Multi-bioinspired and Multistructural Integrated Patterned Nanofibrous Surface for Spontaneous and Efficient Fog...

Area of Science:

• Materials Science
• Biomimetics
• Environmental Engineering

Background:

• Freshwater scarcity is a global challenge, necessitating sustainable water harvesting solutions.
• Fog harvesting offers a promising renewable water source, but efficient collector design remains a hurdle.
• Nature provides diverse microstructures and functionalities for water management, offering inspiration for technological advancements.

Purpose of the Study:

• To design and fabricate a multi-bioinspired fog collector mimicking natural structures for enhanced water collection.
• To investigate the synergistic effects of hydrophilic and hydrophobic surfaces in a patterned fog collector.
• To achieve spontaneous, efficient, and directional water collection from fog.

Main Methods:

• Inspired by the Namib desert beetle, honeycomb, and pitcher plant, a multi-bioinspired fog collector was designed.
• Hydrophilic nanofibrous bumps with a honeycomb-like structure were fabricated using electrospinning.
• A hydrophobic slippery substrate was integrated to facilitate water droplet transport.

Main Results:

• The patterned fog collector demonstrated a superior water-collecting efficiency of 1111 mg cm^-2 h^-1.
• Hydrophilic bumps increased the effective fog-collecting area, enhancing droplet nucleation.
• The hydrophobic substrate promoted rapid directional transport of water, minimizing evaporation.

Conclusions:

• The multi-bioinspired fog collector offers a highly efficient and sustainable method for water harvesting from fog.
• Combining hydrophilic and hydrophobic features in a patterned design is a viable strategy for optimizing fog collection.
• This research opens new avenues for developing advanced water collection technologies through bio-inspired design.