Preparation of a Lotus-Leaf-Like Coating with Robust Super-Hydrophobicity and UV-Resistant Ability

Xiao, Yongtian; Yang, Qing; Shen, Xiaojuan; Zhu, Maiyong; Li, Songjun

doi:10.1007/s10904-022-02522-7

Cited by 4 publications

(1 citation statement)

References 28 publications

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“…One typical example is described in the poem "After the overnight rain on the leaves in the morning sun, the water drops are crystal clear, and the wind lifts each lotus leaf one by one. [12]" Water droplets cannot stay on the surface of lotus leaves, but instead roll off, taking away dust and impurities adhering to the surface, thereby achieving a self-cleaning effect [13][14][15]. This phenomenon is called the "lotus effect" or "self-cleaning effect" [16,17].…”

Section: Introductionmentioning

confidence: 99%

Construction of organic-inorganic hybrid coating polymer with in situ SiO2/PDMS on the surface of wood

Shen

Dong

Zheng

et al. 2023

Preprint

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Wood has a large number of hydrophilic groups and pore structures, with strong moisture and water absorption abilities, and is prone to problems such as deformation, cracking, and discoloration. In order to improve this phenomenon, surface modification of wood has always been a hot topic in wood science research. To address the problem of poor water resistance of wood, the organic-inorganic hybrid superhydrophobic layer was constructed bionically on wood substrate by dipping coating method or spraying method based on the principle of lotus leaf effect, using inorganic fillers such as nano-silica/organosilicone oil and transparent polymer of water-based acrylic varnish as organic matrix. In this study, monodisperse nanometer-sized SiO2 microspheres were prepared via the Stöber method and the wood surface was modified by self-assembly of a solution. Then, the prepared modified nanoparticles SiO2/PDMS mixture solution was alternately and cyclically coated on the surface of the wood to obtain SiO2/PDMS in situ organic-inorganic hybrid modified wood samples. The results showed that the porous structure of the white wax wood surface was fully covered by SiO2/PDMS in situ organic-inorganic hybrid coating polymer after coating, forming a dense protective layer. SiO2/PDMS in situ organic-inorganic hybrid modified wood samples not only did not change the original color and texture of the white wax wood material, but also had a contact angle greater than 150° for the surfaces of 7 common droplets (deionized water, tea, cola, juice, vinegar, ink, red wine), indicating that introducing a SiO2/PDMS organic-inorganic hybrid coating to modify the wood surface can endow the wood with good superhydrophobic properties. This is mainly because the hydroxyl groups in the SiO2/PDMS in situ organic-inorganic hybrid coating deposited on the wood surface are combined with the hydroxyl groups on the wood surface, reducing the number of hydroxyl groups on the surface. In addition, the presence of long-chain fluorinated polymers also increases the hydrophobicity of the wood surface.

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Section: Introductionmentioning

confidence: 99%

Construction of organic-inorganic hybrid coating polymer with in situ SiO2/PDMS on the surface of wood

Shen

Dong

Zheng

et al. 2023

Preprint

View full text Add to dashboard Cite

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Facile and fast construction of biomimetic, waterborne, and superhydrophobic coatings via spraying strategy

Tang,

Gao,

et al. 2024

Materials Today Communications

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Wood Surface-Embedding of Functional Monodisperse SiO₂ Microspheres for Achieving Robust, Durable, Nature-Inspired, Programmable Superrepellent Interfaces

Shen,

Zhang,

Huang

et al. 2024

Langmuir

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Nature-inspired, robust, durable, liquid-repellent interfaces have attracted considerable interest in the field of wood biomimetic intelligence science and technology application. However, realizing green environmental protection and low maintenance and replacement cost wood surfaces constructed with micro/nanoarchitectures is not an easy task. Aiming at the problem of poor waterproof performance of wood, a silicon dioxide/ polydimethylsiloxane (SiO 2 /PDMS) self-cleaning programmable superhydrophobic coating was biomimetically constructed on the wood substrate by surface-embedded dual-dipping design based on the "substrates + nanoparticles" hybrid principle of the lotus leaf effect. This robust, durable, nature-inspired, self-cleaning, programmable superhydrophobic coating was found to have no observable impact on the original color and texture of the natural wood. The SiO 2 /PDMS/wood prepared exhibited exceptional liquid repellency and a high static water contact angle (WCA) of 158.5°and a low slide angle (SA) of 10°, including everyday generalpurpose droplets, indicating that the introduction of the monodisperse SiO 2 microspheres can effectively enhance the superhydrophobic properties of the hydrophilic wood. We applied this strategy to a variety of substrates, including wood-cellulose aerogel and wood-cellulose paper, and demonstrated that the liquid-repellent nature of the self-cleaning superhydrophobic coating remained unchanged. Moreover, the superhydrophobic surface of SiO 2 /PDMS/wood was preserved even after harsh abrasion conditions, including mechanical damage (sandpaper, sharp steel blade, and tapes), thermal damage (UV irradiation and low/hightemperature exposure such as steaming and freezing), chemical damage, and solvent corrosion (immersion in acid, alkali), demonstrating robust stability of the superhydrophobic coating. Furthermore, the SiO 2 /PDMS programmable superhydrophobic coating exhibits exceptional exciting self-cleaning and stain-resistant properties, making it offer greater possibilities in terms of scientific challenges and real-world problem-solving at biomimetic smart superhydrophobic interfaces in wood.

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Preparation of a Lotus-Leaf-Like Coating with Robust Super-Hydrophobicity and UV-Resistant Ability

Cited by 4 publications

References 28 publications

Construction of organic-inorganic hybrid coating polymer with in situ SiO2/PDMS on the surface of wood

Construction of organic-inorganic hybrid coating polymer with in situ SiO2/PDMS on the surface of wood

Facile and fast construction of biomimetic, waterborne, and superhydrophobic coatings via spraying strategy

Wood Surface-Embedding of Functional Monodisperse SiO₂ Microspheres for Achieving Robust, Durable, Nature-Inspired, Programmable Superrepellent Interfaces

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Preparation of a Lotus-Leaf-Like Coating with Robust Super-Hydrophobicity and UV-Resistant Ability

Cited by 4 publications

References 28 publications

Construction of organic-inorganic hybrid coating polymer with in situ SiO2/PDMS on the surface of wood

Construction of organic-inorganic hybrid coating polymer with in situ SiO2/PDMS on the surface of wood

Facile and fast construction of biomimetic, waterborne, and superhydrophobic coatings via spraying strategy

Wood Surface-Embedding of Functional Monodisperse SiO2 Microspheres for Achieving Robust, Durable, Nature-Inspired, Programmable Superrepellent Interfaces

Contact Info

Product

Resources

About

Wood Surface-Embedding of Functional Monodisperse SiO₂ Microspheres for Achieving Robust, Durable, Nature-Inspired, Programmable Superrepellent Interfaces