Recent developments in the field of barrier and permeability properties of segmented polyurethane elastomers

Marcano, Aracelys; Fatyeyeva, Kateryna; Koun, Malys; Dubuis, Pascal; Grimmé, Marc; Marais, Stéphane

doi:10.1515/revce-2017-0033

Cited by 21 publications

(28 citation statements)

References 182 publications

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“…Usually the transport of the species in a dense membrane is described by the “solution‐diffusion” mechanism 2,23,27 . The first step consists in the permeant molecules sorption on the membrane surface.…”

Section: Discussionmentioning

confidence: 99%

“…Due to their physicochemical properties, such as lightness, flexibility, and chemical resistance, polymer materials have numerous technological applications in different industrial and biomedical fields related to protective and functional coatings, non‐fouling biosurfaces, medical implants, separators, advanced membranes, and so on 1‐3 . However, because of certain industrial specifications, including mechanical, thermal, optical or barrier properties, some modifications (chemical and/or physical) of the polymer materials can be required.…”

Section: Introductionmentioning

confidence: 99%

“…and (2) surface treatment (namely, chemical grafting, plasma deposition, etc.) 1,2,12,17 . In each case, one should also remember that the surface properties are always different from the properties of the material bulk.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced water and oxygen barrier performance of flexible polyurethane membranes for biomedical application

Marcano

Fatyeyeva

Koun

et al. 2021

J Biomedical Materials Res

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In order to improve water and oxygen barrier properties, the surface of two commercial medical grade polyurethane (PU) membranes (Chronoflex® AR‐LT and Bionate® II) was modified by a spray deposited film of poly(ethylene‐co‐vinyl alcohol) (EVOH). The influence of the temperature, the deposited layer thickness and the EVOH ethylene group percentage (27%, 32%, and 44% for EVOH27, EVOH32, and EVOH44, respectively) on the barrier properties of the PU/EVOH multilayered membranes was investigated. The increase of the EVOH layer thickness leads to higher oxygen barrier properties (the highest barrier improvement factor of 412 was obtained). However, in case of the deposited layer thickness higher than 18 μm, microcracks appeared on the treated surface promote a significant loss of the barrier effect. Due to its higher crystallinity degree, EVOH27 provides a higher oxygen barrier effect compared to EVOH32 and EVOH44. On the contrary, an increase of the water barrier properties was observed with the increase of the percentage of ethylene groups. Moreover, the delamination of the EVOH layer was noted after water permeation, especially in case of EVOH44, which is the most hydrophobic layer. Nevertheless, significant decrease of the water and oxygen permeability of the modified PU membranes was achieved, thus showing the benefit of using the EVOH spray deposition for the biomedical application, which requires high performance material with flexible and barrier properties.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced water and oxygen barrier performance of flexible polyurethane membranes for biomedical application

Marcano

Fatyeyeva

Koun

et al. 2021

J Biomedical Materials Res

Self Cite

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“…The poor elasticity of the two segmented PUs was caused by their low molecular weight which, in turn, influences the morphology of the segmented PUs [27]. Hetflejš et al [28] illustrated that the stabilizing efficiency of polymer-linked structures could be compared with that of their low-molecular-weight analogs, physically admixed with the PU.…”

Section: Polyurethane Compositementioning

confidence: 99%

Investigating Physio-Thermo-Mechanical Properties of Polyurethane and Thermoplastics Nanocomposite in Various Applications

et al. 2021

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The effect of the soft and hard polyurethane (PU) segments caused by the hydrogen link in phase-separation kinetics was studied to investigate the morphological annealing of PU and thermoplastic polyurethane (TPU). The significance of the segmented PUs is to achieve enough stability for further applications in biomedical and environmental fields. In addition, other research focuses on widening the plastic features and adjusting the PU–polyimide ratio to create elastomer of the poly(urethane-imide). Regarding TPU- and PU-nanocomposite, numerous studies investigated the incorporation of inorganic nanofillers such as carbon or clay to incorporating TPU-nanocomposite in several applications. Additionally, the complete exfoliation was observed up to 5% and 3% of TPU–clay modified with 12 amino lauric acid and benzidine, respectively. PU-nanocomposite of 5 wt.% Cloisite®30B showed an increase in modulus and tensile strength by 110% and 160%, respectively. However, the nanocomposite PU-0.5 wt.% Carbone Nanotubes (CNTs) show an increase in the tensile modulus by 30% to 90% for blown and flat films, respectively. Coating PU influences stress-strain behavior because of the interaction between the soft segment and physical crosslinkers. The thermophysical properties of the TPU matrix have shown two glass transition temperatures (Tg’s) corresponding to the soft and the hard segment. Adding a small amount of tethered clay shifts Tg for both segments by 44 °C and 13 °C, respectively, while adding clay from 1 to 5 wt.% results in increasing the thermal stability of TPU composite from 12 to 34 °C, respectively. The differential scanning calorimetry (DSC) was used to investigate the phase structure of PU dispersion, showing an increase in thermal stability, solubility, and flexibility. Regarding the electrical properties, the maximum piezoresistivity (10 S/m) of 7.4 wt.% MWCNT was enhanced by 92.92%. The chemical structure of the PU–CNT composite has shown a degree of agglomeration under disruption of the sp2 carbon structure. However, with extended graphene loading to 5.7 wt.%, piezoresistivity could hit 10-1 S/m, less than 100 times that of PU. In addition to electrical properties, the acoustic behavior of MWCNT (0.35 wt.%)/SiO2 (0.2 wt.%)/PU has shown sound absorption of 80 dB compared to the PU foam sample. Other nanofillers, such as SiO2, TiO2, ZnO, Al2O3, were studied showing an improvement in the thermal stability of the polymer and enhancing scratch and abrasion resistance.

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“…As summarized in Table S1, increased decomposition temperature (T onset ) was found in FSPU-5 and FSPU-10 but started to decrease from FSPU-15. This change might due to weakened inter-chain interactions [28]. To investigate how the star-shaped cross-linker affects the polymer performance, we fixed the feeding ratio of the PPG to HDI with 1:2 for the purpose to get the prepolymer with ending isocyanate groups.…”

Section: Thermal Behavior Analysismentioning

confidence: 99%

Star-Shaped Crosslinker for Multifunctional Shape Memory Polyurethane

Song

Liu

et al. 2020

Polymers

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Star-shaped cyclophosphazene (ACP) was employed as covalent crosslinker to form a rigid segment in polyurethanes network, to enhance the mechanical performance and to add extra flame retardant property. The effects of different ACP contents on the shape memory ability and fire resistance performance of polyurethane (PU) were studied. Tensile tests suggested high flexibility of the PUs with the maximum elongation-at-break of 161.59%. Dynamic mechanical analysis (DMA) indicated good shape recovery ratio of 72.58% after more than three repeated cycles. Under thermal treatment, the temporary shape could recover to its original state in 10 s. The peak heat release rate (pHRR), total heat released (THR) and temperature at pHRR (Tp) of flame-retardant shape memory polyurethane (FSPU) by micro-combustion calorimeter (MCC) was as low as 183.2 W/g, 21.4 KJ/g, 330.8 °C respectively, suggesting good inherent fire-resistant performance. As amine-containing crosslinkers are one of the most common building units in thermosetting polymers, we anticipate that our finding will have significant benefits beyond shape memory and fire-resistance.

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Recent developments in the field of barrier and permeability properties of segmented polyurethane elastomers

Cited by 21 publications

References 182 publications

Enhanced water and oxygen barrier performance of flexible polyurethane membranes for biomedical application

Enhanced water and oxygen barrier performance of flexible polyurethane membranes for biomedical application

Investigating Physio-Thermo-Mechanical Properties of Polyurethane and Thermoplastics Nanocomposite in Various Applications

Star-Shaped Crosslinker for Multifunctional Shape Memory Polyurethane

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