Solubilities and diffusion coefficients of carbon dioxide and nitrogen in poly(methyl methacrylate) at high temperatures and pressures

Ushiki, Ikuo; Hayashi, Souta; Kihara, Sorin; Takishima, Shigeki

doi:10.1016/j.supflu.2019.104565

Cited by 30 publications

(16 citation statements)

References 51 publications

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“…At 40 °C and 30 MPa the PMMA sample contains 22 wt% CO 2 while at 130 °C and 30 MPa it contains 26 wt% CO 2 . These results are quite consistent with values measured by gravimetric methods, as shown in Figure 7 [12], [17].…”

Section: Co 2 Sorption Through Ftir Spectra Recoverysupporting

confidence: 91%

“…CO 2 sorption into polymers can be characterized by various methods or devices : gravimetric method [12], [13], quartz microbalance (QCM) [14], [15], [16] or magnetic suspension balance (MSB) [17], [18]. All of them consist in calculating the mass variation before and after CO 2 saturation but the fast desorption of the sample induces some errors on the % mass CO 2 determination.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

FTIR in situ measurement of swelling and CO2 sorption in acrylic polymers at high CO2 pressures

Haurat

Tassaing

Dumon

2022

The Journal of Supercritical Fluids

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Section: Co 2 Sorption Through Ftir Spectra Recoverysupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

FTIR in situ measurement of swelling and CO2 sorption in acrylic polymers at high CO2 pressures

Haurat

Tassaing

Dumon

2022

The Journal of Supercritical Fluids

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“…Finally, P i,Gr and P j,PMMA stand for the testing gas permeability coefficient through the i-th and j-th graphene and PMMA layer, respectively. Due to the low values of penetrant concentration expected to occur within the polymeric phases [25], one can reasonably assume that P j,PMMA does not depend significantly upon the position of the specific j-th layer. Moreover, when the number of PMMA/Gr layer sandwiches is sufficiently high to allow a reliable statistically "averaged" approach, one can also assume a unique "average" value for P i,Gr within the system, so that the second equality in Equation (3) holds true.…”

Section: Results Of Permeability Measurementsmentioning

confidence: 99%

“…All these calculations are automatically performed by the software governing the apparatus. In the operating conditions of the experiments, since the nitrogen solubility is much smaller than those of oxygen, carbon dioxide and water [22][23][24][25], the effects of nitrogen on the measured permeabilities can be neglected. Tests were performed on 3.5 × 3.5 cm membranes; using adhesive Al masks (standard masks provided by the manufacturer of the permeabilimeter) to reduce the exposed surface, the actual area subjected to the flux was, however, a circle of 2.01 cm 2 .…”

Section: Permeability Measurementsmentioning

confidence: 99%

Chemical Vapour Deposition Graphene–PMMA Nanolaminates for Flexible Gas Barrier

et al. 2022

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Successful ways of fully exploiting the excellent structural and multifunctional performance of graphene and related materials are of great scientific and technological interest. New opportunities are provided by the fabrication of a novel class of nanocomposites with a nanolaminate architecture. In this work, by using the iterative lift-off/float-on process combined with wet depositions, we incorporated cm-size graphene monolayers produced via Chemical Vapour Deposition into a poly (methyl methacrylate) (PMMA) matrix with a controlled, alternate-layered structure. The produced nanolaminate shows a significant improvement in mechanical properties, with enhanced stiffness, strength and toughness, with the addition of only 0.06 vol% of graphene. Furthermore, oxygen and carbon dioxide permeability measurements performed at different relative humidity levels, reveal that the addition of graphene leads to significant reduction of permeability, compared to neat PMMA. Overall, we demonstrate that the produced graphene–PMMA nanolaminate surpasses, in terms of gas barrier properties, the traditional discontinuous graphene–particle composites with a similar filler content. Moreover, we found that the gas permeability through the nanocomposites departs from a monotonic decrease as a function of relative humidity, which is instead evident in the case of the pure PMMA nanolaminate. This work suggests the possible use of Chemical Vapour Deposition graphene–polymer nanolaminates as a flexible gas barrier, thus enlarging the spectrum of applications for this novel material.

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“…Li et al calculated the diffusion coefficient using the Arrhenius equation [25]. Ushiki et al fitted solubility data for the diffusion coefficient using the Sanchenz-Lancomb equation of state [26].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Experiment for the Diffusion Coefficient of Subcritical Carbon Dioxide in Poly(methyl methacrylate) to Predict Gas Sorption and Desorption

Kim

Ryu

et al. 2022

Polymers

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Several researchers have investigated the phenomenon of polymer–gas mixtures, and a few have proposed diffusion coefficient values instead of a diffusion coefficient model. There is a paucity of studies focused on the continuous change in the diffusion coefficient corresponding to the overall pressure and temperature range of the mixture. In this study, the gas sorption and desorption experiments of poly(methyl methacrylate) (PMMA) were conducted via solid-state batch foaming, and the weight change was measured using the gravimetric method with a magnetic balance. The control parameters were temperature, which ranged from 290 to 370 K, and pressure, which ranged from 2 to 5 MPa; in the subcritical regime. Based on the experimental data, the diffusion coefficient of the PMMA was calculated using Fick’s law. After calculating the diffusion coefficient in the range of the experiment, the diffusion coefficient model was employed using the least-squares method. Subsequently, the model was validated by comparing the obtained results with those in the literature, and the overall trend was found to be consistent. Therefore, it was confirmed that there were slight differences between the diffusion coefficient obtained using only Fick's equation and the value using by a different method.

show abstract

Solubilities and diffusion coefficients of carbon dioxide and nitrogen in poly(methyl methacrylate) at high temperatures and pressures

Cited by 30 publications

References 51 publications

FTIR in situ measurement of swelling and CO2 sorption in acrylic polymers at high CO2 pressures

FTIR in situ measurement of swelling and CO2 sorption in acrylic polymers at high CO2 pressures

Chemical Vapour Deposition Graphene–PMMA Nanolaminates for Flexible Gas Barrier

Modeling and Experiment for the Diffusion Coefficient of Subcritical Carbon Dioxide in Poly(methyl methacrylate) to Predict Gas Sorption and Desorption

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