Lotus Leaf-Inspired Breathable Membrane with Structured Microbeads and Nanofibers

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26 Scopus Citations
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Author(s)

  • Yifan Si
  • Yuanzhang Jiang
  • Yang Ming
  • Kin-tak Lau
  • Bin Fei

Detail(s)

Original languageEnglish
Pages (from-to)39610–39621
Journal / PublicationACS Applied Materials and Interfaces
Volume14
Issue number34
Online published18 Aug 2022
Publication statusPublished - 31 Aug 2022

Abstract

Electrospinning is a feasible technology to fabricate nanomaterials. However, the preparation of nanomaterials with controllable structures of microbeads and fine nanofibers is still a challenge, which hinders widespread applications of electrospun products. Herein, inspired by the micro/nanostructures of lotus leaves, we constructed a structured electrospun membrane with excellent comprehensive properties. First, micro/nanostructures of membranes with adjustable microbeads and nanofibers were fabricated on a large scale and quantitatively analyzed based on the controlling preparation, and their performances were systematically evaluated. The deformation of diverse polymeric solution droplets in the electrospinning process under varying electric fields was then simulated by molecular dynamic simulation. Finally, novel fibrous membranes with structured sublayers and controllable morphologies were designed, prepared, and compared. The achieved structured membranes demonstrate a high water vapor transmission rate (WVTR) > 17.5 kg/(m2 day), a good air permeability (AP) > 5 mL/s, a high water contact angle (WCA) up to 151°, and a high hydrostatic pressure of 623 mbar. The disclosed science and technology in this article can provide a feasible method to not only adjust micro/nanostructure fibers but also to design secondary multilayer structures. This research is believed to assist in promoting the diversified development of advanced fibrous membranes and intelligent protection.

Research Area(s)

  • lotus leaf, controllable electrospinning, biomimetic, waterproof breathable, fibrous membrane, CONTACT-ANGLE HYSTERESIS, ROBUST, SURFACE