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Well-defined porous membranes for robust omniphobic surfaces via microfluidic emulsion templating
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Well-defined porous membranes for robust omniphobic surfaces via microfluidic emulsion templating
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Journal Article
Well-defined porous membranes for robust omniphobic surfaces via microfluidic emulsion templating
2017
Overview
Durability is a long-standing challenge in designing liquid-repellent surfaces. A high-performance omniphobic surface must robustly repel liquids, while maintaining mechanical/chemical stability. However, liquid repellency and mechanical durability are generally mutually exclusive properties for many omniphobic surfaces—improving one performance inevitably results in decreased performance in another. Here we report well-defined porous membranes for durable omniphobic surfaces inspired by the springtail cuticle. The omniphobicity is shown via an amphiphilic material micro-textured with re-entrant surface morphology; the mechanical durability arises from the interconnected microstructures. The innovative fabrication method—termed microfluidic emulsion templating—is facile, cost-effective, scalable and can precisely engineer the structural topographies. The robust omniphobic surface is expected to open up new avenues for diverse applications due to its mechanical and chemical robustness, transparency, reversible Cassie–Wenzel transition, transferability, flexibility and stretchability.
Designing mechanically and chemically robust liquid-repellent surfaces remains a longstanding challenge. Here, Wang and colleagues report a microfluidic emulsion templating strategy to fabricate bioinspired omniphobic porous membranes with remarkable durability.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
