Hybrid Hairy Janus Particles for Anti-Icing and De-Icing Surfaces: Synergism of Properties and Effects

Kirillova, Alina; Ionov, Leonid; Roisman, Ilia V.; Synytska, Alla

doi:10.1021/acs.chemmater.6b02765

Cited by 50 publications

(46 citation statements)

References 62 publications

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“…Ice formation often initiates with heterogeneous nucleation on solid surfaces; how solid surfaces affect the subsequent ice growth therefore becomes critical (22,38). Although effects of temperature and humidity on ice growth have been extensively investigated, the influence of solid substrates has not been paid deserved research (10).…”

Section: Discussionmentioning

confidence: 99%

Distinct ice patterns on solid surfaces with various wettabilities

Liu

Zhu

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

160

101

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No relationship has been established between surface wettability and ice growth patterns, although ice often forms on top of solid surfaces. Here, we report experimental observations obtained using a process specially designed to avoid the influence of nucleation and describe the wettability-dependent ice morphology on solid surfaces under atmospheric conditions and the discovery of two growth modes of ice crystals: along-surface and off-surface growth modes. Using atomistic molecular dynamics simulation analysis, we show that these distinct ice growth phenomena are attributable to the presence (or absence) of bilayer ice on solid surfaces with different wettability; that is, the formation of bilayer ice on hydrophilic surface can dictate the along-surface growth mode due to the structural match between the bilayer hexagonal ice and the basal face of hexagonal ice (ice I h ), thereby promoting rapid growth of nonbasal faces along the hydrophilic surface. The dramatically different growth patterns of ice on solid surfaces are of crucial relevance to ice repellency surfaces.surface wettability | ice growth | ice crystal | antiicing | molecular dynamics simulation I ce crystals with rich morphologies are ubiquitous in nature, and understanding the ice formation mechanism on the molecular level has immense implications in diverse disciplines, such as atmospheric science, astrophysics, aerospace engineering, and food science (1-7). The natural patterns of ice crystals can be determined by the interplay between the external macroscopic forces and the microscopic interfacial behaviors (8, 9). The sixfold symmetry of snowflakes, for example, has reflected the transfer from the microscopic information to the macroscopic morphology (10,11). However, things can be completely different when a solid surface is exposed to a growing ice crystal because of the introduction of the asymmetrical external force at the microscopic level (12,13). Consequently, window frost, one of the unique sceneries of winter, usually exhibits almost infinite morphological variants. In particular, microscopic water structures have recently been studied on surfaces with various chemical composition and atom structures (e.g., metal, metal oxide, and mica) (13)(14)(15)(16)(17). However, a correlation between the microscopic water structures and the macroscopic patterns of ice crystals supported by solid surfaces has not been explored. Ice Growth Patterns on Surfaces with Various WettabilitiesBy introducing nanoparticles with inherently low nucleation barriers to ice formation onto surfaces (18), here we report distinct ice growth patterns on surfaces with adjusting wettabilities through changing the fluorine content of the fluoroalkyl silane modified surface. Fig. 1A presents a schematic illustration of the experimental design. Silver iodide (AgI) nanoparticles were chosen as ice nucleation active sites (19,20) to allow ice nucleation to occur at the same time (and the same temperature) across the entire solid surface in the same experimental environm...

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Section: Discussionmentioning

confidence: 99%

Distinct ice patterns on solid surfaces with various wettabilities

Liu

Zhu

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

160

101

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“…However, different methods are used to evaluate the icephobicity of the surface. In particular, this can be evaluated by measuring the ice adhesion with different tests (Ref 45, 46), by studying the delay of droplet freezing (Ref 47, 48), the frost formation (Ref 49,50), and the attitude of a cold surface to repel impacting water droplets ( Ref 11,51). In this work, the ice adhesion was measured by using the centrifugal adhesion method (Ref 35) to compare the icephobic characteristic of the produced coatings.…”

Section: Icephobicity and Wettability Of The Coating Surfacementioning

confidence: 99%

Icephobic Behaviour and Thermal Stability of Flame-Sprayed Polyethylene Coating: The Effect of Process Parameters

et al. 2019

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The present work investigates the effect of different process parameters on the production of low-density polyethylene (LDPE) coatings by flame spray technology. Previously, flame spraying of polymers has been successfully performed to obtain durable icephobic coatings, providing an interesting solution for applications facing icing problems, e.g. in marine, aviation, energy, and transportation industry. However, the fine tailoring of the process parameters represents a necessary strategy for optimising the coating production due to the unique thermal properties of each polymer. For this purpose, we vary the heat input of the process during flame spraying of the coating, by changing the transverse speed and the spraying distance. The results show that the variation in the process parameters strongly influenced the quality of the polymer coating, including its areal roughness, thickness, chemical composition, thermal stability, and degree of crystallinity. Furthermore, we demonstrate that these properties significantly affect the icephobic behaviour of the surface within the spray window of the chosen parameters. In conclusion, the relationship between the thermal degradation of the polymer and the icephobicity of the surface was defined. This highlights the importance of process parameter optimisation in order to achieve the desired icephobic performance of the LPDE coatings.

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“…Die Janus‐Partikel wurden ausgehend von APS‐funktionalisierten Silica‐Partikeln in einem kombinierten Grafting‐from/Grafting‐to‐Verfahren hergestellt. Eine genaue Beschreibung der Synthese findet sich in der Literatur . Der Erfolg aller Partikelsynthesen wurde jeweils mittels elektrokinetischer Zetapotenzialmessungen, Thermogravimetrie, Raster‐ und Transmissionselektronen‐Mikroskopie überprüft.…”

Section: Materials Und Methodenunclassified

“…Die Synthese der hybriden, bifunktionalen Janus‐Partikel erfolgte ausgehend von sphärischen Silica‐Partikeln aus dem Stöber‐Verfahren, die mit 3‐Aminopropyltriethoxysilan präfunktionalisiert wurden. Danach wurden die Partikel zunächst in einem Pickering‐Emulsions‐Verfahren nach Synytska et al an der Wachsoberfläche immobilisiert und partiell maskiert . Die freiliegenden Hemisphären der Partikel konnten so selektiv mit einem ATRP‐Initiator modifiziert werden und nach Ablösung des Wachses erfolgte das Grafting‐from von PDMAEMA mittels ARGET (activators regenerated by electron transfer)‐ATRP und das thermische Grafting‐to von carboxyterminiertem PAA oder PNIPAM auf der aminofunktionalisierten Seite.…”

Section: Ergebnisseunclassified

Funktionalisierte Kern‐Schale‐Partikel als Träger zur Enzymimmobilisierung und deren Anwendung

Matura

Köpke

Marschelke

et al. 2020

Chemie Ingenieur Technik

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Mono‐ und bifunktionale hybride Kern‐Schale‐Partikel wurden für die Enzymimmobilisierung eingesetzt. An monofunktionalen Poly(2‐dimethylamino)ethylmethacrylat‐modifizierten Partikeln wurden die idealen Bedingungen für die Immobilisierung untersucht. Anschließend erfolgte die Übertragung auf bifunktionale Janus‐Partikel‐Systeme, mit denen gleichzeitig die schaltbare Abtrennung und der erneute Einsatz der Enzyme möglich waren. Abschließend wurde der mehrfache Einsatz der enzymbeladenen Partikel modellhaft am Beispiel der Prozesswasserentfärbung aus der Textilindustrie mit Laccase gezeigt und eine Kostenrechnung durchgeführt.

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Hybrid Hairy Janus Particles for Anti-Icing and De-Icing Surfaces: Synergism of Properties and Effects

Cited by 50 publications

References 62 publications

Distinct ice patterns on solid surfaces with various wettabilities

Distinct ice patterns on solid surfaces with various wettabilities

Icephobic Behaviour and Thermal Stability of Flame-Sprayed Polyethylene Coating: The Effect of Process Parameters

Funktionalisierte Kern‐Schale‐Partikel als Träger zur Enzymimmobilisierung und deren Anwendung

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