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One-step Electrospinning Membranes with Gradual-transition Wettability Gradient for Directional Fluid Transport by Quan Shen; Yue Jiang; Shanzhu Guo; Lin Huang; Haibo Xie; Long Li is a Engineering article available to read on EtoBox.

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Gradual-transition wettability gradient is a highly promising wettability profile for driving fluid directionally transport across the thickness of porous membranes. However, the fabrication of such membranes is still challenging, limiting their further application in various fields. Here, we report a one-step strategy to fabricate membranes with gradual-transition wettability gradient (GMs) by programmed in-line-blending electrospinning polymers (poly (ε-caprolactone) (PCL) and poly (ε-caprolactone-co-ethylene glycol) (PCE)) with compatible segments but obviously different wettabilities. The results demonstrate that two opposite gradual-transition wettability gradients across the thickness are successfully fabricated in GMs, and resulting GMs exhibit excellent directional liquid transport property that can only allow liquid drops and continuous flow to permeate across the thickness in the direction from the lyophobicity-rich side to the lyophilicity-rich side while blocking the permeation process in the reverse direction. Additionally, no matter under high or low gravity conditions, the directional fluid transport flux of membranes with different wettability profiles improves as t

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Author

Quan Shen; Yue Jiang; Shanzhu Guo; Lin Huang; Haibo Xie; Long Li

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Engineering (Physical Sciences)