Preparation and characterization of new low MWCO ceramic nanofiltration membranes for organic solvents

Zeidler, Stefanie; Puhlfürß, P.; Kätzel, Uwe; Voigt, Ingolf

doi:10.1016/j.memsci.2014.07.051

Cited by 62 publications

(30 citation statements)

References 18 publications

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“…Pela regressão linear e aplicação do modelo de filme, conforme a Equação 3, obtém-se o valor do coeficiente de transferência de massa (k). A retenção intrínseca (R) para as soluções de dextrana e poli(vinilpirrolidona) foram calculados a partir do coeficiente linear das retas (Baldasso et al 2011;Zeidler et al 2014). …”

Section: Materiais E Métodosunclassified

Caracterização Morfológica E Parâmetros Funcionais De Membrana Cerâmica Multitubular

2017

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Section: Materiais E Métodosunclassified

Caracterização Morfológica E Parâmetros Funcionais De Membrana Cerâmica Multitubular

2017

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“…For analysing the quality of ceramic UF or NF membranes, size exclusion and permporometry methods are most commonly used [26][27][28]. The disadvantage to permporometry is the requirement of specific equipment [28][29][30]. When using size exclusion methods, the molecular weight cut-off (MWCO) is determined using a multiple monodisperse molecules of different sizes, e.g.…”

Section: Introductionmentioning

confidence: 99%

Quantifying defects in ceramic tight ultra- and nanofiltration membranes and investigating their robustness

Kramer

Shang

Scherrenberg

et al. 2019

Separation and Purification Technology

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Quantifying defects in ceramic tight ultra-and nanofiltration membranes and investigating their robustness Kramer, F. C.; Shang, R.; Scherrenberg, S. M.; Rietveld, L. C.; Heijman, S. J.G. A B S T R A C TOne of the perceived benefits of ceramic membranes is their robustness, which makes them suitable for treating high organic load waste streams. In particular, ceramic tight ultrafiltration (tUF) and nanofiltration (NF) form an important barrier against small colloids and organic molecules. In order to achieve this barrier, the quality of the membranes should be uncompromised.An extension on a commonly used size exclusion method was developed in order to quantify defects in membranes and calculate the MWCO accurately excluding the defects. This approach gives a better representation of the membrane quality than the original method. The quality of a broad range of commercial ceramic membranes was investigated by determining the (i) hydraulic permeability, (ii) molecular weight cutoff, and (iii) quantitative defects. Several membranesboth tubular and disc membranes, selected from various supplierswere tested to investigate their variability. Furthermore, the robustness of tubular NF membranes was studied by monitoring the effect of long-term exposure to sodium hypochlorite, which is commonly used to mitigate organic fouling.The results showed that batches of both tubular and disc membranes of different pore size and suppliers included membranes with defects. Furthermore, the long-term treatment of tubular ceramic membranes with sodium hypochlorite negatively affected, beyond expectation, the quality of the membranes. The separation layer in these membranes was not notably compromised by sodium hypochlorite exposure, but the end seal layer was damaged.

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“…Inorganic membranes, on the other hand, offer relatively stable flux performances since they do not endure compaction or swelling. Moreover, their high chemical tolerance at harsh conditions make them, in general, more resilient to harsh organic solvents . Despite these attractions, inorganic membranes are relatively expensive and complex and they are difficult to integrate into modules.…”

Section: Introductionmentioning

confidence: 99%

Silane‐Crosslinked Asymmetric Polythiosemicarbazide Membranes for Organic Solvent Nanofiltration

Aburabie

Emwas

Peinemann

2018

Macro Materials & Eng

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Crosslinked polythiosemicarbazide (PTSC) membranes with a positively charged surface are fabricated via a reaction with (3‐glycidyloxypropyl)trimethoxysilane. The integrally asymmetric ultrafiltration membranes discussed here can be easily prepared by water‐induced phase separation using a PTSC solution in dimethylsulfoxide (DMSO). The crosslinked PTSC membranes are stable in DMSO, N,N‐dimethylformamide, and tetrahydrofuran and they reject molecules of molecular weights (MW) above 1300 g mol−1. The influence of the crosslinking agent on the surface charge, membrane solvent resistance, and membrane performance is discussed. The crosslinked asymmetric PTSC membranes totally reject Direct Red dye (MW 1373 g mol−1), while the pristine PTSC membrane does not show any rejection for this dye. This finding suggests that an inorganic‐type‐network is formed during the crosslinking reaction, which tunes the pore size of the prepared membranes.

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Preparation and characterization of new low MWCO ceramic nanofiltration membranes for organic solvents

Cited by 62 publications

References 18 publications

Caracterização Morfológica E Parâmetros Funcionais De Membrana Cerâmica Multitubular

Caracterização Morfológica E Parâmetros Funcionais De Membrana Cerâmica Multitubular

Quantifying defects in ceramic tight ultra- and nanofiltration membranes and investigating their robustness

Silane‐Crosslinked Asymmetric Polythiosemicarbazide Membranes for Organic Solvent Nanofiltration

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