Development of novel superhydrophobic coatings using siloxane-modified epoxy nanocomposites

Elzaabalawy, Assem; Meguid, S. A.

doi:10.1016/j.cej.2020.125403

Cited by 109 publications

(49 citation statements)

References 51 publications

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“…In addition, the fabrication method used should be economical, scalable, and facile to ensure their widespread adoption in different applications and specially in healthcare facilities. We have demonstrated these qualities in our earlier work (Elzaabalawy et al 2019;Elzaabalawy and Meguid 2020) for general engineering applications. The focus here is on the development of durable protective surfaces that are self-cleaning, antibacterial, and antiviral.…”

Section: Objectivesmentioning

confidence: 69%

“…Epoxy has a higher surface energy and as a result superhydrophobic nanocomposites that use epoxy as the base material might experience reduced repellency. Based on our previous work (Elzaabalawy and Meguid 2020 ), an additional step can be introduced to overcome this reduction. Prior to dispersing the nanoparticles, the epoxy is chemically modified using an amino-functionalized polysiloxane.…”

Section: Combating Covid-19 Using Superhydrophobic Surfacesmentioning

confidence: 99%

“…A potential fabrication technique that can overcome these obstacles is developing superhydrophobic nanocomposites in which low surface energy nanoparticles are dispersed in a polymeric matrix. These nanocomposites can be applied to a surface to form a superhydrophobic coating (Yeerken et al 2019 ; Elzaabalawy et al 2019 ; Elzaabalawy and Meguid 2020 ) or bulk-synthesised to create a monolith that is entirely superhydrophobic (Elzaabalawy et al 2019 ; Zhang et al 2016 ). The choice of the nanocomposite’s constituent materials depends on the required surface characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, flexible polymers with low surface energy, such as PDMS (silicone) and PTFE (Teflon), can be used to coat or create flexible surfaces, while polymers with greater mechanical properties, such as epoxy, can be used to coat commonly accessible and frequently touched surfaces. As for nanoparticles, silica has demonstrated excellent self-cleaning characteristics (Yeerken et al 2019 ; Elzaabalawy et al 2019 ; Elzaabalawy and Meguid 2020 ; Zhang et al 2016 ) and remains to be a cost effective solution.…”

Section: Introductionmentioning

confidence: 99%

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Potential of combating transmission of COVID-19 using novel self-cleaning superhydrophobic surfaces: part I—protection strategies against fomites

Meguid

Elzaabalawy

2020

Int J Mech Mater Des

Self Cite

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According to the World Health Organisation, one of the main concerns of COVID-19 virus is its tenacity to spread from droplets that either land directly on a surface or are transmitted to a surface by an infected person. In this study, we report the potential of using superhydrophobic surfaces to combat the transmission and spread of fomites infected by COVID-19 virus strand. Fomites include clothes, utensils, furniture, regularly touched objects and personal protective equipment used by Health Care Workers to act as barriers against fluid transmission and/or fluid penetration. In this effort, we propose three strategies to combat the transmission and the spread of the virus: encapsulation, contamination suppression, and elimination. We believe that this can be achieved by the use of our recently developed superhydrophobic coating and regenerative monolith to encapsulate and suppress the virus. The newly developed superhydrophobic coating and monolith are scalable, economical, and facile with the monolith capable of regeneration. The elimination of the virus will be through the use of antiviral and antibacterial copper nanoparticles or dedicated copper surfaces.

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Section: Objectivesmentioning

confidence: 69%

Section: Combating Covid-19 Using Superhydrophobic Surfacesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Potential of combating transmission of COVID-19 using novel self-cleaning superhydrophobic surfaces: part I—protection strategies against fomites

Meguid

Elzaabalawy

2020

Int J Mech Mater Des

Self Cite

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“…The majority of data available in scientific literature are based on the application of functionalized linear polyhydrosiloxanes and polysiloxanes with only one functional group as agents that increase hydrophobic properties [44]. Moreover, unifunctionalized polysiloxanes have been introduced to epoxy resin-based composites, resulting in a material with improved performance [45]. Double-functionalized polysiloxanes are mostly utilized to modify fibers in the textile industry [46].…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic and Anti-Icing Behavior of UV-Laser-Treated Polyester Resin-Based Gelcoats

et al. 2020

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Ice accumulation on wind turbine blades due to the impact of supercooled water droplets can be reduced by the application of surfaces with anti-icing properties. Hydrophobic surfaces are considered as a promising solution because of their water repellent behavior. In recent years, short-pulsed laser technologies have been developed as an efficient technique to modify the surface properties of materials. However, the anti-icing properties of such surfaces have not yet been validated. In this work, a hybrid modification of polyester resin-based gelcoats was adopted. Laser patterning (LP) was used to produce periodic surface structures on modified unsaturated polyester resin (UPR) substrates. One of the innovations of this research is the utilization of novel purpose-made chemical modifiers for gelcoats. The implementation of linear polymethylhydrosiloxane (PMHS) as a building block is a key improvement in terms of durability and functionality of the coating, since there is an option of introducing not only groups bonding in the polyester into one molecule, but also groups that increase hydrophobicity. The other novelty is a successfully conducted experiment combining such chemical modification with laser texturization of the surface. The influence of the laser energy, pattern shape, and spatial periods on the topographical characteristics and hydrophobicity as well as the anti-icing properties of the produced surfaces were investigated. To characterize the surface topography of the produced structures, scanning electron microscopy (SEM) and profilometer were utilized. Measurements of the wettability parameters (static contact angle and contact angle hysteresis) on the treated surfaces allowed the identification of the influence of wetting behavior and laser parameters on the investigated materials. Anti-icing properties were characterized by ice adhesion (IA) and freezing delay time (FDT) tests. It was found that hybrid modification of unsaturated polyester resin by chemical modifiers and laser treatment increased the hydrophobic and anti-icing properties of polyester gelcoats.

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Facile Formation of Hierarchical Textures for Flexible, Translucent, and Durable Superhydrophobic Film

Dai¹,

Chen²,

Ding³

et al. 2020

Adv Funct Materials

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Flexible superhydrophobic surfaces have recently attracted extensive interest not only in the field of burgeoning flexible electronics, but also for the practicability toward various situations. Herein, a cost‐effective and environment‐friendly approach is demonstrated to realize the durable, flexible, and superhydrophobic film with optical transparency. Without sophisticated facilities, the essential hierarchical architecture to render a low‐adhesive surface is achieved via magnetic field‐assisted polydimethylsiloxane microcilia, followed with the swelling process to decorate nanoscaled particles with excellent robustness. This tight connection between the microcilia and decorated nanoparticles renders the mechanical robustness with resistance to ultrasonic treatment, sandpaper abrasion, and high‐speed water impact. The film further exhibits outstanding stabilities when exposed to organic contamination, hot water, and chemical corrosions. Water repellency is well preserved when the film is under various mechanical deformations including cyclic stretching, bending, and squeezing. For practical demonstrations, the film is applied as the protective film for touch screen owing to the intrinsic optical transmittance, or serves as the water‐proof covers for sorts of complex/curved surfaces. These stated features reveal the convincing potential of the methodology to be applied for the circumstances where simultaneous addressing of robustness, flexibility, and adaptability is highly appreciated.

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Development of novel superhydrophobic coatings using siloxane-modified epoxy nanocomposites

Cited by 109 publications

References 51 publications

Potential of combating transmission of COVID-19 using novel self-cleaning superhydrophobic surfaces: part I—protection strategies against fomites

Potential of combating transmission of COVID-19 using novel self-cleaning superhydrophobic surfaces: part I—protection strategies against fomites

Hydrophobic and Anti-Icing Behavior of UV-Laser-Treated Polyester Resin-Based Gelcoats

Facile Formation of Hierarchical Textures for Flexible, Translucent, and Durable Superhydrophobic Film

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