Carbon nanotube inorganic paint and usage method thereof

Abstract

The invention discloses a carbon nanotube inorganic paint and usage method thereof, and solves the problem of bad adhesive force of the prior inorganic paint on the metal surface. The carbon nanotube modified inorganic paint is used according to the invention, and the addition of the carbon nanotube is 0.2-3% of the inorganic paint by mass percent. According to the invention, using the carbon nanotube modified inorganic paint can substantially improve the adhesive force of the inorganic paint on the metal surface, and achieve the same improving effect of the inorganic paint adhesive force after sand-blast treatment or corrosion roughening treatment of the metal surface. The sand-blast treatment or corrosion roughening treatment is not needed on the metal surface, thereby substantially simplifying the construction difficulty.

Description

Technical field

[0001] The invention relates to the technical field of inorganic coating production, in particular to a carbon nanotube inorganic coating and a method of use thereof. Background technique

[0002] Inorganic coatings mainly refer to coatings prepared by using silicate and phosphate compounds as binders and adding various pigments, fillers, additives, and curing agents. Among them, silicate polymer compounds can be divided into alkali metal Silicate and silica sol. This kind of coating with inorganic binder as a film-forming substance has a low film-forming temperature, its coating film has excellent weather resistance, is very stable under the action of ultraviolet light, good heat resistance, non-combustible when exposed to fire, and good resistance Pollution, not easy to absorb dust, can maintain a bright decorative effect, no volatile organic compounds are generated in the production and use process, will not pollute the environment, rich in raw materials resou...

Examples

Embodiment 1

[0043] Pretreatment of carbon nanotubes:

[0044] (1) Swell the carbon nanotubes in 50℃ perchloric acid for 30h;

[0045] (2) Then add the mixture of carbon nanotubes and perchloric acid to 30% concentrated nitric acid with a mass concentration of 70°C for 2 hours; the volume ratio of concentrated nitric acid: perchloric acid is 1:3;

[0046] (3) Wash with water and filter to obtain treated carbon nanotubes, and then add the treated carbon nanotubes to a 0.5% sodium deoxycholate solution with a mass concentration of 0.5% by mass. The amount of treated carbon nanotubes is deoxycholic acid 5% of the mass of sodium solution, stir for 40min to obtain a suspension;

[0047] (4) The suspension is rapidly cooled to -10°C and freeze-dried for 30 hours under 10pa vacuum conditions.

[0048] The inorganic coating is a phosphate coating. For the formulation of the phosphate coating, please refer to Examples 1-3 of CN1618887A invention patent (published on May 25, 2005). The pre-treated carbon nan...

Embodiment 2

[0051] Pretreatment of carbon nanotubes:

[0052] (1) Swell the carbon nanotubes in 70℃ perchloric acid for 20 hours;

[0053] (2) Then add the mixture of carbon nanotubes and perchloric acid to 50% concentrated nitric acid with a mass concentration of 80°C for 1 hour; the volume ratio of concentrated nitric acid:perchloric acid is 1:3;

[0054] (3) Wash with water and filter to obtain treated carbon nanotubes, and then add the treated carbon nanotubes to a sodium deoxycholate solution with a mass concentration of 1.5%, and the amount of treated carbon nanotubes is deoxycholic acid 10% of the mass of sodium solution, stir for 20min to obtain a suspension;

[0055] (4) The suspension is rapidly cooled to -20°C and freeze-dried for 20 hours under 30pa vacuum conditions.

[0056] The inorganic paint is a phosphate paint (commercially available, Yangzhou Meitus Jinling Special Paint Co., Ltd., product name inorganic phosphate zinc-rich paint, model ET-98), and pre-treated carbon nanotubes ...

Embodiment 3

[0058] Carbon nanotube pretreatment:

[0059] (1) Swell the carbon nanotubes in 60℃ perchloric acid for 25h;

[0060] (2) Then add the mixture of carbon nanotubes and perchloric acid to 40% concentrated nitric acid with a mass concentration of 75°C for 1.5 hours; the volume ratio of concentrated nitric acid:perchloric acid is 1:3;

[0061] (3) Wash with water and filter to obtain treated carbon nanotubes, and then add the treated carbon nanotubes to a solution of sodium deoxycholate with a mass concentration of 1%. The amount of treated carbon nanotubes is deoxycholic acid 7% of the mass of sodium solution, stir for 30min to obtain a suspension;

[0062] (4) The suspension is rapidly cooled to -15°C, freeze-dried for 25 hours under 20pa vacuum conditions.

[0063] The inorganic coating is an alkali metal silicate coating (commercially available, Xinhuayan Refractory Insulation Materials Co., Ltd., product name silicate coating), and the pre-treated carbon is added during or after the p...

Technical field

[0001] The invention relates to the technical field of inorganic coating production, in particular to a carbon nanotube inorganic coating and a method of use thereof. Background technique

[0002] Inorganic coatings mainly refer to coatings prepared by using silicate and phosphate compounds as binders and adding various pigments, fillers, additives, and curing agents. Among them, silicate polymer compounds can be divided into alkali metal Silicate and silica sol. This kind of coating with inorganic binder as a film-forming substance has a low film-forming temperature, its coating film has excellent weather resistance, is very stable under the action of ultraviolet light, good heat resistance, non-combustible when exposed to fire, and good resistance Pollution, not easy to absorb dust, can maintain a bright decorative effect, no volatile organic compounds are generated in the production and use process, will not pollute the environment, rich in raw materials resou...

Examples

Embodiment 1

[0043] Pretreatment of carbon nanotubes:

[0044] (1) Swell the carbon nanotubes in 50℃ perchloric acid for 30h;

[0045] (2) Then add the mixture of carbon nanotubes and perchloric acid to 30% concentrated nitric acid with a mass concentration of 70°C for 2 hours; the volume ratio of concentrated nitric acid: perchloric acid is 1:3;

[0046] (3) Wash with water and filter to obtain treated carbon nanotubes, and then add the treated carbon nanotubes to a 0.5% sodium deoxycholate solution with a mass concentration of 0.5% by mass. The amount of treated carbon nanotubes is deoxycholic acid 5% of the mass of sodium solution, stir for 40min to obtain a suspension;

[0047] (4) The suspension is rapidly cooled to -10°C and freeze-dried for 30 hours under 10pa vacuum conditions.

[0048] The inorganic coating is a phosphate coating. For the formulation of the phosphate coating, please refer to Examples 1-3 of CN1618887A invention patent (published on May 25, 2005). The pre-treated carbon nan...

Embodiment 2

[0051] Pretreatment of carbon nanotubes:

[0052] (1) Swell the carbon nanotubes in 70℃ perchloric acid for 20 hours;

[0053] (2) Then add the mixture of carbon nanotubes and perchloric acid to 50% concentrated nitric acid with a mass concentration of 80°C for 1 hour; the volume ratio of concentrated nitric acid:perchloric acid is 1:3;

[0054] (3) Wash with water and filter to obtain treated carbon nanotubes, and then add the treated carbon nanotubes to a sodium deoxycholate solution with a mass concentration of 1.5%, and the amount of treated carbon nanotubes is deoxycholic acid 10% of the mass of sodium solution, stir for 20min to obtain a suspension;

[0055] (4) The suspension is rapidly cooled to -20°C and freeze-dried for 20 hours under 30pa vacuum conditions.

[0056] The inorganic paint is a phosphate paint (commercially available, Yangzhou Meitus Jinling Special Paint Co., Ltd., product name inorganic phosphate zinc-rich paint, model ET-98), and pre-treated carbon nanotubes ...

Embodiment 3

[0058] Carbon nanotube pretreatment:

[0059] (1) Swell the carbon nanotubes in 60℃ perchloric acid for 25h;

[0060] (2) Then add the mixture of carbon nanotubes and perchloric acid to 40% concentrated nitric acid with a mass concentration of 75°C for 1.5 hours; the volume ratio of concentrated nitric acid:perchloric acid is 1:3;

[0061] (3) Wash with water and filter to obtain treated carbon nanotubes, and then add the treated carbon nanotubes to a solution of sodium deoxycholate with a mass concentration of 1%. The amount of treated carbon nanotubes is deoxycholic acid 7% of the mass of sodium solution, stir for 30min to obtain a suspension;

[0062] (4) The suspension is rapidly cooled to -15°C, freeze-dried for 25 hours under 20pa vacuum conditions.

[0063] The inorganic coating is an alkali metal silicate coating (commercially available, Xinhuayan Refractory Insulation Materials Co., Ltd., product name silicate coating), and the pre-treated carbon is added during or after the p...