Abstract
Abstract Hollow core polyacrylonitrile (PAN) microfibers with nano- and microporosity are synthesized based on the regeneration of PAN from dimethyl sulfoxide in a hydrodynamic flow-focusing microfluidic device. This technique is a fast and one-step approach to fabricate such core–shell microfibers. The fiber size (20–45 µm) and the nanopore size (90–300 nm) are well controllable by simply changing core–sheath flow rate and PAN concentration.
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