Hybrid polymer/MOF membranes for Organic Solvent Nanofiltration (OSN): Chemical modification and the quest for perfection

Campbell, J. Peter; Burgal, João; Székely, György; Davies, Robert P.; Braddock, D. Christopher; Livingston, Andrew G.

doi:10.1016/j.memsci.2016.01.024

Cited by 139 publications

(55 citation statements)

References 49 publications

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“…First, the presence of the metal nodes or linkers provides nucleation sites for the growth of MOF. Second, this functionalization improves the adhesion of the MOF layer directly to the substrate . It is well‐known that the nitrile functional groups could undergo hydrolysis in alkaline solutions to yield carboxylic acid groups.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, just as Campbell et al. successfully utilized the nonwaterstable HKUST‐1 in OSN, our example also further validated that such MOFs could find potential use in nonaqueous applications.…”

Section: Resultsmentioning

confidence: 99%

“…To forego the need for additional polymeric layers, attempts have also been made to prepare a MOF selective layer directly on a prepared polymeric membrane. Methods range from the in situ growth method established by Campbell et al . to interfacial polymerization methods in which the MOF layer grows at the interface of two immiscible liquids .…”

Section: Introductionmentioning

confidence: 99%

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Green Layer‐by‐Layer Method for the Preparation of Polyacrylonitrile‐Supported Zinc Benzene‐1,4‐dicarboxylic Acid Membranes

et al. 2018

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Ultrafiltration-level polyacrylonitrile (PAN) flat sheet membranes were chemically modified through cross-linking and hydrolysis to provide a suitable surface for the growth of a selective layer composed of a Zn benzene-1,4-dicarboxylic acid (Zn(BDC)) metal-organic framework (MOF). Unlike typical membrane modification methods or conventional MOF synthesis procedures, deionized (DI) water was the only solvent used for each of the modification steps. To better understand the layer-by-layer MOF growth process, several MOF growth conditions were also studied, including the effects of solution concentration, growth temperature, membrane immersion time and the number of layers. Subsequently, organic solvent nanofiltration (OSN) was used to test the effectiveness of the modifications and compare the performances of the fabricated membranes. With the appropriate combination of the MOF growth conditions, the layer-by-layer method was used to produce an OSN membrane with an isopropanol permeance of 2.39 L m h bar and an 86 % rejection of the dye Brilliant Blue R (M 825.97 g mol ).

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Green Layer‐by‐Layer Method for the Preparation of Polyacrylonitrile‐Supported Zinc Benzene‐1,4‐dicarboxylic Acid Membranes

et al. 2018

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“…Adapting the membrane morphology to improve specific properties, such as anti-biofouling, is not only possible by modifying the membrane surface but also by optimizing inner structure. Mixed matrix membranes (MMM) developed to achieve the formation of asymmetric membrane by interpenetrating functionalized inorganic particles and a polymeric matrix [8,9]. By employing MMM,…”

Section: Introductionmentioning

confidence: 99%

High-Throughput Microfiltration Membranes with Natural Biofouling Reducer Agent for Food Processing

et al. 2018

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The effect of natural antibiotics Moringa oleifera seeds powder in cellulose acetate membranes as biofouling reducer agent was investigated. Mixed matrix membranes (MMM) were synthesized by adding 100 mesh M. oleifera seeds powder with variation of three concentrations (1 wt%, 2 wt%, and 3 wt%), into a mix polymer solution of CA (cellulose acetate) and two different solvents, i.e., DMF (dimethylformamide) and DMAc (dimethylacetamide). The synthesized membranes morphology was observed under scanning electron microscopy and from the images can be seen that the membranes made of DMAc formed rather large macrovoid as compared to DMF-based membranes. The microstructure affected the water flux through the membranes, in which the DMAc membranes provided a higher flux value and served as high-throughput microfiltration membranes. Antibacterial properties of MMM were tested using Escherichia coli adhesion onto membrane surfaces. The results showed that M. oleifera has been proven to eradicate E. coli activity on the membrane surfaces due to interaction between bacterial cells and phenolic compounds from M. oleifera, through absorption processes involving hydrogen bonds. two or more different properties of components combined, to achieve a better separation performance. In order to promote antifouling properties, some combination of functionalized fillers and polymer matrixes have been used, such as a combination of nanoparticles of anatase TiO 2 /polysulfone [10] and Ag-loaded graphene oxide/polyethersulfone [11]. Those combination were effective, however the use of metal components as fillers, e.g., silver particles, might be unsafe for membrane that is used for food processing application. The use of plant-based subtances, might provide a more reliable and safe anti-biofoulant, such as the utilization of cardanol [12]. In this study, a natural antibacterial M. oleifera seeds powder is evaluated to be employed as filler to the cellulose acetate polymer matrix to form anti-biofouling MMM.M. oleifera could be utilized against Gram positive and negative bacteria [13]. Recombinant protein inside M. oleifera seeds is able to agglomerate Gram positive and negative bacterial cells [14]. By its properties, Moringa seeds could potentially be used as for environmentally friendly antibiofouling, because these natural ingredients are not harmful, even if used in large quantities when compared with chemicals or metals that are commonly used as agents to reduce biofouling.As for polymeric matrix, cellulose acetate has been chosen due to some beneficial properties. Cellulose acetate has good properties as a membrane polymer for food processing due to renewable, biodegradable, biocompatible, non-toxic, and inexpensive subtances [15,16]. Cellulose acetate has relatively thermal and chemical stability [17], because cellulose has a rich of hydroxyl groups and it is able to form a strong hydrogen bonds that could not be separated easily [18]. Cellulose acetate are also extraordinary hydrophilic, which can be used for minimizing fouling on t...

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“…To improve the performances of ISG membranes, chemical modification was performed. They found that chemically modified ISG membranes outperformed non-modified ISG membranes in both solute retentions and permeance [25]. Mohammed et al reported that platinummetallated porphyrin (Pt(II)TMPyP) was successfully encapsulated in a rho-type zeolite-like metal-organic framework (rho-ZMOF) and applied for anion-selective sensing.…”

Section: Introductionmentioning

confidence: 99%

Modification Effects of B2O3 on The Structure and Catalytic Activity of WO3-UiO-66 Catalyst

Yang

Miao

et al. 2018

Nanomaterials

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Tungsten oxide (WO3) and boron oxide (B2O3) were irreversibly encapsulated into the nanocages of the Zr-based metal organic framework UiO-66, affording a hybrid material B2O3-WO3/UiO-66 by a simple microwave-assisted deposition method. The novel B2O3-WO3/UiO-66 material was systematically characterized by X-ray diffraction, Fourier transform infrared spectroscopy, N2 adsorption, ultraviolet–visible diffuse reflectance spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray phosphorescence, and Fourier transform infrared (FTIR)-CO adsorption methods. It was found that WO3 and B2O3 were highly dispersed in the nanocages of UiO-66, and the morphology and crystal structure of UiO-66 were well preserved. The B2O3 species are wrapped by WO3 species, thus increasing the polymeric degree of the WO3 species, which are mainly located in low-condensed oligomeric environments. Moreover, when compared with WO3/UiO-66, the B2O3-WO3/UiO-66 material has a little weaker acidity, which decreased by 10% upon the B2O3 introduction. The as-obtained novel material exhibits higher catalytic performance in the cyclopentene selective oxidation to glutaraldehyde than WO3/UiO-66. The high catalytic performance was attributed to a proper amount of B2O3 and WO3 with an appropriate acidity, their high dispersion, and the synergistic effects between them. In addition, these oxide species hardly leached in the reaction solution, endowing the catalyst with a good stability. The catalyst could be used for six reaction cycles without an obvious loss of catalytic activity.

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Hybrid polymer/MOF membranes for Organic Solvent Nanofiltration (OSN): Chemical modification and the quest for perfection

Abstract: One of the main challenges in the field of organic solvent nanofiltration (OSN) is

Cited by 139 publications

References 49 publications

Green Layer‐by‐Layer Method for the Preparation of Polyacrylonitrile‐Supported Zinc Benzene‐1,4‐dicarboxylic Acid Membranes

Green Layer‐by‐Layer Method for the Preparation of Polyacrylonitrile‐Supported Zinc Benzene‐1,4‐dicarboxylic Acid Membranes

High-Throughput Microfiltration Membranes with Natural Biofouling Reducer Agent for Food Processing

Modification Effects of B2O3 on The Structure and Catalytic Activity of WO3-UiO-66 Catalyst

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