Sliding engine component

Patent metadata

Field	Value
Publication number	US-10550239-B2
Application number	US-201515326636-A
Country	US
Kind code	B2
Filing date	Jul 7, 2015
Priority date	Jul 17, 2014
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

A sliding engine component may include a plastic polymer-based composite layer on a substrate. The composite layer may include a matrix of plastic polymer-based material, and functionalised graphene nano platelets distributed throughout the matrix.

First claim

The invention claimed is:

1. A sliding engine component comprising a plastic polymer-based composite layer on a substrate, the composite layer including:
a matrix of plastic polymer-based material;
a silane material; and
functionalised graphene nano platelets distributed throughout the matrix;
wherein the functionalised graphene nano platelets comprise graphene nano platelets that are partially functionalised;
wherein the silane material is one of gamma-aminopropyltriethoxysilane or bis-(gamma-trimethoxysilpropyl)amine; and
wherein the plastic polymer material is a polyamide-imide resin.

2. A sliding engine component according to claim 1 , wherein the functionalised graphene nano platelets comprise graphene nano platelets that are functionalised with —COOH functional groups.

3. A sliding engine component according to claim 1 , wherein the functionalised graphene nano platelets comprise graphene nano platelets that are functionalised with —NH 2 functional groups.

4. A sliding engine component according to claim 1 , wherein the composite layer comprises 0.01 to 4% wt functionalised graphene nano platelets.

5. A sliding engine component according to claim 4 , wherein the silane material is in a range of 3% to 6% volume of the composite layer.

6. A sliding engine component according to claim 1 , wherein the composite layer comprises 0.1 to 2% wt functionalised graphene nano platelets.

7. A sliding engine component according to claim 1 , wherein the functionalised graphene nano platelets have a maximal planar dimension of up to 20 μm.

8. A sliding engine component according to claim 7 , wherein the functionalised graphene nano platelets have a thickness of less than 50 nm.

9. A sliding engine component according claim 1 , wherein the functionalised graphene nano platelets comprise a mean average of up to 20 layers.

10. A sliding engine component according to claim 9 , wherein the functionalised graphene nano platelets comprise a mean average of up to 4 layers.

11. A sliding engine component according to claim 9 , wherein the functionalised graphene nano platelets comprise a mean average of at least 5 layers and up to 10 layers.

12. A sliding engine component according to claim 9 , wherein the functionalised graphene nano platelets comprise a mean average ranging from at least 11 layers to 20 layers.

13. A sliding engine component according claim 1 , wherein the sliding engine component is one of a half bearing shell, a thrust washer, and a bearing bush.

14. A sliding engine component according claim 1 , wherein the gamma-aminopropyltriethoxysilane is 3-aminopropyltriethoxysilane.

15. A sliding engine component according to claim 1 , wherein the silane material is in a range of 3% to 6% volume of the composite layer.

16. A sliding engine component according to claim 1 , wherein the composite layer has a thickness of 4 μm to 12 μm.

17. A sliding engine component according to claim 16 , wherein the thickness is 8 μm to 12 μm and is built up by a deposition of two or three sub-layers.

18. An engine comprising a sliding engine component having a plastic polymer-based composite layer on a substrate, the composite layer including:
a matrix of plastic polymer-based material of polyamide-imide resin;
a silane material of one of gamma-aminopropyltriethoxysilane or bis-(gamma-trimethoxysilpropyl)amine; and
functionalised graphene nano platelets distributed throughout the matrix;
wherein the functionalised graphene nano platelets comprise graphene nano platelets that are partially functionalised;
wherein one of: (i) the matrix includes —NH2 functional groups and the functionalised graphene nano platelets comprise graphene nano platelets functionalised with —COOH functional groups bonded to the NH2 functional groups; or (ii) the matrix includes —COOH functional groups and the functionalised graphene nano platelets comprise graphene nano platelets functionalised with —NH2 functional groups bonded to the —COOH functional group;
wherein the composite layer comprises 0.01 to 4% wt functionalised graphene nano platelets; and
wherein the silane material is in a range of 3% to 6% volume of the composite layer.

19. A flat sheet element for forming a sliding engine component for an internal combustion engine, comprising a plastic polymer-based composite layer on a substrate, the composite layer including:
a matrix of plastic polymer-based material;
a silane material; and
functionalised graphene nano platelets distributed throughout the matrix;
wherein the functionalised graphene nano platelets comprise graphene nano platelets that are partially functionalised;
wherein the silane material is one of gamma-aminopropyltriethoxysilane or bis-(gamma-trimethoxysilpropyl)amine; and
wherein the plastic polymer material is a polyamide-imide resin.

Assignees

• Mahle Int Gmbh
• Mahle Engine Systems Uk Ltd

Inventors

• Laing Ian
• Latham David
• Gorges Roger

Classifications

• F16C17/022

  with a pair of essentially semicircular bearing sleeves · CPC title

• C08K3/042

  Graphene or derivatives, e.g. graphene oxides · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• C08K9/04

  Ingredients treated with organic substances {(treated with macromolecular compounds C08K9/08)} · CPC title

• F16C2360/22

  Internal combustion engines · CPC title