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Effect of fiber orientation on shape and stability of air–water interface on submerged superhydrophobic electrospun thin coatings
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10.1063/1.3697895
/content/aip/journal/jap/111/6/10.1063/1.3697895
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/6/10.1063/1.3697895
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Examples of microfabricated superhydrophobic coating. (a) fibrous superhydrophobic coating composed of randomly oriented fibers produced via dc-electrospinning; (b) fibrous superhydrophobic coating composed of orthogonally deposited fibers produced via dc-biased ac-electrospinning.

Image of FIG. 2.
FIG. 2.

(a) Top-view schematic of a fibrous superhydrophobic surface that consists of fibers of arbitrary widths and orientations. Note that the dark color represents fibers. (b) A force balance diagram corresponding to the air–water interface of a pore on the fibrous surface.

Image of FIG. 3.
FIG. 3.

Calculated meniscus surfaces for a fibrous superhydrophobic surface (a) at P = 5 kPa; and (b) at the critical pressure P = 46 kPa; (c) calculated gradient () contours at the critical pressure P = 46 kPa. Blue to red represents 0 to 0.6 in the contours.

Image of FIG. 4.
FIG. 4.

Calculated meniscus surfaces and gradient contours at the critical pressure for (a) dc-electrospun, (b) ac-electrospun fibrous surface. Blue to red represents 0 to 0.6 in the contours.

Image of FIG. 5.
FIG. 5.

Predicted critical pressure vs the size of the computational domain. Calculations become domain size independent, at a domain size of 40d 40d, where d is the fiber diameter.

Image of FIG. 6.
FIG. 6.

Predicted critical pressure values vs gas area fraction, for the dc-electrospun and ac-electrospun coatings with d = 100 nm, and  = 120°.

Image of FIG. 7.
FIG. 7.

Predicted critical pressure values vs fiber diameter, for the dc-electrospun and ac-electrospun coatings with  = 0.7, and  = 120°.

Image of FIG. 8.
FIG. 8.

Predicted critical pressure values vs contact angle, for the dc-electrospun and ac-electrospun coatings with  = 0.7, and d = 100 nm.

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/content/aip/journal/jap/111/6/10.1063/1.3697895
2012-03-30
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of fiber orientation on shape and stability of air–water interface on submerged superhydrophobic electrospun thin coatings
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/6/10.1063/1.3697895
10.1063/1.3697895
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