CN115340322A - Shell powder-based light sound insulation exterior wall coating and preparation method thereof - Google Patents
Shell powder-based light sound insulation exterior wall coating and preparation method thereof Download PDFInfo
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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Abstract
The invention discloses a shell powder-based light sound insulation exterior wall coating and a preparation method thereof, wherein the shell powder-based light sound insulation exterior wall coating comprises the following raw materials in parts by mass: 50-70 parts of modified shell powder, 30-40 parts of modified fly ash, 5-10 parts of polystyrene hollow microspheres, 5-10 parts of silica aerogel, 0.5-1 part of flame retardant, 5-10 parts of self-repairing agent, 1-2 parts of N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, 25-40 parts of composite resin emulsion and 20-25 parts of nano alumina sol. The modified shell powder and the modified fly ash are used as rigid framework materials to prepare the exterior wall coating, and the prepared coating has the advantages of light weight, sound insulation, noise reduction, high bonding strength, excellent leveling property, durability, weather resistance and the like, and is suitable for different extreme conditions. In a humid environment, water is used as an exciting agent, the crack is repaired by utilizing the curing crystallization reaction of a self-repairing agent, meanwhile, in a high-temperature environment, the free epoxy group in the composite resin emulsion and the amino group in the silane generate a ring-opening crosslinking reaction, and the silane and the inorganic material form a chemical bond, so that the stability is improved.
Description
Technical Field
The invention belongs to the field of exterior wall coatings, and particularly relates to a shell powder-based light sound insulation exterior wall coating and a preparation method thereof.
Background
The shell powder biological coating is prepared by taking natural shell powder as a raw material through grinding and a special process, but the shell powder coating generally has the defects of low bonding strength, no leveling property and the like, is not suitable for extreme environments, is easy to peel and crack particularly in a humid environment, and has poor durability and weather resistance and high later-stage maintenance cost. Meanwhile, with the improvement of modern living standard, the demand of people on living quality is continuously improved, and the indoor quiet degree is one of important indexes influencing the living quality, so how to improve the sound insulation and noise reduction performance of the exterior wall coating is an urgent technical problem to be solved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the shell powder-based light sound-insulation exterior wall coating and the preparation method thereof.
The technical scheme of the invention is summarized as follows:
the shell powder-based light sound-insulation exterior wall coating comprises the following raw materials in parts by mass:
preferably, the preparation method of the modified shell powder comprises the following steps: placing the shell powder into 0.1-0.5mol/L HCl solution, stirring for 10-30min, then dropwise adding 0.4-1mol/LHF solution, controlling the dosage ratio of the shell powder, the HCl solution and the HF solution to be 1g.
Preferably, the preparation method of the modified fly ash comprises the following steps: putting the fly ash into 0.1-0.5mol/LHCl solution, stirring for 10-30min, then dropwise adding 0.4-1mol/LHF solution, controlling the dosage ratio of the shell powder, the HCl solution and the HF solution to be 1g/5mL/2mL, continuously stirring for 10-30min, and then filtering, washing and drying to obtain the modified fly ash.
Preferably, the flame retardant is one or more of tributyl phosphate, tri (2-ethylhexyl) phosphate, tri (2-chloroethyl) phosphate, antimony trioxide, zinc borate and melamine polyphosphate.
Preferably, the self-repairing agent is prepared from sodium polyitaconate, barium nitride, zinc sulfate and copper sulfate according to the weight ratio of 1: (0.6-1.2): (0.5-1): (0.4-0.8) by mass ratio.
Preferably, the composite resin emulsion is prepared from organic silicon modified epoxy resin, vinyl acetate-ethylene copolymer and styrene-acrylic emulsion according to the weight ratio of 1: (0.4-0.8): (0.6-1.2) by mass ratio.
A shell powder-based light sound insulation exterior wall coating comprises the following steps:
s1: uniformly mixing the modified shell powder, the modified fly ash, the polystyrene hollow microspheres and the silica aerogel, adding the flame retardant and the self-repairing agent, and uniformly stirring to obtain a dry mixture;
s2: uniformly mixing the composite resin emulsion and the nano alumina sol, dropwise adding N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, and uniformly stirring to obtain a wet mixed material;
s3: and uniformly mixing the dry mixture and the wet mixture to obtain the shell powder-based light sound-insulation external wall coating.
The invention has the beneficial effects that:
1. the modified shell powder and the modified fly ash are used as rigid framework materials to prepare the exterior wall coating, and the prepared coating has the advantages of light weight, sound insulation, noise reduction, high bonding strength, excellent leveling property, durability, weather resistance and the like, and is suitable for different extreme conditions. In a humid environment, water is used as an exciting agent, the crack is repaired by utilizing the solidification and crystallization reaction of a self-repairing agent, meanwhile, in a high-temperature environment, the free epoxy group in the composite resin emulsion and the amino group in the N-beta- (aminoethyl) -gamma-aminopropyl trimethoxy silane generate a ring-opening crosslinking reaction, and meanwhile, the N-beta- (aminoethyl) -gamma-aminopropyl trimethoxy silane, the modified shell powder and the hydroxyl group on the surface of the modified fly ash form a silane siloxane bond or a hydrogen bond to form a high-strength network crosslinking system, so that the stability of the coating is greatly improved, and cracking and peeling are prevented.
2. The method firstly utilizes HCl solution to treat shell powder and fly ash to separate out part of Ca in the shell powder 2+ Part A1 of fly ash 3+ 、Fe 3+ 、Ca 2+ 、Mg 2+ The components are equal, so that the inorganic framework material is lighter and denserThe degree is lower, and further HF solution treatment is adopted to react with metal ions in a reaction system to form CaF on the surface of the shell powder 2 Forming A1F on the surface of fly ash 3 、FeF 3 、CaF 2 、MgF 2 And the acid and alkali resistant insoluble shell greatly improves the weather resistance and acid and alkali resistant performance of the coating, can also keep stable performance in an acid rain environment, and ensures that the outer wall coating does not crack or peel.
3. The invention greatly improves the sound insulation and noise reduction performance of the exterior wall coating, improves the heat insulation performance and makes the coating lighter by utilizing the characteristics of hollow and porous interiors of the modified shell powder, the modified fly ash, the polystyrene hollow microspheres and the silica aerogel.
4. The composite resin emulsion and the nano alumina sol are used as the adhesive, so that the adhesive strength of the exterior wall coating is greatly improved, the leveling property of the coating is improved, and meanwhile, the nano particles in the nano alumina sol are used as a repairing agent to fill up tiny pot holes in the coating, so that the coating is smooth and flat.
5. The self-repairing agent is prepared by compounding sodium polyitaconate, barium nitride, zinc sulfate and copper sulfate, wherein under the action of water excitation, barium nitride is hydrated to form barium hydroxide, and the barium hydroxide reacts with the sodium polyitaconate, the zinc sulfate and the copper sulfate to form insoluble crystals of barium polyitaconate/zinc/copper, zinc hydroxide/copper and barium sulfate, so that cracks and pits of a coating are repaired, and the self-repairing function is continuously exerted.
Drawings
FIG. 1 is a flow chart of a preparation method of the shell powder-based light sound-insulation external wall coating.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
The invention provides a shell powder-based light sound-insulation external wall coating which comprises the following raw materials in parts by mass:
the preparation method of the modified shell powder comprises the following steps: placing the shell powder in 0.1-0.5mol/LHCl solution, stirring for 10-30min, then dropwise adding 0.4-1mol/L HF solution, controlling the dosage ratio of the shell powder, the HCl solution and the HF solution to be 1g;
the preparation method of the modified fly ash comprises the following steps: placing the fly ash in 0.1-0.5mol/LHCl solution, stirring for 10-30min, then dropwise adding 0.4-1mol/L HF solution, controlling the dosage ratio of the shell powder, the HCl solution and the HF solution to be 1g;
the flame retardant is one or more of tributyl phosphate, tri (2-ethylhexyl) phosphate, tri (2-chloroethyl) phosphate, antimony trioxide, zinc borate and melamine polyphosphate;
the self-repairing agent is prepared from sodium polyitaconate, barium nitride, zinc sulfate and copper sulfate according to the proportion of 1: (0.6-1.2): (0.5-1): (0.4-0.8) by mass ratio;
the composite resin emulsion is prepared from organic silicon modified epoxy resin, vinyl acetate-ethylene copolymer and styrene-acrylic emulsion according to the weight ratio of 1: (0.4-0.8): (0.6-1.2) in a mass ratio.
The invention further provides a preparation method of the shell powder-based light sound insulation exterior wall coating, which comprises the following steps:
s1: uniformly mixing the modified shell powder, the modified fly ash, the polystyrene hollow microspheres and the silica aerogel, then adding the flame retardant and the self-repairing agent, and uniformly stirring to obtain a dry mixture;
s2: uniformly mixing the composite resin emulsion and the nano alumina sol, dropwise adding N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, and uniformly stirring to obtain a wet mixed material;
s3: and uniformly mixing the dry mixture and the wet mixture to obtain the shell powder-based light sound-insulation external wall coating.
In the embodiment, the exterior wall coating is prepared by taking the modified shell powder and the modified fly ash as rigid framework materials, and the prepared coating has the advantages of light weight, sound insulation, noise reduction, high bonding strength, excellent leveling property, durability, weather resistance and the like, and is suitable for different extreme conditions. In a humid environment, water is used as an exciting agent, the crack is repaired by utilizing the solidification and crystallization reaction of a self-repairing agent, meanwhile, in a high-temperature environment, the free epoxy group in the composite resin emulsion and the amino group in the N-beta- (aminoethyl) -gamma-aminopropyl trimethoxy silane generate a ring-opening crosslinking reaction, and meanwhile, the N-beta- (aminoethyl) -gamma-aminopropyl trimethoxy silane, the modified shell powder and the hydroxyl group on the surface of the modified fly ash form a silane siloxane bond or a hydrogen bond to form a high-strength network crosslinking system, so that the stability of the coating is greatly improved, and cracking and peeling are prevented.
In the embodiment, HCl solution is firstly utilized to treat shell powder and fly ash to separate out part of Ca in the shell powder 2+ Part A1 of the fly ash 3+ 、Fe 3+ 、Ca 2+ 、Mg 2+ The components are equal, so that the inorganic framework material is lighter and lower in density, and further treated by adopting an HF solution to react with metal ions in a reaction system to form CaF on the surface of the shell powder 2 Forming A1F on the surface of fly ash 3 、FeF 3 、CaF 2 、MgF 2 And the acid and alkali resistant insoluble shell greatly improves the weather resistance and acid and alkali resistant performance of the coating, can also keep stable performance in an acid rain environment, and ensures that the outer wall coating does not crack or peel.
According to the embodiment, the characteristics of hollow and porous interiors of the modified shell powder, the modified fly ash, the polystyrene hollow microspheres and the silica aerogel are utilized, so that the sound insulation and noise reduction performance of the exterior wall coating is greatly improved, the heat insulation performance is improved, and the coating is lighter.
The embodiment adopts the composite resin emulsion and the nano alumina sol as the adhesive, greatly improves the adhesive strength of the exterior wall coating, improves the leveling property of the coating, and simultaneously, the nano particles in the nano alumina sol are also used as the repairing agent to fill up tiny pot holes in the coating, so that the coating is smooth and flat.
The self-repairing agent of the embodiment is prepared by compounding sodium polyitaconate, barium nitride, zinc sulfate and copper sulfate, under the action of water excitation, the barium nitride is hydrated to form barium hydroxide, and the barium hydroxide reacts with the sodium polyitaconate, the zinc sulfate and the copper sulfate to form insoluble crystals of barium polyitaconate/zinc/copper, zinc hydroxide/copper and barium sulfate, so that cracks and pits of a coating are repaired, and the self-repairing function is continuously exerted.
Example 1
A preparation method of a shell powder-based light sound insulation exterior wall coating comprises the following steps:
s1: preparing materials:
s101: preparing modified shell powder: placing the shell powder in a 0.1mol/LHCl solution, stirring for 10min, then dropwise adding a 0.4mol/L HF solution, controlling the dosage ratio of the shell powder, the HCl solution and the HF solution to be 1g;
s102: placing the fly ash into 0.1mol/L HCl solution, stirring for 10min, then dropwise adding 0.4mol/LHF solution, controlling the dosage ratio of the shell powder, the HCl solution and the HF solution to be 1g, 5mL, 2mL, continuously stirring for 10min, filtering, washing and drying to obtain the modified fly ash;
s103: preparing a self-repairing agent: mixing sodium polyitaconate, barium nitride, zinc sulfate and copper sulfate according to the proportion of 1:0.6:0.5:0.4, obtained from the repairing agent;
s104: preparing a composite resin emulsion: organic silicon modified epoxy resin, vinyl acetate-ethylene copolymer and styrene-acrylic emulsion are mixed according to the proportion of 1:0.4:0.6 to obtain composite resin emulsion;
s105: weighing the following raw materials in parts by mass: 50 parts of modified shell powder, 30 parts of modified fly ash, 5 parts of polystyrene hollow microspheres, 5 parts of silica aerogel, 0.5 part of tributyl phosphate, 5 parts of self-repairing agent, 1 part of N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, 25 parts of composite resin emulsion and 20 parts of nano alumina sol;
s2: uniformly mixing the modified shell powder, the modified fly ash, the polystyrene hollow microspheres and the silica aerogel, then adding tributyl phosphate and the self-repairing agent, and uniformly stirring to obtain a dry mixture;
s3: uniformly mixing the composite resin emulsion and the nano alumina sol, dropwise adding N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, and uniformly stirring to obtain a wet mixed material;
s4: and uniformly mixing the dry mixture and the wet mixture to obtain the shell powder-based light sound-insulation external wall coating.
Example 2
A preparation method of a shell powder-based light sound insulation exterior wall coating comprises the following steps:
s1: preparing materials:
s101: preparing modified shell powder: placing the shell powder in a 0.3mol/LHCl solution, stirring for 20min, then dropwise adding a 0.7mol/L HF solution, controlling the dosage ratio of the shell powder, the HCl solution and the HF solution to be 1g;
s102: placing the fly ash in 0.3mol/L HCl solution, stirring for 20min, then dropwise adding 0.7mol/LHF solution, controlling the dosage ratio of the shell powder, the HCl solution and the HF solution to be 1g;
s103: preparing a self-repairing agent: mixing sodium polyitaconate, barium nitride, zinc sulfate and copper sulfate according to the proportion of 1:1:0.75:0.6, and obtaining the repairing agent;
s104: preparing a composite resin emulsion: organic silicon modified epoxy resin, vinyl acetate-ethylene copolymer and styrene-acrylic emulsion are mixed according to the proportion of 1:0.6:0.9 mass ratio to obtain composite resin emulsion;
s105: weighing the following raw materials in parts by mass: 60 parts of modified shell powder, 35 parts of modified fly ash, 7.5 parts of polystyrene hollow microspheres, 7.5 parts of silica aerogel, 0.8 part of zinc borate, 7.5 parts of self-repairing agent, 1.5 parts of N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, 30 parts of composite resin emulsion and 22.5 parts of nano alumina sol;
s2: uniformly mixing the modified shell powder, the modified fly ash, the polystyrene hollow microspheres and the silica aerogel, then adding the zinc borate and the self-repairing agent, and uniformly stirring to obtain a dry mixture;
s3: uniformly mixing the composite resin emulsion and the nano alumina sol, dropwise adding N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, and uniformly stirring to obtain a wet mixed material;
s4: and uniformly mixing the dry mixture and the wet mixture to obtain the shell powder-based light sound-insulation external wall coating.
Example 3
A preparation method of a shell powder-based light sound insulation exterior wall coating comprises the following steps:
s1: preparing materials:
s101: preparing modified shell powder: placing the shell powder in a 0.5mol/LHCl solution, stirring for 30min, then dropwise adding a 1mol/L HF solution, controlling the dosage ratio of the shell powder to the HCl solution to be 1g;
s102: placing the fly ash in a 0.5mol/LHCl solution, stirring for 30min, then dropwise adding a 1mol/LHF solution, controlling the dosage ratio of the shell powder, the HCl solution and the HF solution to be 1g;
s103: preparing a self-repairing agent: mixing sodium polyitaconate, barium nitride, zinc sulfate and copper sulfate according to a proportion of 1:1.2:1:0.8, is obtained from the repairing agent;
s104: preparing a composite resin emulsion: the organic silicon modified epoxy resin, the vinyl acetate-ethylene copolymer and the styrene-acrylic emulsion are mixed according to the proportion of 1:0.8:1.2 to obtain composite resin emulsion;
s105: weighing the following raw materials in parts by mass: 70 parts of modified shell powder, 40 parts of modified fly ash, 10 parts of polystyrene hollow microspheres, 10 parts of silica aerogel, 1 part of melamine polyphosphate, 10 parts of self-repairing agent, 2 parts of N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, 40 parts of composite resin emulsion and 25 parts of nano alumina sol;
s2: uniformly mixing modified shell powder, modified fly ash, polystyrene hollow microspheres and silica aerogel, adding melamine polyphosphate and a self-repairing agent, and uniformly stirring to obtain a dry mixture;
s3: uniformly mixing the composite resin emulsion and the nano alumina sol, dropwise adding N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, and uniformly stirring to obtain a wet mixed material;
s4: and uniformly mixing the dry mixture and the wet mixture to obtain the shell powder-based light sound-insulation external wall coating.
Comparative example 1 is the same as example 1 except that: the self-repairing agent of the comparative example 1 does not contain sodium polyitaconate, and the preparation method comprises the following steps: mixing barium nitride, zinc sulfate and copper sulfate according to the weight ratio of 0.6:0.5: and (3) mixing uniformly according to the mass ratio of 0.4 to obtain the product.
Comparative example 2 is the same as example 1 except that: no self-repairing agent is added in the preparation process.
The exterior wall coatings prepared in examples 1 to 3 and comparative examples 1 to 2 were subjected to performance measurement:
| washing and brushing resistance/times | Acid resistance | Alkali resistance | Compressive strength/MPa | |
| Example 1 | 1000 | No abnormal condition for 24 hours | No abnormal condition for 24 hours | 8.3 |
| Example 2 | 1100 | No abnormal condition for 24 hours | No abnormal condition for 24 hours | 8.7 |
| Example 3 | 1100 | No abnormal condition for 24 hours | No abnormal condition for 24 hours | 9.0 |
| Comparative example 1 | 800 | No abnormal condition for 24 hours | No abnormal condition for 24 hours | 7.6 |
| Comparative example 2 | 500 | No abnormal condition for 24 hours | No abnormal condition for 24 hours | 5.2 |
As can be seen from the table above, the self-repairing agent of the invention can obviously improve the scrubbing resistance and compressive strength of the exterior wall coating, and improve the fatigue resistance.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (7)
1. The shell powder-based light sound insulation exterior wall coating is characterized by comprising the following raw materials in parts by mass:
2. the shell powder-based light sound insulation external wall coating material according to claim 1, characterized in that the preparation method of the modified shell powder comprises the following steps: and (2) placing the shell powder into a 0.1-0.5mol/LHCl solution, stirring for 10-30min, then dropwise adding a 0.4-1mol/LHF solution, controlling the dosage ratio of the shell powder, the HCl solution and the HF solution to be 1g.
3. The shell powder-based light sound insulation external wall coating material according to claim 1, characterized in that the preparation method of the modified fly ash comprises the following steps: placing the fly ash in 0.1-0.5mol/LHCl solution, stirring for 10-30min, then dropwise adding 0.4-1mol/LHF solution, controlling the dosage ratio of the shell powder, the HCl solution and the HF solution to be 1g.
4. The shell powder-based light-weight sound-insulation external wall coating material according to claim 1, wherein the flame retardant is one or more of tributyl phosphate, tri (2-ethylhexyl) phosphate, tri (2-chloroethyl) phosphate, antimony trioxide, zinc borate and melamine polyphosphate.
5. The shell powder-based light sound-insulation external wall coating material of claim 1, wherein the self-repairing agent is prepared from sodium polyitaconate, barium nitride, zinc sulfate and copper sulfate in a proportion of 1: (0.6-1.2): (0.5-1): (0.4-0.8) by mass ratio.
6. The shell powder-based light sound-insulation external wall coating material as claimed in claim 1, wherein the composite resin emulsion is prepared from organosilicon modified epoxy resin, vinyl acetate-ethylene copolymer and styrene-acrylic emulsion in a proportion of 1: (0.4-0.8): (0.6-1.2) by mass ratio.
7. The preparation method of the shell powder-based light sound-insulation external wall coating according to claim 1, characterized by comprising the following steps:
s1: uniformly mixing the modified shell powder, the modified fly ash, the polystyrene hollow microspheres and the silica aerogel, adding the flame retardant and the self-repairing agent, and uniformly stirring to obtain a dry mixture;
s2: uniformly mixing the composite resin emulsion and the nano alumina sol, dropwise adding N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, and uniformly stirring to obtain a wet mixed material;
s3: and uniformly mixing the dry mixture and the wet mixture to obtain the shell powder-based light sound-insulation external wall coating.
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| CN116082940A (en) * | 2022-12-29 | 2023-05-09 | 河南三棵树新材料科技有限公司 | Exposed water-based polyurethane waterproof coating and preparation method and construction method thereof |
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| CN115340322B (en) | 2023-07-18 |
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