Gas separation through polyurethane–<scp>ZnO</scp> mixed matrix membranes and mathematical modeling of the interfacial morphology

Fakhar, Afsaneh; Maghami, Saeid; Sameti, Elham; Shekari, Monireh; Sadeghi, Morteza

doi:10.1002/pls2.10023

Cited by 11 publications

(6 citation statements)

References 48 publications

(79 reference statements)

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“…A very viscose polymer was obtained. To ensure the completion of the reaction, the postreaction was performed by keeping the product in an oven at 95°C for 24 h. The molar ratio of NCO:OH was 1:1, and the molar ratio of polyol:HDI:BDO was 1:3:2, to prepare a linear polymer 45 …”

Section: Methodsmentioning

confidence: 99%

Gas permeation through polyethylene glycol/polytetramethylene glycol based polyurethane–silica mixed matrix membranes and interfacial morphology study via modeling approach

Fakhar

Zarabadipoor

Talakesh

et al. 2023

J of Applied Polymer Sci

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A series of mixed matrix membranes (MMMs) based on polyurethane (PU) and silica nanoparticles was fabricated. Three types of PU were synthesized with different polyethylene glycol (PEG)/polytetramethylene glycol ratios (PU0, PU75, and PU100, the corresponding numbers: PEG percent). The MMMs were characterized using FTIR, SEM, and gas permeation measurements (N 2 , O 2 , CH 4 , and CO 2 ). The phase mixing of PU0 and PU75 membranes increased with silica content. This resulted in a decrease in gas permeability, while an increase in CO 2 /CH 4 and CO 2 /N 2 selectivities. The gas separation trend for PU100 membranes was the opposite. The molecular probing approach was served to study the interfacial structure of the MMMs. The existence of a rigidified polymer layer with 2.38 and 2.44 nm thicknesses around silica was revealed through PU0 and PU75 membranes, respectively. In contrary, silica was surrounded by a polymer chain dilution interphase with a thickness of 2.20 nm for PU100 MMMs.

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Section: Methodsmentioning

confidence: 99%

Gas permeation through polyethylene glycol/polytetramethylene glycol based polyurethane–silica mixed matrix membranes and interfacial morphology study via modeling approach

Fakhar

Zarabadipoor

Talakesh

et al. 2023

J of Applied Polymer Sci

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“…According to our findings from the characterization of the TPU membranes, the differences in the pressure dependency of the gas permeabilities could be ascribed to the differences in the microstructure of the samples, so the main aspects are: (i) the amount of the hard segment, (ii) the degree of microphase mixing, (iii) the degree of crystallinity, and iv) the FFV of the copolymer. The hard segment in the TPU copolymers is quite glassy and have not enough chain mobility to create the void space needed for the gas diffusion 52 . Moreover, this portion with a high degree of the structure order, may crystallize easily in some cases (HDI as isocyanate) and can be impermeable 10,40 .…”

Section: Gas Separation Performancementioning

confidence: 99%

A thermodynamic study on relationship between gas separation properties and microstructure of polyurethane membranes

Sadeghian

Raisi

2023

Sci Rep

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The lattice fluid (LF) thermodynamic model and extended Vrentas’ free-volume (E-VSD) theory were coupled to study the gas separation properties of the linear thermoplastic polyurethane (TPU) membranes with different chemical structures by analyzing their microstructures. A set of characteristic parameters were extracted using the repeating unit of the TPU samples and led to prediction of reliable polymer densities (AARD < 6%) and gas solubilities. The viscoelastic parameters, which were obtained from the DMTA analysis, were also estimated the gas diffusion vs. temperature, precisely. The degree of microphase mixing based on the DSC analysis was in order: TPU-1 (4.84 wt%) < TPU-2 (14.16 wt%) < TPU-3 (19.92 wt%). It was found that the TPU-1 membrane had the highest degree of crystallinity, but showed higher gas solubilities and permeabilities because this membrane has the least degree of microphase mixing. These values, in combination with the gas permeation results, showed that the content of the hard segment along with the degree of microphase mixing and other microstructural parameters like crystallinity were the determinative parameters.

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“…Polyurethane (PU) is one of the remarkable material which has versatile properties like outstanding flexibility, good stability, better adhesion features based on its chemical structure which makes it a polymer with wider applicability. [ 1,2 ] Polyurethane is generally prepared using condensation reaction between the polyols and polyisocyanates in the presence of catalyst and sometimes chain extenders are also added for its preparation technique. [ 3 ] The common precursors for the PU are polyisocyanates and polyols.…”

Section: Introductionmentioning

confidence: 99%

Bio‐based polyurethane‐graphene composites for adhesive application

Tiwari

Chhaunker²,

Maiti

2023

SPE Polymers

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Natural oil-based polyurethanes are prepared through solvent-less and easily processable approach for adhesive applications. The polyurethane is optimized through varying the volume fractions of the precursors which was then confirmed through the different analyses to achieve the better combination for composite formation with graphene. The graphene-polyurethane composites are processed in a simple hand mixing process with different graphene loadings and the role of the addition of graphene is studied using different analyses. The addition of graphene and the interaction with the polymer is well established through structural and thermal studies. The increase in the mechanical property with the addition of graphene to adequate amount at room temperature confirms better interfacial interaction with the polymer.The maximum peel strength obtained for the PU is around 1.05 N/mm, which supports the applicability of the prepared material for adhesive-based applications.

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Gas separation through polyurethane–ZnO mixed matrix membranes and mathematical modeling of the interfacial morphology

Cited by 11 publications

References 48 publications

Gas permeation through polyethylene glycol/polytetramethylene glycol based polyurethane–silica mixed matrix membranes and interfacial morphology study via modeling approach

Gas permeation through polyethylene glycol/polytetramethylene glycol based polyurethane–silica mixed matrix membranes and interfacial morphology study via modeling approach

A thermodynamic study on relationship between gas separation properties and microstructure of polyurethane membranes

Bio‐based polyurethane‐graphene composites for adhesive application

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