Anti-scaling properties of a  SLIPS  material prepared by silicon oil infusion in porous polyaniline obtained by electropolymerization

Sousa, Maria F.B.; Barbosa, Gilberto; Signorelli, Filipe; Bertran, Celso Aparecido

doi:10.1016/j.surfcoat.2017.06.038

Cited by 30 publications

(16 citation statements)

References 26 publications

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“…Many previous studies investigating LIS and SLIPS for antiscaling and antifouling applications have shown promising performance in mainly quiescent conditions. , Motivated mainly by the concern of lubricant depletion for LIS and SLIPS, we develop our solid-state hybrid coating to have analogous functionality as LIS and SLIPS . The difference between the conducted experiments here with past studies is the experiment design.…”

Section: Resultsmentioning

confidence: 99%

Scalable Slippery Omniphobic Covalently Attached Liquid Coatings for Flow Fouling Reduction

Zhao

Khodakarami

Deshpande

et al. 2021

ACS Appl. Mater. Interfaces

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Fouling and accretion have negative impacts on a plethora of processes. To mitigate heterogeneous nucleation of a foulant, lowering the surface energy and reducing surface roughness are desired. Here, we develop a multilayer coating to mitigate solution-based heterogeneous fouling for internal flows. The first layer is a sol–gel silicon dioxide (SiO2) coating, which acts as a corrosion barrier, creates the surface chemistry needed for covalent bonding of the slippery omniphobic covalently attached liquid (SOCAL), and ensures an atomically smooth (<1 nm) interface. The second layer bonded to SiO2 is SOCAL, which further reduces the nucleation rate due to its low surface energy (<12 mJ/m2). The presence of a consistent sol–gel SiO2 base coating to bind to the SOCAL enables application to various metallic substrates. The coating is solid, making it more durable when compared to alternative slippery liquid-infused surfaces (LIS) that suffer from lubricant loss. To demonstrate performance and scalability, we apply our coating to the internal walls of aluminum (Al) tubing and test its fouling performance in a flow-fouling setup with single-phase flow of synthetic seawater. The seawater consists of saturated calcium sulfide (CaSO4), and fouling is characterized in both laminar and turbulent flow regimes (Reynolds numbers 1030 to 9300). Our coating demonstrated a reduction in salt scale fouling by 95% when compared to uncoated Al tubes. Furthermore, we show our coating to withstand turbulent flow conditions, mechanical abrasion loading, and corrosive environments for durations much longer than LIS. Our work demonstrates a coating methodology applicable to a variety of metal substrates and internal passages to achieve antifouling in single-phase flows.

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Section: Resultsmentioning

confidence: 99%

Scalable Slippery Omniphobic Covalently Attached Liquid Coatings for Flow Fouling Reduction

Zhao

Khodakarami

Deshpande

et al. 2021

ACS Appl. Mater. Interfaces

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“…On the other hand, many studies had successfully deposited polypyrrole (PPy), , polyaniline, , and a metal–organic framework (MOF) on the substrates which can impregnate lubricant to achieve various functions. In 2014, Aizenberg et al modified the structure of gold-coated surfaces to be applicable for the deposition of a nanostructured PPy overcoating on aluminum .…”

Section: Fabrication Of Bioinspired Scalphobic Surfacesmentioning

confidence: 99%

“…It could be concluded that the lubricant reduced the number of nucleation sites rather than inhibiting surface nucleation and also helped reduce the adhesion of solid particles onto the surface. Lastly, Sousa et al injected perfluorinated oil into interlaced wire-like structures prepared by electropolymerized polyaniline on stainless steel substrates and functionalized with 1 H ,1 H ,2 H ,2 H -perfluorodecanethiol . They pointed out that the oil layer could better fill the structure and form the outermost surface with a liquid film to protect the surfaces from the adhesion of the scale.…”

Section: Recent Advances Of Bioinspired Scalephobic Surfacesmentioning

confidence: 99%

Recent Progress of Bioinspired Scalephobic Surfaces with Specific Barrier Layers

2021

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Bioinspired superwettable surfaces have been widely harnessed in diverse applications such as self-cleaning, oil/water separation, and liquid transport. So far, only a little work is focused on scalephobic capability of those superwettable surfaces. However, the troublesome scale deposition will inevitably be observed in our daily production and life, greatly reducing heat transfer efficiency and inhibiting the liquid transport. To address this annoying problem, as the emerging strategy, specific barrier layers are introduced onto superwettable surfaces to reduce or even avoid the direct contact between scale and the surfaces. In this feature article, we first provide the basic concept of bioinspired scalephobic surfaces with specific barrier layers. Then, we briefly introduce the typical fabrication methods of scalephobic surfaces. Later, we summarize recent progress of bioinspired scalephobic surfaces with specific barrier layers. Furthermore, we point out the guiding theory and criteria for the stability of barrier layers. Finally, we put forward the forecast on the existing problems and future direction in bioinspired scalephobic surfaces.

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“…The liquid-infused porous surfaces can also be utilized for self-cleaning applications. A typical surface can be formed via the infusion of silicon oil on the porous electropolymerized polyaniline surface [18]. Care must be taken towards covering the textured porous surface with a uniform film thickness of silicon oil.…”

Section: Introductionmentioning

confidence: 99%

Sliding Water Droplet on Oil Impregnated Surface and Dust Particle Mitigation

et al. 2021

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Self-cleaning of surfaces becomes challenging for energy harvesting devices because of the requirements of high optical transmittance of device surfaces. Surface texturing towards hydrophobizing can improve the self-cleaning ability of surfaces, yet lowers the optical transmittance. Introducing optical matching fluid, such as silicon oil, over the hydrophobized surface improves the optical transmittance. However, self-cleaning ability, such as dust mitigation, of the oil-impregnated hydrophobic surfaces needs to be investigated. Hence, solution crystallization of the polycarbonate surface towards creating hydrophobic texture is considered and silicon oil impregnation of the crystallized surface is explored for improved optical transmittance and self-cleaning ability. The condition for silicon oil spreading over the solution treated surface is assessed and silicon oil and water infusions on the dust particles are evaluated. The movement of the water droplet over the silicon oil-impregnated sample is examined utilizing the high-speed facility and the tracker program. The effect of oil film thickness and the tilting angle of the surface on the sliding droplet velocity is estimated for two droplet volumes. The mechanism for the dust particle mitigation from the oil film surface by the sliding water droplet is analyzed. The findings reveal that silicon oil impregnation of the crystallized sample surface improves the optical transmittance significantly. The sliding velocity of the water droplet over the thick film (~700 µm) remains higher than that of the small thickness oil film (~50 µm), which is attributed to the large interfacial resistance created between the moving droplet and the oil on the crystallized surface. The environmental dust particles can be mitigated from the oil film surface by the sliding water droplet. The droplet fluid infusion over the dust particle enables to reorient the particle inside the droplet fluid. As the dust particle settles at the trailing edge of the droplet, the sliding velocity decays on the oil-impregnated sample.

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Anti-scaling properties of a SLIPS material prepared by silicon oil infusion in porous polyaniline obtained by electropolymerization

Cited by 30 publications

References 26 publications

Scalable Slippery Omniphobic Covalently Attached Liquid Coatings for Flow Fouling Reduction

Scalable Slippery Omniphobic Covalently Attached Liquid Coatings for Flow Fouling Reduction

Recent Progress of Bioinspired Scalephobic Surfaces with Specific Barrier Layers

Sliding Water Droplet on Oil Impregnated Surface and Dust Particle Mitigation

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