Solid dry-type lubricant

Patent metadata

Field	Value
Publication number	US-11613630-B2
Application number	US-202017110939-A
Country	US
Kind code	B2
Filing date	Dec 3, 2020
Priority date	Dec 3, 2020
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

One or more techniques and/or systems are disclosed for a dry-type lubricant for use in a dry product hopper to help improve dry product flow and to improve anti jamming properties of the dry product. The example lubricant can comprise a hydrophilic fiber, such as cellulose, having a width to length aspect ratio that provides a thin fiber. A plurality of hydrophobic particles are deposited on the surface of the fiber, resulting in a fiber surface exhibiting amphiphobic properties. Further, the fiber can operably absorb water, and then releases the absorbed water to the surface of the fiber under mechanical stress, such as when mixed with a product in a hopper. This can result in the water being disposed on the surface of the fiber, to provide lubrication to a product in a hopper to improve flow and anti jamming characteristics of the product in the hopper.

First claim

What is claimed is:

1. A lubricant for use in a hopper fed system, comprising:
a hydrophilic fiber having a width to length aspect ratio of at least one to greater than one; and
a plurality of hydrophobic particles respectively disposed on the surface of the fiber, resulting in a fiber surface exhibiting amphiphobic properties;
wherein the fiber operably absorbs a liquid, and releases the absorbed liquid to the surface of the fiber under mechanical stress, resulting in the liquid being disposed on the surface of the fiber thereby operably providing lubrication to a product in a hopper to improve flow and anti-jamming characteristics of the product in the hopper.

2. The lubricant of claim 1 , the fiber comprising a biodegradable polymer, comprising one or more of: cellulose, starch, lignin, collagen, silk, protein, polyglycolic acid (PGA), polylactic acid (PLA), polycaprolactone (PCL), polydioxanone (PDS), and polyhydroxybutyrate (PHB).

3. The lubricant of claim 1 , the fiber comprising one or more of: hydroxyl groups disposed on the surface, and carbonyl groups.

4. The lubricant of claim 3 , comprising adsorbed water disposed on the hydroxyl groups.

5. The lubricant of claim 1 , the respective particles rising to height of from thirty to one-hundred and thirty nanometers from the surface of the fiber.

6. The lubricant of claim 1 , the particles comprising one or more of a silane, amide, esther, ether, and an acyl linkage.

7. The lubricant of claim 6 , the silane polymerized to the surface of the fiber using adsorbed water disposed on the surface of the fiber.

8. The lubricant of claim 6 , the silane deposited on the fiber surface using an inert carrier.

9. The lubricant of claim 8 , the inert carrier comprising one or more of: hexane, and nitrogen gas.

10. The lubricant of claim 1 , the mechanical stress comprising pressure from the product operably mixed with the lubricant resulting in the fiber releasing the absorbed water to the surface of the hydrophobic particles.

Assignees

• Univ Iowa State Res Found Inc
• Iowa State Univ Research Foundation

Inventors

• Thuo Martin
• Gregory Paul Ramon
• Chang Boyce S
• Du Chuanshen

Classifications

• C10M177/00

  Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes · CPC title

• C10N2020/081

  Biodegradable compounds · CPC title

• C10M161/00 Primary

  Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential · CPC title

• C10M2227/04

  having a silicon-to-carbon bond, e.g. organo-silanes · CPC title

• C10M171/06 Primary

  Particles of special shape or size · CPC title