# US 2015/0144522 A1 · Nucleation and destabilization of liquids on liquid-impregnated surfaces

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- Number: US 2015/0144522 A1
- Document ID: US20150144522A1
- Status: Published application
- Kind: A1
- Application number: 14/552,778
- Filed: 2014-11-25
- Published: 2015-05-28
- Earliest claimed: 2013-11-25
- Applicants: LiquiGlide Inc.
- Inventors: Charles HIBBEN; J. David SMITH; Kripa K. VARANASI
- Web page: https://patentgrep.com/patent/US20150144522A1

## CPC

- B65D 25/14: Linings or internal coatings (of containers made by folding or erecting blanks made of paper B65D5/56 {; linings for domestic water storage heaters F24H1/183})
- B08B 7/0014: {by incorporation in a layer which is removed with the contaminants}
- B08B 17/065: {the surface having a microscopic surface pattern to achieve the same effect as a lotus flower}
- Y10T 29/49826: Assembling or joining
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A container for housing a contact liquid includes a liquid-impregnated surface in contact with a contact liquid. The liquid-impregnated surface includes a first surface having a first roll off angle. A plurality of solid features are disposed on the first surface, such that a plurality of interstitial regions are defined between the plurality of solid features. An impregnating liquid is disposed in the interstitial regions and the interstitial regions are configured such that that the impregnating liquid is retained in the interstitial regions by capillary forces. The impregnating liquid disposed in the interstitial regions defines a second surface having a second roll off angle less than the first roll off angle. The container further includes a nucleation mechanism configured to nucleate and destabilize a film of the contact liquid disposed on the liquid-impregnated surface, such that the film of the contact liquid can be rapidly removed from the container.

## Claims

### Claim 1

An article comprising:
a liquid-impregnated surface, wherein said surface comprises a matrix of solid features spaced sufficiently close to stably contain an impregnating liquid therebetween and/or therewithin regardless of orientation of the article, wherein the article includes an impregnating liquid between and/or within the matrix of solid features, the article configured to contain a contact liquid different from the impregnating liquid, wherein the solid features have an average dimension in a range of up to 200 microns; and
a nucleation mechanism configured to nucleate and destabilize a film of the contact liquid that remains disposed on the liquid-impregnated surface after a bulk of the contact liquid has been displaced from the liquid-impregnated surface.

### Claim 2 (depends on 1)

The article of claim 1, wherein the article is a container.

### Claim 3 (depends on 1)

The article of claim 1, wherein the nucleation mechanism includes a nucleation member, the nucleation member configured to contact the film of the contact liquid thereby nucleating and destabilizing the film of the contact liquid.

### Claim 4 (depends on 3)

The article of claim 3, wherein the nucleation member has a density less than a density of the contact liquid such that the nucleation member floats in a bulk of the contact liquid, the nucleation member coupled to an anchor disposed on an inner surface of a side wall of the article.

### Claim 5 (depends on 3)

The article of claim 3, wherein the nucleation member includes at least one of a solid ball, a jack, a pyramid, a polygon, and a pendulum.

### Claim 6 (depends on 3)

The article of claim 3, wherein the nucleation member is hollow.

### Claim 7 (depends on 3)

The article of claim 3, wherein an outer surface of the nucleation member includes at least one of needles, jacks, sharp edges, and barbs disposed thereon.

### Claim 8 (depends on 1)

The article of claim 1, wherein the nucleation mechanism includes a nucleation member and a biasing member, the biasing member configured to be engaged by a user and to move the nucleation member from a first configuration in which the nucleation member does not contact the film of the contact liquid, and into a second configuration in which the nucleation member contacts the film of the contact liquid, thereby nucleating and destabilizing the film of the contact liquid.

### Claim 9 (depends on 3)

The article of claim 3, wherein the nucleation member is a hook, the hook including a plurality of barbs.

### Claim 10 (depends on 1)

The article of claim 1, wherein the nucleation mechanism includes a nucleation member and a biasing member, the biasing member configured to:
urge the nucleation member to swing towards an inner surface of a side wall of the article and to contact the film of the contact liquid when engaged by a user; and
urge the nucleation member to swing away from the inner surface of the side wall when disengaged by the user.

### Claim 11 (depends on 1)

The article of claim 1, wherein the nucleation mechanism includes:
an opening disposed on a side wall of the article; and
a reservoir of a gas disposed on an outer surface of a side wall of the article, the reservoir in fluidic communication, via an outlet, with an internal volume defined by the article, the reservoir further including a plunger, the plunger configured, when engaged by a user, to deliver a portion of the gas contained within the reservoir into the internal volume defined by the article such that the portion of the gas contacts the film of the contact liquid, thereby nucleating and destabilizing the film of the contact liquid.

### Claim 12 (depends on 1)

The article of claim 1, wherein the nucleation mechanism defines one or more voids disposed on an inner surface of a side wall of the article, each of the one or more voids defining an interior volume configured to trap air, the nucleation mechanism configured such that, in use, air bubbles are released from the voids into the contact liquid and contact the film of the contact liquid thereby nucleating and destabilizing the film of the contact liquid.

### Claim 13 (depends on 12)

The article of claim 12, wherein the one or more voids are monolithically formed with the container.

### Claim 14

A liquid-destabilizing apparatus comprising:
a container including a substantially non-wetting surface, the surface having at least one of: a plurality of solid features and an impregnating liquid disposed thereon; and
a nucleation member including at least one of:
a nucleation object attached to an internal surface of the container by a tether;
a reciprocating plunger disposed within the container;
a pivotable rocker disposed within the container;
an orifice in a wall of the container, the orifice coupled to a chamber comprising a plunger, the chamber and plunger disposed outside of, but attached to, the container; and
a plurality of voids defined within an end wall of the container,
the nucleation mechanism configured, in use, to contact and destabilize a film of a contact liquid disposed on the non-wetting surface.

### Claim 15 (depends on 14)

The apparatus of claim 14, wherein the nucleation member has a density less than a density of the contact liquid such that the nucleation member floats in a bulk of the contact liquid.

### Claim 16 (depends on 14)

The apparatus of claim 14, wherein the nucleation member includes the nucleation object attached to the internal surface of the container by the tether, wherein an outer surface of the nucleation object comprises at least one of needles, jacks, sharp edges, and barbs.

### Claim 17 (depends on 14)

The apparatus of claim 14, wherein the nucleation mechanism is configured, in use, to contact and destabilize the film of the contact liquid disposed on the non-wetting surface in response to a user action.

### Claim 18 (depends on 14)

The apparatus of claim 14, wherein the nucleation member includes the reciprocating plunger disposed within the container, the reciprocating plunger comprising at least one of a hook and a barb.

### Claim 19 (depends on 14)

The apparatus of claim 14, wherein the nucleation member includes the reciprocating plunger disposed within the container and a biasing element.

### Claim 20 (depends on 14)

The apparatus of claim 14, wherein the nucleation member includes the pivotable rocker disposed within the container and a biasing element.

### Claim 21

A method of manufacturing a liquid-destabilizing article, the method comprising:
providing a container including a plurality of walls defining an interior volume;
applying and/or forming a matrix of solid features on an interior surface of the container;
introducing an impregnating liquid into one or more interstitial regions defined by one or more spaces between the solid features of the matrix, such that the impregnating liquid is stably contained within the one or more interstitial regions regardless of orientation of the container; and
attaching at least one of:
a nucleation object and tether to an internal surface of the container;
a reciprocating plunger to an internal surface of the container;
a pivotable rocker to an internal surface of the container;
a chamber comprising a plunger to an external surface of the container; and
a plurality of void-defining structures to an interior surface of an end wall of the container.