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Sulfonated polysulfone membranes

Several composite membranes have been prepared based on sulfonated polymers. These are typically formed on microporous polysulfone supports by solu- [Pg.333]

The most outstanding property of the NS-200 membrane was its extremely high salt rejection. In simulated seawater tests, salt rejection levels of 99.8 to 99.9% were rountinely observed. Typical performance in a 1,500 psi test on 3.5% synthetic seawater at 25°C was 20 gfd and 99.9% salt rejection. In a few instances, laboratory samples of NS-200 membranes with fluxes of 40 to 50 gfd under these same test conditions were obtained. [Pg.334]

In subsequent efforts on the commercialization of this membrane, in flat sheet form, water fluxes of up to 23 gfd (99.6% salt rejection) at 800 psi on simulated seawater72 and 50 gfd (98% salt rejection) on 0.5% sodium chloride at 250 psi73 were achieved. [Pg.334]

Membrane instability was believed to result from hydrolytic cleavage of sulfate and sulfonate esters in the sulfonated polyfurane resin. This hydrolysis would entail some depolymerization of the resin and concurrent formation of ionic sulfonate groups, causing the membrane to absorb water and swell in monovalent salt solutions. Oxidation by dissolved oxygen is another potential [Pg.334]

The PEC-1000 membrane, developed by Toray Industries, has many similarities to the NS-200 membrane. This membrane has been described by Kurihara and coworkers as a thin film composite membrane in which the barrier layer was formed by an acid-catalyzed condensation reaction on the surface of micro-porous polysulfone.7S The cross section of this membrane, under high magnification in a scanning electron microscope is quite similar in structure to the NS-200 membrane. The barrier layer is 300 angstroms thick. [Pg.335]


Transport of Ions and Water in Sulfonated Polysulfone Membranes... [Pg.351]

A sulfonated polysulfone membrane with commercial potential has been developed in the form of a hollow fiber by workers at Albany International Corporation.86 87 In a 5,000-hour test on 3,500 ppm brackish water at 400 psi, this membrane exhibited 98% salt rejection at 1 gfd. Flux and salt rejection remained constant even with addition of 100 ppm chlorine. In a 12,000-hour test on seawater at the Wrightsville Beach Test Facility, this membrane exhibited 98+% salt rejection and an average flux of 1.5 gfd at 1,000 psi operating pressure. Thus, it is possible to make a high rejection membrane from sulfonated polysulfone. Flux was rather low in this particular case, but suitable for hollow fiber membrane use. [Pg.339]

Table 6.9 Methanol membrane selectivity and maximum power density under different DMFC operation conditions of sulfonated polysulfone membranes... [Pg.190]

Lufrano F, Baglio V, Staiti P, Arico AS, Antonucci V (2006) Development and characterization of sulfonated polysulfone membranes for direct methanol fuel cells. Desalination 199 283-285... [Pg.229]

Arnold C, Assink RA (1988) Development of sulfonated polysulfone membranes for redox flow batteries. J Membr Sci 38 71-83. doi 10.1016/S0376-7388(00)83276-7... [Pg.44]

Fig. 2.7 (a) Synthesis of sulfonated polysulfone membranes, (b) Preparation of sulfonated polysulfime membranes. Reproduced from [16] with permission from Elsevier... [Pg.15]

The surface morphology of the sulfonated polysulfone membranes was investigated by scanning electron microscopy (SEM), as shown in Fig. 2.9. The composite membrane shows a relatively uniform distribution of silica particles in the polymer matrix (see Fig. 2.9c and d). However, agglomeration of silica particles with dimensions in the range of 20-50 nm is also observed. [Pg.16]

Fig. 2.9 Surface morphology of bare (a, b) and composite with silica fiUer nanoparticles (c, d) sulfonated polysulfone membrane... Fig. 2.9 Surface morphology of bare (a, b) and composite with silica fiUer nanoparticles (c, d) sulfonated polysulfone membrane...
These sulfonated polysulfone membranes 100 °C for the cell equipped with sulfonated have been investigated in DMFCs operating at polysulfone membrane. The fuel cell perfor-high temperatures (100-120 °C). Figure 2.11 mance at 100 °C compared to 90 °C shows a shows the DMFC performances at 90 and lower open circuit voltage (OCV) (0.77... [Pg.19]

Lufrano, F Baglio, V., Di Blasi, O., Staiti, P Antonucci, V., and Aric6, A.S. (2012) Solid polymer electrolyte based on sulfonated polysulfone membranes and acidic silica for direct methanol fuel cells. Solid State Ionics, 216, 90-94. [Pg.146]

Siracusano, S., Bagbo, V., Lufrano, F., Staiti, R, Aric6, A.S., Electrochemical characterization of a PEM water electrolyzer based on a sulfonated polysulfone membrane, J. Membr. ScL, 2013, 448, 209-214. [Pg.446]


See other pages where Sulfonated polysulfone membranes is mentioned: [Pg.355]    [Pg.357]    [Pg.359]    [Pg.361]    [Pg.196]    [Pg.278]    [Pg.186]    [Pg.338]    [Pg.339]    [Pg.188]    [Pg.319]    [Pg.19]    [Pg.86]    [Pg.141]    [Pg.347]    [Pg.349]    [Pg.351]    [Pg.353]    [Pg.355]    [Pg.357]    [Pg.359]    [Pg.361]    [Pg.363]    [Pg.365]   
See also in sourсe #XX -- [ Pg.338 ]

See also in sourсe #XX -- [ Pg.347 , Pg.348 , Pg.349 , Pg.350 , Pg.351 , Pg.352 , Pg.353 , Pg.354 , Pg.355 , Pg.356 , Pg.357 , Pg.358 , Pg.359 , Pg.360 , Pg.361 , Pg.362 , Pg.363 , Pg.364 ]




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Membranes sulfonated

Polysulfones

Polysulfones, sulfonated

Polysulfones, sulfonation

Sulfonate membranes

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