Stabilization of gas transport properties of PTMSP with porous aromatic framework: Effect of annealing

Волков, А. В.; Bakhtin, D. S.; Куликов, Л. А.; Terenina, M. V.; Golubev, G. S.; Бондаренко, Г. Н.; Legkov, S. A.; Shandryuk, G. A.; Волков, В. В.; Khotimskiy, V. S.; Belogorlov, A. A.; Максимов, А. Л.; Караханов, Э. А.

doi:10.1016/j.memsci.2016.06.033

Cited by 52 publications

(56 citation statements)

References 37 publications

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“…[228][229][230] For example, it is known that the relative preference of the solvent for the NP surface vs. the preference of the polymer for the NP surface can play a critical role. Thus, silica-P2VP mixtures cast from tetrahydrofuran (THF) yield well-dispersed NPs, whereas processing from a pyridine solution results in agglomerated NPs.…”

Section: Kinetics Of Nanoparticle Dispersion and Assemblymentioning

confidence: 99%

Perspective: Outstanding theoretical questions in polymer-nanoparticle hybrids

Kumar

Ganesan

Riggleman

2017

The Journal of Chemical Physics

171

143

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This topical review discusses the theoretical progress made in the field of polymer nanocomposites, i.e., hybrid materials created by mixing (typically inorganic) nanoparticles (NPs) with organic polymers. It primarily focuses on the outstanding issues in this field and is structured around five separate topics: (i) the synthesis of functionalized nanoparticles; (ii) their phase behavior when mixed with a homopolymer matrix and their assembly into well-defined superstructures; (iii) the role of processing on the structures realized by these hybrid materials and the role of the mobilities of the different constituents; (iv) the role of external fields (electric, magnetic) in the active assembly of the NPs; and (v) the engineering properties that result and the factors that control them. While the most is known about topic (ii), we believe that significant progress needs to be made in the other four topics before the practical promise offered by these materials can be realized. This review delineates the most pressing issues on these topics and poses specific questions that we believe need to be addressed in the immediate future. Published by AIP Publishing. [http://dx

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Section: Kinetics Of Nanoparticle Dispersion and Assemblymentioning

confidence: 99%

Perspective: Outstanding theoretical questions in polymer-nanoparticle hybrids

Kumar

Ganesan

Riggleman

2017

The Journal of Chemical Physics

171

143

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“…Porous aromatic frameworks (PAFs), containing only carbon and hydrogen atoms within their frameworks, are a new class of porous materials, and offer unique chemical versatility combined with designable framework topologies, large surface areas, low density, strong hydrophobicity, and chemical stability. 19,20 Nevertheless, to our best knowledge, the incorporation of PAFs in pervaporation membranes has not been reported. PAF-11, synthesized via a Suzuki coupling reaction between tetrakis(4-bromophenyl)methane (TBPM) and diboronic acid at the catalysis of tetra(tri-phenyl phosphine) palladium (Scheme 1), possesses large Langmuir surface area, high uptake for methanol and aromatic molecules, micro-and meso-porous structure (0.5-1.2 nm), strong hydrophobicity and high thermal stability (up to 400 ∘ C in air).…”

Section: Introductionmentioning

confidence: 97%

“…High compatibility between fillers and PDMS matrix is crucial for fabrication of MMMs with excellent pervaporation performance. Porous aromatic frameworks (PAFs), containing only carbon and hydrogen atoms within their frameworks, are a new class of porous materials, and offer unique chemical versatility combined with designable framework topologies, large surface areas, low density, strong hydrophobicity, and chemical stability . Nevertheless, to our best knowledge, the incorporation of PAFs in pervaporation membranes has not been reported.…”

Section: Introductionmentioning

confidence: 99%

PAF‐11/poly (dimethylsiloxane) mixed matrix pervaporation membranes for dealcoholization of aqueous solutions

Jia

Hao

Jiang

2018

J of Chemical Tech & Biotech

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BACKGROUND Porous aromatic frameworks (PAFs) have received considerable attention due to their designable framework topologies and high stability. In this work PAF‐11 particles were synthesized and incorporated in poly(dimethylsiloxane) (PDMS) matrix for dealcoholation of aqueous solutions for the first time. The effects of PAF‐11 loading on the hydrophobilicity, sorption degree, partition coefficient and pervaporation (PV) performance of mixed matrix membranes (MMMs) were studied. RESULTS It was found that, with the increased PAF‐11 loading, the contact angle of MMMs with water increased whereas the sorption degree in water, ethanol and n‐butanol declined, demonstrating the improved swelling stability of MMMs. Pristine PDMS and MMMs displayed alcohol sorption‐selectivity, and the partition coefficients of ethanol and n‐butanol in MMMs increased with PAF‐11 loading. In the pervaporation of ethanol and n‐butanol aqueous solutions, the MMMs showed an increase in permeation fluxes and separation factor, as well as good stability in long‐term running, demonstrating anti‐trade‐off effects and good application prospects. CONCLUSIONS It was deduced that, in the pervaporation removal of organics from aqueous solutions, anti‐trade‐off effects could be fulfilled by introducing hydrophobic fillers with pore sizes larger than molecules of water and organics. © 2018 Society of Chemical Industry

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“…Low-temperature plasma treatment with non-polymer-forming gases has been used in recent years as a useful tool to modify the surface properties of different materials, including PSf porous membranes [9][10][11][12][13][14][15][16][17][18][19]. Plasma allows to improve adhesion or wettability, as it generates the active species, capable of activating the upper surface molecular layers without involving the polymer bulk.…”

Section: Introductionmentioning

confidence: 99%

“…The thin film composite membranes using poly[1-(trimethylsilyl)-1-propyne] (PTMSP) as a non-porous selective layer and air plasma etched PSf porous hollow fiber membranes as a support were prepared and selective layer integrity was confirmed by gas permeation testing. The membrane selectivity can be improved by coating PTMSP on porous supports, even if this polymer is not greatly selective and many attempts have been reported to increase this [10,11].…”

Section: Introductionmentioning

confidence: 99%

Development of Polysulfone Hollow Fiber Porous Supports for High Flux Composite Membranes: Air Plasma and Piranha Etching

Borisov

Ovcharova

Bakhtin

et al. 2017

Fibers

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For the development of high efficiency porous supports for composite membrane preparation, polysulfone (PSf) hollow fiber membranes (outer diameter 1.57 mm, inner diameter 1.12 mm) were modified by air plasma using the low temperature plasma treatment pilot plant which is easily scalable to industrial level and the Piranha etch (H 2 O 2 + H 2 SO 4 ). Chemical and plasma modification affected only surface layers and did not cause PSf chemical structure change. The modifications led to surface roughness decrease, which is of great importance for further thin film composite (TFC) membranes fabrication by dense selective layer coating, and also reduced water and ethylene glycol contact angle values for modified hollow fibers surface. Furthermore, the membranes surface energy increased two-fold. The Piranha mixture chemical modification did not change the membranes average pore size and gas permeance values, while air plasma treatment increased pore size 1.5-fold and also 2 order enhanced membranes surface porosity. Since membranes surface porosity increased due to air plasma treatment the modified membranes were used as efficient supports for preparation of high permeance TFC membranes by using poly[1-(trimethylsilyl)-1-propyne] as an example for selective layer fabrication.

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Stabilization of gas transport properties of PTMSP with porous aromatic framework: Effect of annealing

Cited by 52 publications

References 37 publications

Perspective: Outstanding theoretical questions in polymer-nanoparticle hybrids

Perspective: Outstanding theoretical questions in polymer-nanoparticle hybrids

PAF‐11/poly (dimethylsiloxane) mixed matrix pervaporation membranes for dealcoholization of aqueous solutions

Development of Polysulfone Hollow Fiber Porous Supports for High Flux Composite Membranes: Air Plasma and Piranha Etching

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