Icephobic performance on the aluminum foil-based micro-/nanostructured surface

Chen, Yu; Liu, Guicheng; Jiang, Lei; Kim, Ji Young; Ye, Feng; Lee, Joong Kee; Wang, Lei; Wang, Bo

doi:10.1088/1674-1056/26/4/046801

Cited by 7 publications

(3 citation statements)

References 46 publications

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“…By sintering the mixture of PVDF powder and Zn(Ac) 2 -based crystalline powder at its melting temperature of ∼270 °C to form the ZnO seeds in the PVDF material, Wen et al fabricated a superhydrophobic ZnO nanorods modified PVDF surface with robust antifogging and icing-delay properties . For coating the ZnO seeds on polymer substrate, Wang et al first sintered the Zn(NO 3 ) 2 solution on an aluminum model at 300 °C to form a ZnO seed layer and then transferred the ZnO seeds from the model to a polydimethylsiloxane (PDMS) surface by a soft lithography. , Finally, they fabricated a superhydrophobic ZnO nanorods modified PDMS surface with robust anti-icing and de-icing properties by growing the ZnO nanorods on the PDMS surface through an enhanced hydrothermal method and coating a 1 H ,1 H ,2 H ,2 H -perfluorodecyltriethoxysilane (PDTS) layer on the ZnO-grown PDMS substrate to decrease the surface free energy due to the lower surface free energy of the PDTS. However, the high-temperature sintering for forming ZnO seeds cannot be used on the PVDF membranes.…”

Section: Introductionmentioning

confidence: 99%

ZnO Nanorod Array Modified PVDF Membrane with Superhydrophobic Surface for Vacuum Membrane Distillation Application

Wang

Liu²,

Yu³

et al. 2018

ACS Appl. Mater. Interfaces

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125

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The vacuum membrane distillation (VMD) is a promising technology for lots of applications. To solve the membrane fouling and wetting problems, in this paper, a novel ZnO nanorods 1 H,1 H,2 H,2 H-perfluorodecyltriethoxysilane (PDTS) modified poly(vinylidene fluoride) (PVDF) membrane with a micro/nanoscale hierarchical structure and a superhydrophobic surface has been prepared and applied to the VMD process for distilling highly salty water, for the first time. Among these, a pyrolysis-adhesion method is created to obtain the ZnO seeds and fasten them on the PVDF substrate firmly. The novel modified membrane shows a stable superhydrophobic surface with a water contact angle of 152°, easy cleaning property, excellent thermal and mechanical stability, because of the Cassie's state caused by pocketing much air in the hydrophobized ZnO nanorods, the low surface energy of PDTS coating, and the strong adhesion between ZnO nanorods and PVDF membrane, which has built an ideal structure for VMD application. After 8 h VMD of 200 g L NaCl solution, compared to the virgin PVDF membrane, the novel membrane shows a similar permeate flux but a much higher quality permeated liquid because of its unique antifouling and antiwetting caused by the several microns gap between the feed and the membrane. Due to its easy cleaning property, the novel membrane also exhibits an excellent reusability.

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Section: Introductionmentioning

confidence: 99%

ZnO Nanorod Array Modified PVDF Membrane with Superhydrophobic Surface for Vacuum Membrane Distillation Application

Wang

Liu²,

Yu³

et al. 2018

ACS Appl. Mater. Interfaces

Self Cite

125

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“…The self-propelled jumping phenomenon induced by droplets coalescence is considered with distinct engineering application prospects, [1,2] as it helps surfaces to achieve anti-condensation, [3,4] anti-icing, [5,6] and selfcleaning properties. [7,8] Understanding the mechanism of selfpropelled jumping phenomenon is crucial for optimized manufacturing of outdoor functional coatings, for instance, the insulation coatings of electrical power system's apparatuses, with the above-described properties, to reduce the hazards induced by high humidity, icing, and contamination.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of the self-propelled jumping capabilities of coalesced droplets on RTV surfaces and superhydrophobic surfaces

et al. 2021

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Understanding the mechanism of coalescence-induced self-propelled jumping behavior provides distinct insights in designing and optimizing functional coatings with self-cleaning and anti-icing properties. However, to date self-propelled jumping phenomenon has only been observed and studied on superhydrophobic surfaces, other than those hydrophobic surfaces with weaker but fairish water-repellency, for instance, vulcanized silicon rubber (RTV) coatings. In this work, from the perspective of thermodynamic-based energy balance aspect, the reason that self-propelled jumping phenomenon does not happen on RTV coatings is studied. The apparent contact angles of droplets on RTV coatings can be less than the theoretical critical values therefore cannot promise energy surplus for the coalesced droplets onside. Besides, on RTV and superhydrophobic surfaces, the droplet-size dependent variation characteristics of the energy leftover from the coalescence process are opposite. For the droplets coalescing on RTV coatings, the magnitudes of energy dissipations are more sensitive to the increase in droplet size, compared to that of released surface energy. While for superhydrophobic coatings, the energy generated during the coalescence process can be more sensitive than the dissipations to the change in droplet size.

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“…In nature, surfaces that are capable of transporting liquid droplets are ubiquitous, such as butterfly wings, [2,3] rice leaves, [4,5] and feathers of ducks and geese. [6] Inspired by these surfaces, various methods have been developed to prepare surfaces with similar directional liquid transport ability, [7,8] which shows potential for a tremendous range of applications from anti-icing, [9,10] dip-pen nanolithography, to oil/water separation. On the one hand, solid surfaces with a specific curvature gradient are designed to collect the droplet through directional movement of droplets.…”

Section: Introductionmentioning

confidence: 99%

Microdroplet targeting induced by substrate curvature

Zhang¹,

Guo²,

Chen³

et al. 2018

Chinese Phys. B

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Fundamental understanding of the wettability of curved substrates is crucial for the applications of microdroplets in colloidal science, microfluidics, and heat exchanger technologies. Here we report via lattice Boltzmann simulations and energetic analysis that microdroplets show an ability of transporting selectively to appropriate substrates solely according to substrate shape (curvature), which is called the substrate-curvature-dependent droplet targeting because of its similarity to protein targeting by which proteins are transported to the appropriate destinations in the cell. Two dynamic pathways of droplet targeting are identified: one is the Ostwald ripening-like liquid transport between separated droplets via evaporating droplets on more curved convex (or less curved concave) surfaces and growing droplets on less curved convex (or more curved concave) surfaces, and the other is the directional motion of a droplet through contacting simultaneously substrates of different curvatures. Then we demonstrate analytically that droplet targeting is a thermodynamically driven process. The driving force for directional motion of droplets is the surface-curvature-induced modulation of the work of adhesion, while the Ostwald ripening-like transport is ascribed to the substrate-curvature-induced change of droplet curvature radius. Our findings of droplet targeting are potentially useful for a tremendous range of applications, such as microfluidics, thermal control, and microfabrication.

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Icephobic performance on the aluminum foil-based micro-/nanostructured surface

Cited by 7 publications

References 46 publications

ZnO Nanorod Array Modified PVDF Membrane with Superhydrophobic Surface for Vacuum Membrane Distillation Application

ZnO Nanorod Array Modified PVDF Membrane with Superhydrophobic Surface for Vacuum Membrane Distillation Application

A comparative study of the self-propelled jumping capabilities of coalesced droplets on RTV surfaces and superhydrophobic surfaces

Microdroplet targeting induced by substrate curvature

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