Performance of microwave synthesized dual solvent dope solution and lithium bromide additives on poly(ethersulfone) membranes

Ahmed, Iqbal; Ani, I.J.; Rajput, Rizwan

doi:10.1002/jctb.2676

Cited by 10 publications

(4 citation statements)

References 32 publications

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“…NMP) is stronger than its interaction with PES polymer chains. The same phenomena was also observed by Iqbal et al 31 The reduction in solvent power contributes to the insolubility of PES. Therefore, the ceramic loading for suspension with Li content (D-140, D-500 and D-700) must be maintained at 50% to ensure high homogeneity and the inversion capability of the suspension remains consistent.…”

Section: Effect Of Sintering Additive On Electrolyte Suspensionsupporting

confidence: 83%

Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique

et al. 2015

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The incorporation of lithium oxide (Li 2 O) as a sintering additive has specific advantages for electrolyte membrane fabrication. However, the viability of the sintering additive to be implemented in a phase inversion technique is still ambiguous. In this first attempt, lithium was doped into a gadolinium-doped ceria (CGO) crystal structure using the metal nitrate doping method and calcined at four different temperatures, i.e. 140, 300, 500 and 700 C. The prepared Li-doped CGO (Li-CGO) powders were analyzed by thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), N 2 adsorption/desorption, and Fourier-transform infrared (FTIR). Primary results demonstrate that the calcination temperature of the Li-CGO influences the condition of the electrolyte suspension. Li-CGO calcined at 700 C (D-700), as compared with other Li-CGO, possessed a strong interaction between the Li and CGO. The D-700 was then incorporated into the electrolyte flat sheet membrane which was prepared by a phase inversion technique. The membrane was then sintered at different sintering temperatures from 1350 C to 1450 C. In comparison with the unmodified CGO, the morphological results suggest that the Li 2 O can remarkably promote the densification of CGO at a lower sintering temperature (1400 C). These findings help to promote the use of sintering additives in a ceriabased electrolyte suspension specifically for the phase inversion technique.

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Section: Effect Of Sintering Additive On Electrolyte Suspensionsupporting

confidence: 83%

Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique

et al. 2015

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“…In MS-1 membrane, macrovoids were observed in the cross section. The underlying structure of the membrane can be attributed to high demixing rate of DMF [38,49]. In MS-2 formulated membrane, the active layer structure was found to be large.…”

Section: Resultsmentioning

confidence: 97%

Polymer Concentration and Solvent Variation Correlation with the Morphology and Water Filtration Analysis of Polyether Sulfone Microfiltration Membrane

Alvi¹,

Khalid²,

Ahmad

et al. 2019

Advances in Polymer Technology

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Microfiltration flat sheet membranes of polyether sulfone (PES) were fabricated by incorporating varying concentrations of polymer and investigated the influence of substituting solvents. The membranes were prepared via immersion precipitation method. Different solvents that included NMP (N-methyl-2-pyrrolidone), DMF (dimethylformamide), and THF (tetrahydrofuran) were used to analyse their effect on the performance and morphology of the prepared membranes. Two different coagulation bath temperatures were used to investigate the kinetics of membrane formation and subsequent effect on membrane performance. The maximum water flux of 141 ml/cm2.h was observed using 21% of PES concentration in NMP + THF cosolvent system. The highest tensile strength of 29.15 MPa was observed using membrane prepared with 21% PES concentration in NMP as solvent and coagulation bath temperature of 25°C. The highest hydraulic membrane resistance was reported for membrane prepared with 21% PES concentration in NMP as solvent. Moreover, the lowest contact angle of 67° was observed for membrane prepared with 15% of PES concentration in NMP as solvent with coagulation bath temperature of 28°C. Furthermore, the Hansen solubility parameter was used to study the effect on the thermodynamics of membrane formation and found to be in good correlation with experimental observation and approach in the present work.

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“…The homogeneity of the dope solution is important for the fabrication of membranes [ 37 , 38 , 39 ]. Two methods were used to achieve full mixing of the dope solution, sonication and planetary mixing.…”

Section: Methodsmentioning

confidence: 99%

Investigation of the Use of a Bio-Derived Solvent for Non-Solvent-Induced Phase Separation (NIPS) Fabrication of Polysulfone Membranes

2018

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Organic solvents, such as N-methyl-2-pyrrolidone (NMP) and dimethylacetamide (DMAc), have been traditionally used to fabricate polymeric membranes. These solvents may have a negative impact on the environment and human health; therefore, using renewable solvents derived from biomass is of great interest to make membrane fabrication sustainable. Methyl-5-(dimethylamino)-2-methyl-5-oxopentanoate (Rhodiasolv PolarClean) is a bio-derived, biodegradable, nonflammable and nonvolatile solvent. Polysulfone is a commonly used polymer to fabricate membranes due to its thermal stability, strong mechanical strength and good chemical resistance. From cloud point curves, PolarClean showed potential to be a solvent for polysulfone. Membranes prepared with PolarClean were investigated in terms of their morphology, porosity, water permeability and protein rejection, and were compared to membranes prepared with traditional solvents. The pores of polysulfone/PolarClean membranes were sponge-like, and the membranes displayed higher water flux values (176.0 ± 8.8 LMH) along with slightly higher solute rejection (99.0 ± 0.51%). On the other hand, PSf/DMAc membrane pores were finger-like with lower water flux (63.1 ± 12.4 LMH) and slightly lower solute rejection (96 ± 2.00%) when compared to PSf/PolarClean membranes.

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Performance of microwave synthesized dual solvent dope solution and lithium bromide additives on poly(ethersulfone) membranes

Cited by 10 publications

References 32 publications

Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique

Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique

Polymer Concentration and Solvent Variation Correlation with the Morphology and Water Filtration Analysis of Polyether Sulfone Microfiltration Membrane

Investigation of the Use of a Bio-Derived Solvent for Non-Solvent-Induced Phase Separation (NIPS) Fabrication of Polysulfone Membranes

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