Research on Hybrid Wettability Biomimetic Structures for Efficient Fog Water Harvesting

CAO Minqiang, CHENG Huiting, MA Yongqi, CHEN Qi, WANG Wenxin

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Plastics Science and Technology ›› 2025, Vol. 53 ›› Issue (03) : 7-12. DOI: 10.15925/j.cnki.issn1005-3360.2025.03.002
Theory and Research

Research on Hybrid Wettability Biomimetic Structures for Efficient Fog Water Harvesting

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Abstract

Fog water harvesting offers a way alleviate global freshwater shortages. In this study, the 3D printing mixed wettability biomimetic structure was inspired by the Namib desert beetle back structure. The substrates of 3D printing biomimetic Namib desert beetle structures were selectively surface-modified with hydrophobic nano-SiO2 suspensions to prepare mixed wettability biomimetic Namib desert beetle structures. Hydrophobic SiO2 nanoparticles with a diameter of about 15 nm were uniformly attached to the substrate surface of this biomimetic structure. The base is covered with an array of hydrophilic 3D protrusions, each with a diameter of approximately 1 mm. With the increase of hydrophobic nano-SiO2 content on the substrate surface of 3D printing mixed wettability biomimetic Namib desert beetle structure, the water contact angle of the substrate surface increased gradually, the wettability decreased gradually, and the water collection rate of the biomimetic structure increased gradually. The water collection rate of the 3D printing mixed wettability biomimetic Namib desert beetle structure could reach 0.943 g/(cm2·h), being about 2.5 times higher than that of the 3D printing flat sample. The results show that 3D raised structures and surface wettability gradients are beneficial to improve the fog water harvesting performance of 3D printing biomimetic Namib desert beetle structure.

Key words

Biomimetic structure / 3D printing / Mixed wettability / Fog water harvesting / Freshwater resources

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CAO Minqiang , CHENG Huiting , MA Yongqi , et al . Research on Hybrid Wettability Biomimetic Structures for Efficient Fog Water Harvesting. Plastics Science and Technology. 2025, 53(03): 7-12 https://doi.org/10.15925/j.cnki.issn1005-3360.2025.03.002

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