CN112552763A - Preparation method of diatom ooze coating - Google Patents
Preparation method of diatom ooze coating Download PDFInfo
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- CN112552763A CN112552763A CN202110011928.XA CN202110011928A CN112552763A CN 112552763 A CN112552763 A CN 112552763A CN 202110011928 A CN202110011928 A CN 202110011928A CN 112552763 A CN112552763 A CN 112552763A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/08—Copolymers of styrene
- C09D125/14—Copolymers of styrene with unsaturated esters
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to a preparation method of a diatom ooze coating, and belongs to the technical field of building coatings. The invention self-prepares the polymer microsphere and the high-activity calcined substance, adds the polymer microsphere and the high-activity calcined substance into the diatom ooze coating, can effectively increase the combination effect of the calcined substance and the diatom ooze through the microsphere in the use process, can effectively stimulate the performance of the diatom ooze by utilizing the high-activity performance in the calcined substance, increases the coating effect, improves the mildew resistance, simultaneously increases the water retention and water absorption performance on the basis of increasing the bonding effect by utilizing the combination of the polymer microsphere and the surface of the diatom ooze, and effectively solves the problems of low bonding property and poor mildew resistance of the diatom ooze coating.
Description
Technical Field
The invention relates to a preparation method of a diatom ooze coating, and belongs to the technical field of building coatings.
Background
The construction of the wall body is particularly important after finishing the household blank in the field of building and household, so that the wall material can be selected. The wall material is a material for treating a common mortar surface in wall painting construction. Today people are faced with not only possible pollution in public places but also pollution from private persons and even the human body itself. At present, people have higher and higher decoration requirements, and used wall materials are more and more expensive, but most of the existing decoration wall materials contain organic chemical glue or other adhesives, contain pollutants harmful to human bodies, seriously threaten the health of people, and because decoration pollution causes frequent occurrence of body discomfort phenomena such as dizziness and nausea of residents, serious residents seriously threaten the life safety of the residents.
The diatom ooze is an interior wall environment-friendly decorative wall material taking diatomite as a main raw material. It has the functions of eliminating formaldehyde, purifying air, regulating humidity, releasing negative oxygen ion, preventing fire, retarding fire, self-cleaning wall, sterilizing, deodorizing, etc. However, the aggregate adopted by the existing diatom ooze decorative wall material is quartz stone or dolomite, the specific surface area is small, and the moisture absorption and release performance and the air purification performance are very low. The crack-resistant fiber of the existing product has large plasticity and insufficient strength, and can crack after being coated on a wall for a long time. The cellulose fiber is easy to breed mould, the adopted antibacterial agent is slaked lime, the slaked lime slowly reacts with carbon dioxide in the air to generate calcium carbonate, the antibacterial performance is lost after a certain time, and the indoor air quality is affected due to the fact that the steam partial pressure of the organic antibacterial agent is small but has certain toxicity. In addition, the existing product only takes diatomite as a formaldehyde catching agent, and the diatomite adsorption is a dynamic equilibrium process of desorption and adsorption and is released while adsorbing. Therefore, the diatom ooze decorative wall material applied in the actual application is not ideal, and has the problems of low adhesion and poor mildew resistance.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problems of low caking property and poor mildew resistance of the diatom ooze coating, the preparation method of the diatom ooze coating is provided.
In order to solve the technical problems, the invention adopts the following technical scheme:
a preparation method of diatom ooze coating comprises the following steps:
(1) grinding the mixed protein liquid, the auxiliary materials and the ethanol solution according to the mass ratio of 7: 3-5: 10-13, collecting the ground material, freezing the ground material at-70 to-60 ℃, collecting the frozen material, and heating and dissolving the frozen material and the mixed solvent according to the mass ratio of 4: 10-13;
(2) after dissolving, cooling to room temperature, adding a cross-linking agent with the mass of 5-8% of that of the frozen material, stirring, standing at-30 to-20 ℃, freeze-drying, crushing, sieving, and collecting sieved particles for later use;
(3) mixing the barium chloride solution with sodium bicarbonate according to the mass ratio of 7-9: 2, standing, filtering, washing, collecting washings, uniformly mixing the washings, the mixture and urea according to the mass ratio of 9:2: 0.3-0.5, calcining, and collecting the calcined substances;
(4) and (3) mixing the calcined substance, the diatomite and the screened particles for later use in the step (2) according to the mass ratio of 6-8: 15-20: 9-11 to obtain a main material, and stirring and mixing 120 parts of mixed solution, 40-60 parts of main material, 3-5 parts of thickening agent and 1-3 parts of flatting agent according to the parts by weight to obtain the diatom ooze coating.
The preparation method of the mixed protein liquid in the step (1) comprises the steps of carrying out ball milling on the silkworm cocoons, the edible fly maggots and water according to the mass ratio of 9: 3-5: 4, collecting ball milling materials, heating the ball milling materials and sodium carbonate according to the mass ratio of 1: 4-6, filtering, collecting filter residues, and mixing the filter residues and a lithium bromide solution according to the mass ratio of 3: 5-7 to obtain the mixed protein liquid.
The auxiliary materials in the step (1) are prepared by mixing cyclodextrin and chitosan according to the mass ratio of 3: 1-4.
The mixed solvent in the step (1) is formed by mixing acetone and methanol according to the volume ratio of 7: 2-4.
In the step (2), the cross-linking agent is any one of genipin and glutaraldehyde.
The mixture in the step (3) is formed by mixing iron oxyhydroxide and phosphorus oxide in a ratio of 8: 3-5.
The mixed liquid in the step (4) is formed by mixing styrene-acrylic emulsion and acrylic emulsion according to the volume ratio of 3: 1-4,
and (4) the thickening agent is any one of methyl cellulose, sodium starch phosphate and sodium carboxymethyl cellulose.
The leveling agent in the step (4) is any one of polydimethylsiloxane and polymethylphenylsiloxane.
Compared with other methods, the method has the beneficial technical effects that:
(1) the invention takes silkworm cocoons and edible fly maggots as basic raw materials, fully mixes the protein in the raw materials by ball milling, degumms by using sodium carbonate, dissolves the protein by using a lithium bromide solution, fully disperses the protein, then mixes the protein with auxiliary materials, and crosslinks the raw materials under the action of a crosslinking agent to form high-molecular microspheres, so that effective mildew-proof treatment can be carried out on the protein in the raw materials, and meanwhile, when the protein in the raw materials is degraded in the using process, polypeptide is formed, and a continuous mildew-proof effect can be achieved;
(2) mixing a barium chloride solution with sodium bicarbonate to form a barium carbonate colloid, mixing the barium carbonate colloid with the mixture, calcining the barium carbonate colloid to form needle-shaped barium ferrite ferric oxide in the calcining process, wherein the needle-shaped barium ferrite ferric oxide has good activity and can well increase the performance of diatomite;
(3) in the use, can have effectively to increase the combination effect to calcination thing, diatomaceous earth through the microballon, recycle the high activity performance in the calcination thing, can effectively stimulate the performance of diatomaceous earth, increase the coating effect, improve the mould proof nature, utilize the combination of polymer microballon and diatomaceous earth surface simultaneously, on the basis of increasing bonding effect, increased and kept water and water absorption ability.
Detailed Description
The preparation method of the mixed protein liquid comprises the steps of carrying out ball milling on silkworm cocoons, edible fly maggots and water according to the mass ratio of 9: 3-5: 4 at a speed of 600r/min for 1h, collecting ball milling matters, heating the ball milling matters and sodium carbonate according to the mass ratio of 1: 4-6 at 80 ℃ for 3h, filtering, collecting filter residues, and mixing the filter residues and 0.3mol/L lithium bromide solution according to the mass ratio of 3: 5-7 to obtain the mixed protein liquid.
The auxiliary material is prepared by mixing cyclodextrin and chitosan according to the mass ratio of 3: 1-4.
The mixed solvent is formed by mixing acetone and methanol according to the volume ratio of 7: 2-4.
The cross-linking agent is any one of genipin and glutaraldehyde.
The mixture is formed by mixing iron oxyhydroxide and phosphorus oxide 8: 3-5.
The mixed liquid is formed by mixing styrene-acrylic emulsion and acrylic emulsion according to the volume ratio of 3: 1-4,
the thickener is any one of methylcellulose, sodium starch phosphate and sodium carboxymethylcellulose.
The leveling agent is any one of polydimethylsiloxane and polymethylphenylsiloxane.
A preparation method of diatom ooze coating comprises the following steps:
(1) grinding the mixed protein liquid, the auxiliary materials and 1.3mol/L ethanol solution according to the mass ratio of 7: 3-5: 10-13 at 700r/min for 2h, collecting the ground material, freezing the ground material at-70 to-60 ℃ for 2h, collecting the frozen material, and heating and dissolving the frozen material and the mixed solvent according to the mass ratio of 4: 10-13;
(2) after dissolving, cooling to room temperature, adding a cross-linking agent with the mass of 5-8% of that of the frozen material, stirring for 2h, standing for 1h at-30 to-20 ℃, freeze-drying, crushing, sieving with a 100-mesh sieve, and collecting sieved particles for later use;
(3) mixing a barium chloride solution with the mass fraction of 20% with sodium bicarbonate according to the mass ratio of 7-9: 2, standing for 2-4 h, filtering, washing with hot water, collecting washings, uniformly mixing the washings, the mixture and urea according to the mass ratio of 9:2: 0.3-0.5, calcining at the temperature of 600-;
(4) and (3) mixing the calcined substance, the diatomite and the screened particles for later use in the step (2) according to the mass ratio of 6-8: 15-20: 9-11 to obtain a main material, and stirring and mixing 120 parts of mixed solution, 40-60 parts of main material, 3-5 parts of thickening agent and 1-3 parts of flatting agent according to the parts by weight to obtain the diatom ooze coating.
Example 1
The preparation method of the mixed protein liquid comprises the steps of carrying out ball milling on silkworm cocoons, edible fly maggots and water according to the mass ratio of 9:5:4 at a speed of 600r/min for 1h, collecting ball milling matters, heating the ball milling matters and sodium carbonate according to the mass ratio of 1:6 at a temperature of 80 ℃ for 3h, filtering, collecting filter residues, and mixing the filter residues with 0.3mol/L lithium bromide solution according to the mass ratio of 3:7 to obtain the mixed protein liquid.
The auxiliary material is prepared by mixing cyclodextrin and chitosan according to the mass ratio of 3: 4.
The mixed solvent is formed by mixing acetone and methanol according to the volume ratio of 7: 4.
The cross-linking agent is glutaraldehyde.
The mixture is formed by mixing iron oxyhydroxide and phosphorus oxide 8: 5.
The mixed liquid is formed by mixing styrene-acrylic emulsion and acrylic emulsion according to the volume ratio of 3:4,
the thickener is sodium carboxymethyl cellulose.
The leveling agent is polydimethylsiloxane.
A preparation method of diatom ooze coating comprises the following steps:
(1) grinding the mixed protein liquid, the auxiliary materials and 1.3mol/L ethanol solution according to the mass ratio of 7:5:13 at 700r/min for 2h, collecting the ground material, freezing the ground material at-60 ℃ for 2h, collecting the frozen material, and heating and dissolving the frozen material and the mixed solvent according to the mass ratio of 4: 13;
(2) after dissolving, cooling to room temperature, adding a cross-linking agent with the mass of 8% of the frozen substance, stirring for 2h, standing at-20 ℃ for 1h, freeze-drying, crushing, sieving with a 100-mesh sieve, and collecting sieved particles for later use;
(3) mixing a barium chloride solution with the mass fraction of 20% with sodium bicarbonate according to the mass ratio of 9:2, standing for 4 hours, filtering, washing with hot water, collecting washings, uniformly mixing the washings, the mixture and urea according to the mass ratio of 9:2:0.5, calcining at 800 ℃ for 3 hours, and collecting the calcined substances;
(4) and (3) mixing the calcined substance, the diatomite and the sieved particles for later use in the step (2) according to a mass ratio of 8:20:11 to obtain a main material, and stirring and mixing 130 parts of mixed solution, 60 parts of main material, 5 parts of thickening agent and 3 parts of leveling agent according to parts by weight to obtain the diatom ooze coating.
Example 2
The preparation method of the mixed protein liquid comprises the steps of carrying out ball milling on silkworm cocoons, edible fly maggots and water according to the mass ratio of 9:4:4 at a speed of 600r/min for 1h, collecting ball milling matters, heating the ball milling matters and sodium carbonate according to the mass ratio of 1:5 at a temperature of 80 ℃ for 3h, filtering, collecting filter residues, and mixing the filter residues with 0.3mol/L lithium bromide solution according to the mass ratio of 3:6 to obtain the mixed protein liquid.
The auxiliary material is prepared by mixing cyclodextrin and chitosan according to the mass ratio of 3: 2.
The mixed solvent is formed by mixing acetone and methanol according to the volume ratio of 7: 3.
The cross-linking agent is genipin.
The mixture is formed by mixing iron oxyhydroxide and phosphorus oxide 8: 4.
The mixed liquid is formed by mixing styrene-acrylic emulsion and acrylic emulsion according to the volume ratio of 3:3,
the thickening agent is sodium starch phosphate.
The leveling agent is polymethylphenylsiloxane.
A preparation method of diatom ooze coating comprises the following steps:
(1) grinding the mixed protein liquid, the auxiliary materials and 1.3mol/L ethanol solution according to the mass ratio of 7:4:11 at 700r/min for 2h, collecting the ground material, freezing the ground material at-65 ℃ for 2h, collecting the frozen material, and heating and dissolving the frozen material and the mixed solvent according to the mass ratio of 4: 11;
(2) after dissolving, cooling to room temperature, adding a cross-linking agent with the mass of 7% of the frozen substance, stirring for 2h, standing at-25 ℃ for 1h, freeze-drying, crushing, sieving with a 100-mesh sieve, and collecting sieved particles for later use;
(3) mixing a barium chloride solution with the mass fraction of 20% with sodium bicarbonate according to the mass ratio of 8:2, standing for 3h, filtering, washing with hot water, collecting washings, uniformly mixing the washings, the mixture and urea according to the mass ratio of 9:2:0.4, calcining at 700 ℃ for 3h, and collecting the calcined substance;
(4) and (3) mixing the calcined substance, the diatomite and the sieved particles for later use in the step (2) according to a mass ratio of 7:18:10 to obtain a main material, and stirring and mixing 125 parts of mixed solution, 50 parts of main material, 4 parts of thickening agent and 2 parts of flatting agent according to parts by weight to obtain the diatom ooze coating.
Example 3
The preparation method of the mixed protein liquid comprises the steps of carrying out ball milling on silkworm cocoons, edible fly maggots and water according to the mass ratio of 9:3:4 at a speed of 600r/min for 1h, collecting ball milling matters, heating the ball milling matters and sodium carbonate according to the mass ratio of 1:4 at a temperature of 80 ℃ for 3h, filtering, collecting filter residues, and mixing the filter residues with 0.3mol/L lithium bromide solution according to the mass ratio of 3:5 to obtain the mixed protein liquid.
The auxiliary material is prepared by mixing cyclodextrin and chitosan according to the mass ratio of 3: 1.
The mixed solvent is formed by mixing acetone and methanol according to the volume ratio of 7: 2.
The cross-linking agent is genipin.
The mixture is formed by mixing iron oxyhydroxide and phosphorus oxide 8: 3.
The mixed liquid is formed by mixing styrene-acrylic emulsion and acrylic emulsion according to the volume ratio of 3:1,
the thickening agent is methyl cellulose.
The leveling agent is polydimethylsiloxane.
A preparation method of diatom ooze coating comprises the following steps:
(1) grinding the mixed protein liquid, the auxiliary materials and 1.3mol/L ethanol solution according to the mass ratio of 7:3:10 at 700r/min for 2h, collecting the ground material, freezing the ground material at-70 ℃ for 2h, collecting the frozen material, and heating and dissolving the frozen material and the mixed solvent according to the mass ratio of 4: 10;
(2) after dissolving, cooling to room temperature, adding a cross-linking agent with the mass of 5% of that of the frozen material, stirring for 2h, standing at-30 ℃ for 1h, freeze-drying, crushing, sieving with a 100-mesh sieve, and collecting sieved particles for later use;
(3) mixing a barium chloride solution with the mass fraction of 20% with sodium bicarbonate according to the mass ratio of 7:2, standing for 2h, filtering, washing with hot water, collecting washings, uniformly mixing the washings, the mixture and urea according to the mass ratio of 9:2:0.3, calcining at 600 ℃ for 3h, and collecting the calcined substance;
(4) and (3) mixing the calcined substance, the diatomite and the sieved particles for later use in the step (2) according to a mass ratio of 6:15:9 to obtain a main material, and stirring and mixing 120 parts of mixed solution, 40 parts of main material, 3 parts of thickening agent and 1 part of leveling agent according to parts by weight to obtain the diatom ooze coating.
Comparative example 1
The auxiliary material is prepared by mixing cyclodextrin and chitosan according to the mass ratio of 3: 2.
The mixed solvent is formed by mixing acetone and methanol according to the volume ratio of 7: 3.
The cross-linking agent is genipin.
The mixture is formed by mixing iron oxyhydroxide and phosphorus oxide 8: 4.
The mixed liquid is formed by mixing styrene-acrylic emulsion and acrylic emulsion according to the volume ratio of 3:3,
the thickening agent is sodium starch phosphate.
The leveling agent is polymethylphenylsiloxane.
A preparation method of diatom ooze coating comprises the following steps:
(1) grinding the auxiliary materials and 1.3mol/L ethanol solution at a mass ratio of 4:11 at 700r/min for 2h, collecting the ground materials, freezing the ground materials at-65 ℃ for 2h, collecting the frozen materials, and heating and dissolving the frozen materials and the mixed solvent at a mass ratio of 4: 11;
(2) after dissolving, cooling to room temperature, adding a cross-linking agent with the mass of 7% of the frozen substance, stirring for 2h, standing at-25 ℃ for 1h, freeze-drying, crushing, sieving with a 100-mesh sieve, and collecting sieved particles for later use;
(3) mixing a barium chloride solution with the mass fraction of 20% with sodium bicarbonate according to the mass ratio of 8:2, standing for 3h, filtering, washing with hot water, collecting washings, uniformly mixing the washings, the mixture and urea according to the mass ratio of 9:2:0.4, calcining at 700 ℃ for 3h, and collecting the calcined substance;
(4) and (3) mixing the calcined substance, the diatomite and the sieved particles for later use in the step (2) according to a mass ratio of 7:18:10 to obtain a main material, and stirring and mixing 125 parts of mixed solution, 50 parts of main material, 4 parts of thickening agent and 2 parts of flatting agent according to parts by weight to obtain the diatom ooze coating.
Comparative example 2
The preparation method of the mixed protein liquid comprises the steps of carrying out ball milling on silkworm cocoons, edible fly maggots and water according to the mass ratio of 9:4:4 at a speed of 600r/min for 1h, collecting ball milling matters, heating the ball milling matters and sodium carbonate according to the mass ratio of 1:5 at a temperature of 80 ℃ for 3h, filtering, collecting filter residues, and mixing the filter residues with 0.3mol/L lithium bromide solution according to the mass ratio of 3:6 to obtain the mixed protein liquid.
The auxiliary material is prepared by mixing cyclodextrin and chitosan according to the mass ratio of 3: 2.
The mixed solvent is formed by mixing acetone and methanol according to the volume ratio of 7: 3.
The cross-linking agent is genipin.
The mixed liquid is formed by mixing styrene-acrylic emulsion and acrylic emulsion according to the volume ratio of 3:3,
the thickening agent is sodium starch phosphate.
The leveling agent is polymethylphenylsiloxane.
A preparation method of diatom ooze coating comprises the following steps:
(1) grinding the mixed protein liquid, the auxiliary materials and 1.3mol/L ethanol solution according to the mass ratio of 7:4:11 at 700r/min for 2h, collecting the ground material, freezing the ground material at-65 ℃ for 2h, collecting the frozen material, and heating and dissolving the frozen material and the mixed solvent according to the mass ratio of 4: 11;
(2) after dissolving, cooling to room temperature, adding a cross-linking agent with the mass of 7% of the frozen substance, stirring for 2h, standing at-25 ℃ for 1h, freeze-drying, crushing, sieving with a 100-mesh sieve, and collecting sieved particles for later use;
(3) mixing a barium chloride solution with the mass fraction of 20% with sodium bicarbonate according to the mass ratio of 8:2, standing for 3h, filtering, washing with hot water, collecting washings, uniformly mixing the washings and urea according to the mass ratio of 9:0.4, calcining for 3h at 700 ℃, and collecting the calcined substances;
(4) and (3) mixing the calcined substance, the diatomite and the sieved particles for later use in the step (2) according to a mass ratio of 7:18:10 to obtain a main material, and stirring and mixing 125 parts of mixed solution, 50 parts of main material, 4 parts of thickening agent and 2 parts of flatting agent according to parts by weight to obtain the diatom ooze coating.
Comparative example 3
Commercially available diatom ooze coating.
The diatom ooze paints of examples 1-3 and comparative examples 1-3 were tested:
and (3) testing the escherichia coli bacteriostasis rate, and performing performance detection according to the GB/T20944.2-2007 regulation.
The test of the staphylococcus aureus is carried out according to the regulation of GB/T20944.2-2007.
Water resistance test method: respectively and uniformly coating the diatom ooze coating on glass substrates with the same size according to the same coating amount, placing the glass substrates in hot water at 40-50 ℃ after the diatom ooze coating is naturally dried and cured, taking out the glass substrates after 96 hours, and observing the surface condition of the coating.
And (3) mildew condition: the paints of examples 1 to 3 and comparative example were applied to the surface of a square, and the area of the applied paint was 1m2When painting, the painting thickness is kept consistent, after painting, the paint is placed in an environment with the relative humidity of 70-80% and the temperature of 30-40 ℃ for standing for 2 weeks, the average mildew area ratio of the surface of the coating is calculated, the average mildew area ratio is the ratio of the average mildew area in the unit area of the coating to the average mildew area in the unit area of the coating of the comparative example, and the detection results are shown in a table 1:
TABLE 1
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Average area ratio of mildew | No abnormality | No abnormality | No abnormality | Slight whitening | Slight whitening | Slight whitening |
| Escherichia coli inhibitory rate (%) | 98.23 | 99.16 | 98.56 | 90.23 | 96.32 | 94.28 |
| Staphylococcus aureus (%) | 98.93 | 99.68 | 99.21 | 91.03 | 96.22 | 95.01 |
The diatom ooze paints of examples 1-3 and comparative examples 1-3 were tested for their performance, and the results are shown in Table 2:
TABLE 2
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Adhesive Strength (MPa) | 1.69 | 1.76 | 1.73 | 1.12 | 1.03 | 0.83 |
| Water absorption (g/m)2） | 86 | 91 | 88 | 82 | 84 | 73 |
In conclusion, the diatom ooze coating prepared by the application obtains better performance.
Claims (9)
1. The preparation method of the diatom ooze coating is characterized by comprising the following steps of:
(1) grinding the mixed protein liquid, the auxiliary materials and the ethanol solution according to the mass ratio of 7: 3-5: 10-13, collecting the ground material, freezing the ground material at-70 to-60 ℃, collecting the frozen material, and heating and dissolving the frozen material and the mixed solvent according to the mass ratio of 4: 10-13;
(2) after dissolving, cooling to room temperature, adding a cross-linking agent with the mass of 5-8% of that of the frozen material, stirring, standing at-30 to-20 ℃, freeze-drying, crushing, sieving, and collecting sieved particles for later use;
(3) mixing the barium chloride solution with sodium bicarbonate according to the mass ratio of 7-9: 2, standing, filtering, washing, collecting washings, uniformly mixing the washings, the mixture and urea according to the mass ratio of 9:2: 0.3-0.5, calcining, and collecting the calcined substances;
(4) and (3) mixing the calcined substance, the diatomite and the screened particles for later use in the step (2) according to the mass ratio of 6-8: 15-20: 9-11 to obtain a main material, and stirring and mixing 120 parts of mixed solution, 40-60 parts of main material, 3-5 parts of thickening agent and 1-3 parts of flatting agent according to the parts by weight to obtain the diatom ooze coating.
2. The preparation method of the diatom ooze coating of claim 1, wherein the preparation method of the mixed protein liquid in step (1) is that the silkworm cocoon, the edible fly maggot and water are ball-milled according to the mass ratio of 9: 3-5: 4, the ball-milled material is collected, the ball-milled material and sodium carbonate are heated according to the mass ratio of 1: 4-6, the filtration is carried out, the filter residue is collected, and the filter residue and the lithium bromide solution are mixed according to the mass ratio of 3: 5-7, so that the mixed protein liquid is obtained.
3. The preparation method of the diatom ooze coating according to claim 1, wherein the auxiliary materials in step (1) are prepared by mixing cyclodextrin and chitosan according to a mass ratio of 3: 1-4.
4. The preparation method of the diatom ooze coating according to claim 1, wherein the mixed solvent in step (1) is a mixture of acetone and methanol in a volume ratio of 7: 2-4.
5. The method for preparing diatom ooze coating according to claim 1, wherein in step (2) the cross-linking agent is any one of genipin and glutaraldehyde.
6. The preparation method of the diatom ooze coating according to claim 1, wherein the mixture in step (3) is a mixture of iron oxyhydroxide and phosphorus oxide in a ratio of 8: 3-5.
7. The preparation method of the diatom ooze coating according to claim 1, wherein the mixed solution in step (4) is prepared by mixing styrene-acrylic emulsion and acrylic emulsion according to a volume ratio of 3: 1-4.
8. The method for preparing diatom ooze coating according to claim 1, wherein in step (4) the thickening agent is any one of methyl cellulose, sodium starch phosphate and sodium carboxymethyl cellulose.
9. The method for preparing diatom ooze coating according to claim 1, wherein in step (4), the leveling agent is either polydimethylsiloxane or polymethylphenylsiloxane.
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