Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

Nadour, Meriem; Boukraa, Fatima; Ouradi, Adel; Benaboura, Ahmed

doi:10.1590/1980-5373-mr-2016-0544

Cited by 55 publications

(17 citation statements)

References 47 publications

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“…Pristine polysulfone DSC analysis does not reveal any thermal process at the experimented temperatures, while its thermogravimetric analysis shows thermal stability up to temperatures close to 550°C ( Figure S7). [40] Differential scanning calorimetry results for 1/PSU ( Figure S8) revealed an endothermic process at 75°C that can be attributed to transition between phase I to phase II of the confined solid. Reversely, an exothermic peak was found at temperatures close to 65°C that could correspond to return to phase I of complex 1.…”

Section: Studies Of 1 Confined In Psu (1/psu)mentioning

confidence: 99%

A Europium(III) Complex Embedded in a Polysulfone Host Matrix: A Flexible Film with Temperature‐Responsive Ratiometric Behaviour

et al. 2020

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An emissive europium(III) complex [C 2 mim][Eu(fod) 4 ] (1; C 2 mim = 1-ethyl-3-methyl-imidazolium; fod = 1,1,1,2,2,3,3-heptafluoro-7,7-dimethyloctane-4,6-dionate) was prepared. The complex shows ratiometric thermal behaviour up to 155°C. These unusual temperature-dependent properties arise from a solidsolid phase transition that promotes increased contact between the anion and the cation, affecting the emission profile of the emissive anion in two different ratiometric relations. A ultra-bright and flexible emissive photopolymer film was obtained using polysulfone (PSU) as the host matrix of 10 % (w/w) of 1, that also induced changes on the lanthanide emissive profile with temperature. A temperature-responsive luminescent film 1/PSU is sensitivr to heating between 100 and 155°C. Also, the emission lifetime of 1 was not affected by confinement in PSU, while its emission quantum yield was reduced from 82 to 59 %.

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Section: Studies Of 1 Confined In Psu (1/psu)mentioning

confidence: 99%

A Europium(III) Complex Embedded in a Polysulfone Host Matrix: A Flexible Film with Temperature‐Responsive Ratiometric Behaviour

et al. 2020

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“…It is transparent, amorphous polymer with high strength and high heat resistance [16]. It has glass transition temperature in the range from 180 to 250°C [17]. The polymer is hydrolytically stable and can undergo repeated cycles of steam sterilization [17].…”

Section: Introductionmentioning

confidence: 99%

Optimization of PSF Membrane Transport Properties with the Use of Porogenic Additive

Dhume

Mahajan-Tatpate

Chendake

2020

AMST

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The porous membrane works upon sieving mechanism, where the separation and transport properties are dependent upon membrane morphology and porosity. This porosity and pore size are dependent upon membrane materials and formation parameters. Polysulfone (PSF) is one of the widely used membrane material due to its stability properties. Current work is targeted towards optimization of PSF based membranes by varying dope solution concentration and composition with the use of polyethylene glycol (PEG (MW6000)) as porogen in dope solution to enhance the transport rate and selectivity. An increase in PEG rejection with linear decrease in water flux and pore size was observed with the increase in dope solution concentration. Uniform membranes formation without any abnormal pore-size is observed from transport properties. The use of PEG as porogen leads to increased porosity due to leaching of Porogen during the phase inversion, which resulted in enhanced transport rate (85%). Further the formed membranes maintained pore size as seen from bubble point, rejection and pore size analysis. This resulted in maintenance of selectivity. Such increased transport with high selectivity is highly essential when applicability of membranes in industrial processes like process separation and waste treatment are considered. This would lead to large industrial benefits.

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“…The polymeric membranes have several advantages, and they have been used in various applications in industrial processes, such as in processes of separation, purification and fractionation of various industrial branches 3,7 . The main processes in which membranes are being used are microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), reverse osmosis (HI), dialysis (D), gas permeation (GP) and pervaporation (PV).…”

Section: Introductionmentioning

confidence: 99%

Coagulation Bath in The Production of Membranes of Nanocomposites Polyamide 6/Clay

et al. 2018

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Membranes of polyamide 6 and its nanocomposites with 3 and 5% of clay were obtained by the phase inversion method using distilled water and solvent as the coagulation bath, 10 and 30% of acid was used, in order to change the membranes morphology/porosity. By XRD analysis, the obtained nanocomposites showed an exfoliated and/or partially exfoliated structure, it was also seen two characteristics peaks of the polyamide 6 phases (α and γ). For the membranes, the characteristic peak γ of the membrane disappeared, being evident the peaks α 1 and α 2. By SEM the PA6 membrane almost doesn't have pores in its surface, with an addition of clay had an increase in the quantity of surface pores. In the cross section of the PA6 membrane, an extremely thin selective layer, adding the clay the selective layer became thicker and a better defined porous support was obtained. From the acid in the coagulation bath the PA6 membrane continued with a few pores structure. For the nanocomposites there was an increase in size and a better uniformity of the pores. In the cross section the presence of the bath decrease the membrane filtering, also modifying a uniformity of the pores.

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Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

Cited by 55 publications

References 47 publications

A Europium(III) Complex Embedded in a Polysulfone Host Matrix: A Flexible Film with Temperature‐Responsive Ratiometric Behaviour

A Europium(III) Complex Embedded in a Polysulfone Host Matrix: A Flexible Film with Temperature‐Responsive Ratiometric Behaviour

Optimization of PSF Membrane Transport Properties with the Use of Porogenic Additive

Coagulation Bath in The Production of Membranes of Nanocomposites Polyamide 6/Clay

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