Articles having a surface with low wettability and method of making

a technology of liquid wettability and surface, applied in the direction of roads, instruments, traffic signals, etc., can solve the problems high degree of “sheeting” of water over the solid surface, and inability to thermally or chemically stable, etc., to achieve the effect of low liquid wettability

Inactive Publication Date: 2006-09-28
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0008] The present invention meets these and other needs by providing an article having a surface with a low liquid wettability. The surface provides properties tha

Problems solved by technology

By way of example, so-called “hydrophilic” materials have relatively high wettability in the presence of water, resulting in a high degree of “sheeting” of the water over the solid surface.
“Hydrophobic” materials have relatively low water wettability; so-called “superhydrophobic” materials have even lower water wettability, resulting in surfaces that in some cases may seem to repel any water im

Method used

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  • Articles having a surface with low wettability and method of making
  • Articles having a surface with low wettability and method of making
  • Articles having a surface with low wettability and method of making

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Embodiment Construction

[0029] In the following description, like reference characters designate like or corresponding parts throughout the several views shown in the figures. It is also understood that terms such as “top,”“bottom,”“outward,”“inward,” and the like are words of convenience and are not to be construed as limiting terms. Furthermore, whenever a particular feature of the invention is said to comprise or consist of at least one of a number of elements of a group and combinations thereof, it is understood that the feature may comprise or consist of any of the elements of the group, either individually or in combination with any of the other elements of that group.

[0030] Referring to the drawings in general and to FIG. 1 in particular, it will be understood that the illustrations are for the purpose of describing a particular embodiment of the invention and are not intended to limit the invention thereto. FIG. 1 is a schematic cross-sectional view of a surface of an article of the present invent...

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Abstract

An article comprises a textured surface disposed on a substrate. The surface has an effective liquid wettability sufficient to generate, with a reference liquid, a contact angle in a range from about 120° to about 180°. The surface comprises a material having a nominal liquid wettability sufficient to generate, with the reference liquid, a nominal contact angle in a range from about 60° to about 90°, the material comprising at least one material selected from the group consisting of a polymer and a ceramic. The properties of the surface may include low-drag or low-friction, self-cleaning capability, and resistance to icing, fouling, and fogging, and the like. Methods of making such a surface are also described.

Description

BACKGROUND OF INVENTION [0001] The invention relates to surfaces having low liquid wettability. More particularly, the invention relates to such surfaces, where the surface is characterized by having one or more of the following properties: low-friction properties, self-cleaning capability, and resistance to icing, fouling, and fogging. Even more particularly, the invention relates to articles having such surfaces. [0002] The “liquid wettability” of a solid surface is determined by observing the nature of the interaction occurring between the surface and a drop of a given liquid disposed on the surface. A surface having a high wettability for the liquid tends to allow the drop to spread over a relatively wide area of the surface, thereby “wetting” the surface. In the extreme case, the liquid spreads into a film over the surface. On the other hand, where the surface has a low wettability for the liquid, the liquid tends to retain a well-formed, ball-shaped drop shape. In the extreme ...

Claims

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Application Information

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IPC IPC(8): E01F9/04
CPCC23C18/02C23C18/122C23C18/1233Y10T428/24355E01F9/007Y10T428/24372C23C18/1279E01F9/40
Inventor GANTI, SURYAPRAKASHDENG, TAORAJENDRAN, VEERA PALANIVELUKU, ANTHONY YU-CHUNGSTEIN, JUDITHO'NEIL, GREGORY ALLENALIZADEH, AZARBLOHM, MARGARET LOUISEVENKATARAMANI, KATTALAICHERI SRINIVASAN
Owner GENERAL ELECTRIC CO
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