The Solubility of Gases in Aqueous Solutions of Poly(propylene glycol)

King, A. D.

doi:10.1006/jcis.2001.7913

Cited by 18 publications

(6 citation statements)

References 9 publications

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“…It is interesting to compare these solubilities with those measured for the same gases in liquid poly(propylene glycol) which might be expected to have sorptive properties that closely resemble those of the core regions within Pluronic micelles (34). The 1-atm solubilities determined at 25…”

Section: Resultsmentioning

confidence: 98%

“…While the data recorded in Ref. 34 will not be reproduced here for the sake of brevity, one set of solubilities, those for CH 4 , C 2 H 6 , and C 3 H 8 in 90 wt% PPG solutions are of sufficient interest to be repeated here. The 1-atm solubilities of for these gases at 25…”

Section: Resultsmentioning

confidence: 98%

“…The solubilities quoted for the gases in pure poly(proplyene glycol) are part of a larger study (34) in which gas solubilities were determined for aqueous solutions of poly(propylene glycol) spanning a wide range of water content. It was found that gas solubilities in PPG-rich solutions were very sensitive to water content and decreased markedly with increasing water content.…”

Section: Resultsmentioning

confidence: 99%

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Solubilization of Gases by Poly(ethylene oxide)–Poly(propylene oxide) Triblock Copolymers

King

2001

Journal of Colloid and Interface Science

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

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Solubilization of Gases by Poly(ethylene oxide)–Poly(propylene oxide) Triblock Copolymers

King

2001

Journal of Colloid and Interface Science

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“…It has been reported that heavier hydrocarbons are more soluble in PPO relative to lighter hydrocarbons and this observation is reflected in Figure a,b, which shows the modeled micellar radii and the volume fraction of ethane and propane in the cores of the F127 micelles, respectively. The greater swelling with propane may also be due to the greater density of propane compared to ethane at the experimental pressures.…”

Section: Resultsmentioning

confidence: 57%

Swelling of Ionic and Nonionic Surfactant Micelles by High Pressure Gases

O’Callaghan

McNamara²,

Copley

et al. 2010

Langmuir

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The influence of different solvent environments on the size, shape, and characteristics of surfactant micelles of Pluronic F127 and CTAB was investigated by small-angle neutron scattering (SANS). SANS experiments were undertaken on dilute micellar surfactant solutions of F127 and CTAB that between them were exposed to liquid and supercritical carbon dioxide, liquid propane, ethane, and heptane under various pressures and temperatures. Swelling of the surfactant micelles could be directly related to the solubility of the solvents within the micelles, especially within their cores. Carbon dioxide produced the largest swelling of the Pluronic F127 micelles, compared to propane and ethane, which mirrors the solubility of the gases in the PPO core of the micelles. Conversely, the extent of swelling of the cores of CTAB micelles was greater with propane compared to carbon dioxide, which again relates to the solubility of the solvents in the alkane core of the CTAB micelles.

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“…The presence of dissolved salts and glycerol is expected to reduce the solubility of Xe in solution by 9.3% [40] and 5.7% [41] relative to water, respectively. At the concentrations used in this study, propylene glycol is not expected to affect the solubility of Xe relative to the aqueous solution [42]. Based on the partition coefficient of Xe in aqueous solutions 0.089 [43], headspace analysis is expected to underestimate the measured dose of Xe by 8.2%.…”

Section: Quantification Of Xe Dosementioning

confidence: 83%

Characterization and Imaging of Lipid-Shelled Microbubbles for Ultrasound-Triggered Release of Xenon

et al. 2019

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Xenon (Xe) is a bioactive gas capable of reducing and stabilizing neurologic injury in stroke. The goal of this work was to develop lipid-shelled microbubbles for xenon loading and ultrasound-triggered release. Microbubbles loaded with either xenon (Xe-MB) or xenon and octafluoropropane (Xe-OFP-MB) (9:1 v/v) were synthesized by high-shear mixing. The size distribution and the frequency-dependent attenuation coefficient of Xe-MB and Xe-OFP-MB were measured using a Coulter counter and a broadband acoustic attenuation spectroscopy system, respectively. The Xe dose was evaluated using gas chromatography/mass spectrometry. The total Xe doses in Xe-MB and Xe-OFP-MB were 113.1 ± 13.5 and 145.6 ± 25.5 μl per mg of lipid, respectively. Co-encapsulation of OFP increased the total xenon dose, attenuation coefficient, microbubble stability (in an undersaturated solution), and shelf life of the agent. Triggered release of gas payload was demonstrated with 6-MHz duplex Doppler and 220-kHz pulsed ultrasound. These results constitute the first step toward the use of lipid-shelled microbubbles for applications such as neuroprotection in stroke.

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The Solubility of Gases in Aqueous Solutions of Poly(propylene glycol)

Cited by 18 publications

References 9 publications

Solubilization of Gases by Poly(ethylene oxide)–Poly(propylene oxide) Triblock Copolymers

Solubilization of Gases by Poly(ethylene oxide)–Poly(propylene oxide) Triblock Copolymers

Swelling of Ionic and Nonionic Surfactant Micelles by High Pressure Gases

Characterization and Imaging of Lipid-Shelled Microbubbles for Ultrasound-Triggered Release of Xenon

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