Modeling the stretching of microporous membranes

Morehouse, Jason A.; Lloyd, Douglas R.; Freeman, Benny D.; Lawler, Desmond F.; Liechti, Kenneth M.; Becker, Eric B.

doi:10.1016/j.memsci.2006.07.024

Cited by 17 publications

(6 citation statements)

References 41 publications

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“…Both macroscopic and microscopic dimensions of the membrane govern the mechanical strength of the membrane, and the inherent pore structure has inferior mechanical property compared with "solid" counterparts (matrix materials) [3,[9][10][11][12][13]. However, there is still a lack of knowledge of the relationship between three-dimensional structures of porous matrixes and their mechanical characteristics (i.e., macroscopic deformation and fracture strength of the entire fiber membrane).…”

Section: Introductionmentioning

confidence: 99%

Deformation modeling of polyvinylidenedifluoride (PVDF) symmetrical microfiltration hollow-fiber (HF) membrane

Iio

Yonezu

Yamamura

et al. 2016

Journal of Membrane Science

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a b s t r a c tThe tensile deformation behavior of polyvinylidenedifluoride (PVDF) symmetrical microfiltration hollowfiber (HF) membranes was studied. The membranes had submicron pores with a three-dimensional open-cell structure. The surface and cross section of the porous membranes were observed by FESEM (field emission scanning electron microscope) to investigate the microstructure of the cell, namely, its size and ligament geometry. During uniaxial tensile tests, the membranes underwent elastic deformation and plastic deformation. Large deformation induced pore growth along the tensile direction, resulting in an increase in water permeability. In order to establish a mechanical model for tensile deformation, the finite element method (FEM) was employed. In this model, the Kelvin polyhedron (truncated octahedron structure) was used to mimic a three-dimensional open-cell structure. A one-unit cell based on this structure was created, and a periodical boundary condition was employed for the FEM computation. The FEM model could reproduce the overall elastoplastic deformation behavior of the porous membrane and provide useful insight into the fabrication of porous membranes and reliable operation of water purification.

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Section: Introductionmentioning

confidence: 99%

Deformation modeling of polyvinylidenedifluoride (PVDF) symmetrical microfiltration hollow-fiber (HF) membrane

Iio

Yonezu

Yamamura

et al. 2016

Journal of Membrane Science

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“…The similar effect of increasing temperature was illustrated in Table A2. for CLCS membranes at 0.2mm distance; the increase of normalized concentration from 780 (C/S) to 800 (C/S) at 30 º C was followed by an increase to 840 (C/S) at 60 º C. This established the correlation between pore size increase and the increase in temperature (Morehouse et al 2006), where the increase in temperature increased the normalized concentration of the membranes due to increase in pore size with stretching the membranes.…”

Section: Effect Of Increasing Temperature On Barrier Properties Of Csmentioning

confidence: 60%

Chitosan Nanocomposite Mesoporous Membranes: Mechanical and Barrier Properties as a Function of Temperature

Fahim¹,

Mamdouh²,

Salem³

2015

JMSR

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This work investigates the influence of the type and wt.% of nanofillers on the tensile strength behaviour and barrier properties of fabricated chitosan (CS) mesoporous membranes and their nanocomposites using graphene (G) and fullerene (F) nanofillers. Non cross-linked chitosan (NCLCS) as well as cross-linked chitosan (CLCS) solutions with sodium tripolyphosphate (TPP) were both mixed with G and F nanofillers with different wt.%. NCLCS membranes displayed yield tensile strength of 24MPa while the CLCS membranes displayed a much lower yield tensile strength of 2.87MPa. The addition of G and F nanofiller enhanced the yield tensile strength of the CS membranes up to 45MPa. However, the increase in % elongation for CLCS membranes was 75% higher than that for NCLCS ones. Furthermore, the results revealed that there was a significant effect of the operating temperature on the membrane pore size, which decreased the tensile strength and the barrier of the produced membranes. The enhancement of the tensile properties of polymer nanocomposites membranes (PNC) membranes is crucial to avoid film fracture or delamination. Moreover, the addition of nanofillers improve the barrier properties of PNC membranes, thus the membranes are used in packaging and current filtration techniques. In this work, experimental as well as statistical analysis of the fabricated CS membranes and their yield tensile strength and % elongation data are presented. This study presents the effect of the filler type, the filler content and the cross-linking of CS membranes on tensile strength behaviour both experimentally as well as theoretically.

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“…Moreover, both types of concentration polarization, namely diluted (at the permeate side) and concentrated (at the feed side), should be considered [174]. Additionally, it should be noticed that in some works, the models of the membrane manufacturing processes [163,175,176] and the estimation of its properties [177,178] were developed.…”

Section: Microfiltration and Other Processesmentioning

confidence: 99%

Modern trends in the mathematical simulation of pressure-driven membrane processes

Huliienko

Korniienko

Gatilov³

2020

JES

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The presented article is an attempt to evaluate the progress in the development of the mathematical simulation of the pressure-driven membrane processes. It was considered more than 170 articles devoted to the simulation of reverse osmosis, nanofiltration, ultrafiltration, and microfiltration and the others published between 2000 and 2010 years. Besides the conventional approaches, which include the irreversible thermodynamics, diffusion and pore flow (and models which consider the membrane surface charge for nanofiltration process), the application of the methods the computational fluid dynamics, artificial neural networks, optimization, and economic analysis have been considered. The main trends in this field have been pointed out, and the areas of using approaches under consideration have been determined. The technological problems which have been solved using the mentioned approaches have also been considered. Although the question of the concentration polarization has not been considered separately, it was defined that, in many cases, the sufficiently accurate model cannot be designed without considering this phenomenon. The findings allow evaluating more thoroughly the development of the simulation of pressure-driven membrane processes. Moreover, the review allows choosing the strategy of the simulation of the considered processes. Keywords: membrane, simulation, model, reverse osmosis nanofiltration, ultrafiltration, microfiltration.

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Modeling the stretching of microporous membranes

Cited by 17 publications

References 41 publications

Deformation modeling of polyvinylidenedifluoride (PVDF) symmetrical microfiltration hollow-fiber (HF) membrane

Deformation modeling of polyvinylidenedifluoride (PVDF) symmetrical microfiltration hollow-fiber (HF) membrane

Chitosan Nanocomposite Mesoporous Membranes: Mechanical and Barrier Properties as a Function of Temperature

Modern trends in the mathematical simulation of pressure-driven membrane processes

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