CN114149716A - Environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating - Google Patents
Environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating Download PDFInfo
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- CN114149716A CN114149716A CN202111676046.1A CN202111676046A CN114149716A CN 114149716 A CN114149716 A CN 114149716A CN 202111676046 A CN202111676046 A CN 202111676046A CN 114149716 A CN114149716 A CN 114149716A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G83/00—Macromolecular compounds not provided for in groups C08G2/00 - C08G81/00
- C08G83/001—Macromolecular compounds containing organic and inorganic sequences, e.g. organic polymers grafted onto silica
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
Abstract
The invention provides an environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating, which comprises the following components in parts by weight: 40-60 parts of acrylic resin, 5-15 parts of chitosan-titanium dioxide-carbon nanotube composite, 0.5-1 part of dispersing agent, 0.5-3 parts of film forming agent, 0.1-0.5 part of wetting agent, 0.1-0.5 part of defoaming agent, 0.1-1 part of flatting agent, 0.5-2 parts of adhesion promoter and 0.1-0.5 part of mildew preventive; the chitosan-titanium dioxide-carbon nanotube composite is prepared from a chitosan-titanium dioxide composite and a carbon nanotube. The coating can effectively absorb formaldehyde and convert the formaldehyde into a nontoxic substance and has excellent acid-base corrosion resistance.
Description
Technical Field
The invention relates to the field of coatings, in particular to an environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating.
Background
In recent years, with the improvement of living standard of people, people pursue the living idea of environmental protection, green and health, and become the living target of modern people. However, indoor decoration materials often generate free formaldehyde, and the content of formaldehyde in newly decorated houses is often out of standard. When a human body is in an environment with excessive formaldehyde for a long time, serious damage can be caused to health, and how to effectively reduce the content of formaldehyde in indoor air becomes a research hotspot. Conventional methods for purifying formaldehyde include window ventilation, plant absorption, activated carbon adsorption, etc., but these methods are inefficient or not effective for removing formaldehyde for a long period of time. The acid and alkali resistance of the coating is important related to the protective performance of the coating on the base material. Therefore, the development of the industrial coating which has low VOC release amount and certain formaldehyde resistance and acid and alkali resistance has wide market prospect.
Disclosure of Invention
The invention aims to provide an environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating which can effectively absorb formaldehyde and convert the formaldehyde into a non-toxic substance and has excellent acid-alkali corrosion resistance.
According to a first aspect of the invention, an environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating is provided, which comprises the following components in parts by weight: 40-60 parts of acrylic resin, 5-15 parts of chitosan-titanium dioxide-carbon nanotube composite, 0.5-1 part of dispersing agent, 0.5-3 parts of film forming agent, 0.1-0.5 part of wetting agent, 0.1-0.5 part of defoaming agent, 0.1-1 part of flatting agent, 0.5-2 parts of adhesion promoter and 0.1-0.5 part of mildew preventive;
the chitosan-titanium dioxide-carbon nanotube composite is prepared from a chitosan-titanium dioxide composite and a carbon nanotube.
Preferably, the chitosan-titanium dioxide composite is prepared by the following steps:
the method comprises the following steps: adding tetrabutyl titanate into a reaction kettle filled with absolute ethyl alcohol, uniformly stirring, sequentially adding acetic acid and a deionized water solution of chitosan, stirring and reacting for 1-2 h to obtain a mixed solution 1, putting the mixed solution 1 into an oven, heating at 200-250 ℃ for 10-12 h, centrifuging, washing, and drying to obtain a precipitate;
step two: and (3) heating the precipitate to 120 ℃ at the heating rate of 5 ℃/min, calcining, and keeping the temperature for 2-3 h to obtain the chitosan-titanium dioxide composite.
Preferably, the chitosan-titanium dioxide-carbon nanotube composite is prepared by the following steps:
the method comprises the following steps: adding the carbon nano tube into the mixed acid under the ultrasonic condition, reacting for 1-5 h at 20-100 ℃, washing with water, filtering, and freeze-drying to obtain a carbon nano tube active intermediate;
step two: dissolving the carbon nano tube active intermediate in deionized water containing a catalyst, adding a solution of the chitosan-titanium dioxide compound, reacting at the temperature of 0-50 ℃ for 10-30 h, adding absolute ethyl alcohol, centrifuging, and drying the precipitate to obtain the chitosan-titanium dioxide-carbon nano tube compound.
Preferably, the chitosan is at least one of chitosan, carboxymethyl chitosan, hydroxyethyl chitosan and hydroxypropyl chitosan.
Preferably, the anti-settling agent is at least one of hydrophilic bentonite, silicate and montmorillonite.
Preferably, the leveling agent is at least one of polyvinyl butyral and diacetone alcohol.
Preferably, the carbon nanotubes are multi-walled carbon nanotubes.
Preferably, the particle size of the chitosan-titanium dioxide composite is 300-1000 nm.
Preferably, the acrylic resin is a mixture of butyl acrylate, methyl acrylate, 4-hydroxybutyl methacrylate and acrylic acid.
Preferably, the environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating further comprises 2-5 parts of diatomite.
Preferably, the environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating further comprises 1-2 parts of nano bismuth oxychloride.
According to another aspect of the invention, a preparation method of the environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating is provided, which comprises the following steps:
the method comprises the following steps: stirring acrylic resin, a dispersing agent, a wetting agent, a defoaming agent, a flatting agent and an adhesion promoter for 1-2 hours at the rotating speed of 700-800 r/min to obtain a first feed liquid;
step two: dissolving the chitosan-titanium dioxide-carbon nanotube composite in water, uniformly dispersing by ultrasonic, adding the first feed liquid, and continuously stirring for 0.5-1 h;
step three: adding a film forming agent and a mildew preventive, and adding ammonia water under the stirring condition to adjust the pH value to be neutral, thereby obtaining the environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating.
Compared with the prior art, the invention has the following beneficial effects: the chitosan, the titanium dioxide and the carbon nano tube are compounded and grafted together in a chemical mode to obtain a chitosan-titanium dioxide-carbon nano tube compound which has strong photocatalytic performance and is added into a coating system as a filler to obtain the environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating with greatly improved comprehensive performance. The titanium dioxide has a photocatalytic function and can combine oxygen molecules and water molecules to form OH and O with strong oxidizing property2、H2O2Further catalyzing formaldehyde to be oxidized and decomposed to generate CO2And water. The chitosan has a large amount of active amino and hydroxyl and generates a chitosan-titanium dioxide compound with a porous structure through a sol-gel method reaction, so that the specific surface area of the titanium dioxide is greatly increased, and the photocatalytic efficiency of the titanium dioxide is enhanced. The amino group in the chitosan structure can also react with formaldehyde to convert the formaldehyde into a non-toxic and harmless substance. And further, grafting the carbon nano tube with chitosan to generate a chitosan-titanium dioxide-carbon nano tube compound, wherein the carbon nano tube compound has stronger adsorption performance, adsorbs formaldehyde in the air and slowly releases the formaldehyde so that the titanium dioxide and the chitosan can have sufficient time to oxidize, decompose and convert the formaldehyde into nontoxic substances. The carbon nano tube, the titanium dioxide and the chitosan are grafted, so that the agglomeration of the carbon nano tube and the titanium dioxide in the coating is effectively avoided. The linear and dot-shaped structures of the carbon nano tube and the titanium dioxide enhance the compactness of the coating, and the carbon nano tube and the titanium dioxide are uniformly dispersed in the coating, so that the corrosion resistance, the acid and alkali resistance of the coating are enhanced.
Detailed Description
The present invention is described in detail below with reference to specific examples, which will assist those skilled in the art in further understanding the present invention, but are not intended to limit the present invention in any way. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the spirit of the invention, and all such changes and modifications fall within the scope of the invention.
The chitosan-titania-carbon nanotube composite in the following embodiment is prepared from a chitosan-titania composite in the following manner:
(1) preparation of Chitosan-Titania composite
The method comprises the following steps: adding 10ml of tetrabutyl titanate into a reaction kettle containing 20ml of absolute ethyl alcohol, uniformly stirring, sequentially adding 18ml of acetic acid and 200mg of chitosan deionized water solution, stirring and reacting for 1.5h to obtain a mixed solution 1, heating the mixed solution 1 in an oven at 200-250 ℃ for 10h, centrifuging, washing and drying to obtain a precipitate;
step two: and (3) heating the precipitate to 120 ℃ at the heating rate of 5 ℃/min, calcining, and keeping the temperature for 3h to obtain the chitosan-titanium dioxide composite.
(2) Preparation of Chitosan-Titania-carbon nanotube composite
The method comprises the following steps: adding the carbon nano tube into mixed acid (concentrated nitric acid: concentrated sulfuric acid: 1) under the ultrasonic condition, reacting for 1-5 h at 20-100 ℃, washing with water, filtering, and freeze-drying to obtain a carbon nano tube active intermediate;
step two: dissolving the carbon nano tube active intermediate in deionized water containing a catalyst, adding a solution of the chitosan-titanium dioxide compound, reacting at the temperature of 50 ℃ for 20 hours, adding absolute ethyl alcohol, centrifuging, and drying the precipitate to obtain the chitosan-titanium dioxide-carbon nano tube compound.
Example 1
The embodiment provides an environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating, which comprises the following components in parts by weight: 10 parts of butyl acrylate, 10 parts of methyl acrylate, 20 parts of acrylic acid, 5 parts of chitosan-titanium dioxide-carbon nanotube compound, 2 parts of diatomite, 1 part of nano bismuth oxychloride dispersing agent, 0.5 part of film forming agent, 0.3 part of wetting agent, 0.5 part of defoaming agent, 0.5 part of flatting agent, 1 part of adhesion promoter and 0.1 part of mildew preventive.
The environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating is prepared by the following steps:
the method comprises the following steps: stirring 10 parts of butyl acrylate, 10 parts of methyl acrylate, 20 parts of acrylic acid, 0.5 part of dispersing agent, 0.3 part of wetting agent, 0.5 part of defoaming agent, 0.5 part of flatting agent and 1 part of adhesion promoter for 1-2 hours under the condition that the rotating speed is 700-800 r/min to obtain first feed liquid;
step two: dissolving 5 parts of chitosan-titanium dioxide-carbon nanotube compound, 2 parts of diatomite and 1 part of nano bismuth oxychloride in water, uniformly dispersing by ultrasonic, adding the first feed liquid, and continuously stirring for 1 hour;
step three: adding 2 parts of film forming agent and 0.5 part of mildew preventive, and adding ammonia water under stirring to adjust the pH value to be neutral, thereby obtaining the environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating.
Example 2
The embodiment provides an environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating, which comprises the following components in parts by weight: 15 parts of butyl acrylate, 10 parts of methyl acrylate, 20 parts of acrylic acid, 15 parts of 4-hydroxybutyl methacrylate, 15 parts of chitosan-titanium dioxide-carbon nanotube composite, 5 parts of diatomite, 2 parts of nano bismuth oxychloride, 1 part of dispersing agent, 3 parts of film forming agent, 0.5 part of wetting agent, 0.5 part of defoaming agent, 1 part of flatting agent, 2 parts of adhesion promoter and 0.5 part of mildew preventive.
The environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating is prepared by the following steps:
the method comprises the following steps: stirring 15 parts of butyl acrylate, 10 parts of methyl acrylate, 20 parts of acrylic acid, 15 parts of 4-hydroxybutyl methacrylate, 1 part of dispersing agent, 0.5 part of wetting agent, 0.5 part of defoaming agent, 1 part of flatting agent and 2 parts of adhesion promoter for 1-2 hours at the rotating speed of 700-800 r/min to obtain a first feed liquid;
step two: dissolving 15 parts of chitosan-titanium dioxide-carbon nanotube composite, 5 parts of diatomite and 2 parts of nano bismuth oxychloride in water, uniformly dispersing by ultrasonic, adding the first feed liquid, and continuously stirring for 1 hour;
step three: adding 4 parts of film forming agent and 0.5 part of mildew preventive, and adding ammonia water under stirring to adjust the pH value to be neutral, thereby obtaining the environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating.
Example 3
The embodiment provides an environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating, which comprises the following components in parts by weight: 20 parts of butyl acrylate, 10 parts of methyl acrylate, 20 parts of acrylic acid, 10 parts of chitosan-titanium dioxide-carbon nanotube compound, 3 parts of diatomite, 1.5 parts of nano bismuth oxychloride dispersant, 0.6 part of dispersant, 2 parts of film-forming agent, 0.3 part of wetting agent, 0.4 part of defoaming agent, 0.8 part of flatting agent, 1 part of adhesion promoter and 0.4 part of mildew preventive.
The environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating is prepared by the following steps:
the method comprises the following steps: stirring 20 parts of butyl acrylate, 10 parts of methyl acrylate, 20 parts of acrylic acid, 10 parts of 4-hydroxybutyl methacrylate, 0.6 part of dispersing agent, 0.3 part of wetting agent, 0.4 part of defoaming agent, 0.8 part of flatting agent and 1 part of adhesion promoter for 1-2 hours at the rotating speed of 700-800 r/min to obtain a first feed liquid;
step two: dissolving 10 parts of chitosan-titanium dioxide-carbon nanotube compound, 3 parts of diatomite and 1.5 parts of nano bismuth oxychloride in water, uniformly dispersing by ultrasonic, adding the first feed liquid, and continuously stirring for 1 hour;
step three: adding 2 parts of film forming agent and 0.4 part of mildew preventive, and adding ammonia water under stirring to adjust the pH value to be neutral, thereby obtaining the environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating.
Comparative example 1
The embodiment provides an environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating, which comprises the following components in parts by weight: 20 parts of butyl acrylate, 10 parts of methyl acrylate, 20 parts of acrylic acid, 3 parts of chitosan, 3 parts of titanium dioxide, 4 parts of carbon nano tube, 3 parts of diatomite, 1.5 parts of nano bismuth oxychloride, 1 part of dispersant, 0.6 part of dispersant, 2 parts of film-forming agent, 0.3 part of wetting agent, 0.4 part of defoaming agent, 0.8 part of flatting agent, 1 part of adhesion promoter and 0.4 part of mildew preventive.
The environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating is prepared by the following steps:
the method comprises the following steps: stirring 20 parts of butyl acrylate, 10 parts of methyl acrylate, 20 parts of acrylic acid, 10 parts of 4-hydroxybutyl methacrylate, 0.6 part of dispersing agent, 0.3 part of wetting agent, 0.4 part of defoaming agent, 0.8 part of flatting agent and 1 part of adhesion promoter for 1-2 hours at the rotating speed of 700-800 r/min to obtain a first feed liquid;
step two: dissolving 3 parts of chitosan, 3 parts of titanium dioxide, 4 parts of carbon nano tube, 3 parts of diatomite and 1.5 parts of nano bismuth oxychloride in water, ultrasonically dispersing uniformly, adding the first feed liquid, and continuously stirring for 1 hour;
step three: adding 2 parts of film forming agent and 0.4 part of mildew preventive, and adding ammonia water under stirring to adjust the pH value to be neutral, thereby obtaining the environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating.
Comparative example 2
The embodiment provides an environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating, which comprises the following components in parts by weight: 20 parts of butyl acrylate, 10 parts of methyl acrylate, 20 parts of acrylic acid, 5 parts of chitosan-titanium dioxide, 5 parts of carbon nano tube, 3 parts of diatomite, 1.5 parts of nano bismuth oxychloride, 1 part of dispersing agent, 0.6 part of dispersing agent, 2 parts of film forming agent, 0.3 part of wetting agent, 0.4 part of defoaming agent, 0.8 part of flatting agent, 1 part of adhesion promoter and 0.4 part of mildew preventive.
The environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating is prepared by the following steps:
the method comprises the following steps: stirring 20 parts of butyl acrylate, 10 parts of methyl acrylate, 20 parts of acrylic acid, 10 parts of 4-hydroxybutyl methacrylate, 0.6 part of dispersing agent, 0.3 part of wetting agent, 0.4 part of defoaming agent, 0.8 part of flatting agent and 1 part of adhesion promoter for 1-2 hours at the rotating speed of 700-800 r/min to obtain a first feed liquid;
step two: dissolving 5 parts of chitosan-titanium dioxide, 5 parts of carbon nano tube, 3 parts of diatomite and 1.5 parts of nano bismuth oxychloride in water, ultrasonically dispersing uniformly, adding the first feed liquid, and continuously stirring for 1 hour;
step three: adding 2 parts of film forming agent and 0.4 part of mildew preventive, and adding ammonia water under stirring to adjust the pH value to be neutral, thereby obtaining the environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating.
Comparative example 3
The comparative example is different from example 1 in that the chitosan-titania-carbon nanotube composite is not added, and the rest is the same as example 3.
Test example 1
The products of examples 1 to 3 and comparative examples 1 to 3 were subjected to a formaldehyde purification efficiency test and a formaldehyde purification efficiency durability test in accordance with the class I requirements stipulated by JC/T10742008 "indoor air purification function coating material purification function", and the results are shown in Table 1.
Test example 2
The products of examples 1 to 3 and comparative examples 1 to 3 were tested for free formaldehyde content and volatile organic compound content according to test methods B18582-2008 "limit of harmful substances in interior wall coating for interior decoration and finishing materials", and the results are shown in table 1.
TABLE 1 Formaldehyde resistance testing of the coatings
Test example 3
Acid and alkali resistance tests were carried out according to GB/T9274-1998 examples 1-3 and comparative examples 1-3.
| Item | Acid solution resistance | Alkali resistance |
| Example 1 | 720h, the paint film does not bubble and does not fall off | 720h, the paint film does not bubble and does not fall off |
| Example 2 | 720h, the paint film does not bubble and does not fall off | 720h, the paint film does not bubble and does not fall off |
| Example 3 | 720h, the paint film does not bubble and does not fall off | 720h, the paint film does not bubble and does not fall off |
| Test example 1 | Foaming | Foaming |
| Test example 2 | Foaming | Foaming |
| Test example 3 | Slight detachment | Slight detachment |
The test results show that the coating provided by the invention can effectively eliminate formaldehyde, has lasting acting force, and can keep good formaldehyde removal efficiency under the condition that formaldehyde is continuously volatilized for a long time. The paint provided by the invention has good acid resistance and alkali resistance, and cannot be corroded or shed after long-term use.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Variations or modifications to the above-described embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, all equivalent modifications or changes that can be made by those skilled in the art without departing from the spirit and technical idea of the present invention shall be covered by the claims of the present invention.
Claims (9)
1. The environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating is characterized by comprising the following components in parts by weight: 40-60 parts of acrylic resin, 5-15 parts of chitosan-titanium dioxide-carbon nanotube composite, 0.5-1 part of dispersing agent, 0.5-3 parts of film forming agent, 0.1-0.5 part of wetting agent, 0.1-0.5 part of defoaming agent, 0.1-1 part of flatting agent, 0.5-2 parts of adhesion promoter and 0.1-0.5 part of mildew preventive;
the chitosan-titanium dioxide-carbon nanotube composite is prepared from a chitosan-titanium dioxide composite and a carbon nanotube.
The chitosan-titanium dioxide composite is prepared by the following steps:
the method comprises the following steps: adding tetrabutyl titanate into a reaction kettle filled with absolute ethyl alcohol, uniformly stirring, sequentially adding acetic acid and a deionized water solution of chitosan, stirring and reacting for 1-2 h to obtain a mixed solution 1, heating the mixed solution 1 in an oven at 200-250 ℃ for 10-12 h, centrifuging, washing and drying to obtain a precipitate;
step two: and heating the precipitate to 120 ℃ at a heating rate of 5 ℃/min, calcining, and keeping the temperature for 2-3 h to obtain the chitosan-titanium dioxide composite.
2. The environment-friendly formaldehyde-resistant acid and alkali-resistant industrial coating as claimed in claim 1, wherein the chitosan-titanium dioxide-carbon nanotube composite is prepared by the following steps:
the method comprises the following steps: adding the carbon nano tube into the mixed acid under the ultrasonic condition, reacting for 1-5 h at 20-100 ℃, washing with water, filtering, and freeze-drying to obtain a carbon nano tube active intermediate;
step two: dissolving the carbon nano tube active intermediate in deionized water containing a catalyst, adding the solution of the chitosan-titanium dioxide compound, reacting at the temperature of 0-50 ℃ for 10-30 h, adding absolute ethyl alcohol, centrifuging, and drying the precipitate to obtain the chitosan-titanium dioxide-carbon nano tube compound.
3. The environment-friendly formaldehyde-resistant acid and alkali-resistant industrial coating as claimed in claim 2, wherein the chitosan is at least one of chitosan, carboxymethyl chitosan, hydroxyethyl chitosan and hydroxypropyl chitosan.
4. The environment-friendly formaldehyde-resistant acid-and-alkali-resistant industrial coating as claimed in claim 2, wherein the carbon nanotubes are multi-walled carbon nanotubes.
5. The environment-friendly formaldehyde-resistant acid-and-alkali-resistant industrial coating as claimed in claim 1, wherein the particle size of the chitosan-titanium dioxide composite is 300-1000 nm.
6. The environment-friendly formaldehyde-resistant acid-and-alkali-resistant industrial coating as claimed in claim 1, wherein the acrylic resin is a mixture of butyl acrylate, methyl acrylate, 4-hydroxybutyl methacrylate and acrylic acid.
7. The environment-friendly formaldehyde-resistant acid-and-alkali-resistant industrial coating as claimed in claim 1, further comprising 2-5 parts of diatomite.
8. The environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating as claimed in claim 7, further comprising 1-2 parts of nano bismuth oxychloride.
9. The preparation method of the environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating as claimed in claim 1, characterized by comprising the following steps:
the method comprises the following steps: stirring the acrylic resin, the dispersing agent, the wetting agent, the defoaming agent, the flatting agent and the adhesion promoter for 1-2 hours at the rotating speed of 700-800 r/min to obtain a first feed liquid;
step two: dissolving the chitosan-titanium dioxide-carbon nanotube composite in water, uniformly dispersing by ultrasonic, adding the first feed liquid, and continuously stirring for 0.5-1 h;
step three: and adding the film forming agent and the mildew preventive, and adding ammonia water under stirring to adjust the pH value to be neutral to obtain the environment-friendly formaldehyde-resistant acid-alkali-resistant industrial coating.
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| CN114988859A (en) * | 2022-06-11 | 2022-09-02 | 广东欧文莱陶瓷有限公司 | Ceramic sheet with heat conduction function |
| CN115678425A (en) * | 2022-10-30 | 2023-02-03 | 黄燕妹 | Nano antifouling fiber coating and preparation method thereof |
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