Superhydrophobic coating, superhydrophobic foam concrete, and preparation methods thereof

Patent metadata

Field	Value
Publication number	US-11312866-B2
Application number	US-202016850141-A
Country	US
Kind code	B2
Filing date	Apr 16, 2020
Priority date	Dec 30, 2019
Publication date	Apr 26, 2022
Grant date	Apr 26, 2022

Abstract

A superhydrophobic coating is provided and contains organosilane, an inorganic nanomaterial, and an emulsifying agent. A mass proportion of the components is controlled, so that the superhydrophobic coating can form a micro-nano mixed microstructure inside foam concrete. The organosilane first forms dense hydrophobic surface layers on the surface and in inner pores of the foam concrete, and the nanomaterial forms uniformly distributed nano-bulges on the hydrophobic surface layers formed by the silane. The superhydrophobic performance of the foam concrete can be effectively improved by combining the two microstructures. The foam concrete exhibits excellent superhydrophobic performance.

First claim

What is claimed is:

1. A superhydrophobic coating, comprising the following components in parts by weight:
40-70 parts of organosilane,
10-40 parts of inorganic nanomaterial,
5-15 parts of emulsifying agent, and
10-50 parts of water,
wherein a particle size of the inorganic nanomaterial is 80-300 nm.

2. The superhydrophobic coating of claim 1 , wherein the organosilane comprises at least one of: triethoxyvinylsilane, isobutyltriethoxysilane, triethoxyoctylsilane, γ-aminopropyl triethoxysilane, and N-(2-aminoethyl)-3-aminopropyltriethoxysilane.

3. The superhydrophobic coating of claim 1 , wherein the inorganic nanomaterial comprises at least one of: silica, alumina, γ-alumina, titanium oxide, graphene, oxidized graphene, silica sol, alumina sol, and titanium sol.

4. The superhydrophobic coating of claim 1 , wherein the emulsifying agent comprises at least one of Peregal O, Span 80, Span 60, Tween 60, and Tween 80.

5. A superhydrophobic foam concrete, comprising:
foam concrete, and
a superhydrophobic coating, which includes the following components in parts by weight: 40-70 parts of organosilane, 10-40 parts of inorganic nanomaterial, 5-15 parts of emulsifying agent, and 10-50 parts of water, wherein a particle size of the inorganic nanomaterial is 80-300 nm,
wherein a coating amount of the superhydrophobic coating is 600-1500 g/m 2 .

6. A preparation method for making a superhydrophobic coating, which includes the following components in parts by weight: 40-70 parts of organosilane, 10-40 parts of inorganic nanomaterial, 5-15 parts of emulsifying agent, and 10-50 parts of water, the method comprising the following steps:
conducting first mixing on the organosilane, the emulsifying agent, and the water to obtain a silane-water emulsion; and
conducting second mixing on the inorganic nanomaterial, which defines a particle size of 80-300 nm, and the silane-water emulsion to obtain the superhydrophobic coating.

7. The preparation method of claim 6 , wherein the organosilane comprises at least one of: triethoxyvinylsilane, isobutyltriethoxysilane, triethoxyoctylsilane, γ-aminopropyl triethoxysilane, and N-(2-aminoethyl)-3-aminopropyltriethoxysilane.

8. The preparation method of claim 7 , wherein a temperature of the first mixing and the second mixing is independently 40-70° C.; a time for the first mixing is 110-330 min; and a time for the second mixing is 20-60 min.

9. The preparation method of claim 8 , wherein the first mixing and the second mixing are independently conducted under stirring, and a stirring speed is independently 3000-8000 r/min.

10. The preparation method of claim 6 , wherein the inorganic nanomaterial comprises at least one of: silica, alumina, γ-alumina, titanium oxide, graphene, oxidized graphene, silica sol, alumina sol, and titanium sol.

11. The preparation method of claim 10 , wherein a temperature of the first mixing and the second mixing is independently 40-70° C.; a time for the first mixing is 110-330 min; and a time for the second mixing is 20-60 min.

12. The preparation method of claim 11 , wherein the first mixing and the second mixing are independently conducted under stirring, and a stirring speed is independently 3000-8000 r/min.

13. The preparation method of claim 6 , wherein the emulsifying agent comprises at least one of Peregal O, Span 80, Span 60, Tween 60, and Tween 80.

14. The preparation method of claim 13 , wherein a temperature of the first mixing and the second mixing is independently 40-70° C.; a time for the first mixing is 110-330 min; and a time for the second mixing is 20-60 min.

15. The preparation method of claim 14 , wherein the first mixing and the second mixing are independently conducted under stirring, and a stirring speed is independently 3000-8000 r/min.

16. The preparation method of claim 6 , wherein a temperature of the first mixing and the second mixing is independently 40-70° C.; a time for the first mixing is 110-330 min; and a time for the second mixing is 20-60 min.

17. The preparation method of claim 16 , wherein the first mixing and the second mixing are independently conducted under stirring, and a stirring speed is independently 3000-8000 r/min.

18. The preparation method of claim 6 , wherein the first mixing and the second mixing are independently conducted under stirring, and a stirring speed is independently 3000-8000 r/min.

19. The preparation method of claim 6 , wherein the method is further used to prepare a superhydrophobic foam concrete, and the method further comprises:
coating the superhydrophobic coating onto foam concrete with a coating amount of 600-1500 g/m 2 to form the superhydrophobic foam concrete.

20. The preparation method of claim 19 , further comprising:
coating the superhydrophobic coating on a surface of the foam concrete, and conducting standing to obtain the superhydrophobic foam concrete.

Assignees

• Univ Qingdao Technology

Inventors

• Geng Yongjuan
• Li Shaochun
• Hou Dongshuai
• Jin Zuquan
• Chen Xu
• Xiao Qilong
• Zhang Weifeng
• Lei Dongyi
• Gao Jing

Classifications

• C08K2003/2227

  of aluminium · CPC title

• C08K3/36

  Silica · CPC title

• C04B38/10

  by using foaming agents (C04B38/02 takes precedence){or by using mechanical means, e.g. adding preformed foam} · CPC title

• C04B41/52

  Multiple coating or impregnating {multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation} · CPC title

• C04B41/50

  with inorganic materials · CPC title