Halloysite Nanotube-Ferrihydrite Incorporated Polyethersulfone Mixed Matrix Membrane: Effect of Nanocomposite Loading on the Antifouling Performance

Ikhsan, Syarifah Nazirah Wan; Yusof, Norazah; Nawi, Normi Izati Mat; Bilad, Muhammad Roil; Shamsuddin, Norazanita; Aziz, Farhana; Ismail, Ahmad Fauzi

doi:10.3390/polym13030441

Cited by 12 publications

(4 citation statements)

References 61 publications

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“…Typically the first product of Fe(III) hydrolysis or rapid oxidation of aqueous Fe(II), this poorly crystalline nanomineral with a 2–10 nm grain size can be found across a diversity of soil and aquatic environments on Earth 1 . In industry, its high reactive surface area and cost-effectiveness make it a potent sorbent for water purification 2 , 3 and catalysis 4 . However, as a poorly ordered material, it has remained difficult for X-ray diffraction (XRD) and scattering techniques to precisely determine its structure, beyond providing an indication of major ferrihydrite types distinguished by the number of peaks present in the XRD pattern.…”

Section: Introductionmentioning

confidence: 99%

Ab initio thermodynamics reveals the nanocomposite structure of ferrihydrite

2021

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Ferrihydrite is a poorly crystalline iron oxyhydroxide nanomineral that serves a critical role as the most bioavailable form of ferric iron for living systems. However, its atomic structure and composition remain unclear due in part to ambiguities in interpretation of X-ray scattering results. Prevailing models so far have not considered the prospect that at the level of individual nanoparticles multiple X-ray indistinguishable phases could coexist. Using ab initio thermodynamics we show that ferrihydrite is likely a nanocomposite of distinct structure types whose distribution depends on particle size, temperature, and hydration. Nanoparticles of two contrasting single-phase ferrihydrite models of Michel and Manceau are here shown to be thermodynamically equivalent across a wide range of temperature and pressure conditions despite differences in their structural water content. Higher temperature and water pressure favor the formation of the former, while lower temperature and water pressure favor the latter. For aqueous suspensions at ambient conditions, their coexistence is maximal for particle sizes up to 12 nm. The predictions inform and help resolve different observations in various experiments.

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Section: Introductionmentioning

confidence: 99%

Ab initio thermodynamics reveals the nanocomposite structure of ferrihydrite

2021

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“…A series of symmetric flat sheet halloysite nanotubeferri-hydrates (HNT-HFO) (0.5, 1.0, 1.5 and 2.0 wt.%)embedded PES membranes were fabricated by using the immersion precipitation phase inversion technique with methyl-2-pyrrolidone (NMP) as the solvent [43]. The flux recovery ratio of the membranes increased with the increased loading of nanocomposite, which clearly demonstrates the improved AF ability of such nanocomposite membranes.…”

Section: Antifouling (Af) Of Mixed Matrix Nanocomposite Membranesmentioning

confidence: 98%

Nanomaterials and Nanotechnologies for Marine and Membrane Antifouling Applications

Ramasrinivasan,

Srinivasan,

Radha

et al. 2023

J. Res. Updates Polym. Sci.

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The major responsibility of the marine industry includes the global transportation of goods, materials, and people. To cater the longstanding challenges like degradation of materials and biofouling, it has embraced nanotechnology solutions. Nano-technology offered numerous products such as nano-ZnO, nano alumina, and nano silica, etc. to deal with corrosion in a cost-effective manner. Similarly, to address the biofouling in the aquatic environment, hybrid nanocomposites of organic-inorganic materials, photocatalytic nanomaterials, metal and metal oxide nanomaterials (nanoparticles, nanowires, nanorods), etc. are employed as viable agents to create non-toxic or low-toxic antifouling coatings. On the other hand, membrane separation technology plays a significant role in various industries including water treatment plants, food, medicine, pharmacy, biotechnology, etc. in addition to the domestic arena for the purification of drinking water. Such a wonderful technology is being totally disturbed by a troublesome problem and a predominant barrier called membrane fouling, which drastically limits the commercialization of the membranes and the whole membrane industrial technology as well. Hence, this review exclusively throws light on the role of nanomaterials and nanotechnologies developed for the prevention of fouling that occurs on submerged structures and membranes as well and to give possible solutions with increased resilience against challenges to come.

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“…However, this polymer suffers a major disadvantage concerning its hydrophobic character. Hydrophobicity in the membrane facilitates high adsorption of organic compounds on the membrane surface, which leads to membrane fouling [101,102]. The antifouling performance of C60-ZSM-22/PES and F60-ZSM-22/PES NF membranes is shown in Figure 10.…”

Section: Membranes Fouling Analysis Antifouling Analysismentioning

confidence: 99%

Influence of the Zeolite ZSM-22 Precursor on a UF-PES Selective Substrate Layer for Salts Rejection

2022

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Fabrication of the ZSM-22/Polyethersulfone (ZSM-22/PES) membranes as selective salt filters represent a growing membrane technological area in separation with the potential of high economic reward based on its low energy requirements. The incorporation of ZSM-22 zeolite material as additives into the PES polymer matrix has the prospective advantage of combining both the zeolite and polymer features while overcoming the limitations associated with both materials. This work investigated the influence of the nature of the silica precursor on ZSM-22 zeolite hydrothermally synthesised using colloidal (C60) and fumed (C60) silica to Si/Al of 60. The successful synthesis of the highly crystalline zeolitic materials was confirmed through XRD, FTIR, and SEM with EDX. The ZSM-22 additives were directly dispersed into a PES polymeric matrix to form a casting solution for the preparation of the ZSM-22/PES selective substrate layers via a phase inversion method for salts rejection. The polymeric PES was selected as an organic network in which the content of the ZSM-22 zeolite (ranging between 0 and 1.0 wt.%), was obtained and characterised by XRD, FTIR, and SEM analysis, as well as water contact angle (WCA) measurement and dead-end filtration cell. The phase inversion preparation method has induced the resulting ZSM-22/PES NF substrates anisotropy, as attributed to a high water flux to the above 700 L·m−2·h−1; high selectivity and rejection of salts to above 80% is revealed by the obtained results. The materials also exhibited improved antifouling behavior to above 70% flux recovery ratios. As such, the nature of the silica precursor influences ZSM-22 zeolite synthesis as a potential additive in the PES polymer matrix and led to the enhanced performance of the pure PES ultrafiltration membrane.

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Halloysite Nanotube-Ferrihydrite Incorporated Polyethersulfone Mixed Matrix Membrane: Effect of Nanocomposite Loading on the Antifouling Performance

Cited by 12 publications

References 61 publications

Ab initio thermodynamics reveals the nanocomposite structure of ferrihydrite

Ab initio thermodynamics reveals the nanocomposite structure of ferrihydrite

Nanomaterials and Nanotechnologies for Marine and Membrane Antifouling Applications

Influence of the Zeolite ZSM-22 Precursor on a UF-PES Selective Substrate Layer for Salts Rejection

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