A Facile Method to Prepare Double-Layer Isoporous Hollow Fiber Membrane by In Situ Hydrogen Bond Formation in the Spinning Line

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• 作者：Nazia Noor ; Joachim Koll ; Maryam Radjabian ; Clarissa Abetz and Volker Abetz
• 关键词：co-extrusion ; elemental mapping ; in situ hydrogen bond formation ; double-layer hollow fiber ; sulfonation
• 刊名：Macromolecular Rapid Communications
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：37
• 期：5
• 页码：414-419
• 全文大小：2123K
• ISSN：1521-3927

文摘

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.