Simple spray deposition of a water-based superhydrophobic coating with high stability for flexible applications

Ye, Hui; Zhou, Liqun; Li, Weiping; Liu, Huicong; Chen, Haining

doi:10.1039/c7ta02118f

Cited by 119 publications

(72 citation statements)

References 46 publications

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“…Details of the experiments are given in a previously reported article. [20b] In short, E. coli was inoculated in 10 mL of Luria−Bertani broth (Himedia) and kept overnight in an air bath shaker at 37 °C and 300 rpm to reach the exponential growth phase. Later, the bacterial solution was centrifuged at 3000 rpm for 5 min to remove the used media and washed twice with sterile saline.…”

Section: Methodsmentioning

confidence: 99%

“…Though use of polymers, cellulosic materials, clays, and oxide nanoparticles is well known in this context, in most of the cases, organic solvents are used as a component of the reaction medium, which pose concerns related to safety, environmental pollution, operational cost, and solvent compatibility of the substrates. In this context, a few reports on the development of aqueous coating materials for water repelling surfaces are known . Recently, a nonfluorinated silane‐based coating material having tunable wetting property has been synthesised in a highly acidic condition .…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of a Waterborne Durable Superhydrophobic Material Functioning in Air and under Oil

Baidya

Das

Ras

et al. 2018

Adv Materials Inter

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A fundamental challenge in artificially structured/ chemically modified superhydrophobic surfaces is their poor chemical, mechanical, and structural robustness toward different mechanical abrasions. This limits their application potential in different fields of science and technology. Herein, a waterborne superhydrophobic material composed of clay particles is developed through a one‐pot chemical modification in ambient conditions, forming durable micro‐nano dual‐structured coatings over a range of substrates, without adhesive. This chemical modification inverts the inherent hydrophilic nature of clay particles and provides an excellent superhydrophobic surface having a water contact angle >170° (±2°) and contact angle hysteresis <5° (±2°). The coating shows excellent durability against various induced damages and works efficiently both in air and within oils. The observed property is due to the controlled surface energy obtained by the incorporated chemical functionalities and enhanced surface roughness facilitated by the hydrophobic effect during slow evaporation of water from the coating material. Being a stable water dispersion, it enables large area coatings, thereby minimizing safety and environmental concerns. Use of this material to develop rugged waterproof‐paper for paper‐based technologies is also demonstrated. As clay is commercially available and economical, it is believed, this scalable organic‐solvent‐free superhydrophobic material will have a positive impact on various industries.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication of a Waterborne Durable Superhydrophobic Material Functioning in Air and under Oil

Baidya

Das

Ras

et al. 2018

Adv Materials Inter

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“…[2,3] Recently, research and development efforts have been intensified toward fabricating robust and functional nonwetting surfaces and coatings using sustainable means and materials, due to the environmental issues associated with potential toxicity or bioaccumulation hazards of some of the materials or solvents used. [8,9] In this concept, natural or synthetic waxes along with some edible fatty acids have been proved very promising since they can be processed in certain innovative ways to fabricate superhydrophobic surfaces or coatings today. [8,9] In this concept, natural or synthetic waxes along with some edible fatty acids have been proved very promising since they can be processed in certain innovative ways to fabricate superhydrophobic surfaces or coatings today.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Coatings from Beeswax‐in‐Water Emulsions with Latent Heat Storage Capability

Naderizadeh

Heredia‐Guerrero

Caputo

et al. 2019

Adv Materials Inter

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Beeswax particles are homogenously emulsified in commercial aqueous polymer dispersion, without additional dispersing agents and surfactants. Emulsions display very good stability with wax droplet size distribution around 350 nm. The wax to polymer ratio in the emulsions can be tuned without compromising emulsion stability. The emulsions are spray coated in order to create either hydrophobic or superhydrophobic coatings. For superhydrophobicity, silica nanoparticles are dispersed in the emulsions at different concentrations. Beeswax‐rich coatings such as the ones with 1:1 beeswax:polymer ratio or more, including the superhydrophobic ones, demonstrate promising latent heat storage characteristics, suitable for thermal management applications. Electron microscopy studies show that as a result of emulsification, the polymer encapsulates the wax droplets/particles as a nanothin shell, preventing a major problem related to low melting point phase change materials referred to as leaching. Hence, the coatings can be heated well above the melting point of beeswax (≈62 °C) and can still demonstrate effective heat storage during the cooling stage. This water‐based coating process using ecofriendly material constituents can easily be scaled up and used in responsive coating applications, ranging from electronics to interior or exterior structural buildings requiring efficient energy management and thermal energy savings.

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“…And acrylic resin coating has exceptional chemical stability and excellent resistance to aging and durability, which is widely used in industry and daily life . However, very few acrylic resin‐based SHSs have been reported currently . In this work, the nano‐TiO 2 was modified with hexadecyltrimethoxysilane (HDTMS) and then composited with acrylic resin to obtain SHS for the first time.…”

Section: Introductionmentioning

confidence: 99%

Facile preparation of TiO₂/acrylic resin superhydrophobic surface with excellent wear resistance

Cao

Xie

et al. 2019

J of Applied Polymer Sci

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Superhydrophobic surfaces (SHSs) are widely applied in national defense, industrial, and agricultural production and daily life due to their unique structural characteristics and self-cleaning properties. In this work, a multilayer structure was obtained on an aluminum substrate using a simple spray method. The acrylic resin was used as a substrate, and the SHS was prepared by combining the acrylic resin with the modified nano-TiO 2 . The effects of different contents of surface modifier hexadecyltrimethoxysilane (cetyltrimethoxysilane), different spraying times, and different nanometer TiO 2 particle sizes on SHS were studied. The results showed that the optimal modifier content was 16%. When the spraying time is 1 min and the mass ratio of 10-nm TiO 2 to 100-nm TiO 2 is 1:1, the contact angle (CA) of the surface is 170.89 , and the sliding angle is 2 . Furthermore, the stability of the SHS under different acid-base conditions, the stability in NaCl solution (3.5 wt %), and the dry friction resistance were further determined. The experimental results show that the prepared samples have certain acid resistance, NaCl resistance, and alkali resistance. After 100 times of dry friction, the CA is still 162.30 , which suggests that the TiO 2 /acrylic resin SHS has excellent dry friction resistance performance.

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Simple spray deposition of a water-based superhydrophobic coating with high stability for flexible applications

Abstract: A highly stable water-based superhydrophobic coating was developed by a simple spraying technique using a low-cost and readily available non-fluorinated material system.

Cited by 119 publications

References 46 publications

Fabrication of a Waterborne Durable Superhydrophobic Material Functioning in Air and under Oil

Fabrication of a Waterborne Durable Superhydrophobic Material Functioning in Air and under Oil

Superhydrophobic Coatings from Beeswax‐in‐Water Emulsions with Latent Heat Storage Capability

Facile preparation of TiO₂/acrylic resin superhydrophobic surface with excellent wear resistance

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Simple spray deposition of a water-based superhydrophobic coating with high stability for flexible applications

Abstract: A highly stable water-based superhydrophobic coating was developed by a simple spraying technique using a low-cost and readily available non-fluorinated material system.

Cited by 119 publications

References 46 publications

Fabrication of a Waterborne Durable Superhydrophobic Material Functioning in Air and under Oil

Fabrication of a Waterborne Durable Superhydrophobic Material Functioning in Air and under Oil

Superhydrophobic Coatings from Beeswax‐in‐Water Emulsions with Latent Heat Storage Capability

Facile preparation of TiO2/acrylic resin superhydrophobic surface with excellent wear resistance

Contact Info

Product

Resources

About

Facile preparation of TiO₂/acrylic resin superhydrophobic surface with excellent wear resistance