeability (up to 4.1 times) compared with the pristine polyamine ARNFM. Moreover, the effects of the primary layer structure on the polyamine composited performance and structure were further investigated by utilizing the different reactivity of four LA-molecules (piperazine (PIP), m-phenylenediamine (MPD), diethylene triamine (DETA), and PEI (M w = 600 Da)) with CC. The triamine structure and short molecular chain of DETA helped to form a just right primary layer with appropriate defects and hence assisted the fabrication of a tight polyamine composite ARNFM. The optimized PEI/DETA 2:8 -CC composite ARNFM exhibited a quite high MgCl 2 rejection rate of 99.1% due to the nondefective separation layer, low MWCO (∼144 Da), and the narrow pore size distribution. In addition, all the polyamine composite ARNFMs showed good acid stabilities in 3 wt % HCl for 72 h at a high temperature of 50 °C.

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Section: Resultsmentioning

confidence: 99%

Section: Surface Chemical Composition Of the Arnfmsmentioning

confidence: 98%

Dually Charged Acid Stable Tight Polyamine Composite Nanofiltration Membranes with Low Molecular Weight Amine Molecules for MgCl₂ Rejection

Yu,

Sun,

Liu

et al. 2024

ACS Appl. Nano Mater.

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“…Multi‐voids Nickel foam is an ideal collector due to its diverse microstructures, high conductivity, 3D network open‐hole structure as well as certain flexibility 7–9 . Currently, there are numerous reports on the use of NF as an electrode material, mainly focusing on loading the active materials (inorganic or organic materials) onto the surface of NF by the following methods: electrochemical deposition, chemical polymerization loading, adsorption and weak interaction loading 10–17 . However, the porosity of NF is as high as 60%–80% and there are a large number of voids inside it.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9] Currently, there are numerous reports on the use of NF as an electrode material, mainly focusing on loading the active materials (inorganic or organic materials) onto the surface of NF by the following methods: electrochemical deposition, chemical polymerization loading, adsorption and weak interaction loading. [10][11][12][13][14][15][16][17] However, the porosity of NF is as high as 60%-80% and there are a large number of voids inside it. The active materials can often only be loaded on the NF skeleton and cannot be loaded in the internal voids, resulting in a large number of internal voids that cannot function during active materials loading and subsequent performance testing.…”

Section: Introductionmentioning

confidence: 99%

Flexible PEDOT/NiO@nickel foam composites materials for high‐performance supercapacitors

Shao,

Dong,

et al. 2023

Journal of Polymer Science

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High‐performance composite electrode materials for supercapacitors were developed by two‐step electrochemical deposition of nano‐NiO and poly(3,4‐ethylenedioxythiophene) (PEDOT) on nickel foam (NF). NF is considered an excellent conductive substrate for preparing porous electrode materials due to its high conductivity and porosity. The electrodeposited NiO nanoparticles were uniformly and densely coated on the pore of NF to fill in the internal voids, which provides an abundant active site for the electrodeposition of PEDOT. PEDOT was prepared by simple electrodeposition and was uniformly coated on the substrate surface which has high conductivity and reversible electrochemical redox properties, as well as excellent cyclic stability. The loose surface morphology not only provides abundant redox active sites for electrode material but also contributes the good pseudocapacitance property. As expected, the maximum mass‐specific capacity of PEDOT/NiO@NF composite electrode material can reach up to 129.7 F g−1 at the current density of 1 A g−1. Moreover, the composite electrode material shows excellent electrochemical cycling stability that the specific capacity has no obvious decay compared with its initial capacity after 200 cycles of cyclic voltammetry and 100 cycles of galvanostatic charge–discharge (GCD). This work demonstrates that the composite material PEDOT/NiO@NF could be a candidate flexibility electrode material for high‐performance supercapacitor applications.

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Nanoscale Poly(Dopamine)‐Modified ZIF‐8 Particle Hybrid Solvent‐Resistant Thin Film Nanocomposite (TFN) Membranes via Interfacial Polymerization on a Robust Polyether Ether Ketone (PEEK) Substrate

Huang,

Gao,

Yan

et al. 2024

J of Applied Polymer Sci

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This study introduces an innovative approach to fabricating a poly ether ketone (PEEK)‐based thin‐film nanocomposite (TFN) nanofiltration membrane. Ultrafine polydopamine (PDA) modified zeolitic imidazolate framework‐8 (ZIF‐8) nanoparticles were integrated into the polyamide (PA) layer through a process of interfacial polymerization. The impacts of PDA@ZIF‐8 nanoparticle loading on composite membranes were examined, and their separation performances with different solvents and small molecular organics with various molecular weights and charges were evaluated. The PDA modification is credited with inducing a thinner, less crosslinked PA layer, culminating in the formation of a selective barrier that is both loose and ultra‐thin, improving the separation capabilities of membranes. The TFN‐3 membrane, with a 0.01 wt% loading of PDA@ZIF‐8 nanoparticles, emerged as a standout, demonstrating notably enhanced hydrophilicity. The pure water and organic solvent permeances through the TFN‐3 membrane were remarkably enhanced, with recorded values of 6.19 ± 0.26 L h−1 m−2 bar−1 for pure water and 3.44 ± 0.21 L h−1 m−2 bar−1 for methanol. Furthermore, the TFN‐3 membrane showcased impressive molecular retention in ethanol solutions for compounds with a molecular weight cut‐off (MWCO) of 464 g/mol. The PEEK‐based TFN‐3 membrane also exhibited exceptional creep resistance, ensuring consistent performance during long‐term testing. In a 5‐day ethanol separation test, the TFN‐3 membrane maintained a Rose Bengal (RB) retention rate exceeding 99%, underscoring its stability and reliability. The newly developed PEEK‐based TFN membrane not only promises robust solvent resistance and stability but also delivers efficient separation and purification capabilities. It holds great potential for offering effective and sustainable solutions across a spectrum of industries, particularly in pharmaceutical production and chemical processing, where the separation, recovery, and purification of solvents are paramount.

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Can the NF membrane directly obtained by the interfacial polymerization of MPD and TMC?

Cited by 20 publications

References 56 publications

Dually Charged Acid Stable Tight Polyamine Composite Nanofiltration Membranes with Low Molecular Weight Amine Molecules for MgCl₂ Rejection

Dually Charged Acid Stable Tight Polyamine Composite Nanofiltration Membranes with Low Molecular Weight Amine Molecules for MgCl₂ Rejection

Flexible PEDOT/NiO@nickel foam composites materials for high‐performance supercapacitors

Nanoscale Poly(Dopamine)‐Modified ZIF‐8 Particle Hybrid Solvent‐Resistant Thin Film Nanocomposite (TFN) Membranes via Interfacial Polymerization on a Robust Polyether Ether Ketone (PEEK) Substrate

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Can the NF membrane directly obtained by the interfacial polymerization of MPD and TMC?

Cited by 20 publications

References 56 publications

Dually Charged Acid Stable Tight Polyamine Composite Nanofiltration Membranes with Low Molecular Weight Amine Molecules for MgCl2 Rejection

Dually Charged Acid Stable Tight Polyamine Composite Nanofiltration Membranes with Low Molecular Weight Amine Molecules for MgCl2 Rejection

Flexible PEDOT/NiO@nickel foam composites materials for high‐performance supercapacitors

Nanoscale Poly(Dopamine)‐Modified ZIF‐8 Particle Hybrid Solvent‐Resistant Thin Film Nanocomposite (TFN) Membranes via Interfacial Polymerization on a Robust Polyether Ether Ketone (PEEK) Substrate

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Product

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Dually Charged Acid Stable Tight Polyamine Composite Nanofiltration Membranes with Low Molecular Weight Amine Molecules for MgCl₂ Rejection

Dually Charged Acid Stable Tight Polyamine Composite Nanofiltration Membranes with Low Molecular Weight Amine Molecules for MgCl₂ Rejection