Mechanochemical durability and self-cleaning performance of zinc oxide-epoxy superhydrophobic coating prepared via a facile one-step approach

Yap, Suk Wy; Johari, Norhasnidawani; Mazlan, Saiful Amri; Hassan, Noor Azlina

doi:10.1016/j.ceramint.2021.02.156

Cited by 34 publications

(11 citation statements)

References 36 publications

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“…Wang et al proposed multiscale pocket microstructures, achieving excellent stability. Zinc oxide (ZnO) is an important nanomaterial that is always a concern of researchers for its wettability. , Yap et al prepared layered rough structures with superhydrophobicity by depositing ZnO/epoxy solutions on substrates. Xu et al constructed ZnO/HNT superhydrophobic cotton fabrics with strong UV absorption properties.…”

Section: Introductionmentioning

confidence: 99%

Multiscale Microflower Structured Superhydrophobic Surface via Electrostatic Air Spray

Chen

Liu

2023

Langmuir

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Superhydrophobic surfaces with microstructures and multifunctionality have attracted intense research interest. Herein, a multiscale microflower structured surface (MMSS) was successfully fabricated by electrostatic air spray. To systematically study the preparation process, the influences of different electrostatic voltages, solution ratios, soaking time, spray distances, and spray time on surface morphology and hydrophobicity were analyzed. The surface has good superhydrophobic properties with a water contact angle of 162.3°, which allows the surface to be selfcleaning and antifouling. The surface hydrophobicity can be maintained after various mechanical and chemical damages. To overcome the limitation that existing droplet manipulation relies on special materials and surfaces, a new and universal droplet transport method is presented to successfully perform nondestructive droplet manipulations, which relies on external forces and droplet deformation to drive droplets. Therefore, this paper represents a different approach from previous studies of superhydrophobic surfaces and provides a new way to achieve dynamic droplet manipulations. These results indicate that the multifunctional MMSS will be widely used in industrial droplet transportation and self-cleaning applications.

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Section: Introductionmentioning

confidence: 99%

Multiscale Microflower Structured Superhydrophobic Surface via Electrostatic Air Spray

Chen

Liu

2023

Langmuir

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“…A comparison of surface modification conditions used for the nanocomposites useful for self‐cleaning from literature with that of the present study is given in Table S2. One can note that the surface modification conditions, used in the present study, are simple, faster, and economical [32,56–58,84–89] …”

Section: Resultsmentioning

confidence: 90%

“…One can note that the surface modification conditions, used in the present study, are simple, faster, and economical. [32,[56][57][58][84][85][86][87][88][89]…”

Section: Self-cleaning Testmentioning

confidence: 99%

Surface Modification of NiO‐Al₂O₃ Nanocomposites using Stearic Acid as a Modifier and their Applications in Self‐cleaning and Removal of Dyes

Narwal,

Jeevanandam

2024

ChemistrySelect

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In the present study, a quick surface modification method has been developed for the modification NiO‐Al2O3 nanocomposites using stearic acid (SA). The surface modification of NiO‐Al2O3 nanocomposites with stearic acid was confirmed by various analytical techniques (FT‐IR spectroscopy, thermal gravimetry (TG), carbon and hydrogen (CH) and XPS). There is no change in XRD patterns, and FE‐SEM and TEM images of NiO‐Al2O3 nanocomposites after modification with SA. FT‐IR analysis of SA modified NiO‐Al2O3 nanocomposites shows characteristic IR bands of carboxylate group. TG and CH analyses also confirm the presence of SA in the NiO‐Al2O3 nanocomposites. XPS analysis of SA modified NiO‐Al2O3 nanocomposites shows the presence of carbon atoms of stearic acid. The SA modified NiO‐Al2O3 nanocomposites show water contact angle greater than 90° which suggests their hydrophobic nature. The SA modified NiO‐Al2O3 nanocomposites were explored for self‐cleaning and also as adsorbent for the removal of crystal violet and rhodamine B dyes from aqueous solutions. The SA modified NiO‐Al2O3 nanocomposites remove the dyes within 30 minutes. The effect of various adsorption parameters (adsorbent dosage, contact time, pH, and temperature) was investigated to understand the optimum adsorption conditions. The SA modified NiO‐Al2O3 nanocomposites show better self‐cleaning property as compared to unmodified NiO‐Al2O3 nanocomposites.

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“…After the coating was cooled to room temperature, the WCA changes of samples were measured. 40 Water Absorption Test. The water absorption test of mortar was performed according to the Standard for test method of basic properties of construction mortar (JGJT 70-2009).…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…The superhydrophobic mortar specimens were placed at different temperatures (100, 125, 150, 175, and 200 °C) for 2 h to test the stability of the coating at high temperature. After the coating was cooled to room temperature, the WCA changes of samples were measured …”

Section: Methodsmentioning

confidence: 99%

Preparation of a Stable Superhydrophobic Mortar Surface Using a One-Step Method

Han,

Liu,

Xia

et al. 2023

Langmuir

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Research efforts have intensified on developing superhydrophobic surfaces on concrete structures to limit the damage caused by the natural porosity and hydrophilicity of cementitious materials. However, the feasibility idea is impeded by the complex preparation process and weak adhesion/stability performance. Therefore, superhydrophobic coatings were rapidly prepared on mortar surfaces by a straightforward and effective one-step method using zinc oxide (ZnO) modified with stearic acid and epoxy resin. The microstructure, physical/chemical properties, hydrophobic properties, and stability of the coatings were systematically investigated. The experimental results showed that the water contact angle of the samples reached a maximum value of 164.2° and a sliding angle of 4.6° when the stearic acid content was 0.5 g. The water absorption of the coated superhydrophobic mortar was reduced by approximately 61% compared to that of ordinary mortar, and neither particulate pollutants nor liquid pollutants could contaminate the superhydrophobic mortar. The coating maintained a superhydrophobic state and exhibited good physical durability after sandpaper abrasion, tape peeling, and high-temperature resistance tests. The water cluster diffusion coefficient on surface of the ordinary coating was 0.1645 × 10–4 and 0.0328 × 10–4 cm2/s on surface of the modified coating after molecular dynamics simulation.

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Mechanochemical durability and self-cleaning performance of zinc oxide-epoxy superhydrophobic coating prepared via a facile one-step approach

Cited by 34 publications

References 36 publications

Multiscale Microflower Structured Superhydrophobic Surface via Electrostatic Air Spray

Multiscale Microflower Structured Superhydrophobic Surface via Electrostatic Air Spray

Surface Modification of NiO‐Al₂O₃ Nanocomposites using Stearic Acid as a Modifier and their Applications in Self‐cleaning and Removal of Dyes

Preparation of a Stable Superhydrophobic Mortar Surface Using a One-Step Method

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Mechanochemical durability and self-cleaning performance of zinc oxide-epoxy superhydrophobic coating prepared via a facile one-step approach

Cited by 34 publications

References 36 publications

Multiscale Microflower Structured Superhydrophobic Surface via Electrostatic Air Spray

Multiscale Microflower Structured Superhydrophobic Surface via Electrostatic Air Spray

Surface Modification of NiO‐Al2O3 Nanocomposites using Stearic Acid as a Modifier and their Applications in Self‐cleaning and Removal of Dyes

Preparation of a Stable Superhydrophobic Mortar Surface Using a One-Step Method

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Surface Modification of NiO‐Al₂O₃ Nanocomposites using Stearic Acid as a Modifier and their Applications in Self‐cleaning and Removal of Dyes