自修复型超疏水材料研究进展

doi:10.11896/cldb.18010216

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Abstract Superhydrophobic materials are defined as a kind of materials with water static contact angle of 150° or higher and sliding angle of less than 10°. The super hydrophobic properties of the materials are derived from two aspects.
On the one hand, it is difficult for water droplets to spread on the surface of the materials because of the existence of low-surface-energy substances. On the other hand, the rich hierarchical micro/nanostructures enable the formation of an“air cushion” between the solid and liquid phases, which further reduces the solid-liquid interface. Accordingly, the superhydrophobic materials are endowed with special functions like self-cleaning, anti-fouling, corrosion resistant, anti-icing, drag-reduction, anti-adhesion, oil/water separation, water directional collection, etc. Additionally, materials with anti-adhesion, oil-water separation, water collection can be also achieved based on superhydrophobic materials.
Unfortunately, superhydrophobic materials are highly susceptible to environmental hazards such as chemical etching, scratch and abrasion, resulting in loss of low-surface-energy components or destruction of hierarchical structures, eventually leads to the decline or loss of super water-repellency. To solve these problems, durable superhydrophobic materials are proposed, which can be achieved mainly by two approaches, one is to design superhydrophobic materials with high abrasive resistance, in purpose of minimizing friction or wear damage to chemical components or micro-nanoscale topography. The other is to construct self-healing superhydrophobic materials, for the sake of repairing the damage caused by friction and wear on the surface component or structure in time, and restoring the superhydrophobic property of the material. The former shows certain limitation in selection of wearproof materials because of the demand for introducing high wear-resistant material. more attentions have been paid on the latter owing to its university.
Generally, there are two approaches for fabrication of self-healing superhydrophobic materials. Specifically speaking, the first approach is constructing the superhydrophobic system capable of automatically complement the lost chemical composition by low-surface-energy substance. Concerning the absence of simple hydrophobic components timely supplement of surface components with low surface energy can realize the restoration of super-hydrophobicity by taking advantage of self-migration and rearrangement of this material on surface. For example, graft fluorinated groups to the bulk materials, take the micropores or microcapsules of the material as storage sites for low-surface-energy substances, etc. Anot-her approach to repair severely crushed microstructures and damaged surface chemistry involves design of superhydrophobic system capable of reconstructing hierarchical micro/nanostructures, such as introducing hydrophobic particles, preparing all-in-one coatings, imitating snakeskin-like shedding, utilizing shape memory polymer, etc.
In this review,we summarize the recent progress of self-healing superhydrophobic materials, elaborate the design idea, effect of hydrophobicity and self-healing mechanism of typical self-healing superhydrophobic systems. We also point out the challenges and prospects in self-healing superhydrophobic field, in order to provide references for fabrication of long-term superhydrophobic materials for widespread applications.

Key words： superhydrophobicity self-healing hierarchical micro/nanostructures low-surface-energy components

Published: 10 April 2019

CLC number:

O647.5

Fund:This work was financially supported by the National Natural Science Foundation of China(51503059)

About author:: Ying Zhou received her B.E. degree in Polymer materials from Hubei University in 2016. She is currently a post graduate in School of materials Science and Engineering, Hubei University under the supervision of Li Yao. Her research has focused on self-healing superhydrophobic materials.Li Yao received her m.S. degree in School of Chemistry and materials Science from Hubei University in 2007 and received her Ph.D degree in School of chemistry and Chemical Engineering from Sun Yat-sen University in 2011. After graduation, she served as a lecturer in School of materials Science and Engineering, Hubei University. Her research interests include self-healing polymer and superhydrophobic materials, etc.Zushun Xu received his m.S. degrees in Oganic Che-mistry from Hubei University in 1990, and received his Ph.D. degree in Polymer Chemistry and Physics from Zhejiang University in 1998. He worked as distinguished professor of Qinyuan Scholar in Hubei University and awarded for special allowance of the Hubei provincial government. His research interests include emulsion polymerization and polymer emulsion, functional polymer microspheres, heat-resistant polymers, biomedical materials, environmentally friendly coatings and adhesive, etc.

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Cite this article:

ZHOU Ying,XIAO Liji,YAO Li, et al. Research Progress in Self-healing Superhydrophobic Surfaces[J]. Materials Reports, 2019, 33(7): 1234-1242.

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http://www.mater-rep.com/EN/10.11896/cldb.18010216 OR http://www.mater-rep.com/EN/Y2019/V33/I7/1234

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