Comparison of hydrophobicity and durability of functionalized aluminium oxide nanoparticle coatings with magnetite nanoparticles–links between morphology and wettability

Hill, Donald; Barron, Andrew R.; Alexander, Shirin

doi:10.1016/j.jcis.2019.07.080

Cited by 34 publications

(24 citation statements)

References 35 publications

(70 reference statements)

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“…However, with further increase of the wt. (%) NPs, the wettability decreases and the EPNCs become hydrophobic, which is in accordance with the observation of Hill et al in 2019 [21]. From Figure 3, the major increase of about 53% compared with CS was observed for 3 wt.…”

Section: Contact Anglesupporting

confidence: 90%

“…In recent years, special attention has been paid to EPs filled with NPs. These nanofillers (e.g., silicon dioxide (SiO2) [12][13][14], titanium dioxide (TiO2) [15,16], aluminum oxide (Al2O3) [17][18][19]) are characterized by their specific shape and size (nanoscale), high surface areas, surface pretreatment, and the degree of dispersion into the EP matrix [1,2,4,20,21].…”

Section: Introductionmentioning

confidence: 99%

“…Both the physicochemical and topographical properties of surface materials are important for adhesion and coatings applications [29,30]. EP adhesives filled with NPs have also been recently investigated [20,21,[31][32]. It was found that the inclusion of NPs can improve the wetting behavior, surface roughness, wear resistance, and shear strength, which are important properties for the resulting epoxy resin nanocomposites (EPNCs) to be used as adhesives or coatings.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, wettability and roughness are strongly related. The wetting characteristics of surface materials using functionalized NPs depend strongly on the NP distribution within the surface layers [21]. The surface roughness of PCs can be analyzed by atomic force microscopy (AFM), which is a relatively new technique used for the surface characterization of polymers.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on the Surface Properties of Nanoalumina-Filled Epoxy Resin Nanocomposites

2020

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This article presents an experimental study on the surface properties of epoxy resin nanocomposites (EPNCs) manufactured with a thermosetting epoxy resin (EP)–bisphenol A diglycidyl ether (BADGE)–2-[[4-[2-[4-(Oxiran-2-ylmethoxy)phenyl]propan-2-yl]phenoxy]methyl]oxirane) and filled with alumina nanoparticles (NPs). The NPs consist of pretreated (with a silane agent) alpha alumina with irregular shapes and a 100 nm maximum size. Three weight fractions of NPs were studied: 1, 3, and 5 wt. (%). Two different epoxy (EP) resins were manufactured, one cured and postcured with bis (4-aminophenyl) methane (DDM); and another one cured with 3-dodec-2-enyloxolane-2,5-dione (DDSA) + 8-methyl-3a,4,7,7a-tetrahydro-4,7-methano-2-benzofuran-1,3-dione (MNA). The wettability and the surface roughness of the obtained EPNCs were studied through the measurement of contact angles and topographic images obtained with atomic force microscopy (AFM), respectively. Significant influence of both the loading of NPs and used curing agents was observed. EPNCs cured with DDM were shown to be hydrophobic for 0, 1, and 3 wt. (%) and hydrophilic for 5 wt. (%). Maximum surface roughness was observed for 5 wt. (%). EPNCs cured with DDSA+MNA were shown to be hydrophilic for 0 and 1 wt. (%) and hydrophobic for 3 and 5 wt. (%). The surface roughness decreased as the weight fraction of NPs increased until 3 wt. (%), and then increased for 5 wt. (%).

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Section: Contact Anglesupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental Study on the Surface Properties of Nanoalumina-Filled Epoxy Resin Nanocomposites

2020

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“…Consideration of the dynamic wetting and sliding angle data for the embedded nanoparticle film suggests that this surface exhibits petal-like wetting behaviour where the high adhesion is caused by water penetrating into grooves formed between the microstructures 34 . AFM imaging showed that the embedded nanoparticles displayed a root mean squared roughness similar to when the particles are deposited onto the plastic at room temperature 36 (222 nm versus 210 nm), which suggests that topographic variations that could affect this behaviour do not exist on the nanoscale. The AFM image of the embedded particles from which this measurement was performed is displayed in Fig.…”

Section: Wetting Behaviourmentioning

confidence: 96%

Controlling the wettability of plastic by thermally embedding coated aluminium oxide nanoparticles into the surface

Hill

Barron

Alexander

2020

Journal of Colloid and Interface Science

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Nanoparticle embedding into the surface of plastics provides an effective anchor that improves the durability of coatings formed from functionalized nanoparticles. Coatings formed from thermally embedded particles show superior wear resistance relative to coatings formed from non-embedded particles. As a consequence of this, embedded nanoparticles functionalized with hydrophilic and hydrophobic carboxylates are better suited for controlling the wettability of plastics than when the nanoparticles are deposited onto the plastic under ambient conditions. Experiments 2Carboxylate-functionalized Al2O3 nanoparticles were embedded into ethylene vinyl acetate through spray coating the particles onto the substrate during heating. Sonication was used to remove excess particles that did not become embedded into the material. Coatings formed from the embedded particles were characterized through scanning electron microscopy (SEM), atomic force microscopy (AFM), energy dispersive x-ray spectroscopy (EDX), and x-ray photoelectron spectroscopy (XPS).The wettability of the coatings was characterized using static and dynamic contact angle (CA) measurements to measure the apparent water contact angles, and sliding angle measurements, whilst the durability of the coatings was studied using scratch testing, tape peel tests, and abrasion tests.The build-up of fog on the substrates was also studied through exposing the surfaces to water vapour. FindingsThermal embedding of the particles into the surface of the plastic was observed to occur when the material was heated to temperatures around its melting temperature. AFM and SEM showed that plastic embedded with the nanoparticles possessed a morphology that was substantially rougher than the untreated plastic. CA measurements showed that plastic embedded with hydrophobic isostearate functionalized nanoparticles was highly hydrophobic and displayed a CA of approximately 152 o . Dynamic CA measurements and sliding angle measurements revealed that plastic embedded with the isostearate functionalized nanoparticles showed petal-like wetting behavior. Furthermore, it was observed that the CA of the plastic could be varied from highly hydrophobic to highly hydrophilic through embedding varying amounts of isostearate and hydrophilic 2-[2-(2methoxyethoxy)ethoxy]acetate functionalised Al2O3 nanoparticles into the surface of the material. Scratch testing showed that thermally embedding the nanoparticles into the plastic substantially improved their abrasion resistance, relative to when the nanoparticles are deposited onto the nonheated material. This methodology indicates that embedding nanoparticles into plastics creates 3 durable coatings that can display variable wettability. Consequently, this methodology could be useful in applications where it is desirable to keep plastics dry, such as for food packaging or medical devices.

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Superhydrophilic surface modification of fabric via coating with cysteic acid mineral oxide

Al-Shatty

Hill

Kiani

et al. 2022

Applied Surface Science

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Comparison of hydrophobicity and durability of functionalized aluminium oxide nanoparticle coatings with magnetite nanoparticles–links between morphology and wettability

Abstract: Comparison of hydrophobicity and durability of functionalized aluminium oxide nanoparticle coatings with magnetite nanoparticles-links between morphology and wettability,

Cited by 34 publications

References 35 publications

Experimental Study on the Surface Properties of Nanoalumina-Filled Epoxy Resin Nanocomposites

Experimental Study on the Surface Properties of Nanoalumina-Filled Epoxy Resin Nanocomposites

Controlling the wettability of plastic by thermally embedding coated aluminium oxide nanoparticles into the surface

Superhydrophilic surface modification of fabric via coating with cysteic acid mineral oxide

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