Honeycomb-Inspired Robust Hygroscopic Nanofibrous Cellular Networks

Area of Science:

• Materials Science
• Biomimetics
• Nanotechnology

Background:

• Designing functional materials by mimicking nature is efficient but challenging.
• Creating robust, bioinspired 3D nanofibrous cellular networks with mechanical strength is difficult.

Purpose of the Study:

• To develop a biomimetic nanofibrous membrane (NFM) for efficient water harvesting.
• To create a material with a honeycomb-inspired gradient network structure exhibiting superior mechanical and hygroscopic properties.

Main Methods:

• Electrospinning of spider-silk-like humped nanofibers to form a 3D cellular network.
• Fabrication of a super-flexible, highly elastic, and tough nanofibrous membrane (NFM).
• Characterization of the NFM's mechanical properties and moisture absorption performance.

Main Results:

• The NFM demonstrated high tensile strength (2.9 MPa), elasticity, and toughness (3.39 MJ m⁻³).
• The hygroscopic NFM achieved a high equilibrium moisture absorption capacity (4.60 g g⁻¹) at 95% RH for 96 h.
• The NFM exhibited fast moisture absorption/transport rates, durability, and directional water droplet collection.

Conclusions:

• A novel NFM with a honeycomb-inspired gradient network structure was successfully fabricated.
• The biomimetic NFM shows significant potential for efficient water harvesting applications.
• This work provides a pathway for designing multifunctional NFMs.