Surface-tailoring chlorine resistant materials and strategies for polyamide thin film composite reverse osmosis membranes

Goh, Pei Sean; Wong, Kar Chun; Wong, Tuck Whye; Ismail, Ahmad Fauzi

doi:10.1007/s11705-021-2109-z

Cited by 12 publications

(4 citation statements)

References 156 publications

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“…Unfortunately, pH and chlorine treatments degrade the polyamide selective film properties and performance [31][32][33]. Thus, there have been longstanding research efforts to develop membranes resistant to chlorine with a wide pH operating range [31,[34][35][36]. One strategy is to utilize different monomers to increase chlorine and pH stability [9].…”

Section: Ip Challenges and The Modifications Used To Address Themmentioning

confidence: 99%

“…It was also discovered that the mechanical behavior of polyamide films post-chlorination correlates to membrane performance, thus providing valuable insight into the effects of membrane chemistry and structure [59,119]. This enables development of a new generation of pH and chlorine-resistant membranes [36,180,181]. While there are a few studies of IP film behavior and properties following chlorination, there are no known reports regarding chlorinated MLD polyamide films.…”

Section: Porous Supportmentioning

confidence: 99%

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Characterization of Polyamide Thin Films by Atomic Force Microscopy

McIntee,

Sreedhar,

Welch

et al. 2024

Preprint

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Section: Ip Challenges and The Modifications Used To Address Themmentioning

confidence: 99%

Section: Porous Supportmentioning

confidence: 99%

Characterization of Polyamide Thin Films by Atomic Force Microscopy

McIntee,

Sreedhar,

Welch

et al. 2024

Preprint

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“…Similar kinds of issues are expected in appointing dual-layered membranes for the process of removing boron from seawater, as they have a low tolerance to oxidants and chemicals, and a chemical membrane cleaning process can cause degradation. Surface-tailoring chlorine resistance materials have been accomplished in developing polyamide thin-film membranes for the reverse osmosis process, indicating that this minor issue can possibly be tackled with certain moderations of dual-layered membranes [177]. Several literature reviews suggested solutions regarding the reactivity of chlorine with membrane [178][179][180][181][182].…”

Section: Challenges and Future Prospectsmentioning

confidence: 99%

Adsorptive Membrane for Boron Removal: Challenges and Future Prospects

et al. 2022

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The complexity of removing boron compounds from aqueous systems has received serious attention among researchers and inventors in the water treating industry. This is due to the higher level of boron in the aquatic ecosystem, which is caused by the geochemical background and anthropogenic factors. The gradual increase in the distribution of boron for years can become extremely toxic to humans, terrestrial organisms and aquatic organisms. Numerous methods of removing boron that have been executed so far can be classified under batch adsorption, membrane-based processes and hybrid techniques. Conventional water treatments such as coagulation, sedimentation and filtration do not significantly remove boron, and special methods would have to be installed in order to remove boron from water resources. The blockage of membrane pores by pollutants in the available membrane technologies not only decreases their performance but can make the membranes prone to fouling. Therefore, the surface-modifying flexibility in adsorptive membranes can serve as an advantage to remove boron from water resources efficiently. These membranes are attractive because of the dual advantage of adsorption/filtration mechanisms. Hence, this review is devoted to discussing the capabilities of an adsorptive membrane in removing boron. This study will mainly highlight the issues of commercially available adsorptive membranes and the drawbacks of adsorbents incorporated in single-layered adsorptive membranes. The idea of layering adsorbents to form a highly adsorptive dual-layered membrane for boron removal will be proposed. The future prospects of boron removal in terms of the progress and utilization of adsorptive membranes along with recommendations for improving the techniques will also be discussed further.

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“…The applications of nanofillers such as covalent organic frameworks (COFs), metal–organic frameworks (MOFs), layered double hydroxides (LDHs), carbon-based nanoparticles, and graphene oxides have been extensively researched for enhanced separation performance. ,,− Traditionally, the incorporation of nanofillers can be done either in the aqueous or organic phase for interfacial polymerization, predeposition in the sublayer, or as coating postpolymerization . Other strategies like molecular plug, steric hindrance, surface tailoring, and surface charge introduction have also been reported to enhance chlorine-resistance in membranes. − …”

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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Surface-tailoring chlorine resistant materials and strategies for polyamide thin film composite reverse osmosis membranes

Cited by 12 publications

References 156 publications

Characterization of Polyamide Thin Films by Atomic Force Microscopy

Characterization of Polyamide Thin Films by Atomic Force Microscopy

Adsorptive Membrane for Boron Removal: Challenges and Future Prospects

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

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