CN115073944A - Smokeless fireproof inorganic coating - Google Patents
Smokeless fireproof inorganic coating Download PDFInfo
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- CN115073944A CN115073944A CN202210781151.XA CN202210781151A CN115073944A CN 115073944 A CN115073944 A CN 115073944A CN 202210781151 A CN202210781151 A CN 202210781151A CN 115073944 A CN115073944 A CN 115073944A
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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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to the field of inorganic coatings, and particularly discloses a smokeless fireproof inorganic coating which comprises the following raw materials in parts by weight: 30-40 parts of oyster shell powder, 10-15 parts of nano titanium dioxide modified composite silica sol, 5-10 parts of modified aluminum silicate fiber, 3-6 parts of fumed silica, 1-3 parts of wollastonite, 1-2 parts of calcium phosphate, 1-2 parts of calcium stearate, 4-8 parts of thickening agent and 40-50 parts of water. The fireproof inorganic coating disclosed by the invention takes oyster shell powder as a main material, and inorganic raw materials such as fumed silica, wollastonite, calcium phosphate and calcium stearate are matched to form the coating, so that the coating has excellent fireproof performance, the modified aluminum silicate fiber and the nano titanium dioxide modified composite silica sol have the effects of coordination and synergism, the strength and other performances of a product can be optimized by the coordination of the modified aluminum silicate fiber and the nano titanium dioxide modified composite silica sol, and meanwhile, the product is suitable for being applied in an alkaline environment, the stability of the flame retardant capability is high under the stability of the product, and the use efficiency of the coating is improved.
Description
Technical Field
The invention relates to the technical field of inorganic coatings, in particular to a smokeless fireproof inorganic coating.
Background
The fireproof paint is characterized in that the fireproof capacity of the material can be improved, the flame spread propagation speed can be slowed down, or the burning can be stopped within a certain time by brushing the paint on the surface of the material, and the paint is called fireproof paint or flame retardant paint. The fire-proof paint is a special paint which is used on the surface of flammable base material, can reduce the flammability of the surface of the material to be painted, can retard the rapid spread of fire and is used for improving the fire endurance of the material to be painted. The fire retardant is applied to the surface of a flammable base material to change the burning characteristics of the surface of the material and retard the rapid spread of fire; or special coatings applied to building components to increase the fire endurance of the component, known as fire-retardant coatings.
The conventional fireproof coating is mostly made of organic raw materials such as polyether polyol and the like, fireproof and flame-retardant are carried out, but the research point of the invention is how to achieve excellent flame-retardant performance of the combination of inorganic raw materials and inorganic coating, and based on the research point, the invention provides a smokeless fireproof inorganic coating.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a smokeless and fireproof inorganic coating 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 a smokeless fireproof inorganic coating which comprises the following raw materials in parts by weight:
30-40 parts of oyster shell powder, 10-15 parts of nano titanium dioxide modified composite silica sol, 5-10 parts of modified aluminum silicate fiber, 3-6 parts of fumed silica, 1-3 parts of wollastonite, 1-2 parts of calcium phosphate, 1-2 parts of calcium stearate, 4-8 parts of thickening agent and 40-50 parts of water.
Preferably, the inorganic coating comprises the following raw materials in parts by weight:
35 parts of oyster shell powder, 12.5 parts of nano titanium dioxide modified composite silica sol, 7.5 parts of modified aluminum silicate fiber, 4.5 parts of fumed silica, 2 parts of wollastonite, 1.5 parts of calcium phosphate, 1.5 parts of calcium stearate, 6 parts of thickening agent and 45 parts of water.
Preferably, the oyster shell powder is obtained by grinding oyster shell at 650-750 ℃ for 25-35min and then sieving the obtained product with 50-100 meshes.
Preferably, the preparation method of the nano titanium dioxide modified composite silica sol comprises the following steps:
s01: mixing 5-10 parts of chitosan, 2-4 parts of sodium alginate and 10-20 parts of deionized water, then adding 0.1-0.3 part of lanthanum sulfate solution, and continuously stirring and fully mixing to obtain a modified treatment solution;
s02: sending the nano titanium dioxide into 4-6 times of modification treatment liquid, stirring for 30-40min at 65-75 ℃ and the rotation speed of 550r/min, washing and drying after stirring to obtain modified nano titanium dioxide;
s03: stirring and fully mixing the modified nano titanium dioxide and the silica sol according to the weight ratio of 1 (2-5) to obtain the nano titanium dioxide modified composite silica sol.
Preferably, the particle size of the silica sol is 35-45 nm; the pH value is 3-6.
Preferably, the mass fraction of the lanthanum sulfate solution is 4-7%.
Preferably, the modification method of the modified aluminum silicate fiber comprises the following steps:
s111: adding 2-4 parts of triethanolamine borate and 1-3 parts of stearic acid into 45-55 parts of deionized water, and uniformly dispersing to obtain a treatment solution;
s112: 10-20 parts of aluminum silicate fiber is placed in 35-45 parts of treatment liquid, then 2-6 parts of alkyl sodium sulfonate and 1-3 parts of hydrochloric acid solution are added, stirred and mixed fully, and then the modified aluminum silicate fiber is obtained after washing and drying.
The inventor of the invention finds that the flame combustion time of the product is obviously reduced and the tensile strength is poor by modifying the composite silica sol without adding the nano titanium dioxide, and meanwhile, the modified aluminum silicate fiber is replaced by the aluminum silicate fiber, although the strength performance of the product has a trend of becoming strong, the flame retardant capability is obviously poor, so that the product cannot be replaced by the single aluminum silicate fiber;
in addition, the nano titanium dioxide modified composite silica sol is replaced by the silica sol, and the performance of the product tends to be poor due to different preparation methods, so that the raw materials are modified and prepared, and the improvement effect is most obvious;
meanwhile, the modified aluminum silicate fiber can improve the flame retardant capability of the product and the strength performance of the product, so that the performance of the product and the strength performance are coordinately improved.
The aluminum silicate fiber has a needle-shaped structure, and can play a role in reinforcing the nano titanium dioxide modified composite silica sol and enhancing the flame retardant capability of the product after the treatment solution, the sodium alkylsulfonate and the hydrochloric acid solution are jointly optimized and modified.
Preferably, the mass fraction of the hydrochloric acid solution is 3-6%.
Preferably, the rotation speed for stirring and mixing fully is 1000-1500r/min, and the stirring time is 35-45 min.
Preferably, the thickener is a cellulosic thickener; the cellulose thickener is hydroxypropyl methylcellulose.
The inventor of the invention finds that the flame retardant capability of the product is obviously deteriorated under the alkaline solution without adding the nano titanium dioxide modified composite silica sol, and meanwhile, the nano titanium dioxide modified composite silica sol in the product is replaced by the silica sol, so that the flame retardant capability of the product is deteriorated;
in addition, the surprising discovery that fumed silica and wollastonite are replaced by carbon nanotubes and graphene, the flame retardant capability of the product is obviously poor in an alkali environment, the compounding of fumed silica and wollastonite has a synergistic effect, the wollastonite has a needle-shaped structure, the specific surface area of fumed silica is large, the fumed silica is filled with raw materials, the compactness is enhanced, the wollastonite is inserted and inserted to further fill the product pores, the flame retardant stability in the alkali environment can be enhanced by the synergistic effect of the fumed silica and the wollastonite, and the carbon nanotubes and the graphene have high surface areas but are easy to contact with alkali, so that the corrosion capability is increased, and the flame retardant effect is influenced;
therefore, the gas-phase silicon dioxide and wollastonite in the product are matched with other raw materials to have synergistic effect and cannot be replaced by other raw materials.
Compared with the prior art, the invention has the following beneficial effects:
the fireproof inorganic coating disclosed by the invention takes oyster shell powder as a main material, and the matching of inorganic raw materials such as fumed silica, wollastonite, calcium phosphate and calcium stearate is carried out, so that the formed coating has excellent fireproof performance, the modified aluminum silicate fiber and the nano titanium dioxide modified composite silica sol have the effects of coordination and synergism, the fireproof and flame retardant properties of the product can be further enhanced, the strength and other properties of the product can be optimized by the coordination of the modified aluminum silicate fiber and the nano titanium dioxide modified composite silica sol, and meanwhile, the product is suitable for being applied in an alkaline environment, the stability of the flame retardant capability is high under the stability of the product, and the use efficiency of the coating is improved.
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 smokeless and fireproof inorganic coating provided by the embodiment comprises the following raw materials in parts by weight:
30-40 parts of oyster shell powder, 10-15 parts of nano titanium dioxide modified composite silica sol, 5-10 parts of modified aluminum silicate fiber, 3-6 parts of fumed silica, 1-3 parts of wollastonite, 1-2 parts of calcium phosphate, 1-2 parts of calcium stearate, 4-8 parts of a thickening agent and 40-50 parts of water.
The inorganic coating comprises the following raw materials in parts by weight:
35 parts of oyster shell powder, 12.5 parts of nano titanium dioxide modified composite silica sol, 7.5 parts of modified aluminum silicate fiber, 4.5 parts of fumed silica, 2 parts of wollastonite, 1.5 parts of calcium phosphate, 1.5 parts of calcium stearate, 6 parts of thickening agent and 45 parts of water.
The oyster shell powder is obtained by treating oyster shells at 650-750 ℃ for 25-35min and then grinding the oyster shells to 50-100 meshes.
The preparation method of the nano titanium dioxide modified composite silica sol comprises the following steps:
s01: mixing 5-10 parts of chitosan, 2-4 parts of sodium alginate and 10-20 parts of deionized water, then adding 0.1-0.3 part of lanthanum sulfate solution, and continuously stirring and fully mixing to obtain a modified treatment solution;
s02: sending the nano titanium dioxide into 4-6 times of modification treatment liquid, stirring for 30-40min at 65-75 ℃ and the rotation speed of 550r/min, washing and drying after stirring to obtain modified nano titanium dioxide;
s03: stirring and fully mixing the modified nano titanium dioxide and the silica sol according to the weight ratio of 1 (2-5) to obtain the nano titanium dioxide modified composite silica sol.
The particle size of the silica sol in the embodiment is 35-45 nm; the pH value is 3-6.
The mass fraction of the lanthanum sulfate solution of this example was 4-7%.
The modification method of the modified alumina silicate fiber in the embodiment comprises the following steps:
s111: adding 2-4 parts of triethanolamine borate and 1-3 parts of stearic acid into 45-55 parts of deionized water, and uniformly dispersing to obtain a treatment solution;
s112: 10-20 parts of aluminum silicate fiber is placed in 35-45 parts of treatment liquid, then 2-6 parts of alkyl sodium sulfonate and 1-3 parts of hydrochloric acid solution are added, stirred and mixed fully, and then the modified aluminum silicate fiber is obtained after washing and drying.
The mass fraction of the hydrochloric acid solution in this example was 3 to 6%.
The rotating speed for fully stirring and mixing the mixture in the embodiment is 1000-1500r/min, and the stirring time is 35-45 min.
The thickener of this example is a cellulosic thickener; the cellulose thickener is hydroxypropyl methylcellulose.
Example 1.
The smokeless and fireproof inorganic coating provided by the embodiment comprises the following raw materials in parts by weight:
30 parts of oyster shell powder, 10 parts of nano titanium dioxide modified composite silica sol, 5 parts of modified aluminum silicate fiber, 3 parts of fumed silica, 1 part of wollastonite, 1 part of calcium phosphate, 1 part of calcium stearate, 4 parts of thickening agent and 40 parts of water.
The oyster shell powder of the embodiment is obtained by treating oyster shells at 650 ℃ for 25min and then grinding the oyster shells to 50 meshes.
The preparation method of the nano titanium dioxide modified composite silica sol comprises the following steps:
s01: mixing 5 parts of chitosan, 2 parts of sodium alginate and 10 parts of deionized water, then adding 0.1 part of lanthanum sulfate solution, and continuously stirring and fully mixing to obtain a modified treatment solution;
s02: sending the nano titanium dioxide into 4 times of modification treatment liquid, stirring for 30min at 65 ℃ and 450r/min, washing and drying after stirring to obtain modified nano titanium dioxide;
s03: and stirring and mixing the modified nano titanium dioxide and the silica sol fully according to the weight ratio of 1:2 to obtain the nano titanium dioxide modified composite silica sol.
The particle size of the silica sol of the present example was 35 nm; the pH was 3.
The mass fraction of the lanthanum sulfate solution of this example was 4%.
The modification method of the modified alumina silicate fiber in the embodiment comprises the following steps:
s111: adding 2 parts of triethanolamine borate and 1 part of stearic acid into 45 parts of deionized water, and uniformly dispersing to obtain a treatment solution;
s112: and (2) putting 10 parts of aluminum silicate fiber into 35 parts of treatment liquid, then adding 2 parts of sodium alkylsulfonate and 1 part of hydrochloric acid solution, stirring and mixing fully, then washing with water, and drying to obtain the modified aluminum silicate fiber.
The mass fraction of the hydrochloric acid solution in this example was 3%.
The rotating speed for stirring and mixing fully in the embodiment is 1000r/min, and the stirring time is 35 min.
The thickener of this example is a cellulosic thickener.
Example 2.
The smokeless and fireproof inorganic coating provided by the embodiment comprises the following raw materials in parts by weight:
40 parts of oyster shell powder, 15 parts of nano titanium dioxide modified composite silica sol, 10 parts of modified aluminum silicate fiber, 6 parts of fumed silica, 3 parts of wollastonite, 2 parts of calcium phosphate, 2 parts of calcium stearate, 8 parts of thickening agent and 50 parts of water.
The oyster shell powder of the embodiment is obtained by treating oyster shells at 750 ℃ for 35min and then grinding the oyster shells to 100 meshes.
The preparation method of the nano titanium dioxide modified composite silica sol comprises the following steps:
s01: mixing 10 parts of chitosan, 4 parts of sodium alginate and 20 parts of deionized water, then adding 0.3 part of lanthanum sulfate solution, and continuously stirring and fully mixing to obtain a modified treatment solution;
s02: sending the nano titanium dioxide into 6 times of modification treatment liquid, stirring at the rotating speed of 550r/min at 75 ℃ for 40min, washing and drying after stirring to obtain modified nano titanium dioxide;
s03: and stirring and mixing the modified nano titanium dioxide and the silica sol fully according to the weight ratio of 1:5 to obtain the nano titanium dioxide modified composite silica sol.
The particle size of the silica sol of the present example was 45 nm; the pH was 6.
The mass fraction of the lanthanum sulfate solution of this example was 7%.
The modification method of the modified alumina silicate fiber in the embodiment comprises the following steps:
s111: adding 4 parts of triethanolamine borate and 3 parts of stearic acid into 55 parts of deionized water, and uniformly dispersing to obtain a treatment solution;
s112: and (3) putting 20 parts of aluminum silicate fiber into 45 parts of treatment liquid, then adding 6 parts of sodium alkylsulfonate and 3 parts of hydrochloric acid solution, stirring and mixing fully, then washing with water, and drying to obtain the modified aluminum silicate fiber.
The mass fraction of the hydrochloric acid solution in this example was 6%.
The rotating speed for sufficient stirring and mixing in the embodiment is 1500r/min, and the stirring time is 45 min.
The thickener of this example is a cellulosic thickener; the cellulose thickener is hydroxypropyl methylcellulose.
Example 3.
The smokeless and fireproof inorganic coating provided by the embodiment comprises the following raw materials in parts by weight:
35 parts of oyster shell powder, 12.5 parts of nano titanium dioxide modified composite silica sol, 7.5 parts of modified aluminum silicate fiber, 4.5 parts of fumed silica, 2 parts of wollastonite, 1.5 parts of calcium phosphate, 1.5 parts of calcium stearate, 6 parts of thickening agent and 45 parts of water.
The oyster shell powder is obtained by treating oyster shells at 700 ℃ for 30min and then grinding the oyster shells to 75 meshes.
The preparation method of the nano titanium dioxide modified composite silica sol comprises the following steps:
s01: mixing 7.5 parts of chitosan, 3 parts of sodium alginate and 15 parts of deionized water, then adding 0.2 part of lanthanum sulfate solution, and continuously stirring and fully mixing to obtain a modified treatment solution;
s02: sending the nano titanium dioxide into 5 times of modification treatment liquid, stirring at 70 ℃ and a rotating speed of 500r/min for 35min, washing and drying after stirring to obtain modified nano titanium dioxide;
s03: and stirring and mixing the modified nano titanium dioxide and the silica sol fully according to the weight ratio of 1:3.5 to obtain the nano titanium dioxide modified composite silica sol.
The particle size of the silica sol of this example was 40 nm; the pH was 4.5.
The mass fraction of the lanthanum sulfate solution of this example was 5.5%.
The modification method of the modified alumina silicate fiber in the embodiment comprises the following steps:
s111: adding 3 parts of triethanolamine borate and 2 parts of stearic acid into 50 parts of deionized water, and uniformly dispersing to obtain a treatment solution;
s112: and (3) putting 15 parts of aluminum silicate fiber into 40 parts of treatment liquid, then adding 4 parts of sodium alkylsulfonate and 2 parts of hydrochloric acid solution, stirring and mixing fully, then washing with water, and drying to obtain the modified aluminum silicate fiber.
The mass fraction of the hydrochloric acid solution in this example was 4.5%.
The rotating speed for stirring and mixing fully in the embodiment is 1250r/min, and the stirring time is 40 min.
The thickener of this example is a cellulosic thickener; the cellulose thickener is hydroxypropyl methylcellulose.
Example 4.
The smokeless and fireproof inorganic coating provided by the embodiment comprises the following raw materials in parts by weight:
32 parts of oyster shell powder, 12 parts of nano titanium dioxide modified composite silica sol, 6 parts of modified aluminum silicate fiber, 4 parts of fumed silica, 1.5 parts of wollastonite, 1.5 parts of calcium phosphate, 1.2 parts of calcium stearate, 5 parts of thickening agent and 42 parts of water.
The oyster shell powder of the embodiment is obtained by treating oyster shells at 680 ℃ for 30min and grinding the oyster shells to 60 meshes.
The preparation method of the nano titanium dioxide modified composite silica sol comprises the following steps:
s01: mixing 6 parts of chitosan, 3 parts of sodium alginate and 12 parts of deionized water, then adding 0.12 part of lanthanum sulfate solution, and continuously stirring and fully mixing to obtain a modified treatment solution;
s02: sending the nano titanium dioxide into 5 times of modification treatment liquid, stirring at 68 ℃ and 470r/min for 35min, washing and drying after stirring to obtain modified nano titanium dioxide;
s03: and stirring and mixing the modified nano titanium dioxide and the silica sol fully according to the weight ratio of 1:3 to obtain the nano titanium dioxide modified composite silica sol.
The particle size of the silica sol of this example was 38 nm; the pH was 4.
The mass fraction of the lanthanum sulfate solution of this example was 5%.
The modification method of the modified alumina silicate fiber in the embodiment comprises the following steps:
s111: adding 3 parts of triethanolamine borate and 2 parts of stearic acid into 46 parts of deionized water, and uniformly dispersing to obtain a treatment solution;
s112: and (3) putting 12 parts of aluminum silicate fiber into 36 parts of treatment liquid, then adding 3 parts of sodium alkylsulfonate and 2 parts of hydrochloric acid solution, stirring and mixing fully, then washing with water, and drying to obtain the modified aluminum silicate fiber.
The mass fraction of the hydrochloric acid solution in this example was 4%.
The rotating speed for sufficient stirring and mixing of the embodiment is 1200r/min, and the stirring time is 36 min.
The thickener of this example is a cellulosic thickener; the cellulose thickener is hydroxypropyl methylcellulose.
Comparative example 1.
Different from the embodiment 3, the nano titanium dioxide is not added to modify the composite silica sol.
Comparative example 2.
Different from the embodiment 3, the nano titanium dioxide modified composite silica sol is replaced by silica sol.
Comparative example 3.
Different from the embodiment 3, the preparation method of the nano titanium dioxide modified composite silica sol is different;
stirring and mixing the nano titanium dioxide and the silica sol fully according to the weight ratio of 1:3.5, then adding hydrochloric acid aqueous solution with the mass fraction of 5 percent which is 3 times that of the nano titanium dioxide, stirring and dispersing fully to obtain the nano titanium dioxide modified composite silica sol.
Comparative example 4.
The difference from the example 3 is that the modified aluminosilicate fiber is replaced by aluminosilicate fiber.
Comparative example 5.
The difference from example 3 is that triethanolamine borate was not added to the treatment liquid in the modification of the aluminum silicate fiber.
Comparative example 6.
The difference from the example 3 is that the sodium alginate aqueous solution with the mass fraction of 20 percent is adopted as the treatment fluid in the modification of the aluminum silicate fiber.
Comparative example 7.
Different from example 3, fumed silica and wollastonite were replaced with carbon nanotubes and graphene.
The flaming combustion time is determined by GB/T5455-1997 textile Combustion energy test-vertical method.
The products of examples 1-4 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 4;
the flame combustion time of the product is obviously reduced and the tensile strength is poor by not adding the nano titanium dioxide modified composite silica sol, and meanwhile, the modified aluminum silicate fiber is replaced by the aluminum silicate fiber, although the strength performance of the product has a trend of becoming strong, the flame retardant capability is obviously poor, so that the product cannot be replaced by single aluminum silicate fiber;
in addition, the nano titanium dioxide modified composite silica sol is replaced by silica sol, and the preparation methods are different, so that the performance of the product has a variation trend;
meanwhile, the modified aluminum silicate fiber can improve the flame retardant capability of the product and the strength performance of the product, so that the performance of the product and the strength performance are coordinately improved.
The product of the invention is placed in 5-9% alkali solution environment for 1h and then subjected to formation test:
as can be seen from examples 1 to 4 and comparative examples 1 to 7;
according to the invention, the nano titanium dioxide modified composite silica sol is not added, the flame retardant capability of the product is obviously deteriorated in an alkaline solution, and meanwhile, the nano titanium dioxide modified composite silica sol in the product is replaced by the silica sol, so that the flame retardant capability of the product is deteriorated; the product of the invention tends to be stable, and the product performance under alkaline solution is stable;
in addition, the carbon nano tubes and graphene are used for replacing fumed silica and wollastonite, the flame retardant capability of the product is obviously poor in the alkali environment, the fumed silica and the wollastonite have a synergistic effect in combination, the wollastonite has a needle-shaped structure, the specific surface area of the fumed silica is large, the fumed silica is filled with raw materials, the compactness is enhanced, the wollastonite is inserted in the wollastonite, and the product pores are further filled.
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 description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The smokeless and fireproof inorganic coating is characterized by comprising the following raw materials in parts by weight:
30-40 parts of oyster shell powder, 10-15 parts of nano titanium dioxide modified composite silica sol, 5-10 parts of modified aluminum silicate fiber, 3-6 parts of fumed silica, 1-3 parts of wollastonite, 1-2 parts of calcium phosphate, 1-2 parts of calcium stearate, 4-8 parts of thickening agent and 40-50 parts of water.
2. The smokeless and fireproof inorganic coating of claim 1, wherein the inorganic coating comprises the following raw materials in parts by weight:
35 parts of oyster shell powder, 12.5 parts of nano titanium dioxide modified composite silica sol, 7.5 parts of modified aluminum silicate fiber, 4.5 parts of fumed silica, 2 parts of wollastonite, 1.5 parts of calcium phosphate, 1.5 parts of calcium stearate, 6 parts of thickening agent and 45 parts of water.
3. The smokeless and fireproof inorganic coating of claim 1, wherein the oyster shell powder is obtained by grinding oyster shell at 650-750 ℃ for 25-35min and then sieving with 50-100 mesh sieve.
4. The smokeless and fireproof inorganic coating of claim 1, wherein the preparation method of the nano titanium dioxide modified composite silica sol comprises the following steps:
s01: mixing 5-10 parts of chitosan, 2-4 parts of sodium alginate and 10-20 parts of deionized water, then adding 0.1-0.3 part of lanthanum sulfate solution, and continuously stirring and fully mixing to obtain a modified treatment solution;
s02: sending the nano titanium dioxide into 4-6 times of modification treatment liquid, stirring for 30-40min at 65-75 ℃ and the rotation speed of 550r/min, washing and drying after stirring to obtain modified nano titanium dioxide;
s03: stirring and fully mixing the modified nano titanium dioxide and the silica sol according to the weight ratio of 1 (2-5) to obtain the nano titanium dioxide modified composite silica sol.
5. The smokeless and fireproof inorganic coating of claim 4, wherein the silica sol has a particle size of 35-45 nm; the pH value is 3-6.
6. The smokeless and fireproof inorganic coating of claim 4, wherein the lanthanum sulfate solution is 4-7% by mass.
7. The smokeless and fireproof inorganic coating according to claim 1, wherein the modified alumina silicate fiber is modified by the following method:
s111: adding 2-4 parts of triethanolamine borate and 1-3 parts of stearic acid into 45-55 parts of deionized water, and uniformly dispersing to obtain a treatment solution;
s112: 10-20 parts of aluminum silicate fiber is placed in 35-45 parts of treatment liquid, then 2-6 parts of alkyl sodium sulfonate and 1-3 parts of hydrochloric acid solution are added, stirred and mixed fully, and then the modified aluminum silicate fiber is obtained after washing and drying.
8. The smokeless and fireproof inorganic coating of claim 7, wherein the hydrochloric acid solution is 3-6% by weight.
9. The smokeless and fireproof inorganic coating of claim 7, wherein the rotation speed for sufficient stirring and mixing is 1000-.
10. The smokeless and fireproof inorganic paint of claim 1, wherein the thickener is a cellulose thickener; the cellulose thickener is hydroxypropyl methylcellulose.
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| CN117070113A (en) * | 2023-10-17 | 2023-11-17 | 广东东方一哥新材料股份有限公司 | Water-based inorganic coating with fireproof effect and preparation method thereof |
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| CN117070113A (en) * | 2023-10-17 | 2023-11-17 | 广东东方一哥新材料股份有限公司 | Water-based inorganic coating with fireproof effect and preparation method thereof |
| CN117070113B (en) * | 2023-10-17 | 2023-12-19 | 广东东方一哥新材料股份有限公司 | Water-based inorganic coating with fireproof effect and preparation method thereof |
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| CN115073944B (en) | 2023-03-14 |
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