A novel semi-aromatic polyamide TFC reverse osmosis membrane fabricated from a dendritic molecule of trimesoylamidoamine through a two-step amine-immersion mode

Wu, Hao; Chen, Xiaolin; Huang, Xiang; Ruan, Hao; Ji, Yan-Li; Liu, Lifen; Gao, Congjie

doi:10.1039/c7ra07298h

Cited by 17 publications

(2 citation statements)

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“…In recent years, we have successfully synthesized a new type of dendrimer, trimesoyl amide amine (TMAAM, Fig. 1), 26,27 which comprises multiple hydroxyl groups and aliphatic amines. It is hypothesized that the hydrophilicity and antifouling properties of membranes would be signicantly improved via incorporating TMAAM.…”

Section: Introductionmentioning

confidence: 99%

Modification of polyamide TFC nanofiltration membrane for improving separation and antifouling properties

et al. 2018

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In this work, a dendrimer trimesoyl amide amine (TMAAM) monomer was proposed to be used as a key functional monomer to modify the conventional aromatic polyamide thin-film composite (TFC) nanofiltration (NF) membrane, and a new kind of TMAAM-based semi-aromatic polyamide composite NF membrane was thus prepared by interfacial polymerization. The effects of the PIP/TMAAM ratio (PIP ¼ piperazine) on the membrane chemical structure, surface properties and separation performances were investigated systematically. With the increase in TMAAM content loaded in the membrane, the water flux strongly increased but the salt rejection decreased only slightly. When the PIP/TMAAM ratio was 1, the membrane NF-2 exhibited a smoother and more hydrophilic surface, as a result of which it displayed an optimum separation performance for different valent salts. In addition, the TMAAM modified TFC membrane presented an extremely high rejection to negatively charged dye molecules and high permeation for monovalent salts, leading to good prospects for dye/salt separation application. Moreover, both the water flux and salt rejection of the TMAAM-based membrane were stable in a longterm running process, and the membrane showed a favourable anti-fouling property and efficient cleaning recovery. Therefore, this work provides a new type of semi-aromatic polyamide composite NF membrane fabricated by a facile and straightforward method via interfacial polymerization with high hydrophilicity, good stability and strong anti-fouling property.

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Section: Introductionmentioning

confidence: 99%

Modification of polyamide TFC nanofiltration membrane for improving separation and antifouling properties

et al. 2018

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“…However, PA membrane applications are restricted due to their relatively low chemical and chlorine tolerance, and higher fouling potential. [2][3][4] Fouling is one of the main problems in membrane separation, which reduces efficiency, increases operational cost, and shortens membrane life. [5] Therefore, it has been a long-standing goal to develop highly stable PA membranes with antifouling properties.…”

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Comparative impact of SiO₂ and TiO₂ nanofillers on the performance of thin‐film nanocomposite membranes

Urper-Bayram

Bossa

Warsinger

et al. 2020

J of Applied Polymer Sci

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Nanoparticle (NP) additions can substantially improve the performance of reverse osmosis and nanofiltration polyamide (PA) membranes. However, the relative impacts of leading additives are poorly understood. In this study, we compare the effects of TiO2 and SiO2 NPs as nanofillers in PA membranes with respect to permeate flux and the rejection of organic matter (OM) and salts. Thin‐film nanocomposite (TFN) PA membranes were fabricated using similarly sized TiO2 15 nm and SiO2 (10 – 20 nm) NPs, introduced at four different NP concentrations (0.01, 0.05, 0.2, and 0.5% w/v). Compared with PA membranes fabricated without NPs, membranes fabricated with nanofillers improved membranes hydrophilicity, membrane porosity, and consequently the permeability. Permeability was increased by 24 and 58% with the addition of TiO2 and SiO2, respectively. Rejection performance and fouling behavior of the membranes were examined with salt (MgSO4 and NaCl) and OM (humic acid [HA] and tannic acid [TA]). The addition of TiO2 and SiO2 nanofillers to the PA membranes improved the permeability of these membranes and also increased the rejection of MgSO4, especially for TiO2 membranes. The addition of TiO2 and SiO2 to the membranes exhibited a higher flux and lower flux decline ratio than the control membrane in OM solution filtration. TFN membranes' HA and TA rejections were at least 77 and 71%, respectively. The surface change properties of NPs appear to play a dominant role in determining their effects as nanofillers in the composite membrane matrix through a balance of changes produced in membrane pore size and membrane hydrophilicity.

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Membrane Technology

Ray

2023

Encyclopedia of Polymer Science and Technology

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Separation by membranes in chemical and allied industries has been of prime importance in the last few decades because of its low energy requirement and environment friendly process. In the last two decades, there has been significant development of this novel separation technology in academic research and industrial applications. Several new membranes such as new kinds of thin film composite membranes, nanocomposite membranes, metal–organic framework membranes, mixed matrix membranes, polyelectrolyte membranes, graphene and carbon nanotube‐based membranes, polymer inclusion membranes, and new kinds of liquid membranes have been developed for applications in reverse osmosis, nanofiltration, ultrafiltration, microfiltration, pervaporation, gas separation or facilitated transport with liquid membranes. Membranes based on functional polymers and composites of polymer and ceramic materials have shown significant improvement in flux, selectivity, or salt rejection. This article discusses elaborately on the basic principles of membrane separation, types of membranes/modules, synthesis, and characterization of new membrane materials with citation of recent works on this novel separation process.

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A novel semi-aromatic polyamide TFC reverse osmosis membrane fabricated from a dendritic molecule of trimesoylamidoamine through a two-step amine-immersion mode

Abstract: In this work, a novel semi-aromatic polyamide RO membrane was fabricated from a new dendritic molecule of trimesoylamidoamine (TMAAM) combined 1,3-diamino-2-propanol (DAP) to react with trimesoyl chloride (TMC) via a new two-step amine immersion method.

Cited by 17 publications

References 43 publications

Modification of polyamide TFC nanofiltration membrane for improving separation and antifouling properties

Modification of polyamide TFC nanofiltration membrane for improving separation and antifouling properties

Comparative impact of SiO₂ and TiO₂ nanofillers on the performance of thin‐film nanocomposite membranes

Membrane Technology

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A novel semi-aromatic polyamide TFC reverse osmosis membrane fabricated from a dendritic molecule of trimesoylamidoamine through a two-step amine-immersion mode

Abstract: In this work, a novel semi-aromatic polyamide RO membrane was fabricated from a new dendritic molecule of trimesoylamidoamine (TMAAM) combined 1,3-diamino-2-propanol (DAP) to react with trimesoyl chloride (TMC) via a new two-step amine immersion method.

Cited by 17 publications

References 43 publications

Modification of polyamide TFC nanofiltration membrane for improving separation and antifouling properties

Modification of polyamide TFC nanofiltration membrane for improving separation and antifouling properties

Comparative impact of SiO2 and TiO2 nanofillers on the performance of thin‐film nanocomposite membranes

Membrane Technology

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Comparative impact of SiO₂ and TiO₂ nanofillers on the performance of thin‐film nanocomposite membranes