Advances in membrane materials: desalination membranes based on directly copolymerized disulfonated poly(arylene ether sulfone) random copolymers

Xie, Wei; Park, Ho Bum; Cook, Joseph; Lee, Young Moo; Byun, Gwang-Su; Freeman, Benny D.; McGrath, James E.

doi:10.2166/wst.2010.883

Cited by 38 publications

(18 citation statements)

References 15 publications

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“…Preparation protocols for and characterization of XLPEGDA [69], BPSH [41,44,[70][71][72], and sPBC [39,43,45,64,65,73] have been reported previously. XLPEGDA was prepared by cross-linking poly(ethylene glycol diacrylate) (average M n ¼700 g mol À 1 , catalog number 455008, Sigma-Aldrich, St. Louis, MO) [69].…”

Section: Methodsmentioning

confidence: 99%

Sodium chloride sorption in sulfonated polymers for membrane applications

Geise

Falcon

Freeman

et al. 2012

Journal of Membrane Science

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142

133

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Section: Methodsmentioning

confidence: 99%

Sodium chloride sorption in sulfonated polymers for membrane applications

Geise

Falcon

Freeman

et al. 2012

Journal of Membrane Science

Self Cite

142

133

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“…2A [59], a sulfonated polysulfone random copolymer (BPSH), whose structure is shown in Fig. 2B [39,[60][61][62][63], and a sulfonated styrenic pentablock copolymer (sPBC), whose structure is shown in Fig. 2C [10,11,13,44,[64][65][66].…”

Section: Polymersmentioning

confidence: 99%

Sodium chloride diffusion in sulfonated polymers for membrane applications

Geise

Freeman²,

Paul³

2013

Journal of Membrane Science

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107

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a b s t r a c tSodium chloride permeability and sorption measurements were used to calculate average salt diffusion coefficients for charged, sulfonated polymers of interest for membrane applications. A sulfonated polysulfone random copolymer and two phase-separated, sulfonated styrenic pentablock copolymers were considered, and data for these materials were compared with those for an uncharged cross-linked poly(ethylene glycol diacrylate) hydrogel. The average salt diffusion coefficients reported for the block copolymers are apparent salt diffusion coefficients because the values have not been adjusted for the polymer's phase separated morphology. The sodium chloride permeability of the uncharged hydrogel decreases by about 16% as upstream salt concentration increases from 0.01 to 1 mol L À 1 . This salt permeability change results from a decrease in the salt diffusion coefficient with increasing salt concentration because the polymer's water content decreases as salt concentration increases (i.e., osmotic de-swelling). This decrease in salt diffusion coefficient is consistent with free volume theory, wherein a decrease in water content leads to a decrease in free volume, thereby decreasing the salt diffusion coefficient and, in turn, salt permeability. In contrast, the sodium chloride permeability of the charged polymers increases by more than an order of magnitude as upstream salt concentration increases from 0.01 to 1 mol L À 1 . This salt permeability increase is due to increases in both mobile salt sorption and diffusion coefficients with increasing salt concentration, despite the fact that water content (and, therefore, free volume) in the polymer decreases as salt concentration increases. Thus, the increase in salt diffusion coefficient with increasing salt concentration in the charged polymers results from factors (which are currently poorly understood) other than simply water uptake or free volume.

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“…Dependencies of this kind are also found for membranes based on vulcanized rubber. These dependencies are described using the equation proposed in [5], based on theoretical developments [6][7]. The barrier properties of polysulfone-based membranes were studied in [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Connection of water permeability with a number of physical properties of polymers

et al. 2021

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Currently, methods for predicting the properties of polymers are very popular, since they simplify the work of synthetic chemists. Instead of lengthy and time-consuming experiments, many properties of polymers can be predicted in advance based on their chemical structure. Naturally, such tasks must be computerized so that the properties are predicted after the chemical structure of the repeating polymer unit is displayed on the display screen. This is the so-called direct task. The inverse problem is more complex and interesting. It consists in entering the intervals of the desired characteristics into the computer. Then computer synthesis of polymers possessing these characteristics are realized. The work consists in writing a computer program that allows the computer synthesis of polymers of different classes with specified intervals of water permeability. These classes include polyurethanes, polysulfones, polysulfides, polyethers and polyesters, polyamides, polyketones and polyethyrketones, polycarbonates, polyolefins, vinyl polymers, polystyrene, acrylic and methacrylic polymers. On the basis of this program, water permeability compatibility diagrams are constructed with various physical characteristics of polymers – glass transition temperature, temperature of the onset of intensive thermal degradation, cohesion energy, density, solubility parameter (Hildebrand parameter).

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Advances in membrane materials: desalination membranes based on directly copolymerized disulfonated poly(arylene ether sulfone) random copolymers

Cited by 38 publications

References 15 publications

Sodium chloride sorption in sulfonated polymers for membrane applications

Sodium chloride sorption in sulfonated polymers for membrane applications

Sodium chloride diffusion in sulfonated polymers for membrane applications

Connection of water permeability with a number of physical properties of polymers

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