Solidifiable composition for preparaton of liquid-infused slippery surfaces and methods of applying

Patent metadata

Field	Value
Publication number	US-10385181-B2
Application number	US-201414773611-A
Country	US
Kind code	B2
Filing date	Mar 13, 2014
Priority date	Mar 13, 2013
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

A body having a lubricant reservoir is described, comprising: a porous polymeric body; and a lubricating liquid, said lubricating liquid occupying the pores to provide a lubricated porous surface having a lubricant reservoir and a lubricant overlayer over the polymer surface. Also described herein is a system for use in the formation of a low-adhesion and low-friction surface includes a flowable precursor composition comprising a prepolymer and a curing agent, said composition capable of application as a coating over a large surface area; a lubricating liquid that is capable of forming a coating with the hardened precursor composition, wherein the lubricating liquid and hardened polymer together form a coating of lubricating liquid stabilized on and in the hardened polymer; and instructions for applying the precursor composition onto a surface for the purpose of obtaining a low-adhesion and low-friction surface.

First claim

What is claimed is:

1. A polymeric body for repelling solids or liquids, the polymeric body comprising:
(a) a cured polymer body, an external surface on an exterior of the cured polymer body, and an internal microporosity formed of a plurality of pores within an interior of the cured polymer body, wherein the plurality of pores have a pore volume in the range of 1-25% of the cured polymer; and
(b) a lubricating liquid, wherein the lubricating liquid has an affinity for the cured polymer body such that it swells the cured polymer body and is both disposed in the plurality of pores and diffused through the cured polymer body to form a lubricant overlayer on the external surface;
(c) wherein lubricating liquid from within the plurality of pores is diffusible through the polymer body to the external surface to replenish depleted lubricant overlayer.

2. The body of claim 1 , wherein the lubricating liquid swells the cured polymer body.

3. The body of claim 1 , wherein the plurality of pores is discontinuous.

4. The body of claim 1 , wherein the plurality of pores is continuous.

5. The body of claim 1 , wherein the external surface comprises a skin layer, and the skin layer is of a lower porosity than the internal microporosity.

6. The body of claim 5 , wherein the skin layer is non-porous.

7. The body of claim 1 , further comprising one or more additives selected from the group consisting of small molecules, microparticle fillers, nanoparticle fillers, and a combination thereof.

8. The body of claim 1 , wherein the polymeric body has a mass swelling ratio greater than 1 and less than or equal to 3.

9. The body of claim 1 , wherein the polymeric body has a volume swelling ratio of greater than 1 and less than or equal to 3.

10. The body of claim 1 , further comprising an adhesive backed substrate, wherein the cured polymer body is applied to the adhesive backed substrate.

11. The body of claim 1 , wherein the cured polymer body is a polyfluoropolymer or a silicone polymer.

12. The body of claim 1 , wherein the cured polymer body is molded to a form.

13. The body of claim 12 , wherein the form is a flat, curved, round, tubular, sharpened, mesh, or roughened surface of a tube, catheter, cable, wire, or film.

14. The body of claim 1 , wherein the lubricating liquid is selected from the group consisting of fluorinated lubricants (liquids or oils), silicones, mineral oil, plant oil, water (or aqueous solutions including physiologically compatible solutions), ionic liquids, polyolefins, including polyalpha-olefins (PAO), synthetic esters, polyalkylene glycols (PAG), phosphate esters, alkylated naphthalenes (AN), silicate esters, and mixtures of any of these.

15. The system of claim 11 wherein the cured polymer body is a silicone polymer.

16. The system of claim 15 wherein lubricating liquid is a silicone liquid.

17. The body of claim 10 wherein the cured polymer body comprises a silicone polymer and the lubricating liquid comprises a silicone liquid.

18. The body of claim 5 wherein the cured polymer body comprises a silicone polymer and the lubricating liquid comprises a silicone liquid.

19. The body of claim 3 wherein the cured polymer body comprises a silicone polymer and the lubricating liquid comprises a silicone liquid.

20. The body of claim 2 wherein the cured polymer body comprises a silicone polymer and the lubricating liquid comprises a silicone liquid.

21. The body of claim 1 , wherein the plurality of pores have a distribution of pore sizes from 200 nm to 10 μm.

22. The body of claim 1 , wherein the plurality of pores have a distribution of pore sizes from 100 nm to 30 μm.

23. The body of claim 1 , wherein the plurality of pores have a distribution of pore sizes from 50 nm to 1 mm.

24. The body of claim 1 , wherein the external surface has no or little porosity compared to the internal microporosity.

25. The body of claim 1 , wherein the external surface comprises a smooth, non-porous skin layer.

26. The body of claim 25 , wherein the cured polymer comprises a polysiloxane; and
wherein the skin layer has a thickness of about 256 μm to 495 μm.

27. The body of claim 1 , wherein the plurality of pores comprises micro-sized pores.

28. The body of claim 1 , wherein the cured polymer comprises a polysiloxane; and
wherein the plurality of pores comprises pores having a diameter in the range of 100 nm to 10 μm.

29. The body of claim 1 , wherein the plurality of pores is discontinuous; and
wherein the plurality of pores comprises pores having a diameter in the range of 100 nm to 30 μm.

30. The body of claim 1 , wherein the plurality of pores is continuous; and wherein the plurality of pores comprises pores having a diameter in the range of about 1 μm to 1 mm.

Assignees

• Harvard College

Inventors

• Aizenberg Joanna
• Aizenberg Michael
• Kim Philseok
• Vena Alex

Classifications

• C09D5/1693

  as part of a multilayer system · CPC title

• C09D5/1687

  Use of special additives · CPC title

• B63B5/24

  made predominantly of plastics {(surf boards B63B32/57)} · CPC title

• B63B1/36

  using mechanical means · CPC title

• B63B1/34

  by reducing surface friction · CPC title