Polymer Self‐Etching for Superhydrophobicity through a Green Hot‐Pressing‐Exfoliation Process: Low and High Adhesion

Xiong, Zhong; Zheng, Chenglin; Xia, Yanzhi

doi:10.1002/mame.201500465

Cited by 6 publications

(2 citation statements)

References 31 publications

(54 reference statements)

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“…Additionally, the surface C/O ratio increased from 1.61 of the pristine string to 2.32 of the treated string, which was attributed to long alkyl chains of grafted HDTMS. For treated strings, low-surface-energy alkyl chains combining with micro/nanoroughness on fiber surfaces benefit the improvement of fiber hydrophobicity [24,25].…”

Section: Resultsmentioning

confidence: 99%

Adjustable Underwater Gas Transportation Using Bioinspired Superhydrophobic Elastic String

Sun

Liu

et al. 2022

Coatings

Self Cite

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Dynamic and precise manipulation of the gas flow in a liquid environment through a facile and reliable approach is of great importance for directional gas transportation and multiphase chemical reactions. In this research, elastic superhydrophobic strings were prepared by a one-step, non-fluorinated dip-coating strategy. The surface-treatment string demonstrated a good superaerophilicity underwater. By simply elongating or shortening superaerophilic strings, the gas flux underwater was precisely manipulated in a gas-siphon underwater experiment. The result reveals that a large strain of the treated string induces a low gas flow, and a rope woven with more strings results in a larger range of gas flow regulation. The elastic superhydrophobic/superaerophilic string was utilized to adjust the reaction time of carbon dioxide and sodium hydroxide aqueous solution successfully. Furthermore, in a wet oxidation experiment for treating simulated flue gas composed of nitric oxide (NO), nitrogen and oxygen, superhydrophobic and stretched strings with a strain of 200% demonstrated a 7.9% higher NO removal efficiency than that of untreated strings. Interestingly, NO removal efficiency can be regulated by mechanical stretching of gas-conducting strings. We believe that this facile and low-cost approach provides a valid method of on-demand manipulation of the gas flow for underwater gas transportation.

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Section: Resultsmentioning

confidence: 99%

Adjustable Underwater Gas Transportation Using Bioinspired Superhydrophobic Elastic String

Sun

Liu

et al. 2022

Coatings

Self Cite

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“…Superhydrophobic coatings have been extensively researched and applied in self-cleaning, oil/water separation, anti-condensation, anti-fogging, and anti-icing [ 17 , 18 , 19 , 20 , 21 , 22 ]. Inspired by the lotus leaf effect, numerous studies have shown that superhydrophobicity can be obtained by the combination of micro/nano scale surface roughness and a low-surface-energy coating [ 23 , 24 ]. To endow the fabric with superhydrophobic property, it is usually designed hierarchical roughness on a material possessing low surface energy, or modified a rough surface with a low-surface-energy material [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Superhydrophobic and Flame-Retardant Coatings on Cotton Fabrics

Xiong

et al. 2022

Polymers

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The hydrophilicity and inherent flammability of cotton textiles severely limit their usage. To solve these drawbacks, a superhydrophobic and flame-retardant (SFR) coating made of chitosan (CH), ammonium polyphosphate (APP), and TiO2-SiO2-HMDS composite was applied to cotton fabric using simple layer-by-layer assembly and dip-coating procedures. First, the fabric was alternately immersed in CH and APP water dispersions, and then immersed in TiO2-SiO2-HMDS composite to form a CH/APP@TiO2-SiO2-HMDS coating on the cotton fabric surface. SEM, EDS, and FTIR were used to analyze the surface morphology, element composition, and functional groups of the cotton fabric, respectively. Vertical burning tests, microscale combustion calorimeter tests, and thermogravimetric analyses were used to evaluate the flammability, combustion behavior, thermal degradation characteristics, and flame-retardant mechanism of this system. When compared to the pristine cotton sample, the deposition of CH and APP enhanced the flame retardancy, residual char, heat release rate, and total heat release of the cotton textiles. The superhydrophobic test results showed that the maximal contact angle of SFR cotton fabric was 153.7°, and possessed excellent superhydrophobicity. Meanwhile, the superhydrophobicity is not lost after 10 laundering cycles or 50 friction cycles. In addition, the UPF value of CH/APP@TiO2-SiO2-HMDS cotton was 825.81, demonstrating excellent UV-shielding properties. Such a durable SFR fabric with a facile fabrication process exhibits potential applications for both oil/water separation and flame retardancy.

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Pressure‐Stable Air‐Retaining Nanostructured Surfaces Inspired by Natural Air Plastrons

Vüllers

Germain

Petit

et al. 2018

Adv Materials Inter

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Inspired by the pressure‐stable air layers retained by surfaces of aquatic insects, a technique is introduced to support the air–water interface on submerged superhydrophobic surfaces by pressurizing the retained air layer. This pressurization increases retained air layer stability against elevated and fluctuating hydrostatic pressures. Based on the movement of the air–water interface during wetting transition on superhydrophobic nano‐ and microhaired nanofur surface, the correlation between material surface energy, topography, and air layer stability is studied. By perforating nanofur, precise control over the air pressure in the underwater retained air layer is gained and the stability of the air–water interface against hydrostatic pressure is improved by several orders of magnitude compared to unsupported artificial superhydrophobic surfaces. 86% of the retained air layer on pressure‐supported perforated nanofur is intact up to 4 bar hydrostatic pressure, which corresponds to a water depth of 40 m. Furthermore, the influence of perforation parameters, such as number and distribution of pores on the stability of the retained air layer, is investigated. Finally, the stability of the air–water interface against fluctuations in water pressure up to an additional pressure of 3 bar is demonstrated by introducing a buffer air pressure in the retained air layer.

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Polymer Self‐Etching for Superhydrophobicity through a Green Hot‐Pressing‐Exfoliation Process: Low and High Adhesion

Cited by 6 publications

References 31 publications

Adjustable Underwater Gas Transportation Using Bioinspired Superhydrophobic Elastic String

Adjustable Underwater Gas Transportation Using Bioinspired Superhydrophobic Elastic String

Facile Fabrication of Superhydrophobic and Flame-Retardant Coatings on Cotton Fabrics

Pressure‐Stable Air‐Retaining Nanostructured Surfaces Inspired by Natural Air Plastrons

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