Superhydrophobic self-similar nonwoven-titanate nanostructured materials

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:598

Article

Sharma, Sumit^1,2  Rawal, Amit¹  Toth, Ildiko Y.²  Vasarhelyi, Livia²  Kozma, Gabor²  Kukovecz, Akos²  Jee, Shyam³  Ayaydin, Ferhan³ 

[1] Indian Inst Technol Delhi, Dept Text & Fibre Engn, New Delhi, India

[2] Univ Szeged, Dept Appl & Environm Chem, Interdisciplinary Excellence Ctr, Rerrich Bela Ter 1, H-6720 Szeged, Hungary

[3] Biol Res Ctr, Cellular Imaging Lab, Temesvari Krt 62, H-6726 Szeged, Hungary

关键词: Asymmetric wettability;    Doubly re-entrant;    Nanowires;    Nonwovens;    Self-similar;    Superhydrophobicity;   

DOI  :  10.1016/j.jcis.2021.03.045

来源: Elsevier

【 摘 要 】

Hypothesis: Self-similarity is a scale-invariant irregularity that can assist in designing a robust superhydrophobic material. A combinatorial design strategy involving self-similarity and dual-length scale can be employed to create a new library of a doubly re-entrant, disordered, and porous network of superhydrophobic materials. Asymmetric wettability can be engineered in nonwoven materials by rendering them with superhydrophobic characteristics on one side. Experiments: A facile, scalable, and inexpensive spray-coating technique was used to decorate the weakly hydrophobic stearate-treated titanate nanowires (TiONWs) over the self-similar nonwoven material. Laser scanning confocal microscopy was employed to image the impalement dynamics in three dimensions. With the aid of X-ray microcomputed tomography analysis, the three-dimensional (3D) nonwoven structural parameters were obtained and analyzed. The underwater superhydrophobic behavior of the prepared samples was investigated. Findings: A classic 'lotus effect' has been successfully endowed in self-similar nonwoven-titanate nanostructured materials (SS-Ti-NMs) from a nonwoven material that housed the air pockets in bulk and water repellent TiONWs on the surface. The finer fiber-based SS-Ti-NMs exhibited lower roll-off angles and a thinner layer of water on its surface. An asymmetric wettability and the unusual display of underwater superhydrophobic behavior of SS-Ti-NMs have been uncovered. (c) 2021 Elsevier Inc. All rights reserved.

【 授权许可】

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