Tailoring Surface Hydrophilicity of Porous Electrospun Nanofibers to Enhance Capillary and Push鈥揚ull Effects for Moisture Wicking

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• 作者：Yuliang Dong ; Junhua Kong ; Si Lei Phua ; Chenyang Zhao ; Noreen L. Thomas ; Xuehong Lu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：August 27, 2014
• 年：2014
• 卷：6
• 期：16
• 页码：14087-14095
• 全文大小：720K
• ISSN：1944-8252

文摘

In this article, liquid moisture transport behaviors of dual-layer electrospun nanofibrous mats are reported for the first time. The dual-layer mats consist of a thick layer of hydrophilic polyacrylonitrile (PAN) nanofibers with a thin layer of hydrophobic polystyrene (PS) nanofibers with and without interpenetrating nanopores, respectively. The mats are coated with polydopamine (PDOPA) to different extents to tailor the water wettability of the PS layer. It is found that with a large quantity of nanochannels, the porous PS nanofibers exhibit a stronger capillary effect than the solid PS nanofibers. The capillary motion in the porous PS nanofibers can be further enhanced by slight surface modification with PDOPA while retaining the large hydrophobicity difference between the two layers, inducing a strong push鈥損ull effect to transport water from the PS to the PAN layer.

Keywords:

moisture transport; porous nanofibers; electrospinning; capillary motion; push鈭抪ull; wetting