Metal-organic composite membrane with sub-2 nm pores fabricated via interfacial coordination

Yu-jie, Shen; Fang, Li‐Feng; Yan, Yan; Yuan, Jiajia; Gan, Zhiqiang; Wei, Xiuzhen; Zhu, Bao‐Ku

doi:10.1016/j.memsci.2019.05.070

Cited by 39 publications

(20 citation statements)

References 45 publications

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“…24−27 It was reported that the TA-Fe 3+ nanofilm could be prepared in various biphasic systems through an IP reaction process using ferric acetylacetonate (Fe(acac) 3 ) as the Fe 3+ source in the organic phase. 28 Then, Shen et al 29 fabricated a TA-Fe 3+ composite NF membrane via the same strategy through the IP reaction using n-hexane as the organic phase. Accordingly, we hypothesized that the TA-Fe 3+ chelating film could be integrated with the PA layer in a facile one-step IP process to obtain a (TA-Fe 3+ )-PA composite membrane (Figure 1a).…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Antiswelling Loose Nanofiltration Membranes via a “Selective-Etching-Induced Reinforcing” Strategy for Bioseparation

Guo

Zhang

Chen

et al. 2021

ACS Appl. Mater. Interfaces

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With diverse selectivity, higher permeance, and good antifouling property, loose polyamide nanofiltration (NF) membranes can be potentially deployed in various bioseparation applications. However, the loose NF membrane with a low crosslinking degree generally suffers from the alkali-induced pore swelling during chemical cleaning, resulting in degradation of separation performance with time. In this work, we conceive a novel strategy to tailor the separating layer through alkaline post-etching following the interfacial polymerization process, where piperazine and tannic acid (TA) were used as water-phase monomers, and trimesoyl chloride (TMC) and ferric acetylacetonate were employed as organic monomers in n-hexane. Thereinto, the polyester network formed by TA and TMC was selectively etched by alkaline treatment, thus obtaining a loose NF membrane, whose structure and performance could be facilely tailored by controlling the TA ratio and the etching pH. As a result, the well-designed loose NF membrane exhibited higher flux, better selectivity, and more stable separation performance in a long-term filtration of diluted cane molasses. Interestingly, the obtained loose NF membrane showed excellent antiswelling ability during alkaline cleaning because of network locking induced by Fe3+ chelation, decrease in the carboxyl proportion (more hydroxyl generation due to the ester bond hydrolysis), and enhanced interface interaction between the separation layer and the sublayer attributed to catechol adhesion effect. Therefore, such a “selective-etching-induced reinforcing” strategy could endow the polyamide NF membrane with both loose and antiswelling separation layer in a reliable and scalable way, which provides a new perspective for preparing highly selective and stable NF membrane for resource recovery.

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Section: Introductionmentioning

confidence: 99%

Fabrication of Antiswelling Loose Nanofiltration Membranes via a “Selective-Etching-Induced Reinforcing” Strategy for Bioseparation

Guo

Zhang

Chen

et al. 2021

ACS Appl. Mater. Interfaces

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“…Nanocoating can ensure film uniformity for nano/micrometer-sized objects. The material-independent, universal MPN nanocoating have been extensively used in biomedical materials, environmental science, and daily life, such as antibacterial coating of biomedical devices [ 59 ], anti-moisture coating of glasses [ 60 ], water–oil biphasic separation [ 19 ], inorganic salt nanofiltration membrane [ 61 ] and facile inking for writing [ 62 ], etc. Although there are various fascinating functionalities endowed by MPN nanocoatings, they are largely confined to phenolic acid TA-MPN system and usually one-sided functionality.…”

Section: Resultsmentioning

confidence: 99%

Material priority engineered metal-polyphenol networks: mechanism and platform for multifunctionalities

et al. 2022

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Engineering the surface of materials with desired multifunctionalities is an effective way to fight against multiple adverse factors during tissue repair process. Recently, metal-polyphenol networks (MPNs) have gained increasing attention because of their rapid and simple deposition process onto various substrates (silicon, quartz, gold and polypropylene sheets, etc.). However, the coating mechanism has not been clarified, and multifunctionalized MPNs remain unexplored. Herein, the flavonoid polyphenol procyanidin (PC) was selected to form PC-MPN coatings with Fe3+, and the effects of different assembly parameters, including pH, molar ratio between PC and Fe3+, and material priority during coating formation, were thoroughly evaluated. We found that the material priority (addition sequence of PC and Fe3+) had a great influence on the thickness of the formed PC-MPNs. Various surface techniques (e.g., ultraviolet–visible spectrophotometry, quartz crystal microbalance, X-ray photoelectron spectroscopy, atomic force microscopy, and scanning electron microscopy) were used to investigate the formation mechanism of PC-MPNs. Then PC-MPNs were further engineered with multifunctionalities (fastening cellular attachment in the early stage, promoting long-term cellular proliferation, antioxidation and antibacterial activity). We believe that these findings could further reveal the coating formation mechanism of MPNs and guide the future design of MPN coatings with multifunctionalities, thereby greatly broadening their application prospects, such as in sensors, environments, drug delivery, and tissue engineering. Graphical Abstract

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“…2. Contributions to environmental engineering : Inspired by the strong phenolic bonding force on almost all surfaces and the tailored pore size of the metal–phenolic network, a nanofiltration membrane with MPNs was prepared and applied in surface water purification, seawater desalination, wastewater reclamation, etc. − Natural metal–phenolic networks that possess excellent hydrophilicity and are easy to prepare on a large scale are ideal candidates for antifouling coatings. ,, Notably, the wettability of the metal–polyphenol network can be reversed, which shows excellent oil/water separation efficiency and good dye absorption capacity by synthesizing catechol derivatives with different hydrophobic alkyl/aryl substituents …”

Section: Resultsmentioning

confidence: 99%

Silanization of a Metal–Polyphenol Coating onto Diverse Substrates as a Strategy for Controllable Wettability with Enhanced Performance to Resist Acid Corrosion

Cheng

Zhang

et al. 2021

Langmuir

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Wettability is a crucial characteristic of materials that plays a vital role in surface engineering. Surface modification is the key to changing the wettability of materials, and a simple and universal modification approach is being extensively pursued by researchers. Recently, metal−phenolic networks (MPNs) have been widely studied because they impart versatility and functionality in surface modification. However, an MPN is not stable for long periods, especially under acidic conditions, and is susceptible to pollution by invasive species. Spurred by the versatility of MPNs and various functionalities achieved by silanization, we introduce a general strategy to fabricate functionally stable coatings with controllable surface wettability by combining the two methods. The formation process of MPN and silane−MPN coatings was characterized by spectroscopic ellipsometry (SE), UV−visible−near-infrared (UV−vis−NIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), atomic force microscopy (AFM), water contact angle (WCA), etc. We found that the stability of the MPN was greatly enhanced after silanization, which is attributed to the cross-linking effect that occurs between silane and the MPN, namely, the cross-linking protection produced in this case. Additionally, the wettability of an MPN can be easily changed through our strategy. We trust that our strategy can further extend the applications of MPNs and points toward potential prospects in surface modification.

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Metal-organic composite membrane with sub-2 nm pores fabricated via interfacial coordination

Cited by 39 publications

References 45 publications

Fabrication of Antiswelling Loose Nanofiltration Membranes via a “Selective-Etching-Induced Reinforcing” Strategy for Bioseparation

Fabrication of Antiswelling Loose Nanofiltration Membranes via a “Selective-Etching-Induced Reinforcing” Strategy for Bioseparation

Material priority engineered metal-polyphenol networks: mechanism and platform for multifunctionalities

Silanization of a Metal–Polyphenol Coating onto Diverse Substrates as a Strategy for Controllable Wettability with Enhanced Performance to Resist Acid Corrosion

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