Diffusion induced phase separation with crystallizable nylons: II. Relation to final membrane morphology

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

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Abstract

Intermediate stages during membrane formation by means of immersion precipitation were studied by cryo-substitution for the system nylon 4,6, formic acid and water. The presence, nature and size of solid particles was determined as a function of time and of the distance from the interface. The spherulitic nature of these particles was confirmed by staining the samples. It was shown that at a relatively low nucleation density the concentration profile in the film was hardly influenced by a starting phase separation process, while in a situation with a relatively high number of nuclei per volume concentration patterns must be considerable altered.
Original languageEnglish
Pages (from-to)51-58
Number of pages8
JournalJournal of membrane science
Volume121
Issue number1
DOIs
Publication statusPublished - 1996

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