Synthesis of highly porous poly(tert-butyl acrylate)-b-polysulfone-b-poly(tert-butyl acrylate) asymmetric membranes

Xie, Yihui; Moreno, Nicolas; Calo, Victor M.; Cheng, Hong; Hong, Pei‐Ying; Sougrat, Rachid; Behzad, Ali Reza; Tayouo, Russell; Nunes, Suzana Pereira

doi:10.1039/c6py00215c

Cited by 29 publications

(22 citation statements)

References 81 publications

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“…1 H and 13 C NMR of VFD synthesized PSF at the optimised VFD condition, respectively, matching the corresponding spectra for highly porous PSF membranes. 33 The smaller peaks for the aromatic region in Fig. S10, ‡ can be assigned to terminal groups of the polymer.…”

Section: Synthesis Of Psfmentioning

confidence: 98%

“…In targeting the formation of high molecular weight polymer in the VFD, this region should be minimal. 33 Varying VFD operational parameters Experiments T 1 to T 6 in Table S1 ‡ were carried out to establish the effect of varying u, from 3000 to 8000 rpm. Average molecular weight (M w ), T g , and decomposition temperature, as well as yield were determined for all experiments.…”

Section: Synthesis Of Psfmentioning

confidence: 99%

“…2a). DSC measurements to determine T g were carried out under a nitrogen/air atmosphere, with the highest T g reported thus far for PSF at $187 C. 33 T g values for T 1 , to T 6 were $126, 125, 135, 142, 141, and 138 C respectively, with the highest for PSF formed at 6000 rpm. The highest yield of isolated PSF, 53%, also corresponds to experiment T 4 , with yields lower for increasing and reducing u, at 37% and 39% for 3000 and 8000 rpm, respectively.…”

Section: Synthesis Of Psfmentioning

confidence: 99%

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Vortex fluidic mediated synthesis of polysulfone

et al. 2020

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Section: Synthesis Of Psfmentioning

confidence: 98%

Section: Synthesis Of Psfmentioning

confidence: 99%

Section: Synthesis Of Psfmentioning

confidence: 99%

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Vortex fluidic mediated synthesis of polysulfone

et al. 2020

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“…Membranes prepared by combining block copolymer self‐assembly and phase inversion have been now explored and optimized for a decade . In addition to high porosity and narrow pore size distribution, the membranes can have other interesting properties: various stimuli‐responsive behaviors, form complex with different metals for catalysis or antifouling activity The chemical functionality of the membranes can be tailored by incorporating functional groups useful for different separations. A number of diblock copolymers have been used for asymmetric membrane fabrication by phase inversion.…”

Section: Introductionmentioning

confidence: 99%

Functionalized Nanochannels from Self‐Assembled and Photomodified Poly(Styrene‐b‐Butadiene‐b‐Styrene)

Sutisna

Polymeropoulos

Musteata

et al. 2017

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Membranes are prepared by self-assembly and casting of 5 and 13 wt% poly(styrene-b-butadiene-b-styrene) (PS-b-PB-b-PS) copolymers solutions in different solvents, followed by immersion in water or ethanol. By controlling the solution-casting gap, porous films of 50 and 1 µm thickness are obtained. A gradient of increasing pore size is generated as the distance from the surface increased. An ordered porous surface layer with continuous nanochannels can be observed. Its formation is investigated, by using time-resolved grazing incident small angle X-ray scattering, electron microscopy, and rheology, suggesting a strong effect of the air-solution interface on the morphology formation. The thin PS-b-PB-b-PS ordered films are modified, by promoting the photolytic addition of thioglycolic acid to the polybutadiene groups, adding chemical functionality and specific transport characteristics on the preformed nanochannels, without sacrificing the membrane morphology. Photomodification increases fivefold the water permeance to around 2 L m h bar , compared to that of the unmodified one. A rejection of 74% is measured for methyl orange in water. The membranes fabrication with tailored nanochannels and chemical functionalities can be demonstrated using relatively lower cost block copolymers. Casting on porous polyacrylonitrile supports makes the membranes even more scalable and competitive in large scale.

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“…The oxides of zirconium, manganese, and aluminum; clays; organic polyelectrolytes; methyl methacrylate; acrylic acid; divinylbenzene; styrene; polytetrafluoroethylene; polydimethylsiloxane; polyvinylidene chloride; polycarbonate; and other chemicals were used for the formation of a dynamic layer of membranes in various studies [8][9][10][11][12][17][18][19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Microwave Stabilization of a Dynamic Membrane Layer

Фазуллин

Маврин

Шайхиев

et al. 2019

Membr. Membr. Technol.

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Dynamic membranes have been obtained by depositing a polystyrene (PS) layer onto a nylon substrate. The dynamic membrane layer of PS particles on the nylon substrate has been treated using 2450-MHz microwave radiation of a 350 W power in air. It has been found that as a result of the microwave irradiation of the membranes in atmospheric air, the membrane mass decreases to 0.69% of the initial value depending on the treatment time. Scanning electron microscopy examination has shown the formation of agglutinated polystyrene particles and melted and compacted regions on the membrane surface. According to the scanning electron microscopy data, the microwave treatment of the membrane has decreased the roughness of its surface layer by a factor of 8. According to IR data, the action of microwave radiation on the nylon-PS membrane leads to a decrease in the intensity of peaks in a range of absorption bands from 1500 to 3500 cm-1. An observed increase in the membrane flux by microwave irradiation for up to 10 min has been associated with the etching of membrane surfaces, whereas a decrease in the flux after irradiation for 20 min is explained by the compaction and melting of particles in the dynamic layer. The stability of the dynamic layer has been established by examining the flux of the membrane and changes in its mass after backwashing with a detergent solution. It has been found that the stability of the dynamic layer of the nylon-PS membrane is achieved with microwave irradiation for 5 min. An increase in the treatment time increases the degree of surface etching and leads to the formation of defective areas in the dynamic membrane layer. The microwave-irradiated dynamic nylon-PS membrane has been used to separate a water-oil emulsion. The degree of separation of the emulsion was 96.1% at a membrane flux of 19.1 dm 3 m-2 h-1 .

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Synthesis of highly porous poly(tert-butyl acrylate)-b-polysulfone-b-poly(tert-butyl acrylate) asymmetric membranes

Abstract: For the first time, self-assembly and non-solvent induced phase separation was applied to polysulfone-based linear block copolymers, reaching mechanical stability much higher than other block copolymer membranes used in this method, which were mainly based on polystyrene blocks.

Cited by 29 publications

References 81 publications

Vortex fluidic mediated synthesis of polysulfone

Vortex fluidic mediated synthesis of polysulfone

Functionalized Nanochannels from Self‐Assembled and Photomodified Poly(Styrene‐b‐Butadiene‐b‐Styrene)

Microwave Stabilization of a Dynamic Membrane Layer

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