Corrosion-induced shape memory fiber, preparation method and application thereof

Patent metadata

Field	Value
Publication number	US-11459756-B2
Application number	US-201916683282-A
Country	US
Kind code	B2
Filing date	Nov 14, 2019
Priority date	Nov 14, 2018
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

The present invention relates to a corrosion-induced shape memory fiber, a preparation method and application thereof. The corrosion-induced shape memory fiber is composed of a core fiber and/or a core fiber with a corrosion-resistant coating, and a corrodible coating; the core fiber and/or the core fiber with the corrosion-resistant coating are in a tensile stress state along the length of the corrosion-induced shape memory fiber; the corrodible coating is in a compressive stress state along the length of the corrosion-induced shape memory fiber; the core fiber and/or the core fiber with the corrosion-resistant coating and the corrodible coating are in a tensile-compressive equilibrium state along the length of the corrosion-induced shape memory fiber; and the corrodible coating is coated outside the core fiber and/or the core fiber with the corrosion-resistant coating.

First claim

What is claimed is:

1. A corrosion-induced shape memory fiber, wherein the corrosion-induced shape memory fiber is composed of a core fiber and/or a core fiber with a corrosion-resistant coating, and a corrodible coating; the core fiber and/or the core fiber with the corrosion-resistant coating are in a tensile stress state along the length of the corrosion-induced shape memory fiber; the corrodible coating is in a compressive stress state along the length of the corrosion-induced shape memory fiber; the core fiber and/or the core fiber with the corrosion-resistant coating and the corrodible coating are in a tensile-compressive equilibrium state along the length of the corrosion-induced shape memory fiber; and the corrodible coating is coated outside the core fiber and/or the core fiber with the corrosion-resistant coating.

2. The corrosion-induced shape memory fiber according to claim 1 , wherein:
in an equivalent corrosive environment, the corrodible coating has a higher corrosion rate than the core fiber; and/or, in an equivalent corrosive environment, the corrodible coating has the higher corrosion rate than the core fiber with the corrosion-resistant coating.

3. The corrosion-induced shape memory fiber according to claim 1 , wherein the corrosion-induced shape memory fiber comprises the core fiber and the corrodible coating, and the core fiber is partially or entirely coated with the corrodible coating; or
the corrosion-induced shape memory fiber comprises the corrosion-resistant coating, the core fiber, and the corrodible coating; the core fiber is partially or entirely coated with the corrosion-resistant coating; when the core fiber is partially or entirely coated with the corrosion-resistant coating, a obtained material is defined as A; the surface of the A is partially or entirely coated with the corrodible coating; or
the corrosion-induced shape memory fiber comprises the core fiber, the corrodible coating, and the corrosion-resistant coating; the core fiber is coated with the corrodible coating; the corrodible coating is partially coated with the corrosion-resistant coating; or
the corrosion-induced shape memory fiber comprises the core fiber and the corrodible coating; the core fiber is partially or entirely coated with the corrodible coating; a partial position outside the core fiber comprises an end portion of the core fiber; when the end portion of the core fiber is coated with the corrodible coating, the corrodible coating at the end portion is also coated with the corrosion-resistant coating; or
the corrosion-induced shape memory fiber comprises the corrosion-resistant coating, the core fiber, and the corrodible coating; the core fiber is partially or entirely coated with the corrosion-resistant coating; when the core fiber is partially or entirely coated with the corrosion-resistant coating, a obtained material is defined as A; the surface of the A is partially or entirely coated with the corrodible coating, and when an end portion of the A is coated with the corrodible coating, the corrodible coating at the end portion is also coated with the corrosion-resistant coating;
wherein the core fiber and/or the core fiber with the corrosion-resistant coating are in the tensile stress state along the length of the fiber; the corrodible coating is in the compressive stress state along the length of the fiber;
in the equivalent corrosive environment, the corrodible coating has the higher corrosion rate than the core fiber; and/or, in the equivalent corrosive environment, the corrodible coating has the higher corrosion rate than the core fiber with the corrosion-resistant coating.

4. The corrosion-induced shape memory fiber according to claim 1 , wherein the core fiber is selected from at least one of an inorganic fiber and a polymer fiber; and the core fiber has an equivalent diameter of 20 mm or less.

5. The corrosion-induced shape memory fiber according to claim 4 , wherein:
the inorganic fiber is selected from at least one of carbon fiber, glass fiber, mineral fiber, basalt fiber, ceramic fiber, and metal fiber; the metal fiber is selected from at least one of steel fiber, plated M steel fiber, stainless steel fiber, copper alloy fiber, titanium alloy fiber, and nickel alloy fiber; the M is selected from at least one of copper, nickel, chromium, tin, cadmium, and silver elements;
the polymer fiber is selected from at least one of polypropylene fiber, polyacrylonitrile fiber, polyvinyl alcohol fiber, polyethylene fiber, and aramid fiber.

6. The corrosion-induced shape memory fiber according to claim 1 , wherein the core fiber has the equivalent diameter of 5 mm or less.

7. The corrosion-induced shape memory fiber according to claim 1 , wherein a material of the corrosion-resistant coating is selected from at least one of copper, nickel, chromium, cadmium, silver, and gold elements.

8. A method for using the corrosion-induced shape memory fiber according to claim 1 , comprising:
using the corrosion-induced shape memory fiber in concrete or in a fiber reinforced resin composite;
when the corrosion-induced shape memory fiber is used in the concrete, the corrosion-induced shape memory fiber is anchored in the concrete, and a corrosion driving condition is a use environment of the concrete.

9. The method for using the corrosion-induced shape memory fiber according to claim 8 , wherein 0.01-20 v % of the corrosion-induced shape memory fiber is used in the concrete.

Assignees

• Univ Qingdao Technology
• Wang Ziguo

Inventors

• Wang Ziguo
• Sun Yuyan
• Wang Ziliang

Classifications

• C04B20/0068

  Composite fibres, e.g. fibres with a core and sheath of different material · CPC title

• C04B14/42

  Glass · CPC title

• C04B20/1062

  Metals · CPC title

• C04B20/12 Primary

  Multiple coating or impregnating · CPC title

• C04B2111/26

  Corrosion of reinforcement resistance · CPC title