Composite material
AssigneeImperial College of Science, Technology and Medicine
InventorsFrancois De Luca, Milo Sebastian Peter Shaffer, Alexander Bismarck
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Abstract
A coated fibre comprising a fibre and a coating, wherein the coating comprises nanoplatelets and a polymer, wherein the coating has a layered structure comprising at least two bilayers, each bilayer comprising a nanoplatelet layer and a polymer layer is described. A composite material comprising a plurality of coated fibres and a matrix is also described.
Claims36
A coated fiber comprising a fiber and a coating, wherein the coating comprises nanoplatelets and a polymer, wherein the coating has a layered structure comprising at least two bilayers, each bilayer comprising a nanoplatelet layer and a polymer layer;
- wherein the nanoplatelets have an average width less than or equal to Wp,max, wherein Wp,max is a maximum platelet width that is determined according to the formula:
- w
- p
- ,
- max
- =
- 2
-
- r
- .
- arccos
-
- (
- r
- r
- +
- Δ
-
-
- d
- polymer
- )
- (
- 1
- )
- wherein r is the fiber diameter in nanometers, and Δdpolymer is half the thickness of the polymer layer.
A coated fiber comprising a fiber and a coating, wherein the coating comprises nanoplatelets and a polymer, wherein the coating has a layered structure comprising at least two bilayers, each bilayer comprising a nanoplatelet layer and a polymer layer;
- wherein the fiber has a diameter of 5-10 μm, and wherein the nanoplatelets have an average width of no more than 200 nm and an aspect ratio of 7 to 12.
A coated fiber comprising a fiber and a coating, wherein the coating comprises nanoplatelets and a polyelectrolyte, wherein the coating has a layered structure comprising at least two bilayers, each bilayer comprising a nanoplatelet layer and a polyelectrolyte layer;
- wherein the coating comprises a volume ratio of nanoplatelets to polyelectrolyte of 80:20 to about 95:5 and a nanoplatelet aspect ratio of 8 to 10, and wherein the nanoplatelets have a size distribution of the width of the nanoplatelets with a standard deviation of less than about 40%.
A method of preparing a coated fiber, comprising the steps of:
- (a) providing a fiber;
- and
- (b) coating the fiber with a coating comprising nanoplatelets and a polymer, wherein the fiber is coated with at least two bilayers, each bilayer comprising a nanoplatelet layer and a polymer layer, wherein the nanoplatelets have an average width less than or equal to Wp,max, wherein Wp,max is a maximum platelet width that is determined according to the formula:
- w
- p
- ,
- max
- =
- 2
-
- r
- ·
- arc
-
-
- cos
-
- (
- r
- r
- *
- Δ
-
-
- d
- polymer
- )
- (
- 1
- )
- wherein r is the fiber diameter in nanometers, and Δdpolymer is half the thickness of the polymer layer.
Dependencies are inferred from the claim text.