A superrobust superhydrophobic PSU composite coating with self-cleaning properties, wear resistance and corrosion resistance

Wang, Huaiyuan; Zhang, Xiguang; Liu, Zhanjian; Zhu, Yaxian; Wu, Shiqi; Zhu, Yanji

doi:10.1039/c5ra22396b

Cited by 21 publications

(6 citation statements)

References 38 publications

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“…The decomposition products acted as delivery materials to assist in the reaction between PDMS and the target surface by forming a gaseous phase with PDMS. PDMS subsequently reacted with the functional groups (e.g., hydroxyl groups) on the surface of the substrate and formed robust chemical bonds. , The mechanism of the reaction between PDMS and the surface functional groups can be elucidated by hydrolysis and PDMS grafting by condensation. Silanol groups are formed upon hydrolysis of PDMS, and these groups condense with surface functional groups to form a covalently bonded and robust hydrophobic layer on the surface. , The successful formation of PDMS coating on the sample surface was confirmed using X-ray photoelectron spectroscopy (XPS) analysis, where the spectrum of the coated surface exhibited a Si 2p peak at approximately 102.5 eV (Figure b) .…”

Section: Resultsmentioning

confidence: 99%

“…PDMS subsequently reacted with the functional groups (e.g., hydroxyl groups) on the surface of the substrate and formed robust chemical bonds. 28,29 The mechanism of the reaction between PDMS and the surface functional groups can be elucidated by hydrolysis and PDMS grafting by condensation. Silanol groups are formed upon hydrolysis of PDMS, and these groups condense with surface functional groups to form a covalently bonded and robust hydrophobic layer on the surface.…”

Section: → + +mentioning

confidence: 99%

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One-Step Eco-Friendly Superhydrophobic Coating Method Using Polydimethylsiloxane and Ammonium Bicarbonate

Kim

Lee

Hwang

2020

ACS Appl. Mater. Interfaces

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Superhydrophobic surfaces offer numerous advantages and have become popular in a wide range of fields. Although many approaches for the modification of surface wettability have been developed, the practical application of superhydrophobic surfaces has been limited by the need for toxic materials and specialized equipment. Herein, a one-step coating method is developed for the fabrication of a superhydrophobic surface to eliminate these limitations. This environmentally friendly coating process uses only two reagents, namely, polydimethylsiloxane and ammonium bicarbonate, to minimize the inconvenience and costs associated with the disposal of used toxic materials. The superhydrophobic surface exhibits excellent durability, and the method is applicable to a variety of target surface shapes, including three-dimensional and complex structures. Besides, a wettability patterned surface and a functional filter for oil/water separation can be fabricated using this method. The numerous advantages of this approach demonstrate great practical application potential of these superhydrophobic surfaces.

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Section: Resultsmentioning

confidence: 99%

Section: → + +mentioning

confidence: 99%

One-Step Eco-Friendly Superhydrophobic Coating Method Using Polydimethylsiloxane and Ammonium Bicarbonate

Kim

Lee

Hwang

2020

ACS Appl. Mater. Interfaces

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“…Simultaneously, the prepared superhydrophobic coating also exhibited good corrosion resistance properties, since corrosion current density and corrosion potential decreased from 100.9 to 103.6 mA/cm 2 and from 803 to 218 mV, respectively. The authors claim that the proposed fabrication scheme can enable large-scale fabrication and; therefore, such coatings can be adapted by the industry [92].…”

Section: Spray Coatingsmentioning

confidence: 99%

“…Reproduced with permission from [91]. (iii) Schematic representation of the preparation method of superhydrophobic polysulfone/polyvinylidene/montmorillonite/polydimethylsiloxane (PSU/PVDF/MMT-PDMS) composite coatings, as described by Wang et al Reproduced with permission from [92].…”

Section: Spray Coatingsmentioning

confidence: 99%

A Review of Fabrication Methods, Properties and Applications of Superhydrophobic Metals

et al. 2021

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Hydrophobicity and superhydrophobicity with self-cleaning properties are well-known characteristics of several natural surfaces, such as the leaves of the sacred lotus plant (Nelumbo nucifera). To achieve a superhydrophobic state, micro- and nanometer scale topography should be realized on a low surface energy material, or a low surface energy coating should be deposited on top of the micro-nano topography if the material is inherently hydrophilic. Tailoring the surface chemistry and topography to control the wetting properties between extreme wetting states enables a palette of functionalities, such as self-cleaning, antifogging, anti-biofouling etc. A variety of surface topographies have been realized in polymers, ceramics, and metals. Metallic surfaces are particularly important in several engineering applications (e.g., naval, aircrafts, buildings, automobile) and their transformation to superhydrophobic can provide additional functionalities, such as corrosion protection, drag reduction, and anti-icing properties. This review paper focuses on the recent advances on superhydrophobic metals and alloys which can be applicable in real life applications and aims to provide an overview of the most promising methods to achieve sustainable superhydrophobicity.

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“…Therefore, superhydrophobic composite materials can dramatically improve the waterproo ng performance of mobile phones as water droplets do not easily penetrate the surface. Nevertheless, the practical applications of superhydrophobic composite materials are limited because of the poor durability caused by the surface microstructure [17][18][19][20]. In addition, the rough surface geometry induces scattering of the incident light, thereby reducing clarity and making it di cult to apply to optical components such as the touch screen of a phone [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Thermally Stable, Semi-transparent Superhydrophobic Nanocomposites with Excellent Mechanical Strengths

Lim

Park

Kim

et al. 2022

Preprint

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With the development of smart electronic devices, the importance of surface-protective coatings is rapidly increasing. Superhydrophobic nanocomposite materials are promising protective coatings that exhibit potential for anti-wetting, self-cleaning, and antibacterial applications. However, their poor mechanical durability makes their practical application difficult. Additionally, rough surface geometries induce incident light scattering, thereby reducing the transparency and limiting their optical applications. This study describes semi-transparent superhydrophobic nanocomposites coatings with improved mechanical strength and thermal stability obtained through simple spray coating. We mixed reactive polydimethylsiloxane (PDMS) as a binder with low surface free energy and high thermal resistance with fluorinated silica nanoparticles. PDMS polymers were functionalized to improve their hydrophobicity and adhesion properties through hydrosilylation with acrylate monomers. As a result, our superhydrophobic coatings had a high-water repellency of above 160° and transparency of approximately 60% at a wavelength of 550 nm. The coated surfaces exhibited an outstanding pencil hardness of 5H and sufficient clarity to identify objects through them. After heat treatment at 400°C, the hardness increased to 6H while maintaining superhydrophobicity. Additionally, various contaminants were easily removed with water spraying. Our semi-transparent superhydrophobic nanocomposite materials can be widely applied in hard coatings for mobile displays, solar cell panels, self-cleaning paint, and outdoor facilities.

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A superrobust superhydrophobic PSU composite coating with self-cleaning properties, wear resistance and corrosion resistance

Abstract: In this study, a superhydrophobic polysulfone (PSU) composite coating with a high water contact angle (WCA) of 159° and a low slide angle (SA) of only 3.5° has been fabricated through a simple thermal spraying method.

Cited by 21 publications

References 38 publications

One-Step Eco-Friendly Superhydrophobic Coating Method Using Polydimethylsiloxane and Ammonium Bicarbonate

One-Step Eco-Friendly Superhydrophobic Coating Method Using Polydimethylsiloxane and Ammonium Bicarbonate

A Review of Fabrication Methods, Properties and Applications of Superhydrophobic Metals

Thermally Stable, Semi-transparent Superhydrophobic Nanocomposites with Excellent Mechanical Strengths

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