Robust superhydrophobic silicone/epoxy functional coating with excellent chemical stability and self-cleaning ability

Huang, Weidong; Jiang, Xiaoli; Zhang, Yagang; Tang, Zhiqiang; Sun, Zicai; Liu, Zhijun; Zhao, Lin; Liu, Yanxia

doi:10.1039/d3nr04062c

Cited by 4 publications

(3 citation statements)

References 67 publications

(100 reference statements)

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“…The organic solvent resistance of the Binder/ChNFs/Mosil coating could be ascribed to the stable chemical bonds of the silicon oxide chains in the Mosil layer. 36 As shown in Figure 7d, the Binder/ChNFs/Mosil coating maintained superhydrophobic with water contact angles above 150°and water sliding angles were about 13°until the pH increased to 10. The transmittance of a glass slide with the Binder/ChNFs/Mosil coating at 550 nm was 94.3% after immersion in the alkali solution with a pH of 12 for 30 min.…”

Section: ■ Results and Discussionmentioning

confidence: 79%

“…The data in Figure a–c showed that the decrease in transmittance of the specimens was not significant and the coating surface still remained superhydrophobic with a water contact angle larger than 150° and a sliding angle lower than 10° after immersing in n -hexane, ethanol, or even DMSO for 180 min. The organic solvent resistance of the Binder/ChNFs/Mosil coating could be ascribed to the stable chemical bonds of the silicon oxide chains in the Mosil layer . As shown in Figure d, the Binder/ChNFs/Mosil coating maintained superhydrophobic with water contact angles above 150° and water sliding angles were about 13° until the pH increased to 10.…”

Section: Resultsmentioning

confidence: 92%

“…In addition, there are electron-donating groups (metal ions, hydroxyl) in the Binder and electron-accepting groups (carboxylate) in ChNFs. Electrons transferred from the donor (the Binder layer) to the acceptor (the ChNF layer) form a double electric layer generating electromagnetic adsorption forces on both sides of the interface region . The Mosil layer composed of methylsilanized silica could be linked to ChNFs by covalent and hydrogen bonds due to the presence of hydroxyl groups on the methylsilanized silica.…”

Section: Resultsmentioning

confidence: 99%

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Antireflective Superhydrophobic and Robust Coating Based on Chitin Nanofibers and Methylsilanized Silica for Outdoor Applications

Zhang,

Xu,

et al. 2024

ACS Appl. Mater. Interfaces

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Antireflective coatings with superhydrophobicity have many outdoor applications, such as solar photovoltaic panels and windshields. In this study, we fabricated an omnidirectional antireflective and superhydrophobic coating with good mechanical robustness and environmental durability via the spin coating technique. The coating consisted of a layer of phytic acid (PA)/ polyacrylamide (PAM)/calcium ions (Ca 2+ ) (referred to as Binder), an antireflective layer composed of chitin nanofibers (ChNFs), and a hydrophobic layer composed of methylsilanized silica (referred to as Mosil). The transmittance of a glass slide with the Binder/ChNFs/Mosil coating had a 5.2% gain at a wavelength of 550 nm, and the antireflective coating showed a water contact angle as high as 160°and a water sliding angle of 8°. The mechanical robustness and environmental durability of the coating, including resistance to peeling, dynamic impact, chemical erosion, ultraviolet (UV) irradiation, and high temperature, were evaluated. The coating retained excellent antireflective capacity and self-cleaning performance in the harsh conditions. The increase in voltage per unit area of a solar panel with a Binder/ChNFs/Mosil coating reached 0.4 mV/cm 2 compared to the solar panel exposed to sunlight with an intensity of 54.3 × 10 3 lx. This work not only demonstrates that ChNFs can be used as raw materials to fabricate antireflective superhydrophobic coatings for outdoor applications but also provides a feasible and efficient approach to do so.

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Section: ■ Results and Discussionmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

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