Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 37, Issue 5, Pages 414-419Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201500593
Keywords
co-extrusion; elemental mapping; in situ hydrogen bond formation; double-layer hollow fiber; sulfonation
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A double-layer hollow fiber is fabricated where an isoporous surface of polystyrene-block poly(4-vinylpyridine) is fixed on a support layer by co-extrusion. Due to the sulfonation of the support layer material, delamination of the two layers is suppressed without increasing the number of subsequent processing steps for isoporous composite membrane formation. Electron microscope-energy-dispersive X-ray spectroscopy images unveil the existence of a high sulfur concentration in the interfacial region by which in-process H-bond formation between the layers is evidenced. For the very first time, our study reports a facile method to fabricate a sturdy isoporous double-layer hollow fiber.
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