Transport properties and mechanical behavior of poly(methyl‐phenylsiloxane) membranes as a function of methyl to phenyl groups ratio

Erdmann, Eleonora; Destéfanis, Hugo Alberto; Abalos, R.; Frontini, Patricia María; Abraham, Gustavo Abel

doi:10.1002/app.10710

Cited by 3 publications

(3 citation statements)

References 19 publications

(29 reference statements)

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“…Polyorganosiloxanes are a class of polymers that have attracted the interest of many researchers because of their versatility for tailoring materials with different properties 1. Some of the emerging applications of polysiloxane‐containing materials include their pyrolytic conversion in ceramic bodies2–5 and their use as membranes for different applications 6–15…”

Section: Introductionmentioning

confidence: 99%

Partially pyrolyzed poly(dimethylsiloxane)‐based networks: Thermal characterization and evaluation of the gas permeability

José

Prado

Schiavon

et al. 2006

J Polym Sci B Polym Phys

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In this investigation, the preparation and characterization of partially pyrolyzed membranes based on poly(dimethylsiloxane) (PDMS) are described. These membranes were obtained by the crosslinking of silanol‐terminated PDMS with multifunctional nanoclusters derived from the reaction of pentaerythritoltriacrylate with 2‐aminoethyl‐3‐aminopropyltrimethoxysilane and the in situ polycondensation of tetraethylortosilicate, followed by the thermal treatment of the resulting membranes at different temperatures. The partially pyrolyzed membranes were characterized with infrared spectroscopy, thermogravimetry, elemental analyses, dynamic mechanical analysis, small‐angle X‐ray scattering, and scanning electron microscopy. The membranes exhibited improvements in the thermal stability and mechanical strength. Even with distinct compositions with respect to the Si/O and Si/C ratios, the flexibility of these materials was maintained. The flux rates of the gases through the membranes were measured for N2, H2, O2, CH4, and CO2, at 25 °C. The permeability of the membranes changed with increases in the pyrolysis and oxidation temperatures. These membranes could be described as PDMS chains separated by inorganic clusters. © 2006 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 299–309, 2007.

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Section: Introductionmentioning

confidence: 99%

Partially pyrolyzed poly(dimethylsiloxane)‐based networks: Thermal characterization and evaluation of the gas permeability

José

Prado

Schiavon

et al. 2006

J Polym Sci B Polym Phys

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“…The elastomeric nature of polysiloxanes is well known, having glass transition temperature well below room temperature (−125 ÷ −90) °C. They are soft and pliable, with an elongation at break in the range (100 ÷ 500) % tensile strength around (5 ÷ 10) MPa and Young modulus variable between 1 MPa and 3 MPa, although the presence of phenyl side groups might affect these features 34 . It is evident that well-performing plastic commercial scintillators (e.g., EJ-212) have much more limited flexibility, due to their rigid base polymers, i.e., polystyrene or polyvinyltoluene (Fig.…”

Section: Scintillator Performancementioning

confidence: 99%

Flexible fully organic indirect detector for megaelectronvolts proton beams

Calvi

Basiricò²,

Carturan³

et al. 2023

npj Flex Electron

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A flexible, fully organic detector for proton beams is presented here. The detector operates in the indirect mode and is composed of a polysiloxane-based scintillating layer coupled to an organic phototransistor, that is assessed for flexibility and low-voltage operation (V = −1 V), with a limit of detection of 0.026 Gy min−1. We present a kinetic model able to precisely reproduce the dynamic response of the device under irradiation and to provide further insight into the physical processes controlling it. This detector is designed to target real-time and in-situ dose monitoring during proton therapy and demonstrates mechanical flexibility and low power operation, assessing its potential employment as a personal dosimeter with high comfort and low risk for the patient. The results show how such a proton detector represents a promising tool for real-time particle detection over a large area and irregular surfaces, suitable for many applications, from experimental scientific research to innovative theranostics.

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“…PMPS is a polymer membrane in a sub -family of the polysiloxane with methyl group substituted by phenyl. The researchers believed that the substitution of phenyl group can enhance the selectivity of the membrane [21].…”

Section: Literature Reviewmentioning

confidence: 99%

Comparison Of Zsm - 5 And Poss Nanocomposite Pervaporation Membranes For Furfural/Water Separation

Sawatdiruk

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The recovery of furfural via a conventional separation technology like distillation and solvent extraction requires very large energy consumption and high amount of chemical solvent. Thus, there is a need for an alternative separation process that is economic and more energy friendly for the furfural recovery. Pervaporation is a well - recognized energy friendly and effective separation tool. If there is suitable pervaporation membrane with efficient separation performance, the pervaporation can be a promising replacement for the conventional separation method. Therefore, this thesis aims to develop a suitable membrane for furfural recovery via pervaporation process. In this work, the polydimethylsiloxane (PDMS) selective membranes with the addition of zeolite?socony?mobil?? 5 (ZSM ? 5),?octanitropheyl?(ONPS) and?octaaminophenyl?(OAPS) at various concentration (5 ? 20 wt%) were prepared. The result showed that membrane prepared with OAPS showed the best separation factor compared to membrane incorporated with other fillers. The low polarity of OAPS improved the interaction between the filler and furfural. The increase amount of OAPS filler loading could enrich the separation factor because the extra OAPS not only increased the furfural pathway but also decreased the water diffusion rate. The PDMS membrane with 15 wt% of OAPS could purify furfural from 3 wt% to 20 wt% furfural concentration. The increase of feed temperature would improve the total flux of membrane because the partial vapor pressure was increased. The separation factor was increased at the temperature ranged 30 ? 50 ?C then dropped at 60?C. While at feed temperature 60?C, the effect of free volume would have more impact over the increased of partial vapor pressure so the separation reduced.?

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Transport properties and mechanical behavior of poly(methyl‐phenylsiloxane) membranes as a function of methyl to phenyl groups ratio

Cited by 3 publications

References 19 publications

Partially pyrolyzed poly(dimethylsiloxane)‐based networks: Thermal characterization and evaluation of the gas permeability

Partially pyrolyzed poly(dimethylsiloxane)‐based networks: Thermal characterization and evaluation of the gas permeability

Flexible fully organic indirect detector for megaelectronvolts proton beams

Comparison Of Zsm - 5 And Poss Nanocomposite Pervaporation Membranes For Furfural/Water Separation

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