Characterization of the polymer/particle interphase in composite materials by molecular probing

Maghami, Saeid; Shahrooz, Mahdi; Mehrabani-Zeinabad, Arjomand; Zornoza, Beatriz

doi:10.1016/j.polymer.2020.122792

Cited by 21 publications

(18 citation statements)

References 81 publications

(57 reference statements)

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“…In our previous work we developed a new approach for this purpose. [ 43 ] In our method, gas molecules are employed as probes to determine the changes in dynamics of polymer chains around the particles. By measuring gas transport properties of the composites, their macroscopic permeation properties can be described in terms of their microscopic properties.…”

Section: Resultsmentioning

confidence: 99%

“…In the case of polymer chain dilution β max is determined by parallel model as described in our previous work. [ 43 ] Moreover, l max is a large enough interphase thickness to achieve the global minimum in the plot of percentage of average absolute relative error (% AARE ) versus l I (see Figure 10(B)).…”

Section: Resultsmentioning

confidence: 99%

“…The presence of interfacial morphology in PU/ZnO nanocomposites was investigated by molecular probing approach where developed in our previous study. [ 43 ]…”

Section: Methodsmentioning

confidence: 99%

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

et al. 2020

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A series of polyurethane/ZnO membranes was fabricated via thermal phase inversion of the solution of polymer/nanoparticle in N,N‐dimethylformamide solvent. The polyurethane synthesis was done via two‐step polymerization method using polytetramethylene glycol, isophorone diisocyanate, and 1,4‐butanediol in the ratio of 1:3:2. Different concentrations of zinc oxide nanoparticles (5, 10, 15, and 20) were incorporated into the polyurethane matrix. FTIR, SEM, and X‐Ray analysis were performed to characterize the membranes. FTIR and SEM results suggests an increment in the phase mixing of polyurethane with ZnO loading. Gas permeation performance through polyurethane‐ZnO mixed matrix membranes with ZnO loading by as much as 20 wt% were elucidated for pure N2, O2, CH4, and CO2 and gases. Based on the results, all permeability values decreased as the loading of ZnO nanoparticles increased, whereas CO2/N2 and CO2/CH4 selectivities increased. Moreover, interfacial structure of the polyurethane/ZnO nanocomposites were characterized by molecular probing approach. The results revealed the presence of a rigidified polymer chain layer with 65 ± 6 Å thickness around the ZnO nanoparticles.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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

et al. 2020

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“…[ 35–37 ] The compatibility strength between polymer matrices and particles results in interfacial non‐idealities, which affect the separation properties of the MMMs. [ 38–45 ] The nature of the polymer–particle interface can be categorized in two scenarios of polymer chain dilution and rigidification, which is followed by permeability enhancement and decrement, respectively. Moreover, it is expected that interfacial polymer chain dilution and rigidification diminish and promote selectivity of composites, respectively, compared to the neat polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Influence of solvent, Lewis acid–base complex, and nanoparticles on the morphology and gas separation properties of polysulfone membranes

Maghami

Sadeghi

Baghersad

et al. 2021

Polymer Engineering & Sci

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A series of polysulfone (PSF) membranes were prepared using different solvents: dimethylformamide (DMF), tetrahydrofuran, dimethylacetamide, and n‐methyl‐2‐pyrrolidone (NMP). The PSF membrane prepared by NMP showed the highest gas permeability. The influence of propionic acid as a Lewis acid on gas separation properties of the PSF was explored. The PSF membrane prepared by the casting solution containing 25 wt% PSF, 35 wt% propionic acid, and 40 wt% NMP showed a superior gas separation performance. The gas permeation measurements indicated that incorporating 30 wt% γ‐alumina nanoparticles into the PSF matrix resulted in about the respective 43% and 41% increase in CO2 and O2 permeability together with a rise in CO2/CH4 and O2/N2 selectivities (13% and 7%, respectively). Furthermore, by rearranged modified Maxwell model, the role and nature of the interfacial layer in the PSF‐based mixed matrix membranes were mathematically analyzed considering a reduced permeability factor.

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“…As the interfacial layer is difficult to be characterized by experimental techniques, our previous studies indicated that mathematical modeling can be used to gain insight into it. [ 29,30 ] We showed that modeling of the interfacial properties not only significantly depends on the assumed interface thickness but also is related to the modeling algorithm. In that study, a new algorithm was developed to estimate the layer thickness based on findings of molecular dynamics, Monte Carlo simulations, particle size, and loading level.…”

Section: Introductionmentioning

confidence: 99%

Determination of maximum possible contribution of porous particles in gas transport properties of their corresponding mixed matrix membranes

Maghami

Sadeghi

Simiari³

2020

SPE Polymers

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Due to the partial/total blockage of dispersed porous particles in polymer matrices, porous particles do not change the transport properties of mixed matrix membranes (MMMs) as much as possible. Also, the determination of MMMs' intrinsic gas permeability is very difficult. Hence, a new modeling approach was developed to determine the maximum contribution of porous particles in gas separation properties of MMMs without any need to know the interfacial morphology type. Moreover, the approach allowed determination of the effect of the interfacial layer on gas transport properties of MMMs containing porous particles. The validity of the proposed method was evaluated using literature data in which the intrinsic permeability of the used particles and polymer matrix for the preparation of their MMMs has been measured.

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Characterization of the polymer/particle interphase in composite materials by molecular probing

Cited by 21 publications

References 81 publications

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

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

Influence of solvent, Lewis acid–base complex, and nanoparticles on the morphology and gas separation properties of polysulfone membranes

Determination of maximum possible contribution of porous particles in gas transport properties of their corresponding mixed matrix membranes

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