Adsorption and desorption of a wetting fluid in Vycor studied by acoustic and optical techniques

Page, John H.; Liu, J.; Abeles, B.; Herbolzheimer, E.; Deckman, H. W.; Weitz, David A.

doi:10.1103/physreve.52.2763

Cited by 82 publications

(149 citation statements)

References 19 publications

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“…Adsorptive smoothing has also been observed with benzene [30]. Power law scattering, I (q) ∼ q −2.27±0.05 , is observed at low q, which may indicate that drainage occurs via percolation [4,5,23,27,35,36]. The theoretical value for scattering from a sample spanning cluster in an infinite three-dimensional lattice is D v = 2.53 [37].…”

Section: Resultsmentioning

confidence: 77%

“…D v data in the range 1.51-1.79 have been obtained from previous SANS experiments with other mesoporous solids [23,27,35,36]. The difference between the theoretical and the experimental D v values has been attributed to the short length scales of ∼1 nm to ∼50 nm probed by SANS [4,5]. The ramification of the cluster may then be restricted by the available pore space.…”

Section: Resultsmentioning

confidence: 96%

“…On the one hand molecular simulations, density functional theory, and recent experiments suggest that hysteresis is due to multiple metastable states which are induced by the disorder of the solid matrix [1][2][3]. On the other hand, experiments show, that drainage of n-hexane from Vycor occurs via percolation [4][5][6]. The latter is assumed to be caused by pore blocking: smaller pores retard the drainage of larger pores if the larger pores are connected to the sample surface by the smaller ones only.…”

Section: Introductionmentioning

confidence: 99%

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In situ small-angle neutron scattering study of nitrogen adsorption and condensation in mesoporous silica glass CPG-10-75

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Section: Resultsmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 96%

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In situ small-angle neutron scattering study of nitrogen adsorption and condensation in mesoporous silica glass CPG-10-75

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“…This change was not only shown by Monte Carlo simulations 132 but also measured in ultrasonic experiments. 133,134 In particular, it was shown that the change in the elastic modulus of the adsorbed fluid is linearly related to the adsorption stress in the pores. 135,136 E. Surface stress approach…”

Section: Coupling Between Thermodynamic and Elastic Aspects Of Adsmentioning

confidence: 99%

Adsorption-induced deformation of nanoporous materials—A review

Gor

Huber

Bernstein

2017

Applied Physics Reviews

222

214

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When a solid surface accommodates guest molecules, they induce noticeable stresses to the surface and cause its strain. Nanoporous materials have high surface area and, therefore, are very sensitive to this effect called adsorption-induced deformation. In recent years, there has been significant progress in both experimental and theoretical studies of this phenomenon, driven by the development of new materials as well as advanced experimental and modeling techniques. Also, adsorption-induced deformation has been found to manifest in numerous natural and engineering processes, e.g., drying of concrete, water-actuated movement of non-living plant tissues, change of permeation of zeolite membranes, swelling of coal and shale, etc. In this review, we summarize the most recent experimental and theoretical findings on adsorption-induced deformation and present the state-of-the-art picture of thermodynamic and mechanical aspects of this phenomenon. We also reflect on the existing challenges related both to the fundamental understanding of this phenomenon and to selected applications, e.g., in sensing and actuation, and in natural gas recovery and geological CO2 sequestration.

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“…From the experimental point of view, while the average behavior, e.g. sorption isotherms, can easily be measured by a variety of experimental techniques, the microscopic topological distribution of the fluid density in the pore matrices is much more difficult to access (Page et al 1995;Jähnert et al 2009). …”

mentioning

confidence: 98%

Diffusion and phase equilibria of binary fluids in mesopores

2010

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The formation of adsorption hysteresis in mesoporous material with random pore structure may be interrelated with different distributions of the fluid density attained along different paths of the system preparation. To access microscopic details of these distributions, in addition to the main sorptive liquid, distribution of which along the pore space of Vycor porous glass was of interest, a small amount of a probe liquid with a substantially lower vapor pressure has been added. Molecular diffusivities of both liquids then have been traced using pulsed field gradient NMR. Due to different vapor pressures, the two molecular species explore different spaces occupied by the capillary-condensed (accessible for both species) and gaseous (accessible only for the molecules of the main sorptive) phases. Comparative analysis of the diffusion properties obtained at different states along the adsorption isotherm revealed further insight into peculiarities of the fluid distribution and mass transfer of binary fluids in pores.

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Adsorption and desorption of a wetting fluid in Vycor studied by acoustic and optical techniques

Cited by 82 publications

References 19 publications

In situ small-angle neutron scattering study of nitrogen adsorption and condensation in mesoporous silica glass CPG-10-75

In situ small-angle neutron scattering study of nitrogen adsorption and condensation in mesoporous silica glass CPG-10-75

Adsorption-induced deformation of nanoporous materials—A review

Diffusion and phase equilibria of binary fluids in mesopores

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