Diffusion induced phase separation with crystallizable nylons. I. Mass transfer processes for nylon 4,6

A.M.W. Bulte, A.M.W. Bulte, M.H.V. Mulder, C.A. Smolders, C.A. Smolders, H. Strathmann

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Abstract

Mass transfer during membrane formation by means of phase inversion for a polymeric system with both a solid-liquid and a liquid-liquid equilibrium was studied on the basis of the theory developed by Reuvers and Smolders. During the first moments of immersion in the coagulation bath, the concentrations at the interface between bath and film are governed by the virtual liquid-liquid equilibrium. This equilibrium no longer exists at a larger time scale. The interfacial concentrations as a result of the local liquid-liquid equilibrium during mass transfer are located deeply in the crystallization region or solid-liquid demixing area and after an induction time the solid-liquid phase separation (crystallization) takes place when membranes are formed with an initial polymer concentration of 20% or larger. The calculated initial concentration profiles show a shallow pattern in polymer content for the films with initial concentration of 20 and 25%. From the calculated initial concentration profiles an isotropic morphology in the final membrane can beexpected. A steep increase of the polymer concentration at the interface was observed for the more concentrated filmscorrelated with a skinned morphology in the final membrane.
Original languageUndefined
Pages (from-to)37-50
Number of pages14
JournalJournal of membrane science
Volume1996
Issue number121
DOIs
Publication statusPublished - 1996

Keywords

  • IR-11521
  • METIS-106204

Cite this

Bulte, A. M. W., Bulte, A. M. W., Mulder, M. H. V., Smolders, C. A., Smolders, C. A., & Strathmann, H. (1996). Diffusion induced phase separation with crystallizable nylons. I. Mass transfer processes for nylon 4,6. Journal of membrane science, 1996(121), 37-50. https://doi.org/10.1016/0376-7388(96)00163-9
Bulte, A.M.W. ; Bulte, A.M.W. ; Mulder, M.H.V. ; Smolders, C.A. ; Smolders, C.A. ; Strathmann, H. / Diffusion induced phase separation with crystallizable nylons. I. Mass transfer processes for nylon 4,6. In: Journal of membrane science. 1996 ; Vol. 1996, No. 121. pp. 37-50.
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title = "Diffusion induced phase separation with crystallizable nylons. I. Mass transfer processes for nylon 4,6",
abstract = "Mass transfer during membrane formation by means of phase inversion for a polymeric system with both a solid-liquid and a liquid-liquid equilibrium was studied on the basis of the theory developed by Reuvers and Smolders. During the first moments of immersion in the coagulation bath, the concentrations at the interface between bath and film are governed by the virtual liquid-liquid equilibrium. This equilibrium no longer exists at a larger time scale. The interfacial concentrations as a result of the local liquid-liquid equilibrium during mass transfer are located deeply in the crystallization region or solid-liquid demixing area and after an induction time the solid-liquid phase separation (crystallization) takes place when membranes are formed with an initial polymer concentration of 20{\%} or larger. The calculated initial concentration profiles show a shallow pattern in polymer content for the films with initial concentration of 20 and 25{\%}. From the calculated initial concentration profiles an isotropic morphology in the final membrane can beexpected. A steep increase of the polymer concentration at the interface was observed for the more concentrated filmscorrelated with a skinned morphology in the final membrane.",
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author = "A.M.W. Bulte and A.M.W. Bulte and M.H.V. Mulder and C.A. Smolders and C.A. Smolders and H. Strathmann",
year = "1996",
doi = "10.1016/0376-7388(96)00163-9",
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volume = "1996",
pages = "37--50",
journal = "Journal of membrane science",
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Bulte, AMW, Bulte, AMW, Mulder, MHV, Smolders, CA, Smolders, CA & Strathmann, H 1996, 'Diffusion induced phase separation with crystallizable nylons. I. Mass transfer processes for nylon 4,6' Journal of membrane science, vol. 1996, no. 121, pp. 37-50. https://doi.org/10.1016/0376-7388(96)00163-9

Diffusion induced phase separation with crystallizable nylons. I. Mass transfer processes for nylon 4,6. / Bulte, A.M.W.; Bulte, A.M.W.; Mulder, M.H.V.; Smolders, C.A.; Smolders, C.A.; Strathmann, H.

In: Journal of membrane science, Vol. 1996, No. 121, 1996, p. 37-50.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Diffusion induced phase separation with crystallizable nylons. I. Mass transfer processes for nylon 4,6

AU - Bulte, A.M.W.

AU - Bulte, A.M.W.

AU - Mulder, M.H.V.

AU - Smolders, C.A.

AU - Smolders, C.A.

AU - Strathmann, H.

PY - 1996

Y1 - 1996

N2 - Mass transfer during membrane formation by means of phase inversion for a polymeric system with both a solid-liquid and a liquid-liquid equilibrium was studied on the basis of the theory developed by Reuvers and Smolders. During the first moments of immersion in the coagulation bath, the concentrations at the interface between bath and film are governed by the virtual liquid-liquid equilibrium. This equilibrium no longer exists at a larger time scale. The interfacial concentrations as a result of the local liquid-liquid equilibrium during mass transfer are located deeply in the crystallization region or solid-liquid demixing area and after an induction time the solid-liquid phase separation (crystallization) takes place when membranes are formed with an initial polymer concentration of 20% or larger. The calculated initial concentration profiles show a shallow pattern in polymer content for the films with initial concentration of 20 and 25%. From the calculated initial concentration profiles an isotropic morphology in the final membrane can beexpected. A steep increase of the polymer concentration at the interface was observed for the more concentrated filmscorrelated with a skinned morphology in the final membrane.

AB - Mass transfer during membrane formation by means of phase inversion for a polymeric system with both a solid-liquid and a liquid-liquid equilibrium was studied on the basis of the theory developed by Reuvers and Smolders. During the first moments of immersion in the coagulation bath, the concentrations at the interface between bath and film are governed by the virtual liquid-liquid equilibrium. This equilibrium no longer exists at a larger time scale. The interfacial concentrations as a result of the local liquid-liquid equilibrium during mass transfer are located deeply in the crystallization region or solid-liquid demixing area and after an induction time the solid-liquid phase separation (crystallization) takes place when membranes are formed with an initial polymer concentration of 20% or larger. The calculated initial concentration profiles show a shallow pattern in polymer content for the films with initial concentration of 20 and 25%. From the calculated initial concentration profiles an isotropic morphology in the final membrane can beexpected. A steep increase of the polymer concentration at the interface was observed for the more concentrated filmscorrelated with a skinned morphology in the final membrane.

KW - IR-11521

KW - METIS-106204

U2 - 10.1016/0376-7388(96)00163-9

DO - 10.1016/0376-7388(96)00163-9

M3 - Article

VL - 1996

SP - 37

EP - 50

JO - Journal of membrane science

JF - Journal of membrane science

SN - 0376-7388

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ER -