CN111072314A - Scrubbing-resistant diatom ooze and preparation method thereof - Google Patents
Scrubbing-resistant diatom ooze 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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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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
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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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
- 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 belongs to the technical field of diatom ooze preparation, and particularly relates to scrub-resistant diatom ooze and a preparation method thereof. The method comprises the following steps: (1) adding the hydroxyl calcium phosphate into a phosphoric acid aqueous solution, stirring and dispersing, adding a hydrophobic silane coupling agent, and adjusting the pH value to obtain hydrophobic silane coupling agent modified hydroxyl calcium phosphate; (2) adding diatomite into water for dispersion, and then adding a surfactant and a hydrophobic silane coupling agent to modify calcium hydroxy phosphate to obtain modified diatomite; (3) and uniformly mixing the modified diatomite with the attapulgite, the titanium dioxide, the organic cementing material, the wollastonite powder, the suspension dispersing auxiliary agent and the water to obtain the scrub-resistant diatom ooze. According to the scrub-resistant diatom ooze disclosed by the invention, the surfactant is used for coating the kieselguhr to prevent micropores from being blocked by calcium hydroxy phosphate, so that the specific adsorption performance of the kieselguhr is ensured, and meanwhile, the calcium hydroxy phosphate on the surface of the kieselguhr is insoluble in water to form a film with certain strength, so that the prepared diatom ooze has scrub resistance.
Description
Technical Field
The invention belongs to the technical field of diatom ooze preparation, and particularly relates to scrub-resistant diatom ooze and a preparation method thereof.
Background
The main component of diatom ooze is diatomite, which is a siliceous sedimentary rock of biological origin and mainly consists of remains of ancient diatoms. Diatoms, a unicellular algae organism that first appeared on earth, survived in seawater or lake water, were extremely tiny and often grew and reproduce at an alarming rate. Over the years, diatoms and other plankton sediment into diatom oozes at the bottom of the water. The diatom mineral is a porous material with micron-sized pore channels, countless tiny pores are formed on the particle surface of the diatom mineral, the diatom mineral is regularly and regularly arranged into a circle and a needle, and the number of the tiny pores on a unit area is thousands of times larger than that of charcoal. The molecular sieve structure has strong physical adsorption performance and ion exchange performance. After being finely processed, the product is widely applied to the fields of alcohol and medical injection filtration, water purifiers, food additives, nuclear radiation adsorbents and the like.
The diatomite has many natural advantages, is beneficial to improving indoor environment, can slowly and continuously release negative oxygen ions, and can decompose harmful carcinogens such as formaldehyde, benzene, radon and the like. The diatomite has the properties of fineness, looseness, light weight, porosity, strong water absorption and permeability, so the diatomite is often used as a building material and has the advantages of no toxicity, environmental protection and the like. The diatomite coating additive product has the characteristics of large porosity, strong absorptivity, stable chemical property, wear resistance, heat resistance and the like, and can provide excellent surface performance, capacity increase, thickening and adhesion improvement for the coating. Because it has a large pore volume, the drying time of the coating film can be shortened. The dosage of the resin can be reduced, and the cost is reduced.
The diatom ooze is not electrostatic and dust is not adsorbed, so the diatom ooze is required to be more when being maintained, wherein the biggest difference between the diatom ooze and a wall made of most coatings on the market is that the diatom ooze cannot meet water, because the diatom ooze is a mixture of diatomite and a certain amount of fillers and can become mud when meeting water, and the diatom ooze can be reduced into mud when meeting a large amount of water after being constructed on the wall, which is the essential characteristic of the mud. Therefore, the diatom ooze can not be directly scrubbed by water in daily maintenance without frequent cleaning and scrubbing, and the use of water for scrubbing the wall surface is not beneficial to maintenance of the diatom ooze. It is known that diatom ooze has very excellent adsorption performance, but diatom ooze also has the disadvantages of paintability, easy breakage and difficult cleaning, and in daily use, diatom ooze inevitably does not cause certain damage to walls, and common pollution problems on walls in daily life are most of the instant creation of children, such as fingerprints, foot prints, ball prints or handwriting and the like, or the impact of heavy objects on the walls and the like. And because the diatom ooze wall surface can not meet water and organic solvent, and can not be cleaned and cleaned, the diatom ooze wall stain is difficult to clean, a small amount of water can make the diatom ooze pulverize and fall off, the attractiveness is influenced, and the use value of the diatom ooze is greatly influenced. Therefore, the development of the scrub-resistant diatom ooze has extremely high value for the commercial application of the diatom ooze.
Application number 201710369841.3 discloses a high scrub resistance diatom ooze and a preparation method thereof, which mainly utilizes the decomposition synthesis principle of water to synthesize a water-insoluble CaSiO by coating3So that the coating surface has the special functions of environmental protection and water resistance. But the water still exists in the micropores of the diatomite in the form of crystal water after the active calcium absorbs water, and the CaSiO generated at the same time3Can block micropores and influence the performance of the diatomite.
Disclosure of Invention
Aiming at the problem that the micropores of the existing scrub-resistant diatom ooze can be influenced after water absorption, the invention provides the scrub-resistant diatom ooze which is obtained by a mode of protecting the surface of the micropores and a preparation method thereof.
A preparation method of scrub-resistant diatom ooze comprises the following steps:
(1) adding calcium hydroxy phosphate into phosphoric acid aqueous solution with pH =4, stirring and dispersing, adding a hydrophobic silane coupling agent, stirring and reacting for 5-6 hours at 75-85 ℃, adjusting pH =7, and centrifugally washing to obtain hydrophobic silane coupling agent modified calcium hydroxy phosphate;
(2) adding diatomite into water for dispersion, then continuously adding a surfactant and stirring for 0.5-1 hour, then adding the hydrophobic silane coupling agent modified calcium hydroxy phosphate obtained in the step (1) and continuously stirring for 0.5-1 hour, and centrifugally drying to obtain modified diatomite;
(3) and (3) uniformly mixing the modified diatomite obtained in the step (2) with attapulgite, titanium dioxide, an organic cementing material, wollastonite powder, a suspension dispersing aid and water to obtain the scrub-resistant diatom ooze.
According to the invention, the diatomite and the surfactant are mixed to form a hydrophobic layer on the surface, then the hydrophobic silane coupling agent is added to modify the calcium hydroxy phosphate to enable the calcium hydroxy phosphate to be on the outermost layer, and finally the surfactant is foamed to form pores to ensure that micropores of the diatomite are not blocked, and meanwhile, the calcium hydroxy phosphate is insoluble in water to form a film with certain strength, so that the diatomite has scrubbing resistance. Specifically, (1) adding calcium hydroxy phosphate into phosphoric acid aqueous solution with pH =4, stirring and dispersing, adding a hydrophobic silane coupling agent, stirring and reacting for 5-6 hours at 75-85 ℃, adjusting pH =7, and centrifugally washing to obtain hydrophobic silane coupling agent modified calcium hydroxy phosphate; (2) and (2) adding diatomite into water for dispersion, then continuously adding a surfactant, stirring for 0.5-1 hour, then adding the hydrophobic silane coupling agent modified calcium hydroxy phosphate obtained in the step (1), continuously stirring for 0.5-1 hour, and centrifugally drying to obtain the scrub-resistant diatomite. The micropores of the diatomite are not blocked by the calcium hydroxy phosphate after being coated by the surfactant, so that the original performance of the diatomite is ensured, and meanwhile, the calcium hydroxy phosphate on the surface is insoluble in water to form a film with certain strength, so that the diatomite has scrubbing resistance.
Further, in the preparation method of the scrub resistant diatom ooze, the hydrophobic silane coupling agent in the step (1) is at least one of methyldimethoxysilane, vinyltriethoxysilane, octadecyltrichlorosilane and octyltrichlorosilane.
The invention adopts a hydrophobic silane coupling agent to modify calcium hydroxy phosphate, wherein Si (OCH) in the hydrophobic silane coupling agent3）3Hydrolysis to produce-Si (OH)3Then with a hydroxyl groupHydroxyl on the surface of calcium phosphate forms hydrogen bond and generates dehydration condensation reaction to form-Si-O-M covalent bond (M is calcium phosphate), and hydrophobic groups of the silane coupling agent are grafted to the surface of the calcium phosphate to form wrapping coverage. The hydrophobic silane coupling agent effectively modifies the surface of the calcium hydroxy phosphate, and the surface of the calcium hydroxy phosphate is coated with the hydrophobic silane coupling agent through the chemical adsorption effect, so that the hydrophobicity of the calcium hydroxy phosphate is improved, the dispersibility of the calcium hydroxy phosphate is also improved, the modified calcium hydroxy phosphate is insoluble in water, and a layer of film is formed in the diatom ooze.
Further, the preparation method of the scrub-resistant diatom ooze comprises the step (1) of enabling the mass ratio of the hydroxyl calcium phosphate, the phosphoric acid and the hydrophobic silane coupling agent to be 5-10: 10-15: 1-3.
The surfactant can change the repulsion and attraction balance of the diatomite, so that the suspension rate of the diatomite is improved, and meanwhile, pores are formed in the diatomite through the foaming of the surfactant, so that the situation that micropores of the diatomite are not blocked is effectively guaranteed. Further, in the step (2), the surfactant is at least one of sodium hexadecyl sulfonate, ammonium hexadecyl bromide and sodium hexadecyl benzene sulfonate.
Further, the preparation method of the scrub-resistant diatom ooze comprises the step (2) of enabling the mass ratio of the diatomite, the water, the surfactant and the hydrophobic silane coupling agent modified calcium hydroxy phosphate to be 5-10: 15-40: 0.5-2: 1-3.
The diatomite is formed by remains of aquatic plants diatom, the main chemical component is amorphous silicon dioxide (or called amorphous opal) accompanied by a small amount of clay impurities such as montmorillonite, kaolinite and the like and organic matters, and the diatomite has the special performances of porous structure, low density, large specific surface area, strong adsorption performance, good suspension performance, stable physicochemical performance, sound insulation and heat insulation, wear resistance, acid resistance, no toxicity, no smell and the like. Titanium dioxide is a high-efficiency photocatalyst material, has good photocatalytic activity, and can quickly decompose organic matters. The nano-scale titanium dioxide generates hydroxyl free radicals with strong oxidizing capability in the ultraviolet irradiation process, has the advantages of air purification, bacteriostasis, deodorization, self-cleaning and the like, and is considered as an environment-friendly product with great potential. According to the invention, the diatomite is adopted to load titanium dioxide, so that a certain degradation effect is achieved on formaldehyde absorption under the irradiation of a fluorescent lamp, a small amount of ultraviolet radiation is generated under the irradiation of the fluorescent lamp, oxygen free radicals are generated on the surfaces of titanium dioxide particles, and formaldehyde can be effectively captured and decomposed; particularly, titanium dioxide with an anatase structure is easy to generate free radicals under the irradiation of ultraviolet light, and can degrade about 73% of formaldehyde within 48 hours. Further, in the preparation method of the scrub resistant diatom ooze, the titanium dioxide in the step (3) is anatase titanium dioxide.
The organic gel material has certain influence on the purification of formaldehyde by the diatom ooze, the dosage of the organic gel material is critical, and the adhesion and durability of the diatom ooze wall surface can be influenced if the dosage is too small; the consumption of the catalyst is too large, so that the pore structure of the diatomite can be blocked in the dispersion film-forming process, the further reaction of the titanium dioxide and the formaldehyde is prevented, and the formaldehyde purification rate and the formaldehyde purification durability are obviously reduced. The polyvinyl alcohol powder is prepared by using liquid nitrogen as a medium in a low-temperature environment, is a water-soluble environment-friendly high-molecular polymer, has good film forming property, emulsifying property and bonding property, and a formed film has excellent adhesive force, solvent resistance, friction resistance, tensile strength and oxygen barrier property. The polyvinyl alcohol has two functional groups of hydrophilic group and hydrophobic group, so that the polyvinyl alcohol has interface activity, and can be used as a protective colloid during the emulsification and suspension polymerization of macromolecules. Further, the organic gel material in the step (3) is polyvinyl alcohol.
Further, in the preparation method of the scrub-resistant diatom ooze, the suspension dispersing auxiliary in the step (3) is at least one of polymaleic acid, polyacrylamide and polyethylene glycol.
Further, the preparation method of the scrub-resistant diatom ooze comprises the step (3) that the mass ratio of the modified diatomite, the attapulgite, the titanium dioxide, the organic cementing material, the wollastonite powder, the suspension dispersing auxiliary agent and the water is 35-50: 0.5-5: 3-5: 10-15: 3-8: 0.1-2: 50-80.
The second technical problem to be solved by the invention is to provide the scrub-resistant diatom ooze which is prepared by the preparation method.
In order to solve the second technical problem of the invention, the scrub resistant diatom ooze is prepared by the preparation method of the scrub resistant diatom ooze.
According to the scrub-resistant diatom ooze and the preparation method thereof, the surfactant is used for coating the diatom ooze to prevent micropores from being blocked by calcium hydroxy phosphate, so that the specific adsorption performance of the diatom ooze is guaranteed, and meanwhile, the calcium hydroxy phosphate on the surface of the diatom ooze is insoluble in water to form a film with certain strength, so that the prepared diatom ooze has scrub-resistant performance.
Description of the drawings:
FIG. 1 is a flow chart of the preparation of scrub resistant diatom ooze of the present invention.
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
A preparation method of scrub-resistant diatom ooze comprises the following steps:
(1) adding calcium hydroxy phosphate into phosphoric acid aqueous solution with pH =4, stirring and dispersing, adding a hydrophobic silane coupling agent, stirring and reacting for 5.5 hours at 80 ℃, adjusting pH =7, and centrifugally washing to obtain hydrophobic silane coupling agent modified calcium hydroxy phosphate; the hydrophobic silane coupling agent is methyldimethoxysilane; the mass ratio of the hydroxyl calcium phosphate to the phosphoric acid to the hydrophobic silane coupling agent is 8:13: 2;
(2) adding diatomite into water for dispersion, continuing to add a surfactant for stirring for 0.5 hour, then adding the hydrophobic silane coupling agent modified calcium hydroxy phosphate obtained in the step (1), continuing to stir for 0.5 hour, and centrifugally drying to obtain modified diatomite; the surfactant is sodium hexadecyl sulfonate; the mass ratio of the diatomite, the water, the surfactant and the hydrophobic silane coupling agent modified calcium hydroxy phosphate is 8:25:1: 2;
(3) uniformly mixing the modified diatomite obtained in the step (2) with attapulgite, titanium dioxide, polyvinyl alcohol, wollastonite powder, a suspension dispersing aid and water to obtain scrub-resistant diatom ooze; the titanium dioxide is anatase titanium dioxide; the suspension dispersing auxiliary agent is polymaleic acid; the mass ratio of the modified diatomite to the attapulgite to the titanium dioxide to the organic cementing material to the wollastonite powder to the suspension dispersing auxiliary agent to the water is 40:1:4:12:5:1: 70.
Example 2
A preparation method of scrub-resistant diatom ooze comprises the following steps:
(1) adding calcium hydroxy phosphate into phosphoric acid aqueous solution with pH =4, stirring and dispersing, adding a hydrophobic silane coupling agent, stirring and reacting for 5 hours at 75 ℃, adjusting pH =7, and centrifugally washing to obtain hydrophobic silane coupling agent modified calcium hydroxy phosphate; the hydrophobic silane coupling agent is vinyl triethoxysilane; the mass ratio of the hydroxyl calcium phosphate to the phosphoric acid to the hydrophobic silane coupling agent is 5:15: 2;
(2) adding diatomite into water for dispersion, continuing to add a surfactant for stirring for 1 hour, then adding the hydrophobic silane coupling agent modified calcium hydroxy phosphate obtained in the step (1), continuing to stir for 1 hour, and centrifugally drying to obtain modified diatomite; the surfactant is sodium hexadecyl benzene sulfonate; the mass ratio of the diatomite, the water, the surfactant and the hydrophobic silane coupling agent modified calcium hydroxy phosphate is 9:30:1: 2;
(3) uniformly mixing the modified diatomite obtained in the step (2) with attapulgite, titanium dioxide, polyvinyl alcohol, wollastonite powder, a suspension dispersing aid and water to obtain scrub-resistant diatom ooze; the titanium dioxide is anatase titanium dioxide; the suspension dispersing auxiliary agent is polyethylene glycol; the mass ratio of the modified diatomite to the attapulgite to the titanium dioxide to the organic cementing material to the wollastonite powder to the suspension dispersion auxiliary agent to the water is 50:3:4:10:4:1: 70.
Example 3
A preparation method of scrub-resistant diatom ooze comprises the following steps:
(1) adding calcium hydroxy phosphate into phosphoric acid aqueous solution with pH =4, stirring and dispersing, adding a hydrophobic silane coupling agent, stirring and reacting for 6 hours at 85 ℃, adjusting pH =7, and centrifugally washing to obtain hydrophobic silane coupling agent modified calcium hydroxy phosphate; the hydrophobic silane coupling agent is methyldimethoxysilane; the mass ratio of the hydroxyl calcium phosphate to the phosphoric acid to the hydrophobic silane coupling agent is 9:11: 2;
(2) adding diatomite into water for dispersion, continuing to add a surfactant for stirring for 1 hour, then adding the hydrophobic silane coupling agent modified calcium hydroxy phosphate obtained in the step (1), continuing to stir for 0.5 hour, and centrifugally drying to obtain modified diatomite; the surfactant is cetyl ammonium bromide; the mass ratio of the diatomite, the water, the surfactant and the hydrophobic silane coupling agent modified calcium hydroxy phosphate is 8:19:1: 3;
(3) uniformly mixing the modified diatomite obtained in the step (2) with attapulgite, titanium dioxide, polyvinyl alcohol, wollastonite powder, a suspension dispersing aid and water to obtain scrub-resistant diatom ooze; the titanium dioxide is anatase titanium dioxide, and the suspension dispersing auxiliary agent is polyethylene glycol; the mass ratio of the modified diatomite to the attapulgite to the titanium dioxide to the organic cementing material to the wollastonite powder to the suspension dispersing auxiliary agent to the water is 45:4:3:14:7:1: 65.
Example 4
A preparation method of scrub-resistant diatom ooze comprises the following steps:
(1) adding calcium hydroxy phosphate into phosphoric acid aqueous solution with pH =4, stirring and dispersing, adding a hydrophobic silane coupling agent, stirring and reacting for 5.5 hours at 80 ℃, adjusting pH =7, and centrifugally washing to obtain hydrophobic silane coupling agent modified calcium hydroxy phosphate; the hydrophobic silane coupling agent is octyl trichlorosilane; the mass ratio of the hydroxyl calcium phosphate to the phosphoric acid to the hydrophobic silane coupling agent is 8:15: 2;
(2) adding diatomite into water for dispersion, continuing to add a surfactant for stirring for 0.5 hour, then adding the hydrophobic silane coupling agent modified calcium hydroxy phosphate obtained in the step (1), continuing to stir for 0.5 hour, and centrifugally drying to obtain modified diatomite; the surfactant is sodium hexadecyl benzene sulfonate; the mass ratio of the diatomite, the water, the surfactant and the hydrophobic silane coupling agent modified calcium hydroxy phosphate is 9:30:2: 3;
(3) uniformly mixing the modified diatomite obtained in the step (2) with attapulgite, titanium dioxide, polyvinyl alcohol, wollastonite powder, a suspension dispersing aid and water to obtain scrub-resistant diatom ooze; the titanium dioxide is anatase titanium dioxide, and the suspension dispersion auxiliary agent is polyacrylamide; the mass ratio of the modified diatomite to the attapulgite to the titanium dioxide to the organic cementing material to the wollastonite powder to the suspension dispersing auxiliary agent to the water is 45:2:4:13:6:1: 65.
Example 5
A preparation method of scrub-resistant diatom ooze comprises the following steps:
(1) adding calcium hydroxy phosphate into phosphoric acid aqueous solution with pH =4, stirring and dispersing, adding a hydrophobic silane coupling agent, stirring and reacting for 6 hours at 85 ℃, adjusting pH =7, and centrifugally washing to obtain hydrophobic silane coupling agent modified calcium hydroxy phosphate; the hydrophobic silane coupling agent is octyl trichlorosilane; the mass ratio of the hydroxyl calcium phosphate to the phosphoric acid to the hydrophobic silane coupling agent is 9:13: 2;
(2) adding diatomite into water for dispersion, continuing to add a surfactant for stirring for 1 hour, then adding the hydrophobic silane coupling agent modified calcium hydroxy phosphate obtained in the step (1), continuing to stir for 1 hour, and centrifugally drying to obtain modified diatomite; the surfactant is hexaalkyl ammonium bromide; the mass ratio of the diatomite, the water, the surfactant and the hydrophobic silane coupling agent modified calcium hydroxy phosphate is 9:35:1: 2;
(3) uniformly mixing the modified diatomite obtained in the step (2) with attapulgite, titanium dioxide, polyvinyl alcohol, wollastonite powder, a suspension dispersing aid and water to obtain scrub-resistant diatom ooze; the titanium dioxide is anatase titanium dioxide, and the suspension dispersion auxiliary agent is polyacrylamide; the mass ratio of the modified diatomite to the attapulgite to the titanium dioxide to the organic cementing material to the wollastonite powder to the suspension dispersing auxiliary agent to the water is 45:4:3:14:7:1: 70.
Example 6
A preparation method of scrub-resistant diatom ooze comprises the following steps:
(1) adding calcium hydroxy phosphate into phosphoric acid aqueous solution with pH =4, stirring and dispersing, adding a hydrophobic silane coupling agent, stirring and reacting for 6 hours at 80 ℃, adjusting pH =7, and centrifugally washing to obtain hydrophobic silane coupling agent modified calcium hydroxy phosphate; the hydrophobic silane coupling agent is octadecyl trichlorosilane; the mass ratio of the calcium hydroxy phosphate to the phosphoric acid to the hydrophobic silane coupling agent is 9:14: 3;
(2) adding diatomite into water for dispersion, continuing to add a surfactant for stirring for 1 hour, then adding the hydrophobic silane coupling agent modified calcium hydroxy phosphate obtained in the step (1), continuing to stir for 0.5 hour, and centrifugally drying to obtain modified diatomite; the surfactant is cetyl ammonium bromide; the mass ratio of the diatomite, the water, the surfactant and the hydrophobic silane coupling agent modified calcium hydroxy phosphate is 7:30:1: 3;
(3) uniformly mixing the modified diatomite obtained in the step (2) with attapulgite, titanium dioxide, polyvinyl alcohol, wollastonite powder, a suspension dispersing aid and water to obtain scrub-resistant diatom ooze; the titanium dioxide is anatase titanium dioxide, and the suspension dispersion auxiliary agent is polymaleic acid; the mass ratio of the modified diatomite to the attapulgite to the titanium dioxide to the organic cementing material to the wollastonite powder to the suspension dispersing auxiliary agent to the water is 50:5:4:14:6:1: 75.
Comparative example 1
Calcium hydroxy phosphate was not added, and the rest was the same as in example 1.
And (3) performance testing:
the diatom ooze prepared in example 1 and comparative example 1 was tested according to the GB/T9266-2009 standard.
The test method comprises the following steps: and coating the diatom ooze on the surface of a 1 x 1m glass plate, drying to form a coating film, brushing the diatom ooze-coated glass plate by using a brush, dropwise adding 2mL of water once per brush until the substrate is exposed, and recording the brushing times. Wherein the coating amount of the diatom ooze is 420g/m 2. The detection results are shown in table 1:
table 1:
| performance testing | Washing resistance (times) |
| Comparative example 1 | Bottom exposed for 220 times of washing |
| Example 1 | Washing 800 times without exposing bottom |
As can be seen from the results of table 1, the diatom ooze prepared by the invention has superior scrub resistance compared with the comparative example when the diatom ooze is used for scrubbing the unexposed bottom for 800 times. The obtained diatom ooze product is greatly improved in scrubbing resistance by modifying the diatomite with the calcium hydroxy phosphate.
Claims (10)
1. The preparation method of the scrub-resistant diatom ooze is characterized by comprising the following steps:
(1) adding calcium hydroxy phosphate into phosphoric acid aqueous solution with pH =4, stirring and dispersing, adding a hydrophobic silane coupling agent, stirring and reacting for 5-6 hours at 75-85 ℃, adjusting pH =7, and centrifugally washing to obtain hydrophobic silane coupling agent modified calcium hydroxy phosphate;
(2) adding diatomite into water for dispersion, then continuously adding a surfactant and stirring for 0.5-1 hour, then adding the hydrophobic silane coupling agent modified calcium hydroxy phosphate obtained in the step (1) and continuously stirring for 0.5-1 hour, and centrifugally drying to obtain modified diatomite;
(3) and (3) uniformly mixing the modified diatomite obtained in the step (2) with attapulgite, titanium dioxide, an organic cementing material, wollastonite powder, a suspension dispersing aid and water to obtain the scrub-resistant diatom ooze.
2. The method for preparing the scrub resistant diatom ooze according to claim 1, wherein the hydrophobic silane coupling agent in step (1) is at least one of methyldimethoxysilane, vinyltriethoxysilane, octadecyltrichlorosilane and octyltrichlorosilane.
3. The method for preparing the scrub-resistant diatom ooze according to claim 1, wherein the mass ratio of the calcium hydroxy phosphate, the phosphoric acid and the hydrophobic silane coupling agent in step (1) is 5-10: 10-15: 1-3.
4. The method according to claim 1, wherein the surfactant in step (2) is at least one of sodium hexadecyl sulfonate, ammonium hexadecyl bromide and sodium hexadecyl benzene sulfonate.
5. The method for preparing the scrub-resistant diatom ooze according to claim 1 or 4, wherein the mass ratio of the diatomite, the water, the surfactant and the hydrophobic silane coupling agent modified calcium hydroxy phosphate in the step (2) is 5-10: 15-40: 0.5-2: 1-3.
6. The method for preparing the scrub resistant diatom ooze of claim 1, wherein said titanium dioxide in step (3) is anatase titanium dioxide.
7. The method for preparing the scrub resistant diatom ooze according to claim 1, wherein said organic gelling material in step (3) is polyvinyl alcohol.
8. The method for preparing the scrub resistant diatom ooze according to claim 1, wherein the suspending and dispersing aid in step (3) is at least one of polymaleic acid, polyacrylamide and polyethylene glycol.
9. The preparation method of the scrub-resistant diatom ooze according to claim 1, wherein the mass ratio of the modified diatomite, the attapulgite, the titanium dioxide, the organic cementing material, the wollastonite powder, the suspension dispersing auxiliary agent and the water in the step (3) is 35-50: 0.5-5: 3-5: 10-15: 3-8: 0.1-2: 50-80.
10. A scrub resistant diatom ooze prepared by the method of any one of claims 1-9.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150208660A1 (en) * | 2011-10-25 | 2015-07-30 | Jack L. Mathis | Silane Modified Diatomaceous Earth Mechanical Insecticide |
| CN105645861A (en) * | 2015-12-30 | 2016-06-08 | 重庆发顺化工有限责任公司 | Scrub resistant diatom ooze coating |
| CN107244878A (en) * | 2017-05-23 | 2017-10-13 | 欧亚绿邦（北京）科技有限公司 | High scrubbing resistance diatom ooze and preparation method thereof |
| CN108117343A (en) * | 2016-11-28 | 2018-06-05 | 台州市壁灵宝建材科技有限公司 | Scrubbing resistance diatom ooze |
| CN110590227A (en) * | 2019-10-08 | 2019-12-20 | 深圳市寒暑科技新能源有限公司 | Diatom ooze capable of efficiently and durably removing formaldehyde and preparation method thereof |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150208660A1 (en) * | 2011-10-25 | 2015-07-30 | Jack L. Mathis | Silane Modified Diatomaceous Earth Mechanical Insecticide |
| CN105645861A (en) * | 2015-12-30 | 2016-06-08 | 重庆发顺化工有限责任公司 | Scrub resistant diatom ooze coating |
| CN108117343A (en) * | 2016-11-28 | 2018-06-05 | 台州市壁灵宝建材科技有限公司 | Scrubbing resistance diatom ooze |
| CN107244878A (en) * | 2017-05-23 | 2017-10-13 | 欧亚绿邦（北京）科技有限公司 | High scrubbing resistance diatom ooze and preparation method thereof |
| CN110590227A (en) * | 2019-10-08 | 2019-12-20 | 深圳市寒暑科技新能源有限公司 | Diatom ooze capable of efficiently and durably removing formaldehyde and preparation method thereof |
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