Functional surfaces with reversibly switchable wettability: Fundamentals, progresses, applications and challenges

Wang, Yubo; Sun, Yongyang; Xue, Yiqing; Sui, Xin; Yuan, Bo; Wang, Yinfeng; Liang, Wenyan

doi:10.1016/j.porgcoat.2023.108167

Cited by 9 publications

(1 citation statement)

References 166 publications

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“…The superhydrophobicity resulted from the combined function of the micro-rough structures fabricated by the laser and FAS with a low surface energy. 49–51 After laser etching again to remove the FAS, the superhydrophobicity was successfully transformed into superhydrophilicity. Underwater, the exterior surrounding superhydrophilic region showed superaerophobicity with an air contact angle of 162°, while the interior superhydrophobic region showed superaerophilicity with an air contact angle of 0° ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Drag reduction and antifouling of a spontaneous fast moving air film

Yan,

Lin,

Zhang

et al. 2024

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

Drag reduction and antifouling of a spontaneous fast moving air film

Yan,

Lin,

Zhang

et al. 2024

J. Mater. Chem. A

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Ex Situ pH‐Induced Reversible Wettability Switching for an Environmentally Robust and High‐Efficiency Stain‐Proof Coating

Li,

Wang,

Zhang

et al. 2024

Small Methods

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Developing superwetting coatings with environmental adaptability is critical for sustainable industrial applications. However, traditional anti‐wetting coatings often fall short due to their susceptibility to environmental factors (UV light, temperature, mold growth, and abrasion) and inadequate stain resistance in complex media. Herein, a durable ex situ pH‐responsive coating with reversible wettability switching, engineered by integrating hydrophobic polydimethylsiloxane and tertiary amine structures is presented. The resulting hierarchical micro‐nano surface structure, combined with a trapped air cushion, ensures low water adhesion and stable superhydrophobicity. Notably, after ex situ pH treatment, the modulation of surface N+ content synergistically interacts with polydimethylsiloxane chains, enabling a controlled transition in surface wettability from 150° to 68.5°, which can spontaneously revert to a hydrophobic state upon heating and drying. This transition enhances stain resistance in both air and underwater environments, resulting in a 17.2% increase in detergency compared to superhydrophobic controls. Moreover, the coating demonstrates remarkable durability, with no staining, peeling, or mildew growth (grade 0) even after 1500 h of UV radiation and 28 days of mildew resistance testing. This work offers a highly adaptable and stain‐resistant coating for applications in building and infrastructure protection, as well as in smart textiles designed for multi‐media decontamination.

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