Electrospray interface-less polymerization to fabricate high-performance thin film composite polyamide membranes with controllable skin layer growth

Ma, Zhongbao; Ren, Long‐Fei; Ying, Deng; Jia, Jinping; Shao, Jiahui

doi:10.1016/j.memsci.2021.119369

Cited by 25 publications

(5 citation statements)

References 51 publications

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“…The specific surface area of C-IPN4 starts to decrease and the micropore volume decreases. Because the polymerization reaction intensifies with the increase of dimethylamine content, which results in a larger degree of polymerization of the oligomers generated under the same conditions, only a small portion of the oligomers are adsorbed into the PAAS molecular network leading to interpenetration and pore formation. , The apparent hysteresis backline is due to the association of some micropores, compared to the total pore volume of 0.384 cm 3 g –1 for C-IPN5, which is slightly less compared to 0.473 cm 3 g –1 for C-IPN4. This result is due to the excessive etching of the carbon skeleton by sodium, leading to the collapse of the pore size, which is confirmed by the data in Table .…”

Section: Resultsmentioning

confidence: 99%

Influence of Subnanoporous Carbon with a Customizable Pore Structure on Aqueous Supercapacitors

Zhang

Hou

et al. 2022

ACS Appl. Energy Mater.

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The pore structure of carbon-based materials is one of the determinants of supercapacitor performance. In this paper, a series of subnanoporous carbon materials are prepared by one-step carbonization of interpenetrating polymers, which could not only accurately control the pore size at 0.6 nm but also change the degree of polymerization of dimethylamine formaldehyde resin. The pore structure parameters of the proportion of subnanometer micropores are regulated through carbonization. The pores of the prepared porous carbon are extracted by pyrolysis of sodium polyacrylate, synergistic pore-forming effect of generated gaseous species, and sodium salt etching. Among them, C-IPN3 possesses the highest total specific surface area (575 m2 g–1). The S BET of subnanometer pores is as high as 93.4% with good specific capacitance of 239.1 F g–1 at 0.5 A g–1. In alkaline electrolyte, it shows 82% of capacity retention of its initial capacitance with 20-fold expansion of current density indicating excellent rate capability. In addition, speaking of a symmetric capacitor device, the results show an energy density of 7.57 W h Kg–1 at a power density of 62.5 W Kg–1. This simple and low-cost device, which achieves effective regulation of the pore structure, could also be used as the advanced electrode for supercapacitors.

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Section: Resultsmentioning

confidence: 99%

Influence of Subnanoporous Carbon with a Customizable Pore Structure on Aqueous Supercapacitors

Zhang

Hou

et al. 2022

ACS Appl. Energy Mater.

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“…The resulting polymer membrane forms the selective layer of the TFC membrane that is endowed with the desired separation properties [ 144 ]. However, with advancements in membrane science and engineering, new strategies for integrating the support layer and selective layer have emerged [ 145 , 146 , 147 ]. These modern approaches offer enhanced control over membrane properties and performance.…”

Section: Effect Of Structural Properties and Patterns In Supports On ...mentioning

confidence: 99%

“…However, a longer synthesis time was required for the PA layer due to the slow release of liquid from electrospray, multiple sprayings, and the low rate of speed of the porous substrate. Spray techniques have been widely explored for the preparation of selective layers on porous substrates [ 147 , 167 , 168 ]. For instance, Wang et al [ 169 ] used ultrafiltration substrates that contained distinct fibrous layers: PET non-woven, electrospun PAN nanofibrous, and ultra-fine cellulose nanofibers (CNs).…”

Section: Effect Of Structural Properties and Patterns In Supports On ...mentioning

confidence: 99%

Development of Support Layers and Their Impact on the Performance of Thin Film Composite Membranes (TFC) for Water Treatment

et al. 2023

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Thin-film composite (TFC) membranes have gained significant attention as an appealing membrane technology due to their reversible fouling and potential cost-effectiveness. Previous studies have predominantly focused on improving the selective layers to enhance membrane performance. However, the importance of improving the support layers has been increasingly recognized. Therefore, in this review, preparation methods for the support layer, including the traditional phase inversion method and the electrospinning (ES) method, as well as the construction methods for the support layer with a polyamide (PA) layer, are analyzed. Furthermore, the effect of the support layers on the performance of the TFC membrane is presented. This review aims to encourage the exploration of suitable support membranes to enhance the performance of TFC membranes and extend their future applications.

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“…These are crucial factors that influence the inherent permeability and water/ion permselectivity of the membrane. − Previous research has unequivocally established that the selection of cosolvents and fabrication techniques are critical strategies for effectively managing the thickness of PA film and the size of the nanopores. − In a seminal study, Choi et al (2015) successfully prepared a PA membrane via molecular layer-by-layer assembly utilizing polyelectrolytes, which resulted in a remarkable 98.2% NaCl rejection and 23.0 L m –2 h –1 water flux . Further research in this domain is focused on enhancing water permeance by reducing the thickness to the nanoscale and introducing nanovoids into the sublayers using techniques such as electrospray, nanofoaming, and nanobubbling. ,− Of these, spray-assisted fabrication has been shown to provide tunable thickness and pore size while ensuring high dispersibility of nanofillers. − Nevertheless, the degradation of the PA layer due to chlorination remains the primary factor inhibiting the widespread adoption of this membrane technology in heavily polluted environments, where chlorine cleaning is a necessity. , …”

Section: Introductionmentioning

confidence: 99%

Electrospray Fabrication of Ultrathin Chlorine-Resistant Polyamide Brackish Water Desalination Membrane with Protonated Montmorillonite Nanoplates

Ee,

Chia,

2023

ACS Appl. Polym. Mater.

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This research presents an innovative approach to the in situ interfacial polymerization of m-phenylenediamine (MPD) and trimesoyl chloride (TMC) through the application of an electrospray fabrication method. The process incorporates exfoliated protonated montmorillonite nanoclay (MMT-H+) to modulate the diffusivity and reaction kinetics of the monomers, resulting in the successful fabrication of sub-5 nm polyamide thin films. The inclusion of 0.03% w/v MMT-H+ nanoplates in the thin-film nanocomposite membrane (PA_0.3HMMT) yields a remarkable resistance to chlorine degradation, withstanding up to 6,000 ppm·h of free chlorine exposure. This resistance prevents possible hydrolysis of the polyamide active layer during membrane cleaning. The resultant TFN membrane exhibits a high salt rejection of over 93.0% in brackish water reverse osmosis applications. Interestingly, chlorine treatment enhances the water permeance of the PA_0.3HMMT TFN membrane by 10.2% upon 2,000 ppm·h free chlorine exposure, without compromising salt rejection performance. The combination of the electrospray fabrication technique and MMT-H+ nanoclay integration offers a sustainable membrane solution for both seawater desalination and wastewater treatment. This study thus highlights the potential for significant advancements in water treatment technologies.

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Electrospray interface-less polymerization to fabricate high-performance thin film composite polyamide membranes with controllable skin layer growth

Cited by 25 publications

References 51 publications

Influence of Subnanoporous Carbon with a Customizable Pore Structure on Aqueous Supercapacitors

Influence of Subnanoporous Carbon with a Customizable Pore Structure on Aqueous Supercapacitors

Development of Support Layers and Their Impact on the Performance of Thin Film Composite Membranes (TFC) for Water Treatment

Electrospray Fabrication of Ultrathin Chlorine-Resistant Polyamide Brackish Water Desalination Membrane with Protonated Montmorillonite Nanoplates

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