CN111423185A - Nano densified polymer-based waterproof coating and preparation method thereof - Google Patents
Nano densified polymer-based waterproof coating and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/047—Zeolites
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- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1033—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00508—Cement paints
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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Abstract
The invention relates to the field of waterproof coatings, and discloses a nanometer densified polymer-based waterproof coating and a preparation method thereof. The preparation method comprises the following preparation processes: (1) adding aluminum trichloride and nano zeolite powder into water in sequence, filtering and drying to obtain an aluminum trichloride/zeolite powder composite material; (2) performing ball milling treatment on the composite material, then adding polyvinyl alcohol and water, and uniformly stirring to obtain a polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material; (3) and uniformly mixing the composite material with barite powder, nano silicon dioxide, polymer redispersible rubber powder, Portland cement and a thickening agent to obtain the nano densified polymer-based waterproof coating. The polymer-based waterproof coating prepared by the invention contains the polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material, can slowly fill the defects with the aluminum trichloride when the coating has defects, and simultaneously forms gel to form a film to seal micropores, so that the waterproof layer is more compact, and the waterproof performance of the waterproof coating is improved.
Description
Technical Field
The invention relates to the field of waterproof coatings, and discloses a nanometer densified polymer-based waterproof coating and a preparation method thereof.
Background
The waterproof paint is used as one kind of environment protecting waterproof material and is painted to the surface of building to form one layer of film through solvent or water volatilization or chemical reaction to isolate the surface of building from water and to reach waterproof and sealing effect. The waterproof film formed by curing the waterproof coating has certain extensibility, elastoplasticity, crack resistance, impermeability and weather resistance, and can play roles in waterproofing, seepage prevention and protection. The waterproof coating has good temperature adaptability, simple and convenient operation and easy maintenance, and the waterproof film formed after curing has certain extensibility, elastoplasticity, crack resistance, impermeability and weather resistance, can play a role in effective waterproofing, seepage prevention and protection, and is widely applied to various fields of home decoration, building engineering, roads and bridges, tunnels, corrosion prevention and the like at present.
Polymer cement based waterproofing coatings, commonly referred to as JS waterproofing coatings. The polymer cement-based waterproof coating is a single-component or double-component water-based building waterproof coating prepared by taking polymer emulsion such as acrylic ester and cement as main raw materials and adding other additives. The coating combines the advantages of polymer and cement, and has the characteristics of 'hardness and softness', namely extensibility and water resistance of a polymer coating film, high strength of a hydraulic cementing material and strong binding capacity with a wet base layer.
The polymer cement-based waterproof coating has the advantages of convenient construction, low comprehensive cost, short construction period, no toxicity and environmental protection. The JS composite waterproof paint is a non-toxic and nuisanceless novel building waterproof material. The coating uses water as a dispersant, and solves the problems of environmental pollution and harm to human health caused by adopting solvent-based waterproof coatings such as tar, asphalt and the like. Meanwhile, the polymer waterproof coating film is tough, high in tensile strength, good in extensibility, corrosion resistant, strong in structural expansion and deformation resistance, and excellent in waterproof performance. At present, the research of novel polymer cement-based waterproof coatings is paid attention by people.
The Chinese patent application No. 201711204402.3 discloses a waterproof paint, which comprises the following components: styrene-acrylate-acrylic acid copolymer emulsion, mountain flour, heavy calcium carbonate, an anti-aging agent, a defoaming agent, talcum powder, fumed silica, polyvinyl alcohol, water glass and water. The waterproof coating is waterproof, steam-proof, strong in adhesive force and good in film forming hardness; the anti-aging agent and the defoaming agent are added, so that the foaming is not easy to occur and the anti-aging effect is achieved; the stone powder is made of natural stones, and has the advantages of considerable hardness, good mechanical property, good adhesion and good compactness; the polyvinyl alcohol has the functions of mildew resistance and thickening.
The Chinese invention patent application number 201811497212.X discloses a polymer cement waterproof coating and a preparation method thereof, wherein the polymer cement waterproof coating comprises a powder component and a liquid component, and the powder component comprises cement, talcum powder, light calcium carbonate, fly ash, a thickening agent and a dispersing agent; the liquid material component comprises acrylic acid series multilayer core-shell polymer emulsion, a defoaming agent, a film forming auxiliary agent, a flatting agent and a water reducing agent. The preparation method of the polymer cement waterproof coating comprises the following steps: uniformly mixing cement, talcum powder, light calcium carbonate, fly ash, a thickening agent and a dispersing agent to obtain a powder component, uniformly mixing an acrylic multi-layer core-shell polymer emulsion, a defoaming agent, a film-forming assistant, a flatting agent and a water reducing agent to obtain a liquid component, and uniformly mixing the powder component and the liquid component to obtain the polymer cement waterproof coating.
According to the above, due to the characteristics of the high molecular polymer, molecular chain curling and shrinking are likely to occur in the film forming process of the polymer waterproof coating in the existing scheme, so that various defects are formed in the coating, and the compactness of the waterproof layer is deteriorated to influence the waterproof function.
Disclosure of Invention
At present, the widely applied polymer-based waterproof coating is easy to shrink to form defects in the film forming process, so that the compactness of a waterproof layer is poor, and the waterproof performance is influenced.
The invention achieves the above purpose by the following technical scheme:
a method for preparing nano densified polymer-based waterproof paint comprises the following specific steps:
(1) dissolving aluminum trichloride in water, adding nano zeolite powder, dispersing uniformly to make aluminum trichloride stay in micropores of the nano zeolite powder, filtering redundant aluminum trichloride liquid, and drying to obtain an aluminum trichloride/zeolite powder composite material;
(2) putting the aluminum trichloride/zeolite powder composite material obtained in the step (1) into a ball mill, then carrying out ball milling treatment, adding polyvinyl alcohol and a small amount of water, and continuously stirring uniformly to obtain a polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material;
(3) and (3) uniformly mixing the polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material obtained in the step (2) with barite powder, nano silicon dioxide, polymer redispersible rubber powder, Portland cement and a thickening agent to obtain the nano densified polymer-based waterproof coating.
Preferably, the drying temperature in the step (1) is 120-140 ℃, and the time is 2-3 h.
Aiming at the problem that the polymer-based waterproof coating is easy to shrink to form defects in the film forming process, aluminum trichloride is selected as a raw material, a gel reaction can be performed to form a film, and the defects in the film forming process of the polymer-based waterproof coating are effectively filled; however, the effect of filling defects is influenced by the over-quick release of the aluminum trichloride, so that the nano zeolite powder is selected to load the aluminum trichloride, the nano zeolite has a rough surface and a porous structure, and has strong carrying capacity, the material can be uniformly adsorbed on the surface and can be adsorbed in holes and channels, the availability of the material is improved, and the uniformity of mixing is greatly improved. Preferably, the raw materials in the step (1) comprise, by weight, 5-10 parts of aluminum trichloride, 30-4 parts of water and 15-20 parts of zeolite powder.
The aluminum trichloride/zeolite powder composite material is subjected to ball milling treatment at a certain temperature and a certain rotating speed, so that the aluminum trichloride is more uniformly loaded in the pore channels of the zeolite powder. Preferably, the rotation speed of the ball milling treatment in the step (2) is 24-28r/min, the temperature is 80-90 ℃, and the time is 30-40 min.
After the aluminum trichloride/zeolite powder composite material is subjected to ball milling treatment, polyvinyl alcohol and water are added, the characteristic that polyvinyl alcohol is easy to form a film is utilized, and the mechanical property of a polyvinyl alcohol film is excellent, so that the polyvinyl alcohol film is coated on the surface of the aluminum trichloride/zeolite powder composite material, and the slow release effect of aluminum trichloride is achieved. Preferably, the continuous stirring time in the step (2) is 10-20 min; the aluminum trichloride/zeolite powder composite material comprises, by weight, 3-8 parts of an aluminum trichloride/zeolite powder composite material, 2-6 parts of polyvinyl alcohol and 0.5-1 part of water.
Preferably, the polymer redispersible rubber powder in the step (3) is ethylene-vinyl acetate copolymer rubber powder.
Preferably, the thickener in step (3) is XG-60 thickener.
Preferably, the raw materials in the step (3) are 3-8 parts by weight of polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material, 10-15 parts by weight of barite powder, 10-15 parts by weight of nano silicon dioxide, 1-2 parts by weight of polymer redispersible rubber powder, 20-40 parts by weight of silicate cement and 0.5-1 part by weight of thickener.
After the waterproof coating prepared by the invention is coated, a polyvinyl alcohol chain segment is curled in a concrete alkaline environment, aluminum trichloride in the nano zeolite powder starts to be slowly released, the defect formed by polymer shrinkage is gradually filled, a gel film is formed, micropores in the waterproof layer are effectively sealed, the waterproof layer is more densified, and the waterproof performance of the polymer-based waterproof coating is improved.
The nanometer densified polymer-based waterproof coating prepared by the method is coated on the surface of concrete to form a densified waterproof layer, and has excellent waterproof performance.
The invention provides a nanometer densified polymer-based waterproof coating and a preparation method thereof.A, after aluminum trichloride is dissolved in water, nanometer zeolite powder is added for uniform dispersion, and the aluminum trichloride/zeolite powder composite material is obtained after filtration and drying; putting the aluminum trichloride/zeolite powder composite material into a ball mill for ball milling treatment, adding polyvinyl alcohol and a small amount of water, and stirring to obtain a polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material; uniformly mixing the polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material with barite powder, nano silicon dioxide, polymer redispersible rubber powder, Portland cement and a thickening agent.
The invention provides a nano densified polymer-based waterproof coating and a preparation method thereof, and compared with the prior art, the nano densified polymer-based waterproof coating has the outstanding characteristics and excellent effects that:
1. provides a method for preparing nanometer densified polymer-based waterproof paint by using polyvinyl alcohol to coat aluminum trichloride/zeolite powder composite material.
2. The aluminum trichloride is pre-reserved in micropores of the nano zeolite powder, and then the polyvinyl alcohol is used for coating the nano zeolite powder to achieve the effect of slowly releasing the aluminum trichloride, so that after the prepared waterproof coating is coated, the coated aluminum trichloride is slowly released to fill the defects formed by the shrinkage of polymers, and simultaneously, gel is formed to form a film to seal the micropores in the waterproof layer, so that the waterproof layer is more densified, and the waterproof performance of the polymer-based waterproof coating is improved.
3. The preparation method has the advantages of simple preparation process, convenient operation, easily obtained raw materials and excellent application prospect.
Drawings
FIG. 1: (a) is the water retention map of the paint coated bamboo basket prepared in example 6; (b) the picture is a picture after 24 hours of water filling, and the water leakage condition does not occur.
FIG. 2: (c) is the water containing pattern of the paint-coated bamboo basket prepared in comparative example 1; (d) the picture is a picture after 24 hours of water filling, and the water leakage condition occurs.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but it should not be construed that the scope of the present invention is limited to the following examples. Various substitutions and alterations can be made by those skilled in the art and by conventional means without departing from the spirit of the method of the invention described above.
Example 1
(1) Dissolving aluminum trichloride in water, adding nano zeolite powder, dispersing uniformly to make aluminum trichloride stay in micropores of the nano zeolite powder, filtering, drying to obtain the aluminum trichloride/zeolite powder composite material; the drying temperature is 128 ℃, and the drying time is 2.5 h;
the raw materials comprise, by weight, 7 parts of aluminum trichloride, 30 parts of water and 15 parts of zeolite powder;
(2) putting the aluminum trichloride/zeolite powder composite material obtained in the step (1) into a ball mill, then carrying out ball milling treatment, adding polyvinyl alcohol and a small amount of water, and continuously stirring uniformly to obtain a polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material; the rotation speed of ball milling treatment is 25r/min, the temperature is 86 ℃, and the time is 34 min; the stirring time is 16 min;
the raw materials comprise, by weight, 5 parts of aluminum trichloride/zeolite powder composite material, 3 parts of polyvinyl alcohol and 0.8 part of water;
(3) uniformly mixing the polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material obtained in the step (2) with barite powder, nano silicon dioxide, polymer redispersible rubber powder, Portland cement and a thickening agent to obtain a nano densified polymer-based waterproof coating; the polymer re-dispersible rubber powder is ethylene-vinyl acetate copolymer rubber powder; the thickening agent is XG-60 thickening agent;
the raw materials comprise, by weight, 5 parts of polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material, 13 parts of barite powder, 13 parts of nano-silica, 1 part of polymer redispersible rubber powder, 28 parts of portland cement and 0.7 part of thickening agent.
Example 2
(1) Dissolving aluminum trichloride in water, adding nano zeolite powder, dispersing uniformly to make aluminum trichloride stay in micropores of the nano zeolite powder, filtering, drying to obtain the aluminum trichloride/zeolite powder composite material; the drying temperature is 125 ℃, and the drying time is 3 hours;
the raw materials comprise, by weight, 6 parts of aluminum trichloride, 35 parts of water and 18 parts of zeolite powder;
(2) putting the aluminum trichloride/zeolite powder composite material obtained in the step (1) into a ball mill, then carrying out ball milling treatment, adding polyvinyl alcohol and a small amount of water, and continuously stirring uniformly to obtain a polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material; the rotation speed of ball milling treatment is 25r/min, the temperature is 82 ℃, and the time is 38 min; the time for continuing stirring is 12 min;
the raw materials comprise, by weight, 4 parts of aluminum trichloride/zeolite powder composite material, 3 parts of polyvinyl alcohol and 0.8 part of water;
(3) uniformly mixing the polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material obtained in the step (2) with barite powder, nano silicon dioxide, polymer redispersible rubber powder, Portland cement and a thickening agent to obtain a nano densified polymer-based waterproof coating; the polymer re-dispersible rubber powder is ethylene-vinyl acetate copolymer rubber powder; the thickening agent is XG-60 thickening agent;
the raw materials comprise, by weight, 4 parts of polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material, 11 parts of barite powder, 12 parts of nano-silica, 1 part of polymer redispersible rubber powder, 35 parts of Portland cement and 0.6 part of thickening agent.
Example 3
(1) Dissolving aluminum trichloride in water, adding nano zeolite powder, dispersing uniformly to make aluminum trichloride stay in micropores of the nano zeolite powder, filtering, drying to obtain the aluminum trichloride/zeolite powder composite material; the drying temperature is 135 ℃, and the drying time is 2 hours;
the raw materials comprise, by weight, 9 parts of aluminum trichloride, 30 parts of water and 15 parts of zeolite powder;
(2) putting the aluminum trichloride/zeolite powder composite material obtained in the step (1) into a ball mill, then carrying out ball milling treatment, adding polyvinyl alcohol and a small amount of water, and continuously stirring uniformly to obtain a polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material; the rotation speed of ball milling treatment is 27r/min, the temperature is 88 ℃, and the time is 32 min; the time for continuing stirring is 18 min;
the raw materials comprise, by weight, 7 parts of aluminum trichloride/zeolite powder composite material, 5 parts of polyvinyl alcohol and 0.6 part of water;
(3) uniformly mixing the polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material obtained in the step (2) with barite powder, nano silicon dioxide, polymer redispersible rubber powder, Portland cement and a thickening agent to obtain a nano densified polymer-based waterproof coating; the polymer re-dispersible rubber powder is ethylene-vinyl acetate copolymer rubber powder; the thickening agent is XG-60 thickening agent;
the raw materials comprise, by weight, 7 parts of polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material, 14 parts of barite powder, 14 parts of nano-silica, 2 parts of polymer redispersible rubber powder, 25 parts of Portland cement and 0.8 part of thickening agent.
Example 4
(1) Dissolving aluminum trichloride in water, adding nano zeolite powder, dispersing uniformly to make aluminum trichloride stay in micropores of the nano zeolite powder, filtering, drying to obtain the aluminum trichloride/zeolite powder composite material; the drying temperature is 120 ℃, and the drying time is 3 hours;
the raw materials comprise, by weight, 5 parts of aluminum trichloride, 35 parts of water and 15 parts of zeolite powder;
(2) putting the aluminum trichloride/zeolite powder composite material obtained in the step (1) into a ball mill, then carrying out ball milling treatment, adding polyvinyl alcohol and a small amount of water, and continuously stirring uniformly to obtain a polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material; the rotation speed of ball milling treatment is 28r/min, the temperature is 80 ℃, and the time is 40 min; the time for continuing stirring is 10 min;
the raw materials comprise 3 parts by weight of aluminum trichloride/zeolite powder composite material, 2 parts by weight of polyvinyl alcohol and 1 part by weight of water;
(3) uniformly mixing the polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material obtained in the step (2) with barite powder, nano silicon dioxide, polymer redispersible rubber powder, Portland cement and a thickening agent to obtain a nano densified polymer-based waterproof coating; the polymer re-dispersible rubber powder is ethylene-vinyl acetate copolymer rubber powder; the thickening agent is XG-60 thickening agent;
the raw materials comprise, by weight, 3 parts of polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material, 10 parts of barite powder, 10 parts of nano-silica, 1 part of polymer redispersible rubber powder, 40 parts of portland cement and 0.5 part of thickening agent.
Example 5
(1) Dissolving aluminum trichloride in water, adding nano zeolite powder, dispersing uniformly to make aluminum trichloride stay in micropores of the nano zeolite powder, filtering, drying to obtain the aluminum trichloride/zeolite powder composite material; the drying temperature is 140 ℃, and the drying time is 2 hours;
the raw materials comprise, by weight, 10 parts of aluminum trichloride, 30 parts of water and 16 parts of zeolite powder;
(2) putting the aluminum trichloride/zeolite powder composite material obtained in the step (1) into a ball mill, then carrying out ball milling treatment, adding polyvinyl alcohol and a small amount of water, and continuously stirring uniformly to obtain a polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material; the rotation speed of ball milling treatment is 28r/min, the temperature is 90 ℃, and the time is 30 min; the stirring is continued for 20 min;
the raw materials comprise 8 parts by weight of aluminum trichloride/zeolite powder composite material, 6 parts by weight of polyvinyl alcohol and 0.5 part by weight of water;
(3) uniformly mixing the polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material obtained in the step (2) with barite powder, nano silicon dioxide, polymer redispersible rubber powder, Portland cement and a thickening agent to obtain a nano densified polymer-based waterproof coating; the polymer re-dispersible rubber powder is ethylene-vinyl acetate copolymer rubber powder; the thickening agent is XG-60 thickening agent;
the raw materials comprise, by weight, 8 parts of polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material, 15 parts of barite powder, 15 parts of nano-silica, 2 parts of polymer redispersible rubber powder, 20 parts of Portland cement and 1 part of thickener.
Example 6
(1) Dissolving aluminum trichloride in water, adding nano zeolite powder, dispersing uniformly to make aluminum trichloride stay in micropores of the nano zeolite powder, filtering, drying to obtain the aluminum trichloride/zeolite powder composite material; the drying temperature is 130 ℃, and the drying time is 2.5 h;
the raw materials comprise, by weight, 8 parts of aluminum trichloride, 35 parts of water and 20 parts of zeolite powder;
(2) putting the aluminum trichloride/zeolite powder composite material obtained in the step (1) into a ball mill, then carrying out ball milling treatment, adding polyvinyl alcohol and a small amount of water, and continuously stirring uniformly to obtain a polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material; the rotation speed of ball milling treatment is 26r/min, the temperature is 85 ℃, and the time is 35 min; the time for continuing stirring is 15 min;
the raw materials comprise 6 parts by weight of aluminum trichloride/zeolite powder composite material, 4 parts by weight of polyvinyl alcohol and 0.8 part by weight of water;
(3) uniformly mixing the polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material obtained in the step (2) with barite powder, nano silicon dioxide, polymer redispersible rubber powder, Portland cement and a thickening agent to obtain a nano densified polymer-based waterproof coating; the polymer re-dispersible rubber powder is ethylene-vinyl acetate copolymer rubber powder; the thickening agent is XG-60 thickening agent;
the raw materials comprise, by weight, 6 parts of polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material, 12 parts of barite powder, 12 parts of nano-silica, 1 part of polymer redispersible rubber powder, 30 parts of Portland cement and 0.8 part of thickening agent.
Comparative example 1
(1) Firstly, uniformly dispersing aluminum trichloride and nano zeolite powder to obtain an aluminum trichloride/zeolite powder composite material;
8 parts of aluminum trichloride and 20 parts of zeolite powder by weight;
(2) uniformly mixing the aluminum trichloride/zeolite powder composite material obtained in the step (1) with barite powder, nano silicon dioxide, polymer redispersible rubber powder, Portland cement and a thickening agent to obtain a nano densified polymer-based waterproof coating; the polymer re-dispersible rubber powder is ethylene-vinyl acetate copolymer rubber powder; the thickening agent is XG-60 thickening agent;
the raw materials comprise, by weight, 6 parts of an aluminum trichloride/zeolite powder composite material, 12 parts of barite powder, 12 parts of nano-silica, 1 part of polymer redispersible rubber powder, 30 parts of Portland cement and 0.8 part of a thickening agent.
Comparative example 1 aluminum trichloride and the nano zeolite powder were directly used in combination under the same conditions as in example 6.
The coating obtained in examples 1-6 and comparative example 1 and water are uniformly stirred in a mass ratio of 1:3, coated on a hollow bamboo basket to form a coating with the thickness of 1.5mm, cured for 3d, filled with water, and kept for 24h, and then the water leakage condition is observed. The coatings of examples 1-6 did not leak, whereas comparative example 1 exhibited significant leakage.
FIG. 1 (a) is a water plot of a paint coated bamboo basket prepared in example 6; (b) the picture is a picture after 24 hours of water filling, and the water leakage condition does not occur. FIG. 2 (c) is a water retention diagram of the paint-coated bamboo basket prepared in comparative example 1; (d) the picture is a picture after 24 hours of water filling, and the water leakage condition occurs.
The concrete of comparative example 1 is not as good in waterproof effect as example 6, and it is also verified that after the waterproof coating is coated, the polyvinyl alcohol chain segment is curled in the concrete alkaline environment, the aluminum trichloride in the nano zeolite powder starts to be slowly released, the defect formed by the shrinkage of the polymer is gradually filled, and a gel film is formed to effectively seal the micropores in the waterproof layer, so that the waterproof layer is more densified, and the waterproof performance of the polymer-based waterproof coating is improved.
Claims (10)
1. A preparation method of a nanometer densified polymer-based waterproof coating is characterized by comprising the following specific steps:
(1) dissolving aluminum trichloride in water, adding nano zeolite powder, dispersing uniformly to make aluminum trichloride stay in micropores of the nano zeolite powder, filtering redundant aluminum trichloride liquid, and drying to obtain an aluminum trichloride/zeolite powder composite material;
(2) putting the aluminum trichloride/zeolite powder composite material obtained in the step (1) into a ball mill, then carrying out ball milling treatment, adding polyvinyl alcohol and a small amount of water, and continuously stirring uniformly to obtain a polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material;
(3) and (3) uniformly mixing the polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material obtained in the step (2) with barite powder, nano silicon dioxide, polymer redispersible rubber powder, Portland cement and a thickening agent to obtain the nano densified polymer-based waterproof coating.
2. The method of claim 1, wherein the nano-densified polymer-based waterproof coating is prepared by the following steps: the drying temperature in the step (1) is 120-140 ℃, and the drying time is 2-3 h.
3. The method of claim 1, wherein the nano-densified polymer-based waterproof coating is prepared by the following steps: the raw materials in the step (1) comprise, by weight, 5-10 parts of aluminum trichloride, 30-40 parts of water and 15-20 parts of zeolite powder.
4. The method of claim 1, wherein the nano-densified polymer-based waterproof coating is prepared by the following steps: and (3) the rotation speed of the ball milling treatment in the step (2) is 24-28r/min, the temperature is 80-90 ℃, and the time is 30-40 min.
5. The method of claim 1, wherein the nano-densified polymer-based waterproof coating is prepared by the following steps: and (3) continuously stirring for 10-20 min in the step (2).
6. The method of claim 1, wherein the nano-densified polymer-based waterproof coating is prepared by the following steps: the raw materials in the step (2) comprise, by weight, 3-8 parts of an aluminum trichloride/zeolite powder composite material, 2-6 parts of polyvinyl alcohol and 0.5-1 part of water.
7. The method of claim 1, wherein the nano-densified polymer-based waterproof coating is prepared by the following steps: the polymer redispersible rubber powder in the step (3) is ethylene-vinyl acetate copolymer rubber powder.
8. The method of claim 1, wherein the nano-densified polymer-based waterproof coating is prepared by the following steps: the thickening agent in the step (3) is an XG-60 thickening agent.
9. The method of claim 1, wherein the nano-densified polymer-based waterproof coating is prepared by the following steps: the raw materials in the step (3) comprise, by weight, 3-8 parts of a polyvinyl alcohol coated aluminum trichloride/zeolite powder composite material, 10-15 parts of barite powder, 10-15 parts of nano silica, 1-2 parts of polymer redispersible rubber powder, 20-40 parts of portland cement and 0.5-1 part of a thickening agent.
10. A nano-densified polymer-based waterproofing coating prepared by the method of any of claims 1 to 9.
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| US20150119490A1 (en) * | 2013-10-31 | 2015-04-30 | Hercules Incorporated | Dry mortar and emulsion/dispersion based compositions |
| US9738563B1 (en) * | 2016-06-02 | 2017-08-22 | Nona And Advanced Materials Institute Limited | Ultra-flexible nano-modified cementitious waterproofing coating and method of manufacturing |
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Application publication date: 20200717 |