Mussel-inspired chemistry for preparation of superhydrophobic surfaces on porous substrates

Wang, Kaili; Dong, Youming; Yan, Yutao; Zhang, Shifeng; Li, Jianzhang

doi:10.1039/c7ra04790h

Cited by 38 publications

(21 citation statements)

References 39 publications

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“…9 To recreate the water repellency and self-cleaning properties of the "Lotus leaf", successful attempts have been made in order to alter the surface's wettability on metals. 10,11 These were achieved using three different methods: rstly, using chemical coatings that lower the surface free energy by applying chemical composites, 12 such as uoroalkylsilane. 13 Secondly, modifying surfaces by adjusting the roughness to micro and nanoscale.…”

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confidence: 99%

Influence of ambient conditions on the evolution of wettability properties of an IR-, ns-laser textured aluminium alloy

et al. 2017

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aMicro cell structures of different sizes were patterned using a nanosecond near-infrared laser source on Al2024 aluminium alloy plates with 2 mm thickness. The influence of laser parameters on the shape and size of the produced patterns were studied together with the evolution of wettability properties over time for different storage conditions. Samples were found to be superhydrophobic from a single step laser patterning, requiring no further treatment. Exposure to ambient air was shown to be a key factor in the property changes of the samples over time. The produced surface patterns with different laser parameter settings were correlated with the contact angle measurements, revealing a great influence of the amount of recast material on the hydrophobic properties. X-Ray photoelectron spectroscopy was used to study the impact of surface chemistry changes on hydrophobicity, analysis of elemental composition proved that chemisorbed organic molecules present in the ambient air were responsible for the hydrophilic to superhydrophobic transition.

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confidence: 99%

Influence of ambient conditions on the evolution of wettability properties of an IR-, ns-laser textured aluminium alloy

et al. 2017

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“…As shown in Figure 5 a, LC composite and LC/GC/MWCNT composite displayed two main peaks at 285.1 eV and 533.2 eV corresponded to the C1s and O1s, respectively [ 43 ]. In the case of LC/GC/MWCNT composite, an additional peak was observed at 399.1 eV corresponded to the N1s [ 44 ], indicating that the nitrogen-containing chitosan was attached to the lignocellulose fiber surface. Figure 5 b,c show the C1s spectrum of LC composite and LC/GC/MWCNT composite, respectively.…”

Section: Resultsmentioning

confidence: 99%

Lignocellulose-Chitosan-Multiwalled Carbon Nanotube Composites with Improved Mechanical Strength, Dimensional Stability and Fire Retardancy

et al. 2018

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A novel composite composed of lignocellulose (LC), glutaraldehyde crosslinked chitosan (GC) and multiwalled carbon nanotube (MWCNT) was fabricated by the hot-pressing process. The effect of the additional GC and MWCNT on the mechanical strength, dimensional stability and fire retardancy of lignocellulose composites was investigated. The results showed that LC/GC/MWCNT composite exhibited the maximum modulus of rupture (MOR) of 35.3 MPa, modulus of elasticity (MOE) of 2789.1 MPa and internal bonding (IB) strength of 1.2 MPa. Meanwhile, the LC/GC/MWCNT composite displayed improved dimensional stability with a thickness swelling (TS) value of 22.4%. Besides, the LC/GC/MWCNT composite exhibited improved fire retardancy with a limiting oxygen index of 29.0%. The peak heat release rate, the total heat release, the total smoke production and the maximum smoke production ratio of LC/GC/MWCNT composite decreased by 15.9%, 10.7%, 45.5% and 20.7% compared with those of LC composite, respectively. Therefore, the LC/GC/MWCNT composite may be a promising candidate for green wood based composites.

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“…Polymers such as polyvinyl alcohol (PVA), epoxy resins, or polydopamine are often chosen as adhesives in order to strengthen the interfacial interaction between the nanoparticles and the substrate. − PVA is a polyhydroxy substance with poor mechanical properties and excellent and inexpensive adhesive properties; however, PVA composites demonstrate good mechanical strength. Polydimethylsiloxane (PDMS) is a reagent commonly used in the fabrication of superhydrophobic surfaces with low variation with temperature, low surface tension, high transparency, good weather resistance, and high hydrophobicity.…”

Section: Introductionmentioning

confidence: 99%

UV-Assisted Multiscale Superhydrophobic Wood Resisting Surface Contamination and Failure

Yang

Zhao

et al. 2021

ACS Omega

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In the modern forestry, the demand for renewable and environmentally friendly wood protection is increasing. This paper reports a green method for preparing stable and self-cleaning superhydrophobic coating for wood protection by dripping polyvinyl alcohol cross-linked hollow silica nanoparticles on the surface of wood in combination with polydimethylsiloxane modification. The coating is based on a laminated structure with layers stacked on the surface of the wood and cured quickly with the assistance of UV. The coatings obtained on wood substrates with appropriate ratios have excellent superhydrophobic properties, with an optimum water contact angle of up to 160.4 ± 0.2°. The coating also exhibits good transparency in the UV–visible spectrum and a maximum transmittance of 91%. With transmission electron microscopy, the microscopic morphology of the self-assembled hollow silica nanoparticles was observed. Scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction were also applied to investigate the morphology and chemical composition of the coatings. A water contact angle of 151.5 ± 0.7° was maintained even after the abrasion tests with sandpaper at a distance of 300 cm. Meanwhile, the resultant coatings exhibit good self-cleaning properties apart from mechanical durability and chemical stability, which enables effective resistance to contamination. Evidenced by the abovementioned data, this composite coating is capable of optimizing the surface wettability of wood, offering a new dimension to the extensive and prolonged application of wood and wood-based products. Furthermore, considering the advantages of this method, it could also be used in other areas in the future, such as glass, solar substrates, and optical devices.

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Mussel-inspired chemistry for preparation of superhydrophobic surfaces on porous substrates

Cited by 38 publications

References 39 publications

Influence of ambient conditions on the evolution of wettability properties of an IR-, ns-laser textured aluminium alloy

Influence of ambient conditions on the evolution of wettability properties of an IR-, ns-laser textured aluminium alloy

Lignocellulose-Chitosan-Multiwalled Carbon Nanotube Composites with Improved Mechanical Strength, Dimensional Stability and Fire Retardancy

UV-Assisted Multiscale Superhydrophobic Wood Resisting Surface Contamination and Failure

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