Metal–Organic Framework-Functionalized Alumina Membranes for Vacuum Membrane Distillation

Zuo, Jian; Chung, Tai‐Shung

doi:10.3390/w8120586

Cited by 54 publications

(30 citation statements)

References 60 publications

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“…The effect of hydrothermal growth hours of MIL‐53 on morphology of M‐ X was investigated (Figure ). Results showed that the surface morphology as well as hydrophilicity of the substrates can be controlled by tuning the MOF growth process, which can also be verified by previous research . The seed particles with small size are evenly distributed on the surface of the support due to the connection between H 2 BDC and Al on the substrate surface (Figure S9, Supporting Information).…”

supporting

confidence: 80%

A Novel Metal–Organic Framework (MOF)–Mediated Interfacial Polymerization for Direct Deposition of Polyamide Layer on Ceramic Substrates for Nanofiltration

Bao

Chen

Wang

et al. 2019

Adv Materials Inter

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by the relatively rough surface of ceramic membranes as well as the weak interaction between organics and inorganics. Generally, an intergrown polymeric intermediate layer would be needed to facilitate the IP fabrication on ceramic substrates. [12,14] However, the weak physical connection between the substrate and the selective layer makes the membrane neither stable nor robust, especially in high pressure filtration system, like nanofiltration. It would be a great opportunity to grow a robust PA layer on ceramic substrate as the next-generation composite membrane for the high-pressure filtration application.When organic-inorganic composites were taken into account, metal-organic frameworks (MOFs) are surely to be one good example in which organic and inorganic structures are well-connected. [15] MOFs are usually synthesized by combining a hydrated metal salt and organic linker using hydrothermal or solvothermal method. [16] Therefore, it is possible to link the MOF layer and the ceramic substrate by chemical reaction followed by PA layer formation via IP.Our hypothesis for this work is to synthesize a robust PA selective layer on Al 2 O 3 ceramic substrates via chemical bonding. It could be achieved by direct IP process with the assistance of a well-known Al-based MOF structure MIL-53 (Al) (Al(OH)(C 6 H 4 (COO) 2 )) as the intermediate connection layer (Figure 1). The chemical bonding between MIL-53 and PA layer could be formed via hydrogen bond and dehydration condensation ( Figure S2, Supporting Information). The chemical connection of the composite membrane was investigated and the membrane performance (pure water flux and rejection) was tested. This method would provide a new idea to make organicinorganic composite membranes for water treatment.To investigate the MIL-53 growth mechanism, the particles prepared at different hydrothermal hours were collected and characterized. X-ray diffraction (XRD) patterns ( Figure S4, Supporting Information) show that at the seed growth stage (Stage I), the organic linker could be recrystallized and is identified as H 2 BDC (C 8 H 6 O 4 , benzene-1,4-dicarboxylic acid, Entry No. 00-021-1919). At the MIL-53 growth stage (Stage II), pure MIL-53 crystals could be generated, all peaks in the XRD patterns can be matched well with the simulated patterns (Entry No. 00-067-0849, Figure S5, Supporting Information). Even the hydrothermal growth time has no significant effect on the crystal structure, it does affect the morphology and the crystal size of MIL-53 powders observed from field emission scanning A facile metal-organic framework (MOF)-mediated interfacial polymerization (IP) method is developed to prepare a polyamide (PA) layer directly on the ceramic substrate for nanofiltration. MOF is introduced to connect ceramic substrate and PA layer via chemical bonding, resulting in a robust separation layer. The optimization of IP can be controlled by MOF growth process via tuning the surface roughness as well as hydrophilicity. This method will provide a new way for the preparatio...

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supporting

confidence: 80%

A Novel Metal–Organic Framework (MOF)–Mediated Interfacial Polymerization for Direct Deposition of Polyamide Layer on Ceramic Substrates for Nanofiltration

Bao

Chen

Wang

et al. 2019

Adv Materials Inter

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“…They do not contain cholesterols, proteins, channels, or a cytoskeleton. So, when a local strain is induced in the membrane of a liposome or exosome, the molecules of the membrane quickly reorganize themselves to reduce this strain, and the membrane rupture is avoided . While in case of an actual cell, a similar strain might cause membrane breakdown or formation of pores on the membrane.…”

Section: Governing Equations For Electrodeformation Phenomenamentioning

confidence: 99%

Mechanical characterization of vesicles and cells: A review

et al. 2020

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Vesicles perform many essential functions in all living organisms. They respond like a transducer to mechanical stress in converting the applied force into mechanical and biological responses. At the same time, both biochemical and biophysical signals influence the vesicular response in bearing mechanical loads. In recent years, liposomes, artificial lipid vesicles, have gained substantial attention from the pharmaceutical industry as a prospective drug carrier which can also serve as an artificial cell-mimetic system. The ability of these vesicles to enter through pores of even smaller size makes them ideal candidates for therapeutic agents to reach the infected sites effectively. Engineering of vesicles with desired mechanical properties that can encapsulate drugs and release as required is the prime challenge in this field. This requirement has led to the modifications of the composition of the bilayer membrane by adding cholesterol, sphingomyelin, etc. In this article, we review the manufacturing and characterization techniques of various artificial/synthetic vesicles. We particularly focus on the electric field-driven characterization techniques to determine different properties of vesicle and its membranes, such as bending rigidity, viscosity, capacitance, conductance, etc., which are indicators of their content and mobility. Similarities and differences between artificial vesicles, natural vesicles, and cells are highlighted throughout the manuscript since most of these artificial vesicles are intended for cell mimetic functions.

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“…Since all membranes were prepared from the same material, the difference in the surface morphology can thus be held responsible for the change in surface CA values, as can be seen in Table 2 and Figure 1. It is known that highly hydrophobic surface is a result of the presence of multi-scale surface features consisting of both micro-and nano-scale roughness [7,[15][16][17], also known as the lotus leaf effect. The high contact angle on the surface of a lotus leaf is a consequence of such micro-and nano-scale roughness, the micro-and nano-scale roughness can be clearly seen in our case for VIPS-60% and VIPS-80% SEM images, Figure 1.…”

Section: Membrane Morphologies In Nips Vs Vipsmentioning

confidence: 99%

Improving Liquid Entry Pressure of Polyvinylidene Fluoride (PVDF) Membranes by Exploiting the Role of Fabrication Parameters in Vapor-Induced Phase Separation VIPS and Non-Solvent-Induced Phase Separation (NIPS) Processes

AlMarzooqi¹,

Bilad²,

Arafat³

2017

Applied Sciences

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Polyvinylidene fluoride (PVDF) is a popular polymer material for making membranes for several applications, including membrane distillation (MD), via the phase inversion process. Non-solvent-induced phase separation (NIPS) and vapor-induced phase separation (VIPS) are applied to achieve a porous PVDF membrane with low mass-transfer resistance and high contact angle (hydrophobicity). In this work, firstly, the impacts of several preparation parameters on membrane properties using VIPS and NIPS were studied. Then, the performance of the selected membrane was assessed in a lab-scale direct-contact MD (DCMD) unit. The parametric study shows that decreasing PVDF concentration while increasing both relative humidity (RH) and exposure time increased the contact angle and bubble-point pore size (BP). Those trends were investigated further by varying the casting thickness. At higher casting thicknesses and longer exposure time (up to 7.5 min), contact angle (CA) increased but BP significantly decreased. The latter showed a dominant trend leading to liquid entry pressure (LEP) increase with thickness.

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Metal–Organic Framework-Functionalized Alumina Membranes for Vacuum Membrane Distillation

Cited by 54 publications

References 60 publications

A Novel Metal–Organic Framework (MOF)–Mediated Interfacial Polymerization for Direct Deposition of Polyamide Layer on Ceramic Substrates for Nanofiltration

A Novel Metal–Organic Framework (MOF)–Mediated Interfacial Polymerization for Direct Deposition of Polyamide Layer on Ceramic Substrates for Nanofiltration

Mechanical characterization of vesicles and cells: A review

Improving Liquid Entry Pressure of Polyvinylidene Fluoride (PVDF) Membranes by Exploiting the Role of Fabrication Parameters in Vapor-Induced Phase Separation VIPS and Non-Solvent-Induced Phase Separation (NIPS) Processes

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