The present disclosure describes a strategy to create self-healing, slippery liquid-infused porous surfaces (SLIPS). Roughened (e.g., porous) surfaces can be utilized to lock in place a lubricating fluid, referred to herein as Liquid B to repel a wide range of materials, referred to herein as Object A (Solid A or Liquid A). SLIPS outperforms other conventional surfaces in its capability to repel various simple and complex liquids (water, hydrocarbons, crude oil and blood), maintain low-contact-angle hysteresis (<2.5°), quickly restore liquid-repellency after physical damage (within 0.1-1 s), resist ice, microorganisms and insects adhesion, and function at high pressures (up to at least 690 atm). Some exemplary application where SLIPS will be useful include energy-efficient fluid handling and transportation, optical sensing, medicine, and as self-cleaning, and anti-fouling materials operating in extreme environments.

Slippery surfaces with high pressure stability, optical transparency, and self-healing characteristics

A self-healing, scratch resistant slippery surface that is manufactured by wicking a chemically-inert, high-density liquid coating over a roughened solid surface featuring micro and nanoscale topographies is described. Such a slippery surface shows anti-wetting properties, as well as exhibits significant reduction of adhesion of a broad range of biological materials, including particles in suspension or solution. Specifically, the slippery surfaces can be applied to medical devices and equipment to effectively repel biological materials such as blood, and prevent, reduce, or delay coagulation and surface-mediated clot formation. Moreover, the slippery surfaces can be used to prevent fouling by microorganisms such as bacteria.

Slippery liquid-infused porous surfaces and biological applications thereof

A functional TFE copolymer fine powder is described, wherein the TFE copolymer is a polymer of TFE and at least one functional comonomer, and wherein the TFE copolymer has functional groups that are pendant to the polymer chain. The functional TFE copolymer fine powder resin is paste extrudable and expandable. Methods for making the functional TFE copolymer are also described. The expanded functional TFE copolymer material may be post-reacted after expansion.

Expandable Functional TFE Copolymer Fine Powder, the Expandable Functional Products Obtained Therefrom and Reaction of the Expanded Products

The present disclosure describes a strategy to create self-healing, slippery self- lubricating polymers. Lubricating liquids with affinities to polymers can be utilized to get absorbed within the polymer and form a lubricant layer (of the lubricating liquid) on the polymer. The lubricant layer can repel a wide range of materials, including simple and complex fluids (water, hydrocarbons, crude oil and bodily fluids), restore liquid-repellency after physical damage, and resist ice, microorganisms and insects adhesion. Some exemplary applications where self-lubricating polymers will be useful include energy-efficient, friction- reduction fluid handling and transportation, medical devices, anti-icing, optical sensing,and as self-cleaning, and anti-fouling materials operating in extreme environments.

Slippery self-lubricating polymer surfaces

A method of preparing an article having a slippery surface includes providing a metal-containing surface, chemically modifying the metal-containing surface to roughen the metal-containing surface, and disposing a lubricating layer on the roughened metal-containing surface, wherein the lubricating layer is substantially stabilized on the roughened metal-containing surface.

Slips Surface Based on Metal-Containing Compound

PROBLEM TO BE SOLVED: To obtain a sulfonic group-containing fluorine-based ionomer copolymer in a state of being readily purified. SOLUTION: This method for producing a fluorine-based ionomer copolymer is characterized in that (i) a compound of the following formula (1) [M is an alkali metal or an alkaline earth metal; m is an integer of 1 to 4; n is 0, 1 or 2] is copolymerized with (ii) tetrafluoroethylene and (iii) at least one kind selected from the group consisting of hexafluoropropylene, chlorotrifluorethylene, vinylidene fluoride, perfluoroalkyl vinyl ether (CF2=CFOCF2CF2CF3) and ethylene as a third monomer in the presence of a polymerization initiator.

Method for producing fluorine-based ionomer copolymer

PROBLEM TO BE SOLVED: To obtain a silicon-contg. org. fluoropolymer which can be applied to various substrates and has excellent antifouling properties by selecting a silicon-contg. org. fluoropolymer comprising specific structural units. SOLUTION: This silicon-contg. org. fluoropolymer is a polymer represented by formula I (wherein Rf is a perfluoroalkyl; Z is F or CF 3 ; (a) to (e) are each an integer of 0 or higher provided the sum of (a) to (e) is 1 or higher; Y is H or a 1-4C alkyl; X is H, Br, or I; R 1 is hydroxyl or a hydrolyzable group; R 2 is H or a hydrocarbon group; (l) is 0-2; (m) is 1-3; and (n) is an integer of 2 or higher) and having a number average mol.wt. of 5×10 2 -1×10 5 or is a mixture of polymers repesented by formula II (wherein each of (g) is an integer of 0 or higher and the mean value of (g) is higher than 1). This fluoropolymer is produced by reacting an iodine-terminated org. fluoropolymer represented by formula III with a vinylsilane compd. represented by formula IV. COPYRIGHT: (C)1997,JPO

Silicon-containing organic fluoropolymer and its production

PURPOSE:To obtain an oil-contg. porous body suitable for a bearing, an oil retainer, etc., by impregnating a porous molding obtd. from a polytetrafluoroethylene molding powder with an oil. CONSTITUTION:This oil-contg. porous body is obtd. by baking a polytetrtafluoroethylene molding powder and impregnating the resulting porous molding with an oil. A lubricating or edible oil is used for the impregnation. The porous molding is pref. obtd. from the powder having baking densification indexes P10, P25, and P50 each not higher than 0.2. The porous molding of any desired shape can be easily obtd. by premolding the powder under a low pressure and baking the resulting molding at the m.p. of polytetrafluoroethylene or higher.

Oil-containing porous body

PURPOSE:To obtain the copolymer being excellent in heat resistance and chemical resistance, having a low degree of crystallinity and giving derivatives useful for various uses by using a specified nitrogenous fluorocarbon and a specified ethylenically unsaturated compound as the constituent monomers. CONSTITUTION:A nitrogenous fluorocarbon of the formula (wherein m is 0 or 1; n is 0-10; and R and R are each 1-5C linear perfluoroalkyl, or perfluoro groups which, together with the N atom, form a ring structure) and at least one ethylenically unsaturated compound selected from among tetrafluoroethylene, vinylidene fluoride, vinyl fluoride, chlorotrifluoroethylene and ethylene are used as the constituent monomers. It is desirable that the melt viscosity of this copolymer is about 100000 to about 5000000 P, and that its molecular weight is about 5000 to 150000.

Nitrogenous fluorocarbon copolymer, its production and its use

PROBLEM TO BE SOLVED: To purify and to concentrate a fluorine-based ionomer and to make the fluorine-based ionomer into a film. SOLUTION: This method for purifying and concentrating an ionomer is characterized in that a fluorine-based ionomer solution or dispersion is ultrafiltered. This method for forming a fluorine-based ionomer film is characterized in that a necessary amount of a cation affinity material as a film-forming auxiliary is added to the solution or dispersion when the fluorine-based ionomer solution or dispersion is cast into a substrate to form a film. COPYRIGHT: (C)2001,JPO

Method for purifying and concentrating fluorine-based ionomer

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Method for producing fluorine-based ionomer copolymer

Silicon-containing organic fluoropolymer and its production

Oil-containing porous body

Nitrogenous fluorocarbon copolymer, its production and its use

Method for purifying and concentrating fluorine-based ionomer

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Papers

Method for producing fluorine-based ionomer copolymer

Silicon-containing organic fluoropolymer and its production

Oil-containing porous body

Nitrogenous fluorocarbon copolymer, its production and its use

Method for purifying and concentrating fluorine-based ionomer

正祥建元