A one-pot method for the preparation of mixed matrix polyvinylidene fluoride membranes with in situ synthesized and PEGylated polyethyleneimine particles

Kotte, Madhusudhana Rao; Hwang, Taewoon; Han, Jong‐In; Diallo, Mamadou S.

doi:10.1016/j.memsci.2014.09.044

Cited by 19 publications

(14 citation statements)

References 36 publications

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“…(a). The great decline in flux values of all membranes during the first cycle of filtration was mainly attributable to BSA adsorption in the membrane pores and formation of BSA cake layers on the surface of the membranes . About 30 min later, the value of flux became relatively steady due to equilibrium between the deposition and diffusion of protein .…”

Section: Resultsmentioning

confidence: 95%

“…Over the past decade, nanotechnology has rapidly developed from an academic pursuit to commercial reality; nanotechnology has already led to new membrane technologies . The convergence between membrane technology and nanotechnology is providing unprecedented opportunities to develop new membrane with embedded nanoparticles that enable superior performance and new functionality . A variety of nanomaterials have been used in the surface modification of PVDF membranes, and provide effective control strategies to overcome current limitations associated with PVDF membrane biofouling and organic fouling.…”

Section: Introductionmentioning

confidence: 99%

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A novel antifouling and antibacterial surface-functionalized PVDF ultrafiltration membrane via binding Ag/SiO₂nanocomposites

Yang

Shi

et al. 2016

J. Chem. Technol. Biotechnol

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BACKGROUND Membrane fouling is a main obstacle hindering wider application of membrane technologies, and can cause a decline in flux and increased energy consumption, and more frequent chemical or membrane replacement can increase the operating costs. Membrane fouling is mainly governed by organic fouling and biofouling. In recent years, the development of new materials has provided new methods and thoughts for the research and development of antifouling and antibacterial membranes. RESULTS In this study, to obtain both a highly hydrophilic, antifouling and antibacterial poly(vinylidene fluoride) (PVDF) membrane, in situ formed silver (Ag) nanoparticles were immobilized with silica (SiO2) nanoparticles, and then chemically bound onto a PVDF ultrafiltration (UF) membrane surface. The surface modification processes were achieved through a remarkably facile and effective dip‐coating method. The impacts of Ag/SiO2 nanocomposites on membrane performance were investigated when applied in membrane filtration processes simultaneously. This membrane showed higher hydrophilicity and water permeation flux. The PVDF membrane exhibited antibacterial properties and displayed better anti‐fouling performance. CONCLUSION The superior performance of the Ag/SiO2‐PVDF membranes and this facile, effective and scalable modification method hold great promise for their practical application. This work would also be helpful for developing new antifouling and antibacterial membrane and related materials via a convenient and large‐scale method. © 2016 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

A novel antifouling and antibacterial surface-functionalized PVDF ultrafiltration membrane via binding Ag/SiO₂nanocomposites

Yang

Shi

et al. 2016

J. Chem. Technol. Biotechnol

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“…DENs exhibit many features that make them particularly attractive as building blocks for the preparation of catalytic membranes and membrane–electrode assemblies for sustainability-related applications including green chemistry , and energy generation and storage. ,, To advance the integration of DENs into catalytic membrane modules for SusChEM-related applications, we first prepared a chelating PVDF membrane with in situ synthesized PAMAM SDPs (Figure ). This mixed matrix PVDF–PAMAM membrane was prepared using the integrated in situ particle synthesis and phase inversion casting process (Figure A) developed by Diallo and co-workers. − PVDF, G1-NH 2 PAMAM, and ECH were selected as (i) matrix precursor, (ii) dendrimer particle precursor, and (iii) cross-linker, respectively, for the preparation of our chelating membrane substrate (Figure A). This selection was motivated by several considerations.…”

Section: Resultsmentioning

confidence: 99%

A Facile and Scalable Route to the Preparation of Catalytic Membranes with in Situ Synthesized Supramolecular Dendrimer Particle Hosts for Pt(0) Nanoparticles Using a Low-Generation PAMAM Dendrimer (G1-NH₂) as Precursor

Kotte

Kuvarega

Talapaneni

et al. 2018

ACS Appl. Mater. Interfaces

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Since the first reports of Cu dendrimer-encapsulated nanoparticles (DENs) published in 1998, the dendrimer-templating method has become the best and most versatile method for preparing ultrafine metallic and bimetallic nanoparticles (1-3 nm) with well-defined compositions, high catalytic activity, and tunable selectivity. However, DENs have remained for the most part model systems with limited prospects for scale up and integration into high-performance and reusable catalytic modules and systems for industrial-scale applications. Here, we describe a facile and scalable route to the preparation of catalytic polyvinylidene fluoride (PVDF) membranes with in situ synthesized supramolecular dendrimer particles (SDPs) that can serve as hosts and containers for Pt(0) nanoparticles (2-3 nm). These new catalytic membranes were prepared using a reactive encapsulation process similar to that utilized to prepare Pt DENs by addition of a reducing agent (sodium borohydride) to aqueous complexes of Pt(II) + G4-OH/G6-OH polyamidoamine (PAMAM) dendrimers. However, the SDPs (2.4 μm average diameter) of our new mixed matrix PVDF-PAMAM membranes were synthesized in the dope dispersion without purification prior to film casting using (i) a low-generation PAMAM dendrimer (G1-NH) as particle precursor and (ii) epichlorohydrin, an inexpensive functional reagent, as cross-linker. In addition, the membrane PAMAM particles contain secondary amine groups (∼1.9 mequiv per gram of dry membrane), which are more basic and thus have higher Pt binding affinity than the tertiary amine groups of the G4-OH and G6-OH PAMAM dendrimers. Proof-of-concept experiments show that our new PVDF-PAMAM-G1-Pt/membranes can serve as highly active and reusable catalysts for the hydrogenation of alkenes and alkynes to the corresponding alkanes using (i) H at room temperature and a pressure of 1 bar and (ii) low catalyst loadings of ∼1.4-1.6 mg of Pt. Using cyclohexene as model substrate, we observed near quantitative conversion to cyclohexane (∼98%). The regeneration studies showed that our new Pt/membrane catalysts are stable and can be reused for five consecutive reaction cycles for a total duration of 120 h including 60 h of heating at 100 °C under vacuum for substrate, product, and solvent removal with no detectable loss of cyclohexene hydrogenation activity. The overall results of our study point to a promising, versatile, and scalable path for the integration of catalytic membranes with in situ synthesized SDP hosts for Pt(0) nanoparticles into high-throughput modules and systems for heterogeneous catalytic hydrogenations, an important class of reactions that are widely utilized in industry to produce pharmaceuticals, agrochemicals, and specialty chemicals.

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“…The development of nanotechnology creates a bright future for improving the performance of membrane . The combination of membrane with nanotechnology provides an unprecedented opportunity to develop a new separation membrane with embedded nanoparticles, which enable superior performance and new functionality . A variety of nanomaterials, including MOFs and inorganic particles, has been widely used in the membrane modification to improve the properties of polymer membrane.…”

Section: Introductionmentioning

confidence: 95%

Regulation of the microstructure of polyvinylidene fluoride membrane via incorporation of nano‐ZIF‐7 for improving hydrophobicity and antiwetting performance

Wang

Shi

et al. 2019

J Chinese Chemical Soc

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The design and fabrication of a membrane with super hydrophobicity and antiwetting property is of great importance for improving membrane performance in distillation, desalination, gas absorption, and separation. In this work, polyvinylidene fluoride (PVDF) membranes were modified by Zeolitic Imidazolate Framework-7 (ZIF-7) nanocrystals to improve the hydrophobic property and antiwetting performance. ZIF-7/PVDF hybrid membranes were prepared via the nonsolvent-induced phase separation (NIPS) method. Different concentrations of ZIF-7 nanocrystals (0, 0.5, 1, 2, 3, and 5 wt%) were introduced into the PVDF dope solution, and the physical structure of the resulting membranes were systematically characterized. Due to the hydrophobic nature of ZIF-7 nanocrystals, the solventnonsolvent exchange rate had been regulated effectively during phase inversion.The morphology of top and bottom surfaces, together with the inner structures of the hybrid membrane, has been changed obviously, showing a more twisted fingerlike macrovoid layer and a thicker sponge-like layer compared to pristine PVDF membrane. Furthermore, the hydrophobicity and antiwetting properties of these hybrid membranes improved obviously when the incorporated concentration of ZIF-7 was higher than 1 wt%. The M(2) membrane, which possessed the highest surface roughness and water contact angles, showed the best antiwetting property and recovered gas permeance ratio (>95%) after being immersed in aqueous solution for 10 hr. K E Y W O R D Santiwetting, hydrophobic, membrane, metal-organic framework, morphology, nanomaterials

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A one-pot method for the preparation of mixed matrix polyvinylidene fluoride membranes with in situ synthesized and PEGylated polyethyleneimine particles

Cited by 19 publications

References 36 publications

A novel antifouling and antibacterial surface-functionalized PVDF ultrafiltration membrane via binding Ag/SiO₂nanocomposites

A novel antifouling and antibacterial surface-functionalized PVDF ultrafiltration membrane via binding Ag/SiO₂nanocomposites

A Facile and Scalable Route to the Preparation of Catalytic Membranes with in Situ Synthesized Supramolecular Dendrimer Particle Hosts for Pt(0) Nanoparticles Using a Low-Generation PAMAM Dendrimer (G1-NH₂) as Precursor

Regulation of the microstructure of polyvinylidene fluoride membrane via incorporation of nano‐ZIF‐7 for improving hydrophobicity and antiwetting performance

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A one-pot method for the preparation of mixed matrix polyvinylidene fluoride membranes with in situ synthesized and PEGylated polyethyleneimine particles

Cited by 19 publications

References 36 publications

A novel antifouling and antibacterial surface-functionalized PVDF ultrafiltration membrane via binding Ag/SiO2nanocomposites

A novel antifouling and antibacterial surface-functionalized PVDF ultrafiltration membrane via binding Ag/SiO2nanocomposites

A Facile and Scalable Route to the Preparation of Catalytic Membranes with in Situ Synthesized Supramolecular Dendrimer Particle Hosts for Pt(0) Nanoparticles Using a Low-Generation PAMAM Dendrimer (G1-NH2) as Precursor

Regulation of the microstructure of polyvinylidene fluoride membrane via incorporation of nano‐ZIF‐7 for improving hydrophobicity and antiwetting performance

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Product

Resources

About

A novel antifouling and antibacterial surface-functionalized PVDF ultrafiltration membrane via binding Ag/SiO₂nanocomposites

A novel antifouling and antibacterial surface-functionalized PVDF ultrafiltration membrane via binding Ag/SiO₂nanocomposites

A Facile and Scalable Route to the Preparation of Catalytic Membranes with in Situ Synthesized Supramolecular Dendrimer Particle Hosts for Pt(0) Nanoparticles Using a Low-Generation PAMAM Dendrimer (G1-NH₂) as Precursor