Organic solvent-free polyelectrolyte complex membrane preparation: Effect of monomer mixing ratio and casting solution temperature

Mizan, Md Mizanul Haque; Rastgar, Masoud; Aktij, Sadegh Aghapour; Asad, Asad; Karami, Pooria; Rahimpour, Ahmad; Sadrzadeh, Mohtada

doi:10.1016/j.memsci.2022.121197

Cited by 11 publications

(6 citation statements)

References 65 publications

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“…The same phenomenon has been proved by M. M. H. Mizan et al 2023 (ref. 41) from the zeta potential value. The membrane positive surface charge increased from 8.4 mV to 16.4 mV at pH 6.5 with the increase of PEI amount, 21,42 as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of a polyethersulfone/polyethyleneimine porous membrane for sustainable separation of proteins in water media

Talukder,

Alam,

Talukder

et al. 2023

Environ. Sci.: Water Res. Technol.

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Section: Resultsmentioning

confidence: 99%

Fabrication of a polyethersulfone/polyethyleneimine porous membrane for sustainable separation of proteins in water media

Talukder,

Alam,

Talukder

et al. 2023

Environ. Sci.: Water Res. Technol.

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“…Previous results showed that homogenous solutions could be obtained with monomer mixing ratios of PEI to PSS from 1.6 : 1 to 2 : 1. 28,36 In this work, homogenous casting solutions were prepared using a monomer ratio of 1.7 : 1. The aim of this work is to prepare membranes with biocatalytic abilities.…”

Section: Structure and Permeability Of The Biocatalytic Membranesmentioning

confidence: 99%

Biocatalytic PEI–PSS membranes through aqueous phase separation: influence of casting solution pH and operational temperature

Li,

Baig,

de Vos

et al. 2024

Soft Matter

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“…Cosolvents can shorten or prolong the drying time, depending on their volatility, which can influence the kinetics of the complexation process. Moreover, cosolvents will also change the dielectric constant of the solvent, which influences the dissociation of the polyelectrolytes and their conformations. − We thus hypothesize that cosolvents may have a significant influence on the film formation process.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, cosolvents will also change the dielectric constant of the solvent, which influences the dissociation of the polyelectrolytes and their conformations. 23 − 25 We thus hypothesize that cosolvents may have a significant influence on the film formation process.…”

Section: Introductionmentioning

confidence: 99%

Evaporation-Induced Polyelectrolyte Complexation: The Role of Base Volatility and Cosolvents

Li,

de Heer Kloots,

van Ewijk

et al. 2024

Langmuir

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Film formation is a vital step for coating applications where a homogeneous, defect-free solid phase should be obtained, starting from a liquid casting formulation. Recently, an alternative waterborne-coating approach was proposed, based on the formation of a polyelectrolyte complex film. In this approach, an evaporating base induces a pH change during drying that initiates the complexation of oppositely charged polyelectrolytes, followed by further densification. In previous studies, ammonia was used as the evaporative base, leading to relatively fast evaporation and resulting in films showing significant brittleness, which tended to crack at low relative humidity or larger thicknesses. We hypothesize that slower complexation and/or evaporation can reduce the problematic stress build-up in the prepared polyelectrolyte complex coatings. For this reason, we studied the changes in the film formation process when there are different bases and cosolvents. We found that reducing the evaporation rate by changing ammonia to the slower evaporating dimethylamine or by adding DMSO as a cosolvent, led to less internal stress build-up during film formation, which could be beneficial for film application. Indeed, films prepared with ammonia showed cracking after 1 h, while films prepared with dimethylamine only showed cracking after one month. The fast evaporation of ammonia was also found to cause a temporary turbid phase, indicating phase separation, while for the slower evaporating bases, this did not occur. All prepared films remained sensitive to humidity, which poses the next challenge for these promising coatings.

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Organic solvent-free polyelectrolyte complex membrane preparation: Effect of monomer mixing ratio and casting solution temperature

Cited by 11 publications

References 65 publications

Fabrication of a polyethersulfone/polyethyleneimine porous membrane for sustainable separation of proteins in water media

Fabrication of a polyethersulfone/polyethyleneimine porous membrane for sustainable separation of proteins in water media

Biocatalytic PEI–PSS membranes through aqueous phase separation: influence of casting solution pH and operational temperature

Evaporation-Induced Polyelectrolyte Complexation: The Role of Base Volatility and Cosolvents

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