A novel dissolution and resolidification method for preparing robust superhydrophobic polystyrene/silica composite

Wang, Peng; Sun, Bo; Yao, Takeshi; Chen, Mingji; Fan, Xiaoliang; Han, Huilong; Lin, Li-Rong; Wang, Chao

doi:10.1016/j.cej.2017.06.058

Cited by 56 publications

(23 citation statements)

References 42 publications

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“…As far as we know, it is rare for superhydrophobic coatings to withstand such a high pressure in the tape-peeling test. Compared with most of the reported superhydrophobic coatings, ,, the PU/SiO 2 @HD-POS coating showed superior stability against tape-peeling, which is comparable to the all-organic superhydrophobic coatings developed by Tiwari et al …”

Section: Results and Discussionmentioning

confidence: 66%

Totally Waterborne, Nonfluorinated, Mechanically Robust, and Self-Healing Superhydrophobic Coatings for Actual Anti-Icing

Zhao

et al. 2018

ACS Appl. Mater. Interfaces

205

128

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Bioinspired superhydrophobic coatings are of great interest in academic and industrial areas. However, their real-world applications are hindered by some main bottlenecks, especially the pollutive preparation methods (e.g., organic solvents and fluorinated compounds) and poor mechanical stability. Here, we report for the first time the totally waterborne, nonfluorinated, mechanically robust, and self-healing superhydrophobic coatings. The coatings were fabricated by spray-coating polyurethane (PU) aqueous solution and a hexadecyl polysiloxanemodified SiO 2 (SiO 2 @HD-POS) aqueous suspension onto substrates using PU as the adhesive. The SiO 2 @HD-POS suspension was synthesized by HCl-catalyzed reactions among hexadecyltrimethoxysilane, tetraethoxysilane, and SiO 2 nanoparticles. Besides high superhydrophobicity, the coatings exhibit exceptional mechanical stability against sandpaper abrasion for 200 cycles at 9.8 kPa and tape-peeling for 200 cycles at 90.5 kPa because of high durability and unique hierarchical macro-/nanostructure of the coating as well as solid lubrication of the SiO 2 @HD-POS nanoparticles fallen off from the coatings. The coatings also show fast and stable self-healing capability owing to migration of the healing agent (HD-POS) to the damaged surface. Moreover, the coatings exhibit good static and dynamic antiicing performance in outdoor environment (−15 °C, relative humidity = 54%). The superhydrophobic coatings may be used in various areas because the main bottlenecks have been successfully broken.

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Section: Results and Discussionmentioning

confidence: 66%

Totally Waterborne, Nonfluorinated, Mechanically Robust, and Self-Healing Superhydrophobic Coatings for Actual Anti-Icing

Zhao

et al. 2018

ACS Appl. Mater. Interfaces

205

128

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“… (C) WCA of the coatings after different abrasion cycles, where the inset shows that the image of the sandpaper abrasion test. (D) Comparison of abrasion resistance of Ep-FND-S coating with other superhydrophobic coatings reported in the references (a: Long et al., 2017 ; b: Ye et al., 2017 ; c: Zhou et al., 2017 ; d: Zhang et al., 2019 ; e: Peng et al., 2019 ; f: Zhou et al., 2019 ; g: Sun et al., 2019 ; h: Liu et al., 2017 ; i: Wang et al., 2017a , 2017b ; j: Guo et al., 2016 ; k: Guo et al., 2017 ; l: Huang et al., 2018 ). The scale bar is the standard deviation.…”

Section: Resultsmentioning

confidence: 99%

“…A sandpaper abrasion test was used to evaluate the mechanical durability of the coatings ( Wang et al., 2017a , 2017b ). Figure 3 C shows the WCA as a function of the number of abrasion cycles.…”

Section: Resultsmentioning

confidence: 99%

Tree root-inspired robust superhydrophobic coatings with high permeation for porous structures

et al. 2021

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Summary Superhydrophobic coatings have tremendous potential for protecting porous structures from corrosion. However, the weak adhesion and poor abrasion resistance have long been challenges for their real-life applications. Inspired by tree roots, we prepared a robust superhydrophobic coating by spraying fluorinated nanodiamonds (FNDs) on a permeable epoxy coating. The epoxy can not only coat the surface but also permeate deeply inside a porous substrate and consolidate in situ as tree roots in soil. Thus, the structure is thoroughly reinforced where the pull-off strength reaches 9.4 MPa for concrete. On the other hand, the surface is covered with immobilized FNDs, forming a superhydrophobic surface. Thanks to the ultra-hard FNDs, the coating surface has high abrasion resistance and its superhydrophobicity holds even after 100 abrasion cycles. Moreover, it exhibits self-cleaning, anti-icing, and anticorrosion performance. It is promising in protecting various porous structures such as concrete, wood, and untreated corroded steel.

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“…While rolling off water drops picked away dust particles present on the surface, this is called as self‐cleaning phenomenon. [ 24 ] The self‐cleaning performance of superhydrophobic coating was studied in different ways such as by impacting water jet [ 25 ] and rolling water drop [ 7 ] on contaminated surface, immersing in muddy water, [ 26 ] and pouring muddy water on it. [ 5 ] The muddy water was prepared by adding 5 g soil in 40 mL water.…”

Section: Resultsmentioning

confidence: 99%

Superhydrophobic Nanocomposite Coatings of Hydrophobic Silica NPs and Poly(methyl methacrylate) with Notable Self‐Cleaning Ability

Sutar

Gaikwad

Latthe

et al. 2020

Macromolecular Symposia

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The present paper describes a facile and inexpensive dip coating method for preparation of hierarchical superhydrophobic nanocomposite coating. The hydrophobic silica nanoparticles (NPs) are synthesized via sol–gel technique. The superhydrophobicity of the coating is controlled by adjusting the concentration of silica NPs in poly (methyl methacrylate) (PMMA). After optimization, the coating exhibited water contact angle of 165° and sliding angle of 4°. The surface morphology of the superhydrophobic coatings revealed hierarchical rough structure formed on the glass substrate, which enable air trapping. The prepared superhydrophobic coating showed wetting stability under water jet impact with notable self‐cleaning performance. The mechanical stability of the superhydrophobic coating is studied using sandpaper abrasion and adhesive tape peeling test. Such highly non‐wettable and self‐cleaning coatings have potential in various practical applications.

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A novel dissolution and resolidification method for preparing robust superhydrophobic polystyrene/silica composite

Cited by 56 publications

References 42 publications

Totally Waterborne, Nonfluorinated, Mechanically Robust, and Self-Healing Superhydrophobic Coatings for Actual Anti-Icing

Totally Waterborne, Nonfluorinated, Mechanically Robust, and Self-Healing Superhydrophobic Coatings for Actual Anti-Icing

Tree root-inspired robust superhydrophobic coatings with high permeation for porous structures

Superhydrophobic Nanocomposite Coatings of Hydrophobic Silica NPs and Poly(methyl methacrylate) with Notable Self‐Cleaning Ability

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