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Bioinspired Nanofibril-Humped Fibers with Strong Capillary Channels for Fog Capture.

Yufang Liu1, Nan Yang1,2, Chunlei Gao1

  • 1Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University (BUAA), Beijing 100191, P. R. China.

ACS Applied Materials & Interfaces
|June 2, 2020
PubMed
Summary

Researchers developed bioinspired nanofibril-humped fibers (BNFs) for efficient fog capture. These fibers mimic spider silk, enhancing water collection through unique micro/nanostructures and capillary action.

Keywords:
bioinspired spider silkelectrospinning fiberfog droplets collectioninside transportationnanofibril-humped

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Area of Science:

  • Materials Science
  • Biomimetics
  • Nanotechnology

Background:

  • Spider silk exhibits unique micro/nanostructures that facilitate water collection.
  • Developing efficient fog harvesting materials is crucial for water-scarce regions.

Purpose of the Study:

  • To fabricate bioinspired nanofibril-humped fibers (BNFs) mimicking wetted spider silk.
  • To investigate the fog capture and water transport capabilities of BNFs.

Main Methods:

  • Fabrication of BNFs using thermoplastic polyester elastomer and chitosan via electrospinning and fluid coating.
  • Analysis of micro/nanostructures and water droplet transport mechanisms.
  • Investigation of BNF webs for large-scale fog capture.

Main Results:

  • BNFs exhibit periodic humps with interlaced random nanofibrils and joints of aligned nanofibrils.
  • Nanofibrils enhance fog droplet capture and directional water transport via capillary channels.
  • Efficient water collection is achieved through internal and external transport mechanisms.

Conclusions:

  • BNFs demonstrate high efficiency in fog capture and water collection.
  • The biomimetic design offers a promising approach for novel material development.
  • Potential applications include fog harvesting engineering and filtration systems.