CN114736545B - Inorganic coating with moisture absorption and dryness reduction functions - Google Patents
Inorganic coating with moisture absorption and dryness reduction functions Download PDFInfo
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention belongs to the technical field of inorganic coatings, and particularly discloses an inorganic coating with moisture absorption and dryness reduction functions, which comprises the following raw materials in parts by weight: 35-45 parts of modified oyster shell powder, 3-6 parts of sodium dodecyl sulfate, 3-7 parts of calcium titanate, 1-4 parts of rosin resin powder, 4-9 parts of modified nano aluminum oxide, 1-3 parts of micro silicon powder, 0.6-0.9 part of dispersing agent, 1-3 parts of silicon triphosphate and 40-50 parts of water. The inorganic coating takes the modified oyster shell powder as a main material, and the moisture absorption and dryness reduction effects of the coating can be enhanced through the mutual cooperation of the sodium dodecyl sulfate, the calcium titanate, the rosin resin powder, the modified nano aluminum oxide, the micro silicon powder and other raw materials; the modified nano-alumina has synergistic effect with the modified oyster shell powder after being modified, and can obviously enhance the moisture releasing property of the coating, thereby improving the long-term moisture absorption and drying efficiency of the product.
Description
Technical Field
The invention relates to the technical field of inorganic coatings, in particular to an inorganic coating with moisture absorption and dryness reduction functions.
Background
The inorganic coating is a coating which takes inorganic materials as main film forming substances, is a short name of all-inorganic mineral coatings, and is widely applied to the daily life fields of buildings, paintings and the like due to high performance. The inorganic coating is an inorganic polymer coating which is composed of inorganic polymer, metal subjected to dispersion activation, metal oxide nano material and rare earth ultrafine powder, can quickly react with iron atoms on the surface of a steel structure to generate an inorganic polymer anticorrosive coating which has physical and chemical double protection effects and is firmly combined with a matrix through a chemical bond, has no pollution to the environment, long service life and anticorrosive performance reaching the international advanced level, and is a high-tech upgrading product meeting the requirement of environmental protection.
The existing inorganic coating is used for the inner wall of a building, the calcium oxide is mostly added as a moisture absorbent for moisture absorption treatment, the moisture absorption efficiency is poor, the moisture absorption is unstable, and the moisture absorption effect is easily influenced.
Disclosure of Invention
In view of the defects of the prior art, the present invention aims to provide an inorganic coating with moisture absorption and dryness reduction functions to solve the problems in the background art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides an inorganic coating with moisture absorption and dryness reduction functions, which comprises the following raw materials in parts by weight:
35-45 parts of modified oyster shell powder, 3-6 parts of sodium dodecyl sulfate, 3-7 parts of calcium titanate, 1-4 parts of rosin resin powder, 4-9 parts of modified nano aluminum oxide, 1-3 parts of micro silicon powder, 0.6-0.9 part of dispersing agent, 1-3 parts of silicon triphosphate and 40-50 parts of water.
Preferably, the inorganic coating comprises the following raw materials in parts by weight:
40 parts of modified oyster shell powder, 4.5 parts of sodium dodecyl sulfate, 5 parts of calcium titanate, 2.5 parts of rosin resin powder, 6.5 parts of modified nano-alumina, 2 parts of micro silicon powder, 0.75 part of dispersing agent, 2 parts of silicon tripolyphosphate and 45 parts of water.
Preferably, the modification method of the modified oyster shell powder comprises the following steps:
s11: stirring and mixing 20-30 parts of oyster shell powder in 35-45 parts of rare earth compound agent fully, washing with water, and drying to obtain rare earth compound processed oyster shell powder;
s12: adding hydrochloric acid into deionized water to prepare a hydrochloric acid solution with the mass fraction of 5%, then adding 1-5 parts of bis (dioctyloxy pyrophosphate) ethylene titanate, 1-3 parts of silane coupling agent KH560, 05-0.9 part of additive treating agent and 15-20 parts of bentonite, and fully stirring and mixing to obtain bentonite modified liquid;
s13: adding the rare earth compound processed oyster shell powder into 2-3 times of bentonite modification liquid, stirring, washing with water, and drying to obtain modified oyster shell powder;
s14: and finally calcining at the temperature of 700-800 ℃ for 1-5h, and finishing calcining to obtain the modified oyster shell powder.
Preferably, the preparation method of the rare earth compound agent comprises the following steps:
adding the silica sol into 2-3 times of lanthanum chloride solution, then adding sodium alginate accounting for 5-10% of the total amount of the silica sol and sodium lignosulfonate accounting for 1-5% of the total amount of the silica sol, and fully stirring and mixing to obtain the rare earth compound agent.
The bentonite in the bentonite modified liquid has a layered spacing structure, can cooperate with the oyster shell powder to enhance the moisture absorption and moisture release effects, and the modified oyster shell powder can significantly enhance the moisture absorption and moisture release efficiency of the product through the cooperation improvement of the carbon nano tubes.
Preferably, the mass fraction of the lanthanum chloride solution is 5-10%.
Preferably, the stirring treatment in S13 is performed for 30-40min at the rotation speed of 350-550r/min at the temperature of 75-95 ℃.
Preferably, the additive treating agent is formed by subjecting the carbon nano tube to electron irradiation treatment with power of 150-190W for 10-20 min.
The inventor of the invention finds that the modified oyster shell powder is replaced by oyster shell powder, and the moisture absorption rate effect of the product is obviously deteriorated; the modified oyster shell powder is not treated by a rare earth compound agent, so that the moisture absorption effect of the product is poor;
the inventor of the invention finds that the bentonite modification liquid is replaced by the diatomite modification liquid, the early-stage moisture absorption rate enhancement effect is obvious, but the moisture absorption effect tends to be stable in a period of 20-40h, and the later-stage moisture absorption can be inhibited by using the diatomite;
the carbon nano tube is replaced by graphene, so that the moisture absorption effect of the product is not obvious, and the carbon nano tube plays a role in dispersing the auxiliary agent, so that the modification effect of bentonite on the oyster shell powder is enhanced; the graphene is flaky and is compounded with bentonite, so that the space amount between bentonite layers is influenced, and the moisture absorption effect is further reduced;
the oyster shell powder is modified by different methods, so that the moisture absorption effect is different, but the moisture absorption effect improved by the method can be obviously enhanced;
the modified nano-alumina can achieve synergistic effect and improve the moisture absorption effect of the product.
Preferably, the modification method of the modified nano-alumina comprises the following steps:
s111: adding 10-15 parts of nano aluminum oxide into 75-85 parts of deionized water to prepare suspension;
s112: and adding stearic acid accounting for 5-10% of the total amount and a potassium acetate solution accounting for 1-5% of the total amount into the suspension, stirring and fully dispersing, and finally washing and drying to obtain the modified nano aluminum oxide.
Preferably, the concentration of the potassium acetate solution is 1-1.5 mol/L.
Preferably, the dispersant is one or more of hydroxyethyl cellulose and polyoxyethylene lauryl ether.
The inventor of the invention finds that the moisture absorption efficiency can be improved by modifying the raw materials of the product, but the product is not easy to release after moisture absorption is stable, and the modified nano-alumina can play a significant assisting and synergistic effect, improve the moisture releasing effect of the product and further play a role in reducing the drying efficiency; the carbon nano tube is replaced by graphene, so that the moisture release amount is remarkably reduced, and the product can remarkably improve the moisture absorption and moisture release effects by selecting and modifying the raw materials of the product.
Compared with the prior art, the invention has the following beneficial effects:
the inorganic coating disclosed by the invention takes the modified oyster shell powder as a main material, and the moisture absorption and dryness reduction effects of the coating can be enhanced through the mutual cooperation of the sodium dodecyl sulfate, the calcium titanate, the rosin resin powder, the modified nano-alumina, the micro-silicon powder and other raw materials; the modified nano-alumina has synergistic effect with the modified oyster shell powder after being modified, and can obviously enhance the moisture releasing property of the coating, thereby improving the long-term moisture absorption and drying reduction efficiency of the product.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention of the embodiment provides an inorganic coating with moisture absorption and dryness reduction functions, which comprises the following raw materials in parts by weight:
35-45 parts of modified oyster shell powder, 3-6 parts of sodium dodecyl sulfate, 3-7 parts of calcium titanate, 1-4 parts of rosin resin powder, 4-9 parts of modified nano aluminum oxide, 1-3 parts of micro silicon powder, 0.6-0.9 part of dispersing agent, 1-3 parts of silicon triphosphate and 40-50 parts of water.
The inorganic coating comprises the following raw materials in parts by weight:
40 parts of modified oyster shell powder, 4.5 parts of sodium dodecyl sulfate, 5 parts of calcium titanate, 12.5 parts of rosin resin powder, 6.5 parts of modified nano-alumina, 2 parts of micro silicon powder, 0.75 part of dispersing agent, 2 parts of silicon tripolyphosphate and 45 parts of water.
The modification method of the modified oyster shell powder comprises the following steps:
s11: stirring and mixing 20-30 parts of oyster shell powder in 35-45 parts of rare earth compound agent fully, washing with water, and drying to obtain rare earth compound processed oyster shell powder;
s12: adding hydrochloric acid into deionized water to prepare a hydrochloric acid solution with the mass fraction of 5%, then adding 1-5 parts of bis (dioctyloxy pyrophosphate) ethylene titanate, 1-3 parts of silane coupling agent KH560, 05-0.9 part of additive treating agent and 15-20 parts of bentonite, and fully stirring and mixing to obtain bentonite modified liquid;
s13: adding the rare earth compound processed oyster shell powder into 2-3 times of bentonite modification liquid, stirring, washing with water, and drying to obtain modified oyster shell powder;
s14: and finally calcining at the temperature of 700-800 ℃ for 1-5h, and finishing calcining to obtain the modified oyster shell powder.
The preparation method of the rare earth compound agent of the embodiment comprises the following steps:
adding silica sol into 2-3 times of lanthanum chloride solution, then adding sodium alginate accounting for 5-10% of the total amount of the silica sol and sodium lignosulfonate accounting for 1-5% of the total amount of the silica sol, and fully stirring and mixing to obtain the rare earth compounding agent.
The mass fraction of the lanthanum chloride solution in this example is 5-10%.
In the present embodiment, the stirring process in S13 is performed at a rotation speed of 350-550r/min at 75-95 ℃ for 30-40 min.
The additive treating agent is prepared by subjecting the carbon nanotube to electron irradiation treatment with power of 150-190W for 10-20 min.
The modification method of the modified nano alumina of the embodiment comprises the following steps:
s111: adding 10-15 parts of nano aluminum oxide into 75-85 parts of deionized water to prepare suspension;
s112: and adding stearic acid accounting for 5-10% of the total amount and a potassium acetate solution accounting for 1-5% of the total amount into the suspension, stirring and fully dispersing, and finally washing and drying to obtain the modified nano aluminum oxide.
The concentration of the potassium acetate solution of this example was 1 to 1.5 mol/L.
The dispersant in this embodiment is one or a combination of more of hydroxyethyl cellulose and polyoxyethylene lauryl ether.
Example 1.
The invention of the embodiment provides an inorganic coating with moisture absorption and dryness reduction functions, which comprises the following raw materials in parts by weight:
35 parts of modified oyster shell powder, 3 parts of sodium dodecyl sulfate, 3 parts of calcium titanate, 1 part of rosin resin powder, 4 parts of modified nano aluminum oxide, 1 part of micro silicon powder, 0.6 part of dispersing agent, 1 part of silicon triphosphate and 40 parts of water.
The modification method of the modified oyster shell powder comprises the following steps:
s11: stirring and mixing 20 parts of oyster shell powder in 35 parts of rare earth compound agent fully, washing with water, and drying to obtain rare earth compound processed oyster shell powder;
s12: adding hydrochloric acid into deionized water to prepare a hydrochloric acid solution with the mass fraction of 5%, then adding 1 part of bis (dioctyloxy pyrophosphate) ethylene titanate, 1 part of silane coupling agent KH560, 0.5 part of addition treatment agent and 15 parts of bentonite, and fully stirring and mixing to obtain bentonite modification liquid;
s13: adding the rare earth compound processed oyster shell powder into 2 times of bentonite modification liquid, stirring, washing with water, and drying to obtain modified oyster shell powder;
s14: and finally calcining for 1h at 700 ℃, and finishing calcining to obtain the modified oyster shell powder.
The preparation method of the rare earth compound agent of the embodiment comprises the following steps:
adding the silica sol into 2 times of lanthanum chloride solution, then adding sodium alginate accounting for 5 percent of the total amount of the silica sol and sodium lignosulfonate accounting for 1 percent of the total amount of the silica sol, and fully stirring and mixing to obtain the rare earth compound agent.
The lanthanum chloride solution of this example was 5% by mass.
In the present example, in S13, the mixture was stirred at a rotation speed of 350r/min at 75 ℃ for 30 min.
The additive treating agent of the embodiment is formed by performing electron irradiation treatment on the carbon nano tube for 10min at the power of 150W.
The modification method of the modified nano alumina of the embodiment comprises the following steps:
s111: adding 10 parts of nano alumina into 75 parts of deionized water to prepare a suspension;
s112: and adding stearic acid accounting for 5% of the total amount and a potassium acetate solution accounting for 1% of the total amount into the suspension, stirring and fully dispersing, and finally washing and drying to obtain the modified nano aluminum oxide.
The concentration of the potassium acetate solution of this example was 1 mol/L.
The dispersant of this example was hydroxyethyl cellulose.
Example 2.
The invention of the embodiment provides an inorganic coating with moisture absorption and dryness reduction functions, which comprises the following raw materials in parts by weight:
45 parts of modified oyster shell powder, 6 parts of sodium dodecyl sulfate, 7 parts of calcium titanate, 4 parts of rosin resin powder, 9 parts of modified nano aluminum oxide, 3 parts of micro silicon powder, 0.9 part of dispersing agent, 3 parts of silicon tripolyphosphate and 50 parts of water.
The modification method of the modified oyster shell powder comprises the following steps:
s11: stirring and mixing 30 parts of oyster shell powder in 45 parts of rare earth compound agent fully, washing with water, and drying to obtain rare earth compound processed oyster shell powder;
s12: adding hydrochloric acid into deionized water to prepare a hydrochloric acid solution with the mass fraction of 5%, then adding 5 parts of bis (dioctyloxy pyrophosphate) ethylene titanate, 3 parts of silane coupling agent KH560, 0.9 part of addition treatment agent and 20 parts of bentonite, and fully stirring and mixing to obtain bentonite modified liquid;
s13: adding the rare earth compound processed oyster shell powder into 3 times of bentonite modification liquid, stirring, washing with water, and drying to obtain modified oyster shell powder;
s14: and finally calcining for 5h at 800 ℃, and finishing calcining to obtain the modified oyster shell powder.
The preparation method of the rare earth compound agent of the embodiment comprises the following steps:
adding silica sol into lanthanum chloride solution of which the amount is 3 times that of the lanthanum chloride solution, then adding sodium alginate of which the total amount is 10 percent of the silica sol and sodium lignosulfonate of which the total amount is 5 percent of the silica sol, and fully stirring and mixing to obtain the rare earth compound agent.
The lanthanum chloride solution of this example was 10% by mass.
In the present example, in S13, the mixture was stirred at 95 ℃ and 550r/min for 40 min.
The additive treating agent of the embodiment is prepared by performing electron irradiation treatment on the carbon nano tube with 190W power for 20 min.
The modification method of the modified nano alumina of the embodiment comprises the following steps:
s111: adding 15 parts of nano aluminum oxide into 85 parts of deionized water to prepare suspension;
s112: and adding stearic acid accounting for 10% of the total amount and a potassium acetate solution accounting for 5% of the total amount into the suspension, stirring and fully dispersing, and finally washing and drying to obtain the modified nano aluminum oxide.
The concentration of the potassium acetate solution of this example was 1.5 mol/L.
The dispersant of this example was hydroxyethyl cellulose.
Example 3.
The invention of the embodiment provides an inorganic coating with moisture absorption and dryness reduction functions, which comprises the following raw materials in parts by weight:
40 parts of modified oyster shell powder, 4.5 parts of sodium dodecyl sulfate, 5 parts of calcium titanate, 2.5 parts of rosin resin powder, 6.5 parts of modified nano-alumina, 2 parts of micro silicon powder, 0.75 part of dispersing agent, 2 parts of silicon tripolyphosphate and 45 parts of water.
The modification method of the modified oyster shell powder comprises the following steps:
s11: stirring and mixing 25 parts of oyster shell powder in 40 parts of rare earth compound agent fully, washing with water, and drying to obtain rare earth compound processed oyster shell powder;
s12: adding hydrochloric acid into deionized water to prepare a hydrochloric acid solution with the mass fraction of 5%, then adding 3 parts of bis (dioctyloxy pyrophosphate) ethylene titanate, 2 parts of silane coupling agent KH560, 0.7 part of addition treatment agent and 17.5 parts of bentonite, and fully stirring and mixing to obtain a bentonite modification solution;
s13: adding the rare earth compound processed oyster shell powder into 2.5 times of bentonite modification liquid, stirring, washing with water, and drying to obtain modified oyster shell powder;
s14: and finally calcining for 3h at 750 ℃ to obtain the modified oyster shell powder.
The preparation method of the rare earth compound agent of the embodiment comprises the following steps:
adding the silica sol into 2.5 times of lanthanum chloride solution, then adding sodium alginate accounting for 7.5 percent of the total amount of the silica sol and sodium lignosulfonate accounting for 3 percent of the total amount of the silica sol, and fully stirring and mixing to obtain the rare earth compound agent.
The lanthanum chloride solution of this example was 7.5% by mass.
In the present example, in S13, the stirring treatment was carried out at 80 ℃ and a rotation speed of 400r/min for 35 min.
The additive treating agent of the embodiment is prepared by irradiating the carbon nano tube with electron with power of 170W for 15 min.
The modification method of the modified nano alumina of the embodiment comprises the following steps:
s111: adding 12.5 parts of nano alumina into 80 parts of deionized water to prepare a suspension;
s112: and adding stearic acid accounting for 7.5 percent of the total amount and a potassium acetate solution accounting for 3 percent of the total amount into the suspension, stirring and fully dispersing, and finally washing and drying to obtain the modified nano aluminum oxide.
The concentration of the potassium acetate solution of this example was 1.25 mol/L.
The dispersant in this example is polyoxyethylene lauryl ether.
Comparative example 1.
The difference from the embodiment 3 is that the modified oyster shell powder is replaced by oyster shell powder.
Comparative example 2.
The difference from the embodiment 3 is that the modified oyster shell powder is not treated by a rare earth compound agent.
Comparative example 3.
Different from the embodiment 3, the bentonite modification liquid is replaced by the diatomite modification liquid;
adding hydrochloric acid into deionized water to prepare a hydrochloric acid solution with the mass fraction of 5%, then adding 3 parts of bis (dioctyloxy pyrophosphate) ethylene titanate, 2 parts of silane coupling agent KH560, 0.7 part of addition treatment agent and 17.5 parts of diatomite, and fully stirring and mixing to obtain bentonite modification liquid;
the additive treating agent is prepared by irradiating the carbon nano tube with electron with power of 170W for 15 min.
Comparative example 4.
The difference from example 3 is that the carbon nanotubes in the additive treatment agent are replaced by graphene.
Comparative example 5.
Different from the embodiment 3 in that the modification method of the modified oyster shell powder is different;
calcining oyster shells at 850 ℃ for 4h to obtain a calcined product; and (3) pulverizing the calcined product, dispersing in 2-3 times of deionized water, adding 5-10% hydrochloric acid, washing with water, and drying to obtain the modified oyster shell powder.
Comparative example 6.
Different from the example 3, the modified nano alumina is not added.
Comparative example 7.
Different from the embodiment 3 in the modification method of the modified nano alumina.
S111: adding 12.5 parts of nano alumina into 80 parts of deionized water to prepare a suspension;
s112: and adding hydrochloric acid accounting for 7.5 percent of the total amount and sodium alginate accounting for 5 percent of the total amount into the suspension, stirring and mixing fully, washing with water, and drying to obtain the modified nano-alumina.
Measuring the moisture and heat performance and the moisture absorption performance of the GB/T20312-2006 building material and the product;
the products of examples 1-3 and comparative examples 1-7 were subjected to a performance test;
0.5g of the products of examples 1 to 3 and comparative examples 1 to 7 was placed in a bottle of a saturated aqueous ammonium sulfate solution having a relative humidity of 81%, weighed at regular intervals, and calculated as% moisture absorption%
a = (a 1-a 2)/a 1, wherein a2 is initial mass of paint, and a1 is mass after standing time.
The products of examples 1-3 and comparative examples 1-7 were tested for their performance as follows:
as can be seen from comparative examples 1 to 7 and examples 1 to 3;
the modified oyster shell powder is replaced by oyster shell powder, so that the moisture absorption rate effect of the product is remarkably poor; the modified oyster shell powder is not treated by a rare earth compound agent, so that the moisture absorption effect of the product is poor;
compared with the comparative example 3, the bentonite modification liquid is replaced by the diatomite modification liquid, the early-stage moisture absorption rate enhancement effect is obvious, but the moisture absorption effect tends to be stable in a period of 20-40h, and the later-stage moisture absorption can be inhibited by the use of the diatomite;
as can be seen from the comparative example 4, the carbon nano tube is replaced by graphene, the moisture absorption effect of the product is not obvious, and the carbon nano tube plays a role in dispersing the auxiliary agent and enhancing the modification effect of the bentonite on the oyster shell powder; the graphene is flaky and is compounded with bentonite, so that the space amount between bentonite layers is influenced, and the moisture absorption effect is further reduced;
the modification methods of the oyster shell powder are different, and the moisture absorption effects are different, but the moisture absorption effect improved by the method can be obviously enhanced;
in addition, the modified nano-alumina can play a synergistic effect and improve the moisture absorption effect of the product.
The moisture releasing performance test:
and (3) carrying out a moisture release test on the product tested in the above test, wherein b = (b 1-b 2)/b 1, wherein b2 is the mass of the paint after moisture release is finished, and b1 is the total mass of the paint after 40 hours of moisture absorption.
The invention tests the moisture releasing effect of the product tested after 40 hours;
as can be seen from examples 1-3 and comparative examples 1-7;
the modified nano-alumina adopted by the invention can play a significant assisting and synergistic effect, improve the moisture releasing effect of the product and further play a role in reducing the drying efficiency; the carbon nano tube is replaced by graphene, so that the moisture release rate is obviously reduced, and the product can obviously improve the moisture absorption and moisture release effects by selecting and modifying the raw materials of the product.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (6)
1. An inorganic coating with moisture absorption and dryness reduction functions is characterized by comprising the following raw materials in parts by weight:
35-45 parts of modified oyster shell powder, 3-6 parts of sodium dodecyl sulfate, 3-7 parts of calcium titanate, 1-4 parts of rosin resin powder, 4-9 parts of modified nano aluminum oxide, 1-3 parts of micro silicon powder, 0.6-0.9 part of dispersing agent, 1-3 parts of silicon triphosphate and 40-50 parts of water; the modification method of the modified oyster shell powder comprises the following steps:
s11: stirring and mixing 20-30 parts of oyster shell powder in 35-45 parts of rare earth compound agent fully, washing with water, and drying to obtain rare earth compound processed oyster shell powder;
s12: adding hydrochloric acid into deionized water to prepare a hydrochloric acid solution with the mass fraction of 5%, then adding 1-5 parts of bis (dioctyloxy pyrophosphate) ethylene titanate, 1-3 parts of silane coupling agent KH560, 0.5-0.9 part of additive treating agent and 15-20 parts of bentonite, and fully stirring and mixing to obtain bentonite modified liquid;
s13: adding the rare earth compounded oyster shell powder into 2-3 times of bentonite modification liquid, stirring, washing with water, and drying;
s14: finally calcining for 1-5h at the temperature of 700-;
the preparation method of the rare earth compound agent comprises the following steps:
adding silica sol into 2-3 times of lanthanum chloride solution, then adding sodium alginate accounting for 5-10% of the total amount of the silica sol and sodium lignosulfonate accounting for 1-5% of the total amount of the silica sol, and fully stirring and mixing to obtain a rare earth compound agent; the additive treating agent is formed by performing electron irradiation treatment on the carbon nano tube for 10-20min at the power of 150-190W;
the modification method of the modified nano-alumina comprises the following steps:
s111: adding 10-15 parts of nano aluminum oxide into 75-85 parts of deionized water to prepare suspension;
s112: and adding stearic acid accounting for 5-10% of the total amount and a potassium acetate solution accounting for 1-5% of the total amount into the suspension, stirring and fully dispersing, and finally washing and drying to obtain the modified nano aluminum oxide.
2. The inorganic coating with the moisture absorption and dryness reduction functions as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight:
40 parts of modified oyster shell powder, 4.5 parts of sodium dodecyl sulfate, 5 parts of calcium titanate, 2.5 parts of rosin resin powder, 6.5 parts of modified nano-alumina, 2 parts of micro silicon powder, 0.75 part of dispersing agent, 2 parts of silicon tripolyphosphate and 45 parts of water.
3. The inorganic coating material with the function of absorbing moisture and reducing dryness as claimed in claim 1, wherein the mass fraction of the lanthanum chloride solution is 5-10%.
4. The inorganic paint with moisture absorption and drying function as claimed in claim 1, wherein the stirring treatment in S13 is performed at a rotation speed of 350-550r/min at 75-95 ℃ for 30-40 min.
5. The inorganic coating material with the moisture absorption and dryness reduction functions as claimed in claim 1, wherein the concentration of the potassium acetate solution is 1 to 1.5 mol/L.
6. The inorganic coating with the functions of absorbing moisture and reducing dryness as claimed in claim 1, wherein the dispersant is one or more of hydroxyethyl cellulose and polyoxyethylene lauryl ether.
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